How to rinse the gas boiler heat exchanger at home. Washing plate heat exchangers: how to make it right? How to clean the plate heat exchanger
The problems of cleaning the internal surfaces of thermal boilers by one boilers is not limited. Worst of all in the heat and power is the heat exchangers. They have a rather complicated design and their service and cleaning causes the biggest questions. It is always more profitable to use soft water, then the heat exchangers do not have to clean. But there is no such possibility.
Chemical flushing of lamellar heat exchangers: service cost
The most common way to clean the boiler houses from the scale formed is also the elimination of the resulting plaque with a strong chemical solution, based on some acid.
If low-quality water is used in the boiler system, chemical flushing of lamellar heat exchangers And boilers will be the correct condition for normal operation of the system. It does not matter which boiler works. It can use gas as fuel, can use firewood, it can get warm from electricity through a heat exchanger, but in any of the three cases, scale on the walls of the boiler will be formed if the water used in the system is rigid. What is now the cost of washing and do it cost it with your own hands or contact the specialists?
On the walls of the equipment, any impurities dissolved in water and capable react during heating are settled. Accordingly, working with crude water is a very big risk for equipment. On the walls of the same lamellar heat exchanger, the following harm in the most heated place is settled:
With centralized water supply, only one type of impurity is most likely - limestriness. Although sometimes wear of equipment leads to the formation of such impurities as ferrunce and bacterial infection. But it is rather an exception than the rule. The plate heat exchanger is subject to all these risks, because It is he who heats the water, the lime is preferred to be deposited on heated surfaces. For the minimum protection of the inner surfaces, both the boiler and the heat exchanger, use washing with chemical solutions.
Although there are two kinds of flushing:
· Mechanical;
· Chemical.
In severe cases, use an integrated approach. The cost of this approach ranges from 7,000 to 9000 rubles. For 1 flushing. The root cause of overpowering fuel, poor water heating in the boiler room is a surface with a dense lime bloom. Therefore, they need to monitor and eliminate the flare on time.
Chemical flushing of a plate heat exchanger is only part of the procedures for the chemical flushing of the boiler and its components. Chemical reaction is the basis of this kind of flushing. The flare must react to the solution and as a result soften or dissolve. In the future, wash the sediment will not be difficult. Thus, eliminate salts of limestone and turn the trivalent iron into a divalent, that is, sedimentary.
If there is no water treatment system in the boiler room, the flushing will be a mandatory element of the surface cleaning system of the heating system. It will be done on schedule and with certain frequency. And the farther, the period between flushing will be reduced. True, all this will end with the replacement of the boiler or / and the heat exchanger, because Any flushing or cleaning worsens surface condition.
Flushing can be preventive, and may be overhaul. Preventive is carried out at easy raid, in order to prevent it or soften. Capital flushing implies disassembly of equipment and soaking components in acidic solutions for quite a long period of time.
Acid flushing are also different. The first variety is the imbeption of the boiler and its components. This uses specialized equipment. So-called boosters. In the tank prepare reagents, then join the booster to the heat exchanger, creating a closed circuit. The acidic solution is heated and several times passed it through the heat exchange path. After the flask is dissolved, the spent solution is drained from the system and is washed several times with clean water, to eliminate the spent residues.
Bunders eliminate the harmful precipitate well, even in steam, at least in gas boilers. True, in the boosters for gas boilers, as a rule, the Tanes are not used. The flushing solution is heated in this case directly in the boiler or plate heat exchanger. However, the use of beans is still preferable, because The surface of the boiler and heat exchanger is less subjected to aggressive contact.
Washing can be different and the cost of the service is also, but aggressive acid is designed to eliminate lime or glandular deposits. Which are difficult to eliminate, even with the help of a filter, scrawls or mechanical intervention.
What acids are used for flushing? If the task is to protect or prevent deposit, you can rinse with citric acid solution. If the deposits are already there and sufficiently dense, then there are quite serious solutions. Sulfuric and hydrochloric acid in this case are most often used. Then can apply nitric or phosphoric acid. The choice of acid for the solution is completely dependent on the nature of pollution, density, etc. Special attention should be paid to the materials from which the boiler and the heat exchanger is made. Because Not every material can withstand the acid flushing.
Consequences of washing - and how are they necessary?
