Chemical flushing of gas boilers and heat exchangers. Yan Maryanovsky, Arkadiusz Nalikovsky, Anna Petshkovskaya, Artyom Kuryakov, Chemical cleaning of steam boilers from deposits and corrosion products using traditional methods and the “in-use” method

There are two types of descaling from the boiler heat exchanger - cleaning of corrosive deposits from the system and the main heat exchanger of the boiler and cleaning of solid deposits.

A flushing station with a tank is connected to the heating system, in which the chemical is located, which is mixed with water of the required concentration and distributed through the heating system. The pump distributes these chemicals at high speed through the boiler heat exchanger. This dirty liquid is pumped out of the return at high speed and replaced with fresh water to ensure sufficient chemical flow. This mixture is in turn drained and replaced with new water and corrosion inhibitor. The whole process takes several hours.

Scale in the boiler heat exchanger is removed when the heat exchanger accumulates a significant thickness of calcium on its surface, and it isolates the water from the heat source, thereby reducing performance.

This effect occurs only in the heat exchanger in which there is tap water. AT closed systems there is a lot of content a large number of calcium. There are always two ways out, either it is necessary to replace the old heat exchanger with a new one, or to remove scale with acid. Descaling with acid is considered a simpler and cheaper procedure.

Why is it necessary to flush the boiler heat exchanger?

Boiler flushing is effective way removing sediment and dirt, and what builds up inside your heating system over time. If you notice a gradual decrease in the efficiency of the boiler, this sludge envelops the internal pipelines and reduces the circulation of the heat carrier in the heating system.

Sludge and scale are formed mainly in old boilers or when replacing an old boiler with a new one in older systems. If you have replaced the old boiler with a new one, dirt still remains in the heating system, and when starting up, all the dirt can get into the new boiler, which will reduce its efficiency and service life.

Some problems that can be avoided by flushing:

• Cold Radiators
• Problems with coolant circulation
• Pipe blockages
• Internal corrosion
• Blockage of the entire system
• Noise during boiler operation
• Double-circuit boilers cannot provide a constant hot water at a stable temperature
• Permanent failure circulation pump
• A sharp increase in the pressure of the heating system
• Leaks in connections and heating radiators
• The heating system in the house is slowly heating up

As a result of washing the boiler, you will receive:

• Fuel economy when heating the boiler up to 25%
• Extended boiler and pump life
• Full heat transfer from heating radiators
• High efficiency heating system that will reduce gas costs
• Cleaning the boiler heat exchanger will remove unpleasant noises and extend the life of the boiler
• When cleaning the system from contaminated water, it will help to avoid internal corrosion of the heating system

What causes scale to form on the boiler heat exchanger

The heating system includes a boiler, radiators, and connecting pipes. This system is filled with water, which is heated in a boiler and circulated by means of a pump through the radiators. Water carries dissolved oxygen, which reacts with metal in radiators and pipes as metal oxide. This water may also high level calcium and other minerals that come from the plumbing. Over time, the levels of these impurities can increase and cause problems for the entire heating system. These contaminants can form deposits inside radiators, which can reduce or shut off flow. hot water to these radiators. These impurities can form a layer on the inside of boiler heat exchangers and reduce the efficiency of such boilers. If this is not stopped and the heat exchanger is not flushed, the layer will grow and the boiler will begin to make noise when it is working.

Contact our office and we will flush the boiler heat exchanger at affordable prices.

The price of flushing the boiler heat exchanger

Over the past few years, sales of boiler equipment have increased by several points, in particular, the demand for equipment for cottages has increased. Boilers are equipment for heating private houses and for producing steam in industry. Purchasing power for such goods falls in the warm season - in spring and summer. This is due to the fact that by the onset of cold weather, many residents want to already have a fully functioning boiler equipment. AT cold winter such a plant is in active use, and in order to prolong its operational capacity, regular maintenance should be carried out. cleaning of heat exchangers. To choose the right desired method, you need to be guided by several indicators: the quality of the water used and the type of boiler equipment. The best thing boiler flushing will be implemented with an integrated approach.

Mechanical cleaning of boilers

mechanical cleaning heat exchangers is a process of washing equipment with water, which is supplied under high pressure. In order to carry out this event, it is necessary to disassemble the boiler into parts and rinse each one well. This method allows you to get rid of even severe corrosion and scale. Mechanical cleaning of boilers - not a very common method, although quite simple and effective. Main advantages:

1. High environmental friendliness of the method.
2. No need for chemicals.
3. No additional flushing of chemicals is required.

