TECH CONDITIONS T 150 Cyclone TGM 84. Boiler-auxiliary equipment

Deciphering TGM - 84 - Taganrog gas-fledged boiler 1984 release.

The TGM-84 boiler is designed according to the P-shaped layout and consists of a flue chamber that is a rising gas duct, and a lower convective mine separated by two gas strokes.

The transitional horizontal gas duct between the furnace and the convective shaft is practically absent. In the top of the furnace and the rotary chamber there is a wide steamer. In a convective mine, divided into two gas strokes, are placed in series (along the flue gases) horizontal superheater and water economizer. The water economizer is a rotary chamber with anti-arriving bunkers.

Two included parallel regenerative air heater installed behind the convective shaft.

The furnace chamber has a conventional prismatic shape with dimensions between the axes of the pipes 6016 14080 mm and is divided into two half-blowing watercourse. The side and rear walls of the furnace chamber are shielded by evaporative pipes with a diameter of 60 6 mm (steel 20) in 64mm increments. The side screens in the lower part have the rods to the middle, at the bottom of the angle of 15 to the horizontal, and form "cold under.

The two-minute screen also consists of pipes with a diameter of 60 6 mm in 64mm increments and has windows formed by pipe wiring, to equalize the pressure in half-over. The on-screen system with the help of the thrust is suspended to the metal structures of the ceiling overlap and has the ability to freely drop down when thermal expansion.

The ceiling of the furnace chamber is made horizontal and shielded ceiling steamer pipes.

The furnace chamber is equipped with 18 fuel burners, which are located on the front wall in three tiers.

A drum is installed on the boiler internal diameter of 1800mm. The length of the cylindrical part is 16200 mm. In the boiler of the boiler, separation and flushing of a pair of nutrient water are organized.

The TGM-84 boiler operator in the nature of the heat perception of radiation-convective and consists of the three following main parts: radiation, shirm (or semiradiation) and convective.

The radiation unit consists of a wall and ceiling steamer.

Semiradiative steamer from 60 unified Shirm.

The convective horizontal type steamer consists of two parts placed in two risks of the lowered mine over a water economizer.

On the front wall of the heat chamber, a wall-mounted steamper washed, made in the form of six transportable blocks of pipes with a diameter of 42x5.5 mm (art. 12x1mf).

The ceiling superheater inlet camera consists of two welded collectors forming a common chamber one on each half-gun. The output chamber of the ceiling superheater is one and consists of six collectors' welded.

The input and output chamber of the wiring superheater is located one above the other and made of pipes with a diameter of 133x13 mm.

The convective steamer is made by Z - the figurative scheme, i.e. Couple comes from the front wall side. Each package consists of 4-axis coils.

The device for regulating the overheating temperature of the steam includes: condensation installation and injection pairochholders. Injecting steam detergents are installed in front of the screening steamers in the wiring dissection and in the dissection of the convective steamer. When the boiler is running on gas, all the steamers work, when working on fuel oil - only installed in the dissection of the convective steamer.

The steel coating of a water economizer consists of two parts placed in the left and right roshodes of the sink convective shaft.

Each part of the economizer consists of 4 packages in height. In each package, two blocks, in each block 56 or 54 of the four-day coil from the pipes with a diameter of 25x3.5 mm (Steel20). Snakes are located in parallel to the front of the boiler in a checkerboard with a step of 80mm. Economizer collectors are outwarded to the convective shaft.

On the boiler there are two regenerative rotating aircraft heater RVP-54. The air heater is carried out and is a rotating rotor, enclosed inside the fixed body. The rotation of the rotor is carried out by an electric motor with a gearbox with a speed of 3 rpm. The decrease in the cold air supplies into the air heater and air flows from the air side to the gas is achieved by installing radial and peripheral seals.

The boiler frame consists of metal columns associated with horizontal beams, farms and disclosures and serves to perceive loads from the weight of the drum, the surfaces of heating, irrigation, service platforms, gas-producing and other elements of the boiler. The frame is made welded from profile rental and sheet steel.

To clean the surfaces of the convective steamer and water economizer, a shot blasting unit is used, in which the kinetic energy is used freely falling crushing, with a size of 3-5 mm. Gas pulse cleaning can also be used.

Course project

Caliling thermal calculation of the TGM-84 boiler unit E420-140-565

Task for the course project ...........................................................................

Brief description of the boiler installation .. .......................................... .. ...

Fake camera .................................................................................................. ..
In-depraved devices ........................................... ........ ...
Superheater……………………………………………………..……..
- Radiation steamer ..........................................
- Ceiling superheater ................................. .. ..........
- Shirm steamer ................................. .. ......... ...
- Convective superheater ..........................................
Water economizer ..................................................................
Regenerative air heater ...........................................
Cleaning the heating surfaces ................................................... ..

Calculation of the boiler ......................................................................... .........

2.1. The composition of the fuel .........................................................................

2.2. Calculation of volumes and enthalpium products of combustion ..............................

2.3. Estimated thermal balance and fuel consumption ..................................

2.4. Calculation of the furnace chamber .................................................................................

2.5. Calculation of boiler steamers ................................................ ..

2.5.1 Calculation of a wall-mounted steamer ............................... .......

2.5.2. Calculation of the ceiling superheater ........................ .. ..........

2.5.3. Calculation of the wired steamer .....................................

2.5.4. Calculation of the convective steamer ..................... .. ..........

2.6. Conclusion ......................................................................................... ..

Bibliography……………………………………………….

The task

It is necessary to produce calibration thermal calculation of the TGM-84 of the E420-140-565 brand.

In the calibration thermal calculation according to the adopted design and the size of the boiler for the specified load and the type of fuel, the water temperatures, steam, air and gases are determined at the boundaries between the individual heating surfaces, the efficiency, fuel consumption, consumption and velocity of steam, air and flue gases.

Calculation Calculation is made to assess the indicators of the cost-effectiveness and reliability of the boiler when working on a given fuel, identifying the necessary reconstructive activities, the choice of auxiliary equipment and the preparation of the source materials for the calculations: aerodynamic, hydraulic, metal temperature, pipe strength, the intensities of the hydraulic wear of pipes, corrosion, etc. .

Initial data:

Rated steam output D 420 t / h
PV PV 230 ° C
The temperature of the superheated steam 555 ° C
Pressure overheated steam 14 MPa
Working pressure in the boiler drum 15.5 MPa
Cold air temperature 30 ° С
The temperature of the outgoing gases 130 ... 160 ° C
Fuel Natural gas Gas pipeline Nadym-Pung-Tura-Sverdlovsk-Chelyabinsk
Lowest heat combustion 35590 kj / m 3
The volume of firebox 1800m 3
Diameter of on-screen pipes 62 * 6 mm
Step pipes of screens 60 mm.
Pipe diameter 36 * 6
CPP layout
Transverse pitch PPP S 1 120 mm
Longitudinal pitch PPP S 2 60 mm
Pipe diameter SPP 33 * 5 mm
PPP diameter 54 * 6 mm
Live cross section area for the passage of combustion products 35.0 mm

1. The foundation of the TGM-84 steam boiler and the basic parameters.

Boiler units of the TGM-84 series are designed to obtain a high pressure steam when combing fuel oil or natural gas.

Brief description of the steam boiler.

All TGM-84 series boilers have a P-shaped layout and consist of a flue chamber, which is a rising gas duct, and a lower convective mine, connected in the upper part with a horizontal gas duct.

Evapory screens and radiation wall steam steampers are placed in the furnace chamber. In the upper part of the furnace (and in some modifications of the boiler and in the horizontal gas duct) there is a wide steamer. In a convective mine, a convective (in the course of gases) contains a convective steamer and a water economizer. A convective mine after a convective superheater is divided into two gas strokes, each of which is one stream of water economizer. For a water economizer, the gas duct makes a turn at the bottom of which bins for ash and fractions are installed. Regenerative rotating air heaters are installed behind a convective mine outside the boiler house.

1.1. Floor chamber.

The furnace chamber has a prismatic shape and in terms of rectangle size: 6016x14080 mm. The side and rear walls of the furnace chamber of all types of boilers are shielded by evaporative pipes with a diameter of 60x6 mm in a step of 64 mm made of steel 20. The radiation steamer is placed on the front wall, the design of which is described below. The two-minute screen divides the filling chamber into two semi-furnaces. The double-screen screen consists of three panels and is formed by pipes with a diameter of 60x6 mm (steel 20). The first panel consists of twenty-six pipes with a pitch between pipes 64 mm; The second panel is from twenty-eight pipes with a step between pipes 64 mm; The third panel is from twenty nine pipes, the step between the pipes is 64 mm. The input and output reservoirs of the two-windscreen are made of pipes with a diameter of 273x32 mm (Steel20). The two-minute screen with the help of the thrust is suspended with the ceiling overlap metal structures and has the ability to move at a temperature expansion. In order to align the pressure on half-blowing in a two-fold screen, there are windows formed by pipe wiring.

Side and rear screens are made structurally identical for all types of TGM-84 boilers. The side screens at the bottom form the cold funnels with a slope of 15 0 to the horizontal. With the fir side, the pipe pipes are closed with a layer of chamotte brick and a layer of chromite mass. In the upper and lower parts of the heat chamber, side and rear screens are connected to collectors with a diameter of 219x26 mm and 219x30 mm, respectively. The upper rear screen collectors are made of pipes with a diameter of 219x30 mm, the bottom of the pipes with a diameter of 219x26 mm. Screen collector material - steel 20. Submission of water to collectors of screens is carried out by pipes with a diameter of 159x15 mm and 133x13 mm. The cutting machine washed with pipes with a diameter of 133x13 mm. Pipes of screens are attached to the beams of the boiler frame to prevent the brass in the furnace. The side screens and two-fold screen have four fastener tiers, the rear screen panels are three tiers. The suspension of the panels of the fiber screens is carried out using the thrust and allows vertical movement of pipes.

Pasteing of pipes in the panels is carried out by welded rods with a diameter of 12 mm, a length of 80 mm, the material - steel 3kp.