Why does the flushing of lamellar heat exchangers always loses with the usual softening and any water purification? The secret is really simple. Any element of a thermal system that does not have resistance to aggressive influences is in the risk area. Therefore, acid flushing is not how cannot be safe. You need to check all the elements for compatibility with acid. Any type of surface cleaning is the risk of damageing the surface.
The least corrosion-resistant equipment details are able to fully reduce the washing results on "no". In this regard, buy reagents and fluid better specially trained. They often contain certain passivators and inhibitors. Yes, and on the package is prescribed, which surfaces cannot be treated with similar solutions.
The greatest risk of chemical solutions is that the high degree of acidity can destroy the surface, and even the corrosionally resistant and tempered. Acid does not act selectively. It works clearly, powerfully and efficiently. Not dealing with that it is a surface or fall. She simply dissolves everything in its path. Worst of all acid flushing perceive metal spare parts of the heat exchanger. They are most susceptible to damage. And most importantly, such damage for themselves is still corrosive. One problem generates another.
When washing, even in a closed circuit, the reagent gradually loses its strength, and the solution needs an acid addition. The situation is complicated by the fact that pure acid is able to damage everything and everything. Therefore, flushing are made exclusively by specialists. And in the second, the correct solution can be compiled, based on the level of acid-alkaline balance. Indicator 4-5, it is the level of acidic solution for washing. When chemical washing, the indicator is 1-2. When washing, the pH level is measured. If the acid solution again began to show 1-2, then the lime bloom on the surfaces is almost dissolved and the system can already be washed with conventional water.
With collapsible flushing, the equipment parts are soaked in solution and specialized equipment for this are not used. Rather, mechanical equipment is going to move, which helps to eliminate the softened raid after washing the plate heat exchanger with their own hands. But for specific heat exchange equipment with mechanical cleaning surfaces should be especially careful.
If it is not necessary to disassemble the equipment during a chemical flushing, then the mechanical requires it without fail. For this use special equipment. It can be mechanical devices, can be mechanical installations, and may be manual mechanical devices. Anyway, but mechanical cleaning is always a contact of the device and surface, therefore the equipment will have to disassemble.
The simplest tools for cleaning are brushes, scrapers, heads cleaners with electric drive. In general, any cleaning enshik. In this case, the mechanical flushing is combined with severe pollution. Sometimes even a strong acidic solution is not able to dissolve a tight flare. But softening very much. And after acid treatment, the brush is starting to work, which gently eliminates the prepared flare. But in this case there is a risk of considering not only a harmful raid, but also particles of the surface. Especially such a variant of the development of events is possible when the surface is cleaned by a similar method for more than once.
Another massive punch on scale can be made using hydrodynamics. The most powerful jet of hot water, the solution sometimes helps to break even tight deposits. But this development is able to damage the surface not to a lesser extent than acid. From the shock wave, the surface can crack or just crack. With all the simplicity of machining, it is the most expensive. And not so much expensive equipment itself.
Price for fluid and reagents for washing
The greatest cost of expenses is a downtime, missed benefit. When the system can be preserved even for a couple of hours, this is a sufficient large number of lost money. No heat, no payment. Yes, and the restoration of surfaces after two three mechanical flushes is simply impossible. Because Remove the layers from the surfaces free of charge. Therefore, they are advised to completely abandon any kind of flushing and switch to liquid or chemical reagents. Using a special fluid and internal surfaces, both boilers and heat exchangers will be clean. And then the question of how to clean them will not occur at all. So that liquid and reagents in any case are extremely profitable acquisition that will save the mass of time, forces and money. The benefit of the price will not bite. These liquid can be easily bought for 1300 rubles, and the German reagents price is slightly higher - 1700 rubles. So choose you!
The "warm company" offers comprehensive maintenance, cleaning and repair of heat exchange equipment in Moscow and St. Petersburg. Our services include the following types of work:
- Flushing of lamellar heat exchangers (physical, chemical)
- Repair of heat exchangers
- (physical, chemical)
- (physical, chemical)
- Service heat exchangers
- replacing seals
- increase power, installation
- supply of spare parts
- consultation
Maintenance of plate heat exchangers: why in Moscow or St. Petersburg should contact the "Warm Company"?