But we should not forget that this method requires additional time and effort for its implementation. To clean, you need to invite a specialist who has experience with such a unit. The professionalism of the worker will allow you to quickly and efficiently disassemble and assemble heating equipment.

Chemical cleaning of boilers

Chemical flushing of heat exchangers happens with the help special means- reagents. For this method, you need to invite a professional who has experience in handling chemicals. He will make a solution with the required concentration, which will cope with his task. After that, the boiler is rinsed with plain water. If necessary, the process can be repeated several times. The amount will depend on the complexity of scale on the walls of the heat exchanger. Chemical washing of boilers has the following advantages:

1. Work takes place without dismantling the equipment.
2. Chemical acids qualitatively relieve plaque.
3. You do not need to apply significant physical exertion for this method.

However, this method may not always be effective. It is not suitable for removing corrosion. For more serious sediments and deposits, chemical and physical cleaning of the boilers should be used together.

Repair of boiler equipment

At long-term operation any device or a separate part of it can fail. This needs to be repaired. The qualification of specialists will allow you to repair breakdowns of any complexity in boilers of different manufacturers. Even models of modern brands. The presence of special tools and apparatuses make it possible for quick and high-quality diagnostics of boiler equipment. No need to postpone the repair of heat exchangers for later. The sooner the repair process begins, the less time and money will be spent on it. Our company guarantees the quality of work and repairs in a short period of time.

Timely chemical flushing of boilers performed by our company’s employees will get rid of scale in cases where other cleaning methods do not bring desired result. The formation of scale on heating surfaces reduces the operating period of the equipment and reduces heat transfer. Maintenance will eliminate the appearance of defects, damage to equipment and system failure.

The effectiveness of the procedure

Chemical flushing of boilers is one of the most popular services, it is regularly performed by the company's masters. Its implementation allows you to clean the surfaces of heat exchangers without dismantling the unit. The reagent used penetrates into hard-to-reach places installations, determining the quality of cleaning.
The choice of solution, reagent concentration and cleaning method is made on an individual basis. It depends on the thickness and density of the coating, the degree of contamination and the material of the internal surfaces of the boiler. The following equipment is required for work: a pump, an expansion tank, a piping system for connecting to a boiler plant and removing carbon dioxide. The procedure requires strict adherence to safety rules due to the use of strong reagents. The execution steps include the following:

• system diagnostics, determination of the degree of contamination and designation possible defects;
• selection of one or more solutions for the efficiency and safety of work;
• flushing (filling liquids and their circulation inside the containers);
• neutralization of the actions of reagents and passivation of treated surfaces;
• final rinse with clean water.

As a result of the procedure, the hydraulic performance of the boiler plant is improved, fuel consumption is reduced and efficiency is increased. Metal passivation is the prevention of corrosion formations leading to large-scale destruction of the walls. Cleaning the heat exchanger prevents premature failure and associated financial costs. Regular control chemical composition water used during the operation of the system will eliminate the problems that occur with excessive mineralization and violation of the acid-base balance.

Treatment Benefits

By providing chemical cleaning services for boiler equipment, we strive to create attractive conditions for long-term cooperation. Numerous service stations managed to appreciate the responsible attitude to work and the professional level of employees. Benefits of the treatment include:

• performance of work of any complexity within the time specified in the contract;
• careful handling of equipment, excluding unintentional breakdowns and damage;
• compliance with safety standards by masters;
• absence of factors that contribute to pollution environment;
• availability of the latest equipment and quality Supplies;
• an individual approach that determines the choice of reagent, the duration of exposure and the method of manipulation;
• attractive cost and transparency of pricing policy;
• providing professional advice and detailed answers to questions regarding the repair and maintenance of boilers of various configurations.

To use the service for chemical washing of boilers, just call the specified phone number or fill out the order form. We are ready to cooperate, contact us!

Air heating in a country house is not popular in Russia now. This method is widely used in Canada and the USA. Steam This type of heating in cottages is practically not used. It is mainly used in industrial facilities. It is economically and technically justified if steam is involved in technological processes enterprises. Stove Heating with a stove is a well-known option. AT country houses stove heating gradually gives way to more modern, efficient and easy-to-use options. warm up large cottage oven is not possible. In many homes, the stove is an element of interior design, and not a source of heating. Heating system country houses with a liquid heat carrier Let us dwell in more detail on the most popular type of heating - water. Water heating systems, depending on the fuel used, are divided into following classes: Systems operating on gas (main gas, liquefied gas) Electric heating (with electric boilers) Solid fuel systems Liquid fuel systems In terms of living comfort, all heating options indicated…

In anticipation new year holidays pyrotechnic products are in great demand. As a result, staff...