In order to reduce the effect of uneven heating on circulation all the screens of the heat chamber are partitioned: Pipes with collectors are made in the form of a panel, each of which is a separate circulation circuit. In total, there are fifteen panels in the furnace: the rear screen has six panels, two-time and each side screen three panels. Each rear screen panel consists of thirty-five evaporative pipes, three water-powered and three drainage pipes. Each side screens panel consists of thirty-one evaporative pipes.

In the upper part of the heat chamber, there is a protrusion (in the depth of the furnace), formed by the rear screen pipes, which contributes to the best wash with smoke gases of the wiring part of the steamer.

1.2. Umbrane devices.

1 - Digit order; 2 - the box of cyclone; 3 - blunt box; 4 - cyclone; 5 - pallet; 6 - emergency plum pipe; 7 - the phosphating manifold; 8 - collector of steam heating; 9 - leaf hole ceiling; 10 - nutritious pipe; 11 - sheet of barber.

On this boiler, TGM-84 uses a two-stage evaporation scheme. The drum is a pure compartment and is the first step of evaporation. The drum has an inner diameter of 1600 mm and made of steel 16GNM. The wall thickness of the drum is 89 mm. The length of the cylindrical part of the drum is 16200 mm, the total length of the drum is 17990 mm.

The second stage of evaporation is remote cyclones.

A steamwatering mixture of steam pipes enters the boiler drum - into the distribution boxes of cyclones. In cyclones, a pair of water is separated. Water from cyclones merges into pallets, and the separated pa vapor enters the flushing device.

Washing steam is carried out in a layer of nutrient water, which is supported on a hole sheet. Couple passes through the holes in the hole sheet and barbatches through a layer of nutrient water, freeing from the salts.

Distributing boxes are located above the washing device and have in their lower part of the water drain.

The average water level in the drum is below the geometric axis by 200 mm. On waterproof devices, this level is accepted for zero. The highest and lower levels are respectively lower and higher from the average to 75 m. To prevent the copper of the boiler in the drum, an emergency drain pipe is installed, which allows you to drop an excessive amount of water, but not greater than the average level.

For processing boiler water with phosphates, a pipe is installed in the lower part of the drum, through which phosphates are introduced into the drum.

At the bottom of the drum there are two collectors of steam heating of the drum. In modern steam boilers, they are used only for accelerated drums in the boiler stop. Maintaining the relationship between the body temperature of the Top-Ben Body is achieved by regime measures.

1.3. Superheater.

The surfaces of the superheater on all boilers are placed in a fire chamber, a horizontal gas duct and a convective mine. By the nature of the heat-perception, the steamer is divided into two parts: radiation and convective.

The radiation part includes a radiation-wall superheater (NPP), the first stage of the Shirm and part of the ceiling steamer, located above the heat chamber.

The convective part belongs to the part of the wide superheater (which does not receive directly radiation from the furnace), the ceiling superheater and the convective steamer.

The steamer scheme is made of two-way with repeated stirring of steam inside each thread and a steam transfer along the width of the boiler.

Schematic diagram of steps.

1.3.1. Radiation steamer.

On the boilers of the TGM-84 series, the pipes of the radiation operator shields the front wall of the flue chamber from a mark of 2000 mm to 24600 mm and consist of six panels, each of which is an independent circuit. Pipes panels have a diameter of 42x5 mm, made of steel 12x1mf, installed in a step of 46 mm.

In each panel, twenty-two pipes are lowered, the rest are lifting. All panel collectors are located outside the heated zone. Upper collectors with the help of thrust are suspended with ceiling overlap metal structures. The fastening of pipes in the panels is carried out by distinguishing placas and welded rods. In the panels of the radiation superheater, there are wiring for the installation of burners and layout under the lazium and luch-glades.

1.3.2. Ceiling steamer.

The ceiling steamer is located above the heat chamber, horizontal gas duct and convective shaft. The ceiling on all boilers made of pipes with a diameter of 32x4 mm in the amount of three hundred ninety-four pipes placed in 35 mm increments. The mounting of the ceiling pipes is made as follows: rectangular strips are welded in one end to the pipes of the ceiling steamer, to others - to special beams, which are suspended with the help of the ceiling overlap. The length of the ceiling pipes has eight rows of fasteners.

1.3.3. Shirm Steamer (SPP).

On the boilers of the TGM-84 series, two types of vertical shirms are installed. Screenshots U-shaped with coils of different lengths and unified shirms with coils of the same length. Shirms are installed in the top of the furnace and in the output windows of the furnace.

On fuel oil boilers, U-shaped shirms are installed in one or two rows. Unified shirms in two rows are installed on gas-gas boilers.

Inside each U-shaped screen - forty-one serpentine, which are installed in 35 mm increments, in each of the series eighteen shirm, between shirms step 455 mm.

The step between coils inside the unified Shirm 40 mm, in each of the series it is set to thirty-wide shirms, each twenty-three coils. The remantization of coils in Shirma is carried out using a comb and clamps, in some structures - welded rods.

The Suspension of the wiring steamer is carried out to the ceiling metal structures using the collectors welded to the ears. In the case when the collectors are located one over the other, the lower collector is suspended to the top, and then in turn to the ceiling overlap.

1.3.4. Convective steamer (PPC).

Convective Steamer Scheme (PPC).

On TGM-84 boilers, the convective horizontal type steamer is located at the beginning of the convective shaft. The steamer is performed by two-way and each stream is located symmetrically relative to the axis of the boiler.

The suspension of the packets of the front level of the steamer is made on the suspended pipes of the convective mine.

The weekend (second) stage is located first in a convective mine along the gas ducts. The coils of this step are also made of pipes with a diameter of 38x6 mm (steel 12x1mf) with the same steps. Input collectors with a diameter of 219x30 mm, the output with a diameter of 325x50 mm (steel 12x1mf).

Fastening and disconnection of analogously to the input level.

In some variants of boilers, steamers differ from the input and output collectors described above and steps in the packages of coils.

1.4. Water economizer

Water economizer is located in a convective mine, which is divided into two gas strokes. Each of the streams of the water economizer is located in the corresponding gas duct, forming two parallel independent flow.

In the height of each sheather, the water economizer is divided into four parts, between which there are 665mm highs with a height of 665mm (on some boilers are a height of 655mm) for the production of repair work.

The economizer is made of pipes with a diameter of 25x3,3mm (steel 20), and the input and output collectors are made with a diameter of 219x20mm (steel 20).

Packages of the water economizer are made of 110 double mining coils. Packages are located in a checkerboard with a transverse step S 1 \u003d 80mm and a longitudinal step S 2 \u003d 35mm.

Water economizer coils are located in parallel to the front of the boiler, and the collectors are located outside the gas plant on the side walls of the convective shaft.

Distanceing coils in packages carried out with the help of five rows of racks, whose curly cheats cover a coil from two sides.

The upper part of the water economizer is based on three beams located inside the gas and air cooled. The next part (the second in the gas) is suspended to the above-mentioned cooled beams with the help of distortional racks. Fastening and suspension of the lower two parts of the water economizer is identical to the first two.

Cooled beams are made of rolled and coated with thermal protection concrete. From above, concrete is covered with a metal sheet that protects the beams from fraud.

The first in the course of the movement of the flue gases of coils have metal lining of steel3 to protect against wear by the fraction.

The input and output collectors of the water economizer have 4 movable supports to compensate for temperature movements.

Movement of the medium in a water economizer - countercurrent.

1.5. Regenerative air heater.

For heating air, the boiler unit has two regenerative rotating aircraft heater RRV-54.

RVP design: typical, frameless, the air heater is installed on a special reinforced concrete pedestal of a frame type, and all the auxiliary nodes are attached on the air itself.

The weight of the rotor is transmitted through the thrust spherical bearing mounted in the lower support, on the carrier beam, in four supports on the foundation.

The air heater is rotating on the vertical shaft of the rotor with a diameter of 5400 mm and a height of 2250 mm prisonered inside the fixed body. Vertical partitions divide the rotor into 24 sectors. Each remote partition sector is divided into 3 compartments, in which the packets of heating steel sheets are stacked. Heating sheets collected in packets are laid in two tiers in the height of the rotor. The top tier is the first in the course of gases, is a "hot part" of the rotor, the lower - "cold part".

The "hot part" with a height of 1200 mm is made of distainer corrugated sheets with a thickness of 0.7 mm. The overall surface of the "hot part" of two devices is 17896 m2. The cold part with a height of 600 mm is made of distainer corrugated sheets with a thickness of 1.3 mm. The overall surface of the heating of the cold part of the heating of 7733 m2.

The gaps between the remote partitions of the rotor and packing packages are filled with separate sheets of additional packing.

Gases and air enter the rotor and are discharged from it by boxes based on the special frame and connected to the lower caps of the air heater. The covers together with the casing form the air heater housing.

The housing of the bottom cover relies on the supports installed on the foundation and the bearing of the bottom support. The vertical cover consists of 8 sections, of which 4 are carriers.

Rotation of the rotor is carried out by an electric motor with a gearbox through the lap engagement. Rotation speed - 2 rpm.

Rotor packing packages alternately pass the gas tract, warming up from flue gases, and an air tract giving a battery airflow. At each moment of time, 13 sectors of 24 are included in the gas tract, and 9 sectors - in the air and 2 sectors are covered with sealing plates and disconnected from work.

To prevent air supplements (dense separation of gas and air flow) there are radial, peripheral and central seals. Radial seals consist of horizontal steel strips fixed on radial partitions of the rotor - radial moving plates. Each plate is fixed on the upper and lower caps with three adjusting bolts. The adjustment of the gaps in the seals is carried out by the rise and lowering the plates.

The peruperial seals consist of rotor flanges, stuffed during installation, and movable cast iron pads. Pads together with guides are fixed on the top and bottom cover of the RVP case. Adjusting the pads is carried out by special adjustment bolts.

Internal shaft seals are similar to the peripheral seals. External seals of the shaft of the seal type.

Live cross section for gases: a) in the "cold part" - 7.72 m2.

b) in the "hot part" - 19.4 m2.

Live cross section for air passage: a) in the "hot part" - 13.4 m2.

b) in the "cold part" - 12.2 m2.

1.6. Cleaning the heating surfaces.

For cleaning the surfaces of heating and hydrochda, shot writing is used.

With a shot blasting method of cleaning the surfaces of heating, a cast-iron fraction of a round shape of 3-5 mm is used.