Our services include washing of plate heat exchangers and their service of the following manufacturers: Alfa Laval, SWEP, GEA Ecoflex, G-Mar, Funke, Eesti Termotehnika, "Machineks", "PROMENERGO", "Etra", on the "thermoblock" .
When cleaning, repairing equipment and pipelines, we use exclusively original spare parts, high-quality equipment (for example, pumps), specially designed reagents. The service washing the heat exchanger washing with acid is very in demand.
Turning to us, you will receive the highest level service, your equipment will work for a long time and smoothly. So, you will save considerable funds!
Cleaning heat exchangers, washing heat exchangers - the choice of method!
Damage flushing of heat exchangers is selected as the main method of cleaning in the following cases:
- when the heat exchanger washed like soldering so semi-screw;
- when the degree of pollution is estimated as low or medium (the method of washing the heat exchangers with acid).
Collapsible The most effective and applied if the degree of pollution of heat exchangers is estimated as severe. This may be due to the fact that the channels are completely clogged with sediments and the cleaning of heat exchangers is necessary. In such cases, manufacturers are advised to resort to a collapsible method, which is guaranteed to remove any contamination.
Planned preventive service is less painful significantly extending their service life. Simultaneously improves performance. The main signs of the need for maintenance are: an increase in pressure losses, not to ensure the temperature chart with respect to passport values. The conclusion of technical specialists is needed cleaning the heat exchanger.
The timely and regular procedure for washing the heat exchanger plates is to remove deposits, scale, dirt, microorganisms of any type of devices significantly prolongs the service life, which costs significantly cheaper its overhaul. Nothing goes so expensive as unplanned stops of production.
However, these costs can be avoided, as much can be planned before the problem becomes a reality. It is only necessary to chateen the plan for preventive measures in advance. For example, seals are deposited. However, if you replace them in time, then you can avoid leaks leading to different costs. Plates can be dirty. Skype negatively affects heat transfer and worsens the quality of work. In some cases, the increased pressure drop may cause serious problems. Timely cleaning and flushing will help avoid such problems.
Cleaning and flushing of a plate heat exchanger. Washing service of heat exchangers.
In the process of work, our company uses special chemistry, which does not lead to the destruction of the surface of the plates, does not react with the materials of the seals and at the same time effectively removes almost any types of deposits and scale, which are formed as a result of operation.
Works on the chemical flushing of lamellar heat exchangers produced by our company are characterized by high quality corresponding to international standards, reliability, the optimal value for money.
As part of the maintenance, we carry out cleaning and washing the heat exchanger plates with chemical reagents, including acid.
Current and overhaul of heat exchangers
Current repair of heat exchanger - This is the operational elimination of defects of heat exchange equipment. The need for such an event as a heat exchanger repair may arise in such situations as:
- leakage in one or several places between the plates;
- the flow of media from the contour into the contour.
Overhaul of heat exchanger - This is a complex of the following events:
- replacement of all seals after the expiration of their service life (4-6 years);
- full cleaning of heat exchangers from deposits, scale;
- inspection of plates for detection of corrosion traces, rejection of such plates.
Our company carries out a 24-hour service of any heat exchangers (emergency cleaning and washing of plates in the heat exchanger), as well as the service of emergency repair of heat exchangers of any complexity. We also carry out work to maintain the permanent performance of your equipment.
You can make a contract for service or negotiate about individual visits. It is important that you can own the situation without allowing problems.
In stock There are always basic components and spare parts to the types of heating equipment serviced by us.
As can be seen in the photo, timely service is an important condition for stable operation. Seals and some plates have become unusable - needed flushing.
Specialists of a warm company produce cleaning plates in an acidic bath and are washing the plates under pressure.
The cost of washing heat exchangers, cleaning and repair of plate heat exchangers - the basic prices of Moscow and St. Petersburg.
This table presents several types of heat exchangers. You can learn all prices on the appropriate work on the page with the prices of our site. The cost is shown without taking into account spare parts. These prices are familiarizing.