Chemical flushing of boilers: description available funds and execution rules

Timely technical inspection and maintenance of boiler equipment will always contribute to its uninterrupted and stable operation.

One of the important maintenance works is the cleaning and washing of boilers.

In this article we will describe in detail all the nuances and aspects of this type of work.

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The essence of the procedure

Internal walls of pipes before and after chemical processing It's no secret that during the operation of boiler equipment, scale and various kinds chemical pollution. This, in turn, complicates the operation of the boiler system.

The scope of work, which includes cleaning and removing unnecessary deposits, is precisely called the chemical washing of the boiler.

It is also worth noting that flushing is a relatively inexpensive cleaning method that results in maximum efficiency.

Advantages

Chemical flushing of boilers contributes to the following positive aspects:

Such improvements confirm once again that flushing is really effective and rational method boiler system cleaning.

Sequence of work

Flushing of boiler equipment should take place in a strictly defined order, the main stages of which are the following important points:

In fact, all stages of work do not pose any particular technical difficulties, but for a better understanding, it is worth dwelling in more detail on which devices are used to carry out the entire washing process.

Equipment for cleaning boiler systems

As mentioned above, the entire process of chemical washing is carried out using a special device called a booster.

The booster consists of the following elements:

It should be noted that the booster is a unique device of its kind, which greatly facilitates the washing of boiler equipment.

Materials used

An important aspect of washing the boiler unit is the question of the use of various acidic substances.

Exist the following types acids with which the boiler equipment is cleaned:

1. Adipic acid. This substance is diluted with water in a certain proportion, and is directly fed into the boiler with the help of a booster. Carbon dioxide, when interacting with dirt and scale, dissolves them, and then turns into a precipitate, which is subsequently washed out under pressure technical water. Most the best option the use of a solution with adipic acid will be for chemical washing of domestic boilers for heating.
2. Lemon acid. This type of acidic substance greatly simplifies the cleaning of the boiler, as it can be added directly to the reagent that circulates in process water.
3. Sulfamic acid. After the circulation of this reagent in the boiler equipment, it is necessary to thoroughly rinse the system and then dry it. This type of acid effectively cleans internal surfaces steam boilers.
4. Hydrochloric acid. The concentration of the solution of this aggressive substance directly depends on the thickness of the contaminated scale. If the thickness of the deposits is 1 mm, then, accordingly, there should be a 1% solution. In other cases, the concentration of the solution does not increase, and the boiler is flushed several times. Hydrochloric acid is optimally suited for cleaning waste heat boilers.
5. Gel. This type of substance does not belong to acidic environments, however, it dissolves oil-based pollutants quite well. The main condition for the use of a gel substance is a thorough flushing of the boiler equipment with technical fluid.

Getting to know the characteristics chemical reagents for cleaning the boiler, we can conclude: all types of substances used are aggressive, therefore, precautions must be taken when working with them.

Safety regulations

When working with substances for chemical washing of boilers, it is necessary to observe a number of the following recommendations:

In this article, we have introduced you in detail to all aspects of chemical washing of boiler equipment. Taking them into account, you can easily cope with the dry cleaning of boilers of any modification.

Watch the video in which experts demonstrate competent chemical washing of the boiler:

Some salts are released from the water during its heating and evaporation in the boiler and are deposited on the inner walls of the heating surfaces in the form of dense, hard-to-separate scale, which impairs heat transfer through the wall and can cause metal destruction as a result of overheating. Other salts precipitate in the volume of boiler water in the form of fine suspended particles, which leads to the appearance of a mobile sediment in the boiler, called sludge, which can also cause a boiler failure.

To prevent the formation chemical elements and scale, it is necessary to carry out a complete cleaning of the boiler equipment every 2-4 years:

Saving your business budget

mechanical cleaning

To order

(including cost of reagents)

The most common and most economical way to clean the boiler, which does not require high costs, fully meeting all cleaning standards. This method requires a stop heat exchanger, its cooling, water drainage and partial disassembly. Mechanical cleaning of the boiler is carried out using the EKR-2 unit and a mechanical tool.