For normal operation, the contour of the shot writing in the bunker should be about 500 kg of fraction.

When the air ejector is turned on, the necessary air velocity is created for lifting the fraction through the pneumatic tube to the top of the convective mine in the shotgun. From the shotgun, the exhaust air is discharged into the atmosphere, and fraction through the conical flaying, the intermediate bunker with a wire mesh and through the fraci separator, the fraci flows in flow.

In leaks, the flow rate of the fraction is slowed down using inclined shelves, after which the fraction falls on spherical spreaders.

Passing through the cleaned surfaces, which spent the shot collected in the bunker, at the output of which the air separator is installed. The separator serves to separate the ash from the flow of the fraction and to maintain the bins in the purity of the bunker by air entering the gas duct through the separator.

The ash particles, pickled, air, are returned to the zone of active flue gases and are carried out beyond the convective shaft. The fraction cleaned from the ash is passed through the separator flasher and through the wire mesh of the bunker. From the bunker, the fraction is again served in the pneumatic transport pipe.

For cleaning the convective mine, 5 contours of 10 leaks are installed.

The amount of fraction passed through the flow of purification pipes increases with an increase in the initial degree of the beam contamination. Therefore, during the operation of the installation, it is necessary to strive for a decrease in the intervals between the purification, which allows relatively small portions of the fraction to maintain the surface in its pure state and, therefore, during the operation of the aggregates for the entire company have the minimum values \u200b\u200bof pollution coefficients.

To create discharge in the ejector, air from the discharge plant with a pressure of 0.8-1.0 ATI and a temperature of 30-60 o C were used.

Calculation of the boiler.

2.1. Fuel composition.

2.2. Calculation of volumes and enthalpy of air and combustion products.

Calculations of air and combustion products are presented in Table 1.

Calculation of enthalpy:

Enthalpy theoretically necessary amount of air is calculated by the formula

where - enthalpy 1 m 3 air, KJ / kg.

This enthalpy can also be found along the XVI table.

The enthalpy of the theoretical volume of combustion products is calculated by the formula

where, - enthalpy 1 m 3 of trochatomic gases, theoretical volume of nitrogen, theoretical volume of water vapor.

We find this enthalpy for the whole range of temperatures and the obtained values \u200b\u200bare in a table 2.

Enthalpy excess air expect for the formula

where is an excess air coefficient, and is located on the XVII and XX tables

Enthalpy of combustion products at a\u003e 1 Calculate the formula

This enthalpy is found for the entire temperature range and the obtained values \u200b\u200bare in Table 2.

2.3. Estimated thermal balance and fuel consumption.

2.3.1. Calculation of heat loss.

The total amount of heat entered into the boiler unit is called the warmth and denoted. The heat that left the boiler unit is the amount of useful warmth and heat loss associated with the technological process of developing steam or hot water. Consequently, the heat balance of the boiler has the form: \u003d Q 1 + Q 2 + Q 3 + Q 4 + Q 5 + Q 6,

where - located heat, kj / m 3.

Q 1 - useful heat contained in a pair, KJ / kg.

Q 2 - Warm loss with exhaust gases, KJ / kg.

Q 3 - the loss of heat from the chemical incompleteness of combustion, KJ / kg.

Q 4 - the loss of heat from the mechanical incompleteness of combustion, KJ / kg.

Q 5 - Warm loss from outdoor cooling, KJ / kg.

Q 6 - the loss of heat from the physical heat contained in the removable slag, plus the losses for cooling panels and beams not included in the circulation circuit of the boiler, KJ / kg.

The heat balance of the boiler is compiled in relation to the steady heat regime, and the loss of heat is expressed as a percentage of disposable warmth:

The calculation of the heat loss is shown in Table 3.

Notes to Table 3:

H Wow - the enthalpy of the outgoing gases is determined by table 2.

N OKH - emission-visible surface of beams and panels, m 2;

Q to - useful power of the steam boiler.

2.3.2. Calculation of efficiency and fuel consumption.

The efficiency of the steam boiler is called the ratio of useful heat to the warmth. Not all useful heat generated by the unit is sent to the consumer. If the efficiency is determined by the warmth developed - it is called gross if the heat released is net.

The calculation of the efficiency and fuel consumption is shown in Table 3.

Table 1.

The calculated value	Mostoz-outpound	Dimension	Calculation or justification
Theoretical number necessary for complete fuel combustion.			0,0476(0,50+0,50++1,50+(1+4/4)98,2+ +(2+6/4)0,4+(3+8/4)0,1+ +(4+10/4)0,1+(5+12/4)0,0+(6+14/4)0,0)0,005-0)
Theoretical nitrogen volume			0.79 · 9,725 + 0,01 · 1
trehatomic			98,2+20,4+30,1+4 0,1+50,0+6*0,0)
Theoretical volume water			0,01(0+0+298,2+30,0,4+30,1+50,1+60,0+70++0,1240)+0,0161
Volume water			2,14+0,0161(1,05-
The volume of smoke			2,148+ (1.05-1) · 9,47
Volumetric lobes Trehatomic	r RO 2, R H 2 O
Dry gas density at N.U.
Mass of combustion products			G g \u003d 0,7684 + (0/1000) + 1.306 · 1.05 · 9,47

Table 2.

The surface of heating	Temperature after heating surface, 0 s	H 0 B, KJ / M 3	H 0 g, kj / m 3	H b HOW, KJ / M 3
Top Camera a T \u003d 1.05 + 0.07 \u003d 1.12
Shirm steamer, a SPE \u003d 1,12 + 0 \u003d 1.12
Convective steamer, a KPE \u003d 1,12 + 0.03 \u003d 1.15
Water economizer a EK \u003d 1.15 + 0.02 \u003d 1.17
Air heater a VP \u003d 1.17 + 0.15 + 0.15 \u003d 1.47

Table 3.

The calculated value	Mostoz-outpound	Dimension		Calculation or justification	Result

Enthalpy theoretical volume of cold air at a temperature of 30 0 s				I 0 Kh.V. \u003d 1,32145 · 30 · 9,47
Entalpy of the outgoing gases			Accepted at a temperature of 150 0 s	Take on table 2
Loss of heat from mechanical non-payment of combustion				When burning gas loss from mechanical incompleteness of combustion
Placed heat per 1 kg. Fuels in
Warm loss with outgoing gases				q 2 \u003d [(2902,71-1,47 * 375.42) *
Warm loss from outdoor cooling				Determine in fig. 5.1.
Warm loss from chemical non-payment of combustion				Determine Table XX
KPD gross PO			h br \u003d 100 - (Q 2 + Q 3 + Q 4 + Q 5)	h br \u003d 100 - (6,6 + 0.07 + 0 + 0.4)
Fuel consumption by (5-06) and (5-19)				In pg \u003d (/) · 100
Estimated fuel consumption of software (4-01)				In p \u003d 9,14 * (1-0 / 100)

2.4. Thermal calculation of the heat chamber.

2.4.1 Determination of the geometric characteristics of the furnace.

When designing and operating boiler installations, the sealing device calculation is most often performed. During the calibration calculation of the furnaces according to the drawings, it is necessary to determine: the volume of the heat chamber, the degree of its shielding, the surface area of \u200b\u200bthe walls and the area of \u200b\u200bthe emission surfaces of heating, as well as the design characteristics of the pipes of the screens (pipe diameter, the distance between the pipe axes).

The calculation of the geometrical characteristics is given in Tables 4 and 5.

Table 4.

The calculated value	Mostoz-outpound	Dimension	Calculation or justification	Result
Front-line area			19,314, 2-4(3,14* *1 2 /4)
Square side wall			6,13625,7-1,93,1- (0,51,41,7+0,51,41,2)-2(3,14*1 2 /4)
Back Wall area			2(0,57,042,1)+
Square of a two-shield			2(6,13620,8-(0,51,4 1,7+0,51,41,2)-
Outlet window Fires
Burner
Fire width			according to constructive data
Active volume of the heat chamber

Table 5.

Name of the surface					by nomographer
Front wall
Side Walls
Two wave screen
Rear Wall
Gas window

Square shielded walls (excluding burners)

2.4.2. Calculation of firebox.

Table 6.

The calculated value	Mostoz-outpound	Dimension	Formula	Calculation or justification	Result
The temperature of combustion products at the outlet of the furnace			According to the design of the boiler.	Previously accepted depending on the combed fuel
Enhaulpia products of combustion				Accepted on Table. 2.
Useful heat dissipation in the firebox (6-28)				35590 · (100-0.07-0) / (100-0)
Degree of shielding software (6-29)			H ray / f st
Film screenshot coefficient			Accepted according to Table 6.3.	depending on the burned fuel
The thermal efficiency coefficient of screens (6-31)
Effective thickness of the emitted layer by
The coefficient of weakening rays of trothy gas gases (6-13)

The attenuation coefficient of rays with large particles (6-14)		1.2 / (1 + 1,12 2) · (2.99) 0.4 · (1.6 · 920 / 1000-0.5)
The coefficient characterizing the share of flopping volume filled with a luminous part of the torch	Accepted on page 38.	Depending on the proportion of the separation volume:
The absorption coefficient of the coaming environment of software (6-17)		1,175 + 0.1 · 0,894
Criterion of absorbing ability (criterion of buger) software (6-12)		1,264 · 0.1 · 5.08
Effective value of the bug criterion		1,6LN ((1,4 · 0.642 2 +0,642 +2) / (1.4 · 0.642 2 -0.642 +2))
The charlasticity parameter of the fuel gases by		11,11*(1+0)/(7,49+1,0)
Fuel consumption of tier burner

The level of the location of the torch axes in Yarusa software (6-10)		(2 · 2.28 · 5.2 + 2 · 2.28 · 9.2) / (2 · 2.28 · 2)
Relative level of burner by (6-11)	x g \u003d h g / h t
Coefficient (for gas-airing floors with a wall burner)		Take on page 40
Parameter software (6-26a)		0,40(1-0,4∙0,371)
The coefficient of conservation of heat by
Theoretical (adiabatic) combustion temperature		Accepted equal to 2000 0 s
The average total heat capacity of combustion products on page 41

The temperature at the outlet of the furnace is chosen correctly and the error was (920-911.85) * 100% / 920 \u003d 0.885%

2.5. Calculation of boiler steamers.

The convective surfaces of the heating of steam boilers play an important role in the process of obtaining steam, as well as the use of heat of combustion products, leaving the flue chamber. The effectiveness of the operation of convective surfaces of heating depends on the intensity of heat transfer of heat combustion products.