Ridan (Ridan), Sondex (Sondex)
| 10 | 20 | 30 | 40 | 50 | |
| NN-S04. | 11 212.00 rub. | 11 424.00 rubles. | 11 636.00 rubles. | 11 848.00 rub. | 12 060.00 rub. |
| NN-S07. | 11 611,20 rub. | 12 022.40 rub. | 12 433,60 rub. | 12,844,80 rub. | 13 256.00 rub. |
Etra (Etra) Funke (Funke)
| The number of plates in the heat exchanger apparatus | |||||
| 10 | 20 | 30 | 40 | 50 | |
| ET-004 / FP04 | 11 212.00 rub. | 11 424.00 rubles. | 11 636.00 rubles. | 11 848.00 rub. | 12 060.00 rub. |
| ET-005 / FP-08 | 11 611,20 rub. | 12 022.40 rub. | 12 433,60 rub. | 12,844,80 rub. | 13 256.00 rub. |
Transter (Tranter), SWEP (SWEP)
| The number of plates in the heat exchanger apparatus | |||||
| 10 | 20 | 30 | 40 | 50 | |
| GX06-07-08 | 11 611,20 rub. | 12 022.40 rub. | 12 433,60 rub. | 12,844,80 rub. | 13 256.00 rub. |
| GC-09. | 11 611,20 rub. | 12 022.40 rub. | 12 433,60 rub. | 12,844,80 rub. | 13 256.00 rub. |
Heating APV.
| 10 | 20 | 30 | 40 | 50 | |
| U165, TR 1 | 11 212.00 rub. | 11 424.00 rubles. | 11 636.00 rubles. | 11 848.00 rub. | 12 060.00 rub. |
| SR-2 | 12 212.40 rub. | 12 924.80 rub. | 13 637,20 rub. | 14 349.60 rubles. | 15 062.00 rub. |
Machigumeks GEA.
| Number of plates in the apparatus | |||||
| 10 | 20 | 30 | 40 | 50 | |
| VT-04. | 11 212.00 rub. | 11 424.00 rubles. | 11 636.00 rubles. | 11 848.00 rub. | 12 060.00 rub. |
| VT-10. | 12 212.40 rub. | 12 924.80 rub. | 13 637,20 rub. | 14 349.60 rubles. | 15 062.00 rub. |
Alpha Laval (Alfa Laval)
| Number of plates in the apparatus | |||||
| 10 | 20 | 30 | 40 | 50 | |
| M 6. | 12 212.40 rub. | 12 924.80 rub. | 13 637,20 rub. | 14 349.60 rubles. | 15 062.00 rub. |
| M 10. | 16 710,00 rub. | 17 920.00 rub. | 19 130.00 rubles. | 20 340.00 rubles. | 21 550,00 rub. |
Description:
Since 1992, GUP "Teploremontnnab" has been working in the field of municipal communal services in Moscow, specializes in the installation and maintenance of thermal items of the housing stock, objects of education and health care, administrative buildings. In 1997, the replacement of the shell-and-tube heat exchangers on the stainless water supply and heating systems began.
Chemical washing of lamellar heat exchangers
N. V. Sologubov, Engineer Chemist, GUP "Teplorennnadnab"
Since 1992, GUP "Teploremontnnab" has been working in the field of municipal communal services in Moscow, specializes in the installation and maintenance of thermal items of the housing stock, objects of education and health care, administrative buildings. In 1997, the replacement of the shell-and-tube heat exchangers on the stainless water supply and heating systems began.
Two years later, we encountered a number of problems. Due to the high corrosion activity of the pipeline material, a large number of corrosion products go into water, including a huge amount of iron compounds. When water passes through a plate (water), the heater in temperature mode 5-65 ° C on the surface of the plates is precipitated in the water of mineral salts and a significant part of various forms of iron. The resistance of the boilers began to grow rapidly, the temperature of the hot water at the outlet of the boiler fall, the heat unit decreased and the reverse temperature of the coolant has grown.
The opening of the boilers and the inspection of the surface of the plates showed a high degree of their contamination - a layer of rust-salt deposits reached 1-3 mm, the grooves on the plates are clogged completely. The resulting deposits, despite the seeming ruffiness, have very high adhesion, that is, the adhesion with the surface of the plates, which can be due to the presence of a copper chloride film having a porous structure and adhesion reinforcing. The film thickness is about 30 microns, and it is unusually durable.