Mechanical cleaning of boilers from scale is carried out using two types of tools. Hand tools - scrapers, scrapers, metal brushes. Mechanical tools include non-spreading and spreading heads driven through a flexible shaft from a two-speed asynchronous motor or air turbine. During mechanical cleaning, first of all, the walls of the drums and collectors are cleaned. To do this, use special heads OP (open surface).

The heads of the OP are equipped with cutters mounted on the axis. When rotating by an electric motor or an air turbine, the cutters rotate together with the head, cleaning off scale from the walls against which the head is pressed with its teeth. OP heads are one-, two-, three- and four-row.

Descaling with application hand tool carried out in places inaccessible for cleaning mechanical tool(at the corners of the joints of the partitions, near the protruding ends of the pipes, etc.).

Descaling with a hammer sharp ends, the so-called clavicle, is strictly prohibited, since it damages metal surface drum to a depth of 0.5 ... 1 mm, which favors increased corrosion.

The surface cleaned with a manual or mechanical tool is washed with a stream of water, and then the quality of cleaning is checked. Screen and boiler pipes are cleaned after drums and headers. For this, other heads are used, which differ from the heads of the OP in that the axes of the cutters are attached to the head on hinges. When the head rotates, these axes, together with the cutters, diverge to the sides due to the action of centrifugal force, press against the pipe wall and clean it of scale. Such heads for cleaning pipes are called spreading. In all cases, pipes are cleaned with cutters while simultaneously washing the places of cleaning with water. In this case, the cutters are cooled and scale is washed off, which clogs the space between the teeth of the cutters. During cleaning, the flexible shaft must not be passed into the pipe below the fixed collar. This is necessary in order to prevent the head from leaving the lower end of the pipe and breaking the cutters.

Chemical cleaning

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(including cost of reagents)

This method of cleaning allows cleaning of heat exchange units (boilers of all types, heat exchangers, boilers, coolers, cooling jackets of compressors, etc.) from scale without the need to disassemble the unit. It also allows the cleaning solution to penetrate into all hard-to-reach places of the unit, which allows for a more thorough cleaning of the heat exchange surfaces.

Individual selection reagents, as well as the concentration of the solution, washing methods, depending on the physical and chemical qualities of the scale and the material of the heat exchange surfaces, allows washing without damaging the units.
The flushing scheme is developed individually for each specific unit, depending on the reagents used, the technology and the degree of contamination. It includes expansion tank, chemical pump, piping, boiler connection, removal piping carbon dioxide, released at chemical reaction. Heating of the solution can also be provided, depending on the washing technology.

The technology of chemical cleaning of boilers requires compliance with strict safety regulations due to the use of acids, alkalis, and other chemical additives in the process. Chemical cleaning produced under the guidance experienced professionals. The flushing process is controlled by regular taking of chemical samples of the solution for the presence of active hydrogen ions, the mass content of iron and other metals in the solution, from which the heating surfaces of the boiler unit are made. Chemical analysis before cleaning is carried out to exclude chemical damage to the heat exchange surface.
After chemical washing of the boilers, the active residues of the reagents are neutralized, the washed surfaces are passivated, and they are chemically coated with an anti-corrosion layer (phosphating).

Waste solutions are neutralized, brought to sanitary norms and drain into the sewer. The reagents used by us for cleaning boilers do not contain salts. heavy metals and are biodegradable.

Hydrodynamic cleaning

To order

(including cost of reagents)

This method of cleaning boiler equipment consists in the destruction of deposits and their simultaneous removal from the surface to be cleaned with water jets. high pressure submitted to working area from the high-pressure pump through special nozzles, using a high-pressure hydrodynamic unit.

Depending on the type and condition of the equipment to be cleaned, the GUVD operator can change the pressure value from 0 to 630 atm and the water flow rate up to 4.5 cubic meters. m per hour, while cleaning occurs without violating the integrity of the equipment being cleaned, with the greatest efficiency, productivity and quality.

Effectively removes any deposits, regardless of their physical properties, chemical composition and spatial arrangement. A more gentle method that does not damage the surfaces of the machined equipment. Does not occur during cleaning overpressure in the tank being washed itself, which eliminates damage to the sealing elements and units of the equipment being processed.

The use of ultra-high pressure systems makes it possible to increase the productivity of cleaning operations by dozens of times and thereby reduce downtime technological equipment, i.e. direct and indirect economic losses. Ecological cleanliness and safety technical process guaranteed. When cleaning, an environmentally friendly working environment (water) is used, which makes it possible to significantly simplify the disposal of processing waste.