Combustion products transfer the heat of the outer surface of the pipe by convection and radiation. Through the wall of the pipe, heat is transmitted with thermal conductivity, and from the inner surface to a pair of convection.

Scheme of the steam of steam on boiler top steampersites:

Wallpapers, located on the front wall of the heat chamber, and occupies the entire surface of the front wall.

The ceiling superheater, located on the ceiling, passing through the fiberboard, shirm steamers and the upper part of the convective shaft.

The first series of shirmers, located in the rotary chamber.

The second series of shirm steamers, located in a swivel chamber after the first next.

Convective steamer with serial-mixed current and injecting vapor cooler, installed by the Korissechka, installed in the convective mine of the boiler.

After the gearbox pairs enters the steam collector and goes beyond the boiler unit.

Geometrical characteristics of steps

Table 7.

2.5.1. Calculation of a wall-mounted superheater.

Wall-mounted PP is located in the furnace, with its calculation, the heat perception will be determined as part of heat, given by products of combustion of the NPP surface with respect to the other surfaces of the furnace.

The calculation of the NPP is presented in Table No. 8

2.5.2. Calculation of the ceiling steamer.

Considering the fact that the PPP is located both in the furnace chamber and in the convective part, but perceived heat in the convective part after the SPP and under the brackets are very small in relation to the heat-perceived heat supply in the furnace in the furnace (about 10% and 30%, respectively (from the technical manual on the boiler TGM-84. The calculation of the PPP is carried out in Table No. 9.

2.5.3. Calculation of the shirm steamer.

The calculation of the SPP is carried out in Table No. 10.

2.5.4. Calculation of the convective steamer.

The calculation of the CAT is carried out in Table No. 11.

Table 8.

The calculated value	Mostoz-outpound	Dimension	Formula	Calculation or justification	Result
Surface area heating			From table 4.	From table 4.
Lighting surface of wall pp			From table 5.	From table 5.
Heat, perceived by the NPP				0,74∙(35760/1098,08)∙268,21
The increase in enthalpy couple in the NPP				6416,54∙8,88/116,67
Entalpy couple before NPP				Enthalpy of dry saturated steam at a pressure of 155 Ata (15.5 MPa)
Enthalpy couple in front of the ceiling steamer			I "PPP \u003d I" + DI NPP
Steam temperature in front of the ceiling steamer			From tables of thermodynamic properties of water and superheated steam	The temperature of the superheated steam at a pressure of 155 Ata and enthalpy 3085,88CH / kg (15.5 MPa)

The temperature after NPP is taken equal to the temperature of combustion products at the outlet of the furnace \u003d 911.85 0 C.

Table 9.

The calculated value	Mostoz-outpound	Dimension	Formula	Calculation or justification	Result
Surface surface of heating 1st PPP
Emipable Surface PPP-1			H l PPP \u003d F ∙ x.
Heat, perceived PPP-1				0,74(35760/1098,08)∙50,61
The increase in enthalpy couple in PPP-1				1224,275∙9,14/116,67
Entalpy couple after PPP-1			I`` PPP -2 \u003d I`` PPP + DI NPP
The increase in enthalpy vapor in the PPP under the bracket				About 30% of Di PPP
The increase in enthalpy couple in the PPP for the bracket			It is accepted pre-on regulatory methods for calculating the boiler TGM-84	About 10% of Di PPP
Enthapia Couple Before SPP			I`` PPP -2 + DI PPP -2 + DI PPP-3	3178,03+27,64+9,21
Steam temperature in front of the screen steamer			From tables of thermodynamic properties of water and superheated steam	The temperature of the superheated pair at a pressure of 155 Ata and enthalpy 3239.84CH / kg (15.5 MPa)

Table10.

The calculated value	Mostoz-outpound	Dimension	Formula	Calculation or justification	Result
Surface area heating			∙ d ∙ l ∙ z 1 ∙ z 2	3,14∙0,033∙3∙30∙46
Live cross section area for the passage of combustion products for (7-31)				3,76∙14,2-30∙3∙0,033
Temperature of combustion products after the brass				Pre-evaluate the final temperature
Enthalpy of combustion products before the SPP			Accepted on Table. 2:
Enthalpy of combustion products after the brass			Accepted on Table. 2.
Enthalpy of the air suctioned in the convective surface, at T B \u003d 30 0 s			Accepted on Table. 3.
				0,996(17714,56-16873,59+0)

The heat transfer coefficient	W / (m 2 × k)	Determine the nomogram 7
Amendment for the number of pipes in the course of combustion products software (7-42)			With the transverse wash the corridor beams
Amendment on the layout of a beam		Determine the nomogram 7	With the transverse wash the corridor beams
		Determine the nomogram 7	With the transverse wash the corridor beams
The coefficient of heat-giving convection from p / s to the surface of the nipper (formula in nomogram 7)	W / (m 2 × k)		75∙1,0∙0,75∙1,01
Total optical thickness of software (7-66)		(k g R p + k evil m) ps	(1,202∙0,2831 +0) 0,1∙0,628
The thickness of the emitting layer for the wiring surfaces by

The heat transfer coefficient	W / (m 2 × k)	Determine the nomogram -

tops in the area

chassal windows furnace

Coefficient		Determine the nomogram -
Heat transfer coefficient for disadvantaged flow	W / (m 2 × k)
	Distribution coefficient height heat height See Table 8-4
The heat obtained from the heat dissipation of the heating surface, adjacent to the output need window firebox
Preliminary enthalpy couple at the exit of the bracket by (7-02) and (7-03)
Pre-temperature steam at the outlet of the brass			Temp-RA overheated pair with pressure. 150 Ata
Coefficient of use			Choose in fig. 7-13
	W / (m 2 × k)

Coefficient of thermal efficiency Shirm			Determine from Table 7-5
Coefficient of heat transfer software (7-15V)	W / (m 2 × k)


The actual temperature of combustion products after the brass			Since q b and q t differ on (837,61 -780,62)*100% / 837,61 the calculation of the surface is not specified
Consumption of the steelectricel on page 80		0.4 \u003d 0.4 (0.05 ... 0.07) D
Medium enthalpy couple in the tract			0,5(3285,78+3085,88)
Enhatpia of water used for injection in steam		From the tables of thermodynamic properties of water and superheated steam at 230 ° C

Table 11.

The calculated value	Mostoz-outpound	Dimension	Formula	Calculation or justification	Result
Surface area heating				3,14∙0,036∙6,3∙32∙74
Live cross section for the passage of combustion products
Temperature of combustion products after convective PP			Pre-adopted 2 values	By the design of the boiler unit
Enhaulpia combustion products before gear			Accepted on Table. 2:
Enhaulpia combustion products after gearbox			Accepted on Table. 2.
Heat, given to combustion products by				0,996(17257,06-12399+0,03∙373,51) 0,996(17257,06-16317+0,03∙373,51)
The average speed of combustion products by
The heat transfer coefficient		W / (m 2 × k)	Determine the nomogram 8	With the transverse wash the corridor beams
Amendment for the number of pipes in the course of combustion products			Determine the nomogram 8	With the transverse wash the corridor beams
Amendment on the layout of a beam			Determine the nomogram 8	With the transverse wash the corridor beams
Coefficient taking into account the impact of changes in the physical flow parameters			Determine the nomogram 8	With the transverse wash the corridor beams
Coefficient of heat transfer convection from p / s to the heating surface		W / (m 2 × k)		75∙1∙1,02∙1,04 82∙1∙1,02∙1,04
Polluted wall temperature (7-70)
Coefficient of use			We accept on instructions on	For complex washed beams
The total heat transfer coefficient by		W / (m 2 × k)		0,85∙ (77,73+0) 0,85∙ (86,13+0)
The coefficient of thermal efficiency			Determine the table. 7-5
Coefficient of heat transfer by		W / (m 2 × k)
Preliminary enthalpy couple at the exit from the checkpoint by (7-02) and (7-03)
Pre-temperature steam after gearbox			From the tables of thermodynamic properties of overheated steam	Temp-RA overheated pair with pressure. 140 Ata
Temperature pressure software (7-74)
The amount of heat perceived by the heating surface of the software (7-01)				50,11 ∙1686,38∙211,38/(9,14∙10 3) 55,73∙1686,38∙421,56/(9,14 ∙10 3)
Active Heat Perceived in PPC			We accept on schedule 1
The actual temperature of the combustion products after the CAT			We accept on schedule 1	The schedule is built by QB and QT values \u200b\u200bfor two temperatures.
The increase in enthalpy couple in the checkpoint				3070∙9,14 /116,67
Entalpy couple after gearbox			I`` KPP + DI PPC
Couple temperature after gearbox			From tables of thermodynamic properties of water and superheated steam	The temperature of the superheated steam at a pressure of 140 Ata and enthalpy 3465.67 kJ / kg

Calculation Results:

Q p p \u003d 35590 kJ / kg - disposed of heat.

Q l \u003d φ · (q m - i't) \u003d 0.996 · (35565.08 - 17714,56) \u003d 17779,118 kJ / kg.

Q K \u003d 2011.55 kJ / kg - Heat-perception of the SPP.

Q PE \u003d 3070 KJ / kg - gearmosphere of the checkpoint.

The heat-perception of the NPP and the PPP is taken into account in Q L, since the NPP and the PPP are in the firebox of the boiler. That is, q NPP and Q RPP are included in Q l.

2.6 Conclusion

I made a calibration calculation of the TGM-84 boiler.

In the calibration of the heat calculation on the adopted design and the size of the boiler for the given load and the type of fuel, the water temperature, steam, air and gases on the boundaries between the individual heating surfaces, the efficiency, fuel consumption, consumption and steam velocity, air and flue gases are determined.