Practice has shown that mechanical cleaning of the plates manually is ineffective and very laborious. It is necessary to attract only qualified workers to such work. For example, the cleaning of the M10 heat exchangers manually takes 1 shift with a 4 person brigade. At the same time, the likelihood of damage to the gaskets between the plates is large. Only the sediment sediment is removed from the plates, the film with a thin surface layer of contamination remains untouched. The plates are rejected again for 6 months. The search for methods for cleaning the plates showed that chemical cleaning is most effective. There was a need to create a chemical solution for washing plates of water heaters.
In January 2000, the GUP "Teplore repair" together with Hemalyux LLC began work on the development of cleaning technology and the selection of cleansing compositions.
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As a basis of such a solution, it was decided to take inorganic acid. In the laboratory conditions on dirty plates, solutions of hydrochloric, sulfur and orthophosphoric acids were worked out. On materials made of carbon steel, the hydrochloric acid is impossible. Sulfuric acid influenced the material of the seal and in itself at a temperature of 35-40 ° C is a corrosion-active plate of plates. Orthophosphoric acid is capable of passivating (i.e., create a protective active film) The surface of the plates and does not affect the seal, but even its 30% solution removed the contamination only partially and did not provide the desired degree of cleaning plate. In addition, the solution was quickly worked out (exhausted), which required the addition of new portions of fresh composition. The search for the optimal cleansing agent led to the solution of a complex composition comprising organic acids, the basis of the composition was orthophosphoric acid.
The solution has a number of fundamental advantages compared to others and satisfies the requirements:
Provides fast and complete removal of rust-salt sediments, including the removal of the film by 70-80%;
Provides cleaning at low temperature of the working solution (20-35 ° C) and its low concentration (3-5%);
Does not change the properties of the sealing material;
Partially passs the surface of the plates, slowing the re-formation of the film.
The main distinguishing feature of this composition from others is the mechanism for removing scale, which ensures the above advantages and advantages. The composition provides priority peeling of pollution with its subsequent dissolution.
Washing technology of water heaters, which includes two steps.
1st stage:
A closed circuit is created, where the working solution is pumped through the pump through the heat exchanger.
2nd step:
To neutralize the acidic component of a cleansing agent for 10-15 minutes before the flushing is added, a neutralizer (drinking or calcined soda) is added, the solution of the pH of the solution to 8.5-9 is added.
After the flushing is completed, the working solution is diluted with tap water to the norms allowed to drain, preparing to a discharge into the sewer. Solid precipitates are removed as domestic waste.
In May-June 2000, washing technology was tested in practice. The heat exchangers of different types were chosen as experimental - from small (type M3) to the largest (type M15). General results are presented in the table.
Both heating and heat-made boilers after washing were tested with a pressure of 10 atmospheres. No deviations in their work have been detected. It should also be noted that when washing a soldered heat exchanger with a concentration of 5%, the washing of copper was observed.
The principle of operation of a plate heat exchanger is to transmit heat energy from hot to the cold coolant through a heat exchange surface made of corrugated metal plates.
The washing of the heat exchanger is performed by the staff of the certified service partners of Ryndan, or specially trained personnel of the operating organization in accordance with the operating manual supplied with the machine.
Why not put off the flushing of the heat exchanger?
If it is too long to ignore the fact that the heat exchanger does not produce the calculated parameters, this leads to the following consequences:
- Increase the fuel consumption (For heating medium, a larger amount of thermal energy is required);
- Growth of hydraulic resistance (contamination in the heat exchanger channels slow down the movement of the coolant, which creates an additional load on the pump and can lead to its breakdown);
- Non-problem required parameters for the temperature of the coolant, "Underwear", which leads to a decrease in the quality of heat supply of consumers or a decrease in the efficiency of cooling the coolant of the primary contour;
- Overestimation of the temperature of the coolant of the primary contour, leaving the heat exchanger.
With regular cleaning and maintenance of the heat exchanger, your equipment will last long and will work with maximum efficiency throughout the life.
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Thanks to the information presented here, you can independently, without the involvement of specialists, carry out the prevention of the gas boiler, one or two-kinnoe. The work performed by you in accordance with the recommendations outlined below will be equally qualitative than prevention conducted by qualified personnel of service companies.
In addition, you can save a considerable amount, since the cost of services of specialists can reach several hundreds of American dollars. In addition, to expect the arrival of the master for several days, and even weeks, can arrange far from every owner of the individual heating system, especially shortly before the start of the heating season.