Tweet calculation is made to evaluate indicators of the economy and reliability of the boiler when working on a given fuel, identifying the necessary reconstructive measures, the choice of auxiliary equipment and the preparation of the starting materials for settlements: aerodynamic, hydraulic, metal temperature, pipe strength, the intensity of the ash volunteer aboutsa tub, corrosion, etc.

3. The list of literature used

Lipov Yu.M. Thermal calculation of the steam boiler. - Izhevsk: NIC "Regular and Chaotic Dynamics", 2001
Thermal calculation of boilers (regulatory method). -Spb: NGO CCTI, 1998
Technical conditions and instructions for the operation of the steam boiler TGM-84.

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Ministry of Energy and Electrification of the USSR

Main technical service management
Energy Systems

Typical energy characteristic
TGM-96B boiler when burning fuel oil

Moscow 1981.

This typical energy characteristic was developed by Soyucehenergo (Inzh. G.I. Gutsalo)

The standard energy characteristics of the TGM-96B boiler was prepared on the basis of thermal tests conducted by the Soyucenergo at the Riga CHP-2 and the Mediaztehenergo on CHP gas, and reflects the technically achievable cost of the boiler.

A typical energy characteristic can serve as a basis for compiling the regulatory characteristics of TGM-96B boilers when combing fuel oil.

application

. Brief feature of the equipment of the boiler installation

1.1 . Copper TGM-96B Taganrog Boiler Plant - gas-gas with natural circulation and P-shaped layout, designed to work with turbinesT. -100 / 120-130-3 and PT-60-130 / 13. The main calculated parameters of the boiler when working on fuel oil are shown in Table. .

According to TKZ, the minimum allowable load of the boiler under the circulation condition is 40% nominal.

1.2 . The furnace chamber has a prismatic form and in the plan is a rectangle with dimensions of 6080 × 14700 mm. The volume of the furnace chamber is 1635 m 3. The thermal voltage of the flue volume is 214 kW / m 3, or 184 · 10 3 kcal / (m 3 · h). Evapory screens are placed in the furnace chamber and on the front wall Radiation Wall Steam Steaver (RNP). In the upper part of the furnace in the rotary chamber there is a wide steamer (SPP). In the lowered convective mine, two packages of the convective steamer (CAT) and a water economizer (VE) are located consistently along the gases.

1.3 . The steam path of the boiler consists of two independent streams with a pair of crossing between the side of the boiler. The temperature of the superheated steam is regulated by the injection of its own condensate.

1.4 . On the front wall of the furnace chamber there are four two-flow gas-tank burners HF CKB-WTI. The burners are installed in two tiers on -7250 and 11300 mm with an angle of lifting to the horizon 10 °.

For the combustion of the fuel oil, ferry mechanical nozzles "titanium" with a nominal capacity of 8.4 t / h at a pressure of the fuel oil 3.5 MPa (35 kgf / cm 2). Pressure pressure on purge and sprayed fuel oil is recommended by a 0.6 MPa plant (6 kgf / cm 2). The steam consumption on the nozzle is 240 kg / h.

1.5 . The boiler installation is equipped with:

Two blowing fans of VDN-16-P capacity with a reserve of 10% 259 · 10 3 m 3 / h, pressure with a reserve of 20% 39.8 MPa (398.0 kgf / m 2), 500/250 kW and rotation frequency 741 / 594 rpm of each machine;

Two smokers of DN-24 × 2-0.62 GM with a reserve with a reserve of 10% 415 · 10 3 m 3 / h, pressure with a reserve of 20% 21.6 MPa (216.0 kgf / m 2), with a capacity of 800/400 kW and rotation frequency of 743/595 rpm of each machine.

1.6 . For the cleaning of convective surfaces of heating from sediments of ash, the project is provided for a fractional installation, for cleaning RVP - water washing and blasting with a ferry from a drum with a decrease in pressure in the throttling unit. The duration of the blowing of one RVP 50 min.

. Typical energy characteristics of TGM-96B boiler

2.1 . Typical energy characteristics of the TGM-96B boiler ( fig. , , ) Compiled on the basis of the results of thermal testing of boilers of the Riga CHP-2 and CHP gas in accordance with the instrumental materials and methodological instructions on the normalization of the feasibility of boilers. Characteristic reflects the average economy of the new boiler working with turbinesT. -100 / 120-130 / 3 and PT-60-130 / 13 at the following conditions adopted for the initial one below.

2.1.1 . In the fuel balance of power plants, burning liquid fuel, most of the fancy fuel oilM. 100. Therefore, the characteristic is composed of fuel oil.M 100 (GOST 10585-75 ) With characteristics:A p \u003d 0.14%, w p \u003d 1.5%, s p \u003d 3.5%, (9500 kcal / kg). All necessary calculations are made on the working mass of fuel oil.

2.1.2 . The temperature of the fuel oil in front of the nozzles is taken 120 °C ( t TL \u003d 120 ° C) based on the viscosity of fuel oilM. 100, equal to 2.5 ° W, according to § 5.41 PTE.

2.1.3 . The average annual temperature of cold air (t x.) At the entrance to the blowing fan is taken equal to 10 °C. Since mainly TGM-96B boilers are located in climatic areas (Moscow, Riga, Gorky, Chisinau) with an average annual air temperature close to this temperature.

2.1.4 . Air temperature at the entrance to the air heater (t VP) adopted equal to 70 °C. and constant when changing the load of the boiler, according to § 17.25 of the PTE.

2.1.5 . For power plants with transverse bonds, the temperature of the nutrient water (t P.V.) Before the boiler is made calculated (230 ° C) and constant when the boiler load changes.

2.1.6 . The specific heat consumption of the net on the turbine installation is adopted 1750 kcal / (kWh), according to thermal tests.

2.1.7 . The heat flux coefficient is accepted by changing the load of the boiler from 98.5% at a rated load to 97.5% with a load of 0.6D Nom..

2.2 . The calculation of the regulatory characteristic was carried out in accordance with the instructions of the "thermal calculation of boiler aggregates (regulatory method)", (M.: Energy, 1973).

2.2.1 . The efficiency of the gross boiler and heat loss with outgoing gases is calculated in accordance with the method described in the book Ya.L. Pecker "Heat engineering calculations for the above fuel characteristics" (M.: Energy, 1977).

where

here

α Wow = α " VE. + Δ α Tr.

α Wow - the excess air coefficient in the outgoing gases;

Δ α Tr. - the gazes in the gas path of the boiler;

So uh - The temperature of the outgoing gases behind the smoke.

The calculation of the temperature of the outgoing gases, measured in the experiments of thermal testing of the boiler and the regulatory conditions given to the conditions for constructing the regulatory characteristics (input parameterst X B., t "kf, t P.V.).

2.2.2 . Outlet air coefficient of an airpoint (for a water economizer)α " VE. It is accepted equal to 1.04 on the rated load and varying to 1.1 by 50% load according to thermal tests.

The decrease in the calculated (1.13) coefficient of an excess of air for a water economizer to adopted in the regulatory characteristic (1.04) is achieved properly conducting the flue regime according to the boiler's regime map, compliance with the PTE requirements for air supplies in the furnace and the gas tract and the selection of the nozzles set .

2.2.3 . Air shocks in the gas path of the boiler on the rated load are taken equal to 25%. With a change in the load of the air supplies are determined by the formula

2.2.4 . Heat losses from chemical non-fuel combustion (q. 3 ) Accepted zero, since during the testing of the boiler in excess airs adopted in a typical energy characteristic, they were absent.

2.2.5 . Heat loss from mechanical fuel combustion (q. 4 ) Adopted equal zero in accordance with the "Regulations on the coordination of the regulatory characteristics of the equipment and the estimated specific costs of fuel" (M.: SNTTI OrGRES, 1975).

2.2.6 . Heat losses in the environment (q. 5 ) When testing were not determined. They are calculated in accordance with the "method of testing boiler installations" (M.: Energy, 1970) by the formula

2.2.7 . The specific consumption of electricity to the nutritional electric pump PE-580-185-2 was calculated using the characteristic of the pump adopted from the technical conditions of Tu-26-06-899-74.

2.2.8 . The specific consumption of electricity on the thrust and blowing is calculated by electricity costs on the drive of blowing fans and the smoke, measured when conducting thermal tests and reduced to the conditions (Δ α Tr. \u003d 25%) adopted when drawing up the regulatory characteristics.

It has been established that with a sufficient density of the gas tract (Δ α ≤ 30%) The smokers provide a nominal load of the boiler at a low speed frequency, but without any stock.

Blowing fans on a low speed of rotation provide the normal operation of the boiler to loads 450 t / h.

2.2.9 . The total electrical power of the mechanisms of the boiler installation includes electric drive power: nutritional electric pump, smoke, fans, regenerative air heaters (Fig. ). The power of the electric motor of the regenerative air heater is accepted according to passport data. The power of electric motors of the smoke, fans and the nutritional electric pump is determined during the heat tests of the boiler.

2.2.10 . Specific heat consumption for air heating in the caloric installation is calculated with the heating of air in the fans.

2.2.11 . To the specific heat consumption for the own needs of the boiler installation, heat losses in the carriers, the efficiency of which are taken by 98%; On the steam blow of the RVP and the loss of heat with the steam blowing of the boiler.

Heat consumption for steam blowing RVP was calculated by the formula

Q hp = G PBD · i found · τ OBD · 10 -3. MW. (Gkal / Ch)

where G PBD \u003d 75 kg / min in accordance with the "Current standards of steam and condensate for their own needs of the power units 300, 200, 150 MW" (M.: SNTTI OrGRES, 1974);

i found = i. couple \u003d 2598 kJ / kg (kcal / kg)

τ OBD \u003d 200 min (4 apparatus with a rejoice duration of 50 min when turned on within 24 hours).

Heat consumption with the blowing of the boiler was calculated by the formula

Q Prod. = G Prod · i K.V. · 10 -3. MW. (Gkal / Ch)

where G Prod = PD Nome.10 2 kg / ch

P \u003d 0.5%

i K.V. - enthalpy of boiler water;

2.2.12 . The procedure for conducting tests and the choice of measuring instruments used in tests were determined by the "method of testing boiler installations" (M.: Energy, 1970).

. Amendments to regulatory

3.1 . To bring the basic regulatory indicators of the boiler to the changed conditions of its operation within the permissible limits of deviation of the parameter values, amendments in the form of graphs and digital values \u200b\u200bare given. Amendments K.q. 2 In the form of graphs, shown in Fig. , . Amendments to the temperature of the outgoing gases are shown in Fig. . In addition to those listed, amendments are presented to change the heating temperature of the fuel oil supplied to the boiler, and to change the temperature of the nutrient water.

3.1.1 . The amendment to change the temperature of the fuel oil supplied to the boiler is designed to influence the change TO Q.on the q. 2 by formula

^ TECHNICAL TASK
"Device sampling of the outgoing gases of the NGRES boilers"

TABLE OF CONTENTS:

1 subject 3.

^ 2 General Description of the object 3

3 Volume of delivery \\ performance of service \\ provision of services 6

4 Specifications 11

5 Exceptions \\ Restrictions \\ Obligations for the provision of works \\ Supply \\ services 12

6 Tests, Acceptance, Commissioning 13

^ 7 Application list 14

8 Safety Requirements for Work 14

9 Environmental Protection Requirements Contract Organizations 17

^ 10 Alternative offers 18

1Pedmet

In accordance with the Environmental Program of JSC Enel OGK-5 for 2011-2015, the Branch "Nevinnomysskaya GRES" of JSC Enel OGK-5, you need the following:

Determination of the actual magnitude of the concentration of nitrogen oxides, carbon monoxide, methane at different loads and different modes of operation of TGM-96 boilers (boiler number 4) instrument park artist.
Determination of the density of the distribution of nitrogen dioxide on the convective surface area in the control section.

3. Evaluation of reducing the formation of nitrogen oxides by applying regime measures and changes in the feasibility performance of boilers ( definitions of efficiency of applying modest events).

4. Development of proposals for the use of low-cost reconstructive events aimed at reducing nitrogen oxide emissions.

2-General Description of the object

General

The Nevinnomyssian State District Electrical Station (NGRES) with a project capacity of 1340 MW is intended to cover the needs for the electrical energy of the North Caucasus and supplying the thermal energy of enterprises and the population of the city of Nevinnomyssk. Currently, the installed capacity of the Nevinnomyssk GRES is 1700.2 MW.

GRES is located on the northern outskirts of the city of Nevinnomyssk and consists of thermal power plants (CHP), condensation power units of open layout (block part) and vapor-gas installation (PSU).

Full name of the object: Branch "Nevinnomysskaya GRES" of the Open Joint-Stock Company "Enel Fifth Generating Company of the Wholesale Electricity Market" in Nevinnomyssk of the Stavropol Territory.

Location and postal address: Russian Federation, 357107, Nevinnomyssk, Stavropol Territory, Energy Street, House 2.

^ Climatic conditions

Climate: moderate continental

The climatic conditions and the ambient air parameters in this area correspond to the location of GRES (Nevinnomyssk) and are characterized by the data of the table 2.1.

Table 2.1 Climatic data of the region (Nevinnomyssk from SNiP 23-01-99)

edge, point	Outdoor temperature, hail. FROM
	Outdoor temperature, middle average, hail. FROM
	I.	II.	III	IV.		V.	VI		VII	VIII.		IX	X.	XI		XII.
Stavropol.	-3,2	-2,3	1,3	9,3		15,3	19,3		21,9	21,2		16,1	9,6	4,1		-0,5
					Less 8						Less than 10
Medium-annual	The coldest five-day security of 0.92				Continue, day.			Average temperature, hail. FROM			Continue, day				Average temperature, hail. FROM
9,1	-19				168			0,9			187				1,7

The long-term average air temperature of the coldest winter month (January) is minus 4.5 ° C, the roast (July) + 22.1 ° C.

The duration of the period with sustainable frosts is about 60 days,

Wind speed, the repeatability of which does not exceed 5%, is equal to 10-11 m / s.

The dominant direction of the wind is eastern.

Annual relative humidity is 62.5%.

^ Characteristic and brief description of the boiler unit TGM - 96.

A gas-gas boiler TGM-96 Taganrog Boiler Plant Single-backed, with natural circulation, 880 t / h Steel capacity with the following parameters:

Pressure in the drum - 155 Ati

Pressure for main steam valve - 140 ATI

The temperature of the superheated pair - 560s

Petroleum temperature - 230 ° C
^ Main calculated data of the boiler when burning gas:
WORK PRESSUE T / HA 480

Pressure superheated pair kg / cm 2 140

The temperature of the superheated pair С 560

Petroleum temperature С 230

Cold air temperature before RVV С 30

Hot air temperature С 265
^ Fire characteristics

The volume of the furnace chamber M 3 1644 The heat change of the coil volume of Kcal / m 3 h 187,10 3

Voice consumption of fuel BP Nm 3 / h t / h 37.2.10 3

^ Para

Over Wall Paper Sterer Veltel 391 Before Extreme Shirms С 411

After the extreme shirts С 434 after the average shirts С 529 after the input packets of the convective steamer С 572

After the weekend packages of the convective p / n. С 560.

^ Gas temperature

For shirms С 958

For convective p / p c 738 for water economizer С 314

Outgoing gases С 120
The contracting of the boiler is a shaped, with two convective mines. The absorbent chamber is shielded by evaporative pipes and panels of the radiation superheater.

The ceiling of the Horizontal Sheep of the Rotary Camera is shielded by panels of the ceiling superimension. In the rotary chamber and the transition gas duct is a wide superimension.

The side walls of the rotary chamber and the spaces of convective shafts are shielded by the wall-mounted water economizer panels. In convective mines there is a convective steamer and a water economizer.

Convective steamer packages are attached on the outboard pipes of a water economizer.

The convective water economizer packages are based on air-cooled beams.

The water arriving in the boiler passes consistently suspended pipes, capacitors, a wall water economizer, a convective water economizer and enters the drum.

Couples from the drum enters 6 panels of a wall radiation superheater, from radiation enters the ceiling, from the ceiling to the wiring, from the screen to the ceiling and wall and then into a convective steamer. The pair temperature control is carried out by two injections of their own "condensate. The first injection is carried out on all boilers in front of the shirm steamer, the second on the K-4.5 and the third injection on the 5A injections between the input and output packages of the convective P / P, the second injection on the K-5A in the dissection of the extreme and medium-sized shots.

For heating the air required for fuel combustion, three regenerative air heater located on the back side of the boiler are installed. The boiler is equipped with two wind turbine fans VDN-26. II and two smoke-type DN26x2a.

The boiler chamber of the boiler has a prismatic form. Sizes of the furnace chamber in the light:

Width - 14860 mm

Depth - 6080 mm

The volume of the heat chamber is 1644 m 3.

Visible thermal voltage of the flue volume with a load of 480 tons per hour: - on gas 187.10 3 kcal / m 3 hour;

On fuel oil - 190.10 3 kcal / m 3 hours.

The furnace chamber is completely shielded by evaporative pipes dia. 60x6 with a pitch of 64mm and overheating pipes. To reduce the sensitivity of circulation to various thermal and hydraulic skews, all evaporating screens are partitioned, and each section (panel) is an independent circulation circuit.

The burner apparatus of the boiler.

The name of the quantities is one. measured. G and s Mazut

1. Nominal productivity. kg / hour 9050 8400
2. Air speed m / s 46 46
3. Gas expiration rate M / s 160 -
4. Burner resistance kg / m 2 150 150

by air.
5. Maximum manufacturer of NM 3 / hour 11000

gas
6. Maximum manufacturer- kg / hour - 10000

fuel oil.
7. Admissible limit adjustment -% 100-60% 100-60%

loading. from Nomin. from Nomin.
8. Gas pressure in front of the burner. kg / m 2 3500 -
9. Pressure fuel oil before burning - kgf / cm 2 - 20

coy.
10. Minimum decrease in Dav- - - 7

fuel oil with low.

load.

Brief description of the burner - type of gmg.
The burners consist of the following nodes:

a) snail intended for uniform flow of peripheral air to guide shovels,

b) guide blades with a register installed at the inlet to the camera peripheral supply of air. Guide blades are intended for turbulization of the flow of peripheral air and change its twist. An increase in its twist by covering the guide blades increases the taksility of the torch and reduces its long-distance and vice versa,

c) Cameras of the central supply of air formed from the inside of the surface of the pipe dia. 219 mm, which simultaneously serves to install a working fuel oil in it and from the outside of the surface of the pipe dia. 478 mm, which is simultaneously the inner surface of the camera at the outlet in the furnace, has 12 fixed guide blades (socket), which are intended for turbulization of the flow of air sent to the center of the torch.

d) peripheral air supply chambers, formed from the inside of the surface of the pipe dia. 529 mm, which is simultaneously the outer surface of the central gas supply chamber and from the outside of the surface of the pipe dia. 1180mm, which is simultaneously the inner surface of the peripheral gas supply chamber,

e) Cameras of the central gas supply chamber with a number of nozzles from the exit side to the furnace. 18 mm (8 pcs) and a series of holes dia. 17 mm (16 pcs). Nozzles and holes are located in two rows around the circumference of the outer surface of the chamber,

e) Peripheral gas supply chambers with two rows of nozzles from the exit side of the exit. 25 mm in the amount of 8 pcs and dia. 14 mm in an amount of 32 pcs. Nozzles are located along the circumference of the inner surface of the chamber.

For the possibility of regulating air flow on burners:

Shared Sewber on the air supply to the burner,

Sewber on the peripheral air supply,

Sewber on central air supply.

To prevent air supply to the furnace, a flap is installed on the fuel oil guide tube.

Description of the steam boiler TGM-151-B

Laboratory work number 1

in the course "Boiler installations"

Performed: Matyushina E.

Shokhanova Yu.

Titova E.

Group: TE-10-1

Checked: Shatsky Yu. V.

Lipetsk 2013.