A little theory or why everything begins
Having read the theoretical information, you can understand that the principle of operation of the gas heating system is the elementary process of converting the energy of the combusting gas into the energy of water or any other coolant circulating in the heating system. All these changes occur in the gas boiler heat exchanger (read also: "").
Although heat exchangers of different heating systems and may have some distinctive features, but the design and principle of operation of them are mainly the same: the coolant is undergoing the curved pipe (coil), then the coating coating gas is heated by the flaming gas, transmitting the heat passing through it the liquid submitted further by Pipes to heating radiators. The system of plates in which the tube heated by the flame is placed allows to increase the temperature and make the heating of the coil material more uniform. Externally, such a system resembles a radiator installed in the car.
For the manufacture of heat exchangers, the materials possessing good thermal conductivity are most often used. As a rule, these are copper alloys or copper in its pure form.
In order to ensure efficient heating of the coolant in the heating system, you must follow:
- Clean content of heat exchanger inside and outside
- The purity and lack of blockages in gas nozzles producing gas to heat the heat exchanger and the surrounding plates
Overrigas in this case of gas can be 10-15%. When recalculating the financial equivalent, the amount lost as a result of the inefficient work of the heating system may be quite large. In accordance with the advice of professionals, an annual cleaning of the heat exchanger of a two-kilt heat exchanger is necessary for the effective work of the heating system, however, the practice shows that with soft tap water, it suffices this procedure once every three years.
Skipping in teapots and cranes indicates a high degree of water rigidity, in this case we recommend cleaning the heating system every two years.
Cleaning the heat exchanger of the boiler with their own hands - the beginning of work
Before the start of work, firstly, the heating boiler itself should be turned off from the source of electricity.In order to access the system heat exchanger, you will need the following tools:
- Cross screwdriver
- Flat screwdriver
- Adjustable key.
At the bottom of the turbocharged boiler, you are most likely to find a bunch of trash tight inside. It will be easily removed from an ordinary household vacuum cleaner.
The lower part of the combustion chamber is occupied by a number of nozzles transmitting gas. All nozzles should be carefully cleaned - the holes through which the gas is supplied must become transparent.
Next, it is necessary to remove the heat exchanger itself. In the model under consideration, the threaded connections are missing, the tube through which the water is supplied and derived is connected to the adapter. On the one hand, the heat exchanger is a temperature sensor, from which it should be carefully turned off the wires.
Cleaning plate heat exchangers
The heat exchanger disconnected from the system should be written outside and inside the resulting dirt, rust and scale. It will most easily begin the cleansing of its outdoor part.
To begin with, pour heat exchanger with warm water by adding any living agent to it to remove rust, scale and other contaminants. After some time, rinse from metal with clean water. It will be easier to hold this procedure on the street with the help of high-pressure car washing. If you have no house at home, you can ask you in any car wash to clean the item, but you should follow, so that thin plates do not remember the powerful jet of water (read also: "").
Cleaning the outer surface, you can proceed to the internal part of the heat exchanger in order, that is, the inner walls of the curved tube. It may turn out to be a rather thick layer of scale, especially if the previous prevention was conducted for a long time or was not carried out at all, or if the water in your house is quite rigid. Inside it may also be dirt coming along with tap water, especially if you do not have a filter for cleaning it.
Than to clean the heat exchanger of the boiler
As described above, to clean the outer part of the heat exchanger, it is sufficient to add any domestic chemical agent for washing and cleaning various surfaces into clean water. To purify the inner surface of the heat exchanger walls, more potent drugs may be needed.See the video example of the cleaning of the heat exchanger of the two-door boiler:
First, you can apply the cleaning agent for cleaning plumbing, which removes the flight. Then it follows several times to rinse the tube with the help of a scale designed for coffee machines, irons and other similar techniques. You can do and diluted with citric acid divorced. Next, a powerful jet of water supplied to both holes should be washed with a heat exchanger, removing remnants of cleaning agents from it.
The free passage of water will be evidence that the tube is inside the clean. After graduating from "bath" procedures, collect everything in the reverse order, not forgetting to remove all accumulated dirt from the inside of the boiler. Turning it on full capacity, you should make sure that there are no swap and the proper operation of the boiler.
You will need only about two hours to fulfill all the works.