1. The purpose of the work ................................................................................................3

2. Brief characteristic of the boiler TGM-151-B ..........................................................3

3. Boiler-auxiliary equipment .................................... ... .................. .4

4. Characteristics of the equipment .................................... ... ................................. 7

4.1 Technical characteristic ..........................................................7

4.2 Description Design ..................................................................7

4.2.1 Fake camera ............................................................... ... .7

4.2.2 Steamer ........................ ... .................................... .8

4.2.3 Device for regulating the temperature of the superheated pair ..........................................................................................................................................................................11

4.2.4 Water Economyzer ..................... ... ... ... ........................ ... ... 11

4.2.5 Air heater .............................. ... .................. .. ... .. ... 12

4.2.6 Supporting devices ................................................................. .. ... 12

4.2.7 Safety valves ..................................................... 13

4.2.8 The burner devices .............................................................13

4.2.9 Drum and separation devices .......................................... 14

4.2.10 Frame of the boiler ............ .... ....................................................................... 16

4.2.11. Cutting the boiler ..................................................................................................

5. Safety technique during work ..............................................16

Bibliographic list ....................................................................................... ... 17

1. The purpose of the work

Heat engineering tests of boiler plants are carried out to determine the energy characteristics that determine their regime indicators depending on the load and type of fuel, identifying their operational features and disadvantages of the structure. To enjoy students of practical skills, this work is recommended in production conditions on the current installations of thermal power plants.

The aim of the work is to familiarize students with the organization and methodology for carrying out the balance tests of the boiler unit, determining the number and selection of measurements of the parameters of the boiler operation parameters, with the requirements for the installation of instrumentation, with the method for processing test results.

Brief description of the boiler TGM-151-B

1. Registration number number 10406

2 Plant Manufacturer Taganrog Boiler

plant "Red Boelshchik"

3. Parpiperbility 220 t / h

4. Couple pressure in the drum 115 kg / cm 2

5. Nominal pressure of superheated steam 100 kg / cm 2

6. The temperature of the superheated steam 540 ° C

7. Nutrient temperature 215 ° C

8. Hot air temperature 340 ° C

9. Water temperature at an exit of economizer 320 ° C

10. The temperature of the outgoing gases is 180 ° C

11. Fuel main cocotomous gas and natural gas

12 fuel reserve fuel oil

Boiler-accessories.

1. Type of smoke: d-20x2

Productivity 245 thousand m3 / h

Dimex pumped - 408 kgf / m2

Power and type of electric motor №21 500 kW A13-52-8

№22 500 kW A4-450-8

2. Type of blowing fan: VDN -18-11

Productivity - 170 thousand m / h

Pressure - 390 kgf / m2

Power and type of electric motor №21 200 kW AO-113-6

№22 165 kW GAMT 6-127-6

3. Type of burner: Turbulent

Number of burners (natural gas) - 4

The number of burners (cocoomed gas) 4

Minimum air pressure- 50mm V.ST

Air flow through the burner - 21000 nm / hour

Air temperature in front of the burner - 340 s

Natural gas consumption over burner- 2200 nm / hour

Cockewed gas consumption over burner - 25000 Nm / hour

Figure 1. TGM-151-B gas-air boiler 220 t / h, 100 kgf / cm ^ 2 (longitudinal and transverse cuts): 1 - drum, 2 - remote separation cyclone, 3 - Fuel chamber, 4 - fuel burner, 5 - Shirm, 6 - convective part of the steamer, 7 - economizer, 8 - regenerative air heater, 9 - shotgun (cyclone) shot blasting, 10 - bunker of shot blasting unit, 11 - box, discharge flue gases from economizer to air heater, 12 - gas box to Dymososos, 13 - a root of cold air.

Figure 2. General scheme of the boiler TGM-151-B: 1 - drum, 2 - remote separation cyclone, 3 - burner, 4 - on-screen pipes, 5 - sink pipes, 6 - ceiling steamer, 7 - radiation wide steamer, 8 - convective Shirm Steamer, 9 - 1st Stage of Convective Steamer, 10 - 2nd Stage of Convective Steamer, 11 - 1st injection pairochholder,

12 - vaporochilder of the 2nd injection, 13 - Water economizer packages, 14 - regenerative rotating air heater.

4. Characteristics of equipment

4.1 Technical characteristics

Boiler TGM-151 / B gas-magazin, vertically water-tube, single-backed, with natural circulation and three-stage evaporation. The boiler is made by the Taganrog Boiler Plant "Red Boiler".

The boiler unit has a P-shaped layout and consists of a fiber chamber, a swivel camera and a lower convective shaft.

In the upper part of the furnace (at the outlet of it), the wiring part of the steamer is placed in the rotary chamber, in the hydrogen gas duct - the convective part of the steamer and the economizer. Behind the convective gas station, two regenerative rotating air heater (RVR) were installed.

Operational indicators, parameters:

4.2 Description Design

4.2.1 Fake camera

The furnace chamber has a prismatic form. The volume of the coil chamber is 780 m 3.

The walls of the furnace chamber are shielded with pipes Ø 60x5 made of steel 20. The ceiling chamber ceiling is shielded by the ceiling steamer pipes (Ø 32x3,5).

The front-line screen consists of 4 panels - 38 pipes in extreme panels and 32 pipes on average. The side screens have three panels - each by 30 pipes. Rear screen has 4 panels: two extreme panels consist of 38 pipes, medium - from 32 pipes.

To improve the flushed with flue gases, shirm and the protection of the rear screen cameras from radiation, the rear screen pipes in the upper part form a protrusion into the firebox with a flight of 2000 mm (along the pipe axes). Thirty-four pipes do not participate in the formation of departure, but are carriers (9 pipes in extreme panels and 8 in medium).

The on-screen system, except the rear screen, is suspended for the upper chambers through garters to the ceiling overlap metal structures. The rear screen panels are suspended with 12 heated outboard pipes 0 133x10 to ceiling overlap.

The rear screens panels in the lower part form a slope to the front wall of the furnace with a slope of 15 ° to horizontally and form a cold under, covered by shamot and chrome-plated.

All windbox screens are freely expanding down.

Figure 3. Sketch of the gas-powered boiler chamber.

Figure 4. Screen surface heating of the boiler: 1 - drum; 2 - upper collector; 3 - squeeze bunch of pipes; 4 - lifting evaporative beam; 9 - lower rear screen manifold; 13 - blended rear screen pipes; 14 - Heated screen with a torch of burning fuel.

4.2.2 Steamer

The boiler steamer consists of the following parts (in the course of steam): ceiling superheater, wide steamer and convective steamer. Ceiling superheater shields the ceiling of the furnace and the rotary chamber. The steamer is made of 4 panels: in the extreme panels of 66 pipes, in the middle panels of 57 pipes. Pipes Ø 32x3.5 mm made of steel 20 installed in 36 mm increments. The input chambers of the ceiling steamer are made Ø 219x16 mm made of steel 20, the output Ø 219x20 mm made of steel 20. The surface of the heating of the ceiling steamer is 109.1 m 2.

Ceiling steamer pipes with welded slats are attached to special beams (7 rows along the length of the ceiling steamer). The beams, in turn, are suspended with the help of thrust and suspension to the beams of ceiling structures.

The wide steamer is located in a horizontal connecting gas duct of the boiler and consists of 32 shirm, located in two rows along the gases (the first row - radiation wide, the second - convective screen). Each Shirma has 28 coils from the pipe Ø 32x4 mm from steel 12x1mf. Step between pipes in Shirma 40 mm. Screens are installed in 530 mm increments. The total heating surface of the SwiM is 420 m 2.

The mounting of coils with each other is carried out with the help of a comb and clamps (6 mm thick made of steel grade x20n14c2), installed in height in two rows.

The convective horizontal type steamer is located in a low-speed convective mine and consists of two steps: upper and lower. The lower step of the steamer (first in the course of steam) with the surface of heating 410 m 2 - the countercurrent, the upper step with the heating surface of 410 m 2 - direct-flow. The distance between the steps of 1362 mm (along the pipe axes), the height of the stage is 1152 mm. The step consists of two parts: the left and right, each of which consists of 60 dual three-strand coils located in parallel to the front of the boiler. The coils are made of pipes Ø 32x4 mm (steel 12x1mf) and installed in a checker manner with steps: longitudinal - 50 mm, transverse - 120 mm.

Coils with the help of racks rely on the support beams cooled by air. Remons of coils is carried out with the help of 3 rows of a comb and strips with a thickness of 3 mm.

Figure 5. Fastening the convective pipe package with horizontal coils: 1-Power beams; 2 - pipes; 3 - Racks; 4 - bracket.

The steam movement on the steamer occurs by two non-mixing flows, symmetrically relative to the axis of the boiler.

In each of the streams of steam moves as follows. The saturated pairs of the boiler of the boiler for 20 pipes Ø 60x5 mm goes into two ceiling operating reserves Ø 219x16 mm. Next, the steam moves along the ceiling pipes and enters two output chambers Ø 219x20 mm, located at the rear wall of the convective gas plant. From these cameras, four pipes Ø 133x10 mm (steel 12x1mf), the pairs are sent to the input chambers Ø 133x10 mm (steel 12x1mf) of the width of the convective part of the wide steamer. Next, to the extreme shirms of the radiation part of the wide steamer, then in the intermediate chamber Ø 273x20 (steel 12x1mf), from which the pipes Ø 133x10 mm are sent to four meanwort by the radiation part, and then four average broad-part shots.

After the Shirm pairs of four pipes Ø 133x10 mm (steel 12x1mf) enters the vertical pairochholder, passing which four pipes Ø 133x10 mm into two input chambers of the lower countercurrent stage of the convective steamer. Having passed the countercurrent, the bottom stage coils, the pairs enters two output chambers (the diameter of the input and output chambers Ø 273x20 mm), of which four pipes Ø 133x10 mm are sent to the horizontal vaporochholder. After the steamer, the pairs arrives at four pipes Ø 133x10 mm in the input collectors Ø 273x20 mm of the upper step. Having passed forward flow, the top stage coils, the steam falls on the output collectors Ø 273x26 mm, of which four pipes are sent to the steaming chamber ø 273x26 mm.

Figure 6. Scheme of the TGM-151-B Boiler Steamer: A - Ceiling Panels and Shirm Diagram, B - Convective Pipe Package Scheme, 1 - Drum, 2 - Ceiling Pipes (only one of the pipes), 3 - Intermediate manifold between Ceiling panels and shirms, 4 - screen, 5 - vertical steamer, 6 and 7 - respectively, the lower and upper convective tube packages, 8 - horizontal vaporochylatener, 9 - steam collector, 10 - safety valve, 11 - air conditioner, 12 - overheated steam outlet .

4.2.3 Device for regulating the temperature of the superheated steam

The temperature control of the superheated steam is carried out in the vapor coolers by injection of condensate (or feed water) into the flow of steam passing through them. On the path of each pair flow, two injection type pairoolels are installed: one vertical - behind the shirt surface and one horizontal - at the first stage of the convective steamer.

The housing of the pairochholder consists of an injection, manifold and output chamber. Inside the case are hosted by injection devices and a protective shirt. The injection device consists of nozzles, diffuser and pipes with a compensator. The diffuser and the inner surface of the nozzle form the Venturi tube.

In a narrow cross section of the nozzle, 8 holes Ø 5 mm on the II pairochholder and 16 holes Ø 5 mm on the I vaporochlastitel are drilled. Couples through 4 holes in the housing of the paro detergent enters the injection chamber and enters the nozzle of the Venturi tube. Condensate (nutrient water) is supplied to the ring channel of the Z 60x6 mm pipe and is injected into the venturi tube cavity through the Ø 5 mm holes located around the nozzle circle. After the protective shirt, the pairs enters the output chamber, from where the four pipes are given to the superheater. The injection chamber and the output chamber are made of pipe Ø g 3x26 mm, the collector from the pipe Ø 273x20 mm (steel 12x1mf).

Water economizer

The steel coating economizer is located in the hydrocarbon gas duct on the packages of the convective steamer (in terms of gases). In height, the economizer is divided into three packs with a height of 955 mm each, the distance between the packages is 655 mm. Each package is made of 88 twined three-detection coils Ø 25x3.5 mm (steel20). The coils are located in parallel to the front of the boiler in a checker order (longitudinal step 41.5 mm, a transverse step of 80 mm). The surface of the heating of the water economizer is 2130 m 2.

Figure 7. Sketch of the economizer with a double-sided-parallel front of the location of coils: 1 - drum, 2 - water supply pipes, 3 - Economyzer, 4 - input collectors.

Air heater

The boiler unit is equipped with two regenerative rotating air heaters of the RVV-41M type. The air heater rotor consists of a linel Ø 4100 mm (2250 mm high), hubs Ø 900 mm and connecting the hub with a shell of radial ribs separating the rotor into 24 sectors. The rotor sectors are filled with heating corrugated steel sheets (packing). The rotor is driven by an electric motor with a gearbox and rotates at a speed of 2 turns per minute. The total surface of the heating of the air heater is 7221 m 2.

Figure 8. Regenerative air heater: 1 - Rotor shaft, 2 - bearings, 3 - electric motor, 4 - packing, 5 - outer casing, 6 and 7 - radial and peripheral seal, 8 - air leakage.

True devices

To evacuate flue gases, the boiler unit is equipped with two smoke-sided d-20x2 type soaps. The drive of each smoke is an electric motor with a power of n \u003d 500 kW, with a speed of N \u003d 730 revolutions per minute.

Performance and complete pressure of the chymosms are given for gases at a pressure of 760 mm Hg. Art and gas temperature at the inlet to the smoke 200 ° C.

Nominal parameters with the largest kp. η \u003d 0.7

For feeding the air required for combustion, the boiler No. 11 is equipped with two blowing fans (DV) type VDN-18-II with a capacity of Q \u003d 170000 m 3 / hour, full pressure of 390 mm water. Art. At the temperature of the working medium of 20 ° C. The drive of the fans of the boiler number 11 is the power of the power: the left - 250 kW, the speed of rotation n \u003d 990 rpm, the right - 200 kW, the speed of rotation n \u003d 900 rpm.

4.2.7 Safety valves

On the boiler №11 on the steam chamber installed two pulsed safety valves. One of them is controlled - with a pulse from a steaming chamber, the second is a working - a pulse from the boiler borax.

The control valve is configured to trigger when the pressure increases in the steaming chamber to 105 kgf / cm 2. The valve closes when the pressure is reduced to 100 kgf / cm 2.

The working valve opens with an increase in pressure in the drum to 118.8 kgf / cm 2. The valve closes with a decrease in pressure in the drum to 112 kgf / cm 2.

4.2.8 Torch devices

The front wall of the flue chamber is installed 8 gas-suite burners located in two tiers of 4 burners in each tier.

Combined burners are made two-way over the air.

Each burner of the lower tier is calculated on the burning of the cockedomed mixture of gases and fuel oil, separate burning of coke or domain gases in the same burners. Coxodomed mixture is supplied through the Ø 490 mm collector. On the axis of the burner there is a pipe Ø 76x4 for the installation of mechanical spraying fuel oil nozzle. The diameter of ambrusuras 1000 mm.

Each of the 4 burners of the upper tier is designed for burning natural gas and fuel oil. Natural gas is supplied to the collector Ø 206 mm through 3 rows of holes Ø 6, 13, 25 mm. The number of holes of 8 in each row. The diameter of the ambrusura is 800 mm.

4.2.9 Drum and separation devices

The drum is installed on the boiler with a diameter of 1600 mm, the wall thickness of the drum 100 mm, steel sheet

The boiler has a three-step evaporation scheme. The first and second steps of evaporation are organized inside the drum, the third in remote cyclones. The first stage compartment is located in the middle of the drum, two compartments of the second stage - along the ends. Inside the drum, water volumes of saline compartments are separated from the pure compartment by partitions. A nutrient water for salt compartments of the second stage is the boiler water of the pure compartment, which goes through the holes in the separation intersectoral partitions. Nutrient water for the third stage of evaporation is the boiler water of the second stage.

Continuous purge is carried out from the water volume of remote cyclones.

Nutrient water, coming from the economizer in the drum, is divided into two parts. Half of the water in the pipes is sent to the water space of the drum, the second half is entered into the longitudinal dialing collector, it comes out of it through the holes and spreads over a hole-leaf, through which saturated steam passes. When passing a pair through a layer of nutrient water, it is flushing it, i.e. Cleaning steam from salts contained in it.

After washing a pair, nutritious water in the boxes merges into the water space of the drum.

A steaming mixture, entering the drum, passes through 42 separation cyclones, of which: 14 are located on the front side of the drum, 28 - on the rear side of the drum (including 6 cyclones stopped in salt compartments of stepped evaporation).

In cyclones, coarse, preliminary separation of water and steam are carried out. Outproed water flows into the lower part of cyclones, under which pallets are installed.

Directly over the cyclones are the louvral shields. Passing through these shields and through a hole-leaf, the pairs are sent to the final drainage into the upper louvral shields, under which a hole-leaf is located. The average level in the pure compartment is located 150 mm below its geometric axis. The upper and lower allowable levels, respectively, 40 mm above and below average. The water level in salty compartments is usually located lower than in a clean compartment. The difference in water levels in these compartments increases with an increase in the load of the boiler.

Entering the phosphate solution into the drum is made in a pure compartment of step evaporation along the pipe located along the bottom of the drum.

In the pure compartment there is a pipe for emergency drain of water in the event of an excessive increase in its level. In addition, there is a line with a valve connecting the space of the left remote cyclone with one of the lower rear screen chambers. When the valve is opened, the movement of the boiler water from the salty compartment of the third stage in the pure compartment, due to which it is possible, if necessary, reduce the multiplicity of water content in the compartments. The alignment of salt content in the left and right salty compartments of the third stage of evaporation is ensured by the fact that the pipe that directs the boiler water into the lower screen chamber of the opposite salt compartment comes from each salted remote compartment.

Figure 11. Scheme of three-stage evaporation: 1 - drum; 2 - remote cyclone; 3 - lower collector of the circulation circuit, 4 - steam generating pipes; 5 - sink pipes; 6 - supply of nutrient water; 7 - removal of purge water; 8 - water supply tube from drum in cyclone; 9 - par pilot tube from cyclone in the drum; 10 - steam trucks from the aggregate; 11- internal partition.

4.2.10 Kotla's frame

The boiler frame consists of metal columns associated with horizontal beams, farms, disconse and serves to perceive the loads from the weight of the drum, the surfaces of heating, irrigation, comprehension of service, gas pipelines and other boiler elements. The columns of the boiler frame are rigidly attached to the iron foundation of the boiler, the bases (shoes) of the columns are poured with concrete.

4.2.11 Outlook

The spits of the clutches are layers of refractory and insulating materials that are attached using brackets and attractions to steel frame structures with casing sheets.

In the shields in series from the gas side are located: layers of refractory concrete, cooded mats layer of sealing coating. The thickness of the carriage chamber is 200 mm, in the area of \u200b\u200bthe two lower economizer packages - 260 mm. The irrigation of the feed at the bottom of the furnace chamber is cut off the pipe. With heat lengthening of the screens, this icon is moved along with pipes. Between the mobile and fixed parts of the furnace chamber, there is a temperature seam, compacted with a water shutter (hydraulic assembly). In the dressing there are holes for climbing, hatches and hatches.

5. Safety in working

On the territory of the power plant, students are subject to all regulations and safety regulations operating in the enterprise.

Before the start of the test, the representative of the company conducts briefing on the procedure for conducting a test and safety regulations with a record in the relevant documents. During testing students, it is forbidden to interfere with the actions of the service personnel, to disconnect the instruments on the control panel, open the glands, hatch, lazes, etc.

Bibliographic list

Sidelkovsky L. N., Yurev V.N. Boiler installations of industrial enterprises: a textbook for universities. - 3 - E ed., Pererab. - M.: Energoatomizdat, 1988. - 528С., IL.
Kovalev A.P. and others. Steam generators: Textbook for universities / A. P. Kovalev, N.S. Lelleev, T.V. Vilensky; Under total. ed. A. P. Kovalev. - M.: Energoatomizdat, 1985. - 376 p., Il.
Kiselev N.A. Boiler plants, training manual for preparation. Working in production - 2nd ed., Pererab. and add. - M.: Higher School, 1979. - 270s., Il.
Deev L.V., Balahnichev N.A. Boiler plants and their maintenance. Practical classes for PTU. - M.: Higher School, 1990. - 239c., Il.
Maclar M. V. Modern boiler aggregates TKZ. - 3 ed., Pererab. and add. - M.: Energia, 1978. - 223c., Il.