Industrial chemical water treatment for boiler houses. Experience in the design and operation of boiler complexes based on modern automated equipment

Water dissolves various substances well and enters into compounds with them, therefore there is no chemically pure water in nature. Impurities in water are of two types: mechanical (sand, clay, etc.) and chemical (salts of calcium, magnesium, etc.). Depending on the content of chemical impurities in water, water is divided into soft and hard.

Soft water contains a small amount of calcium and magnesium salts, hard water contains more of them. To assess the quality of water in technology, the concept of its hardness has been introduced. There are temporary, permanent and general hardness of water.

The temporary hardness of water (or carbonate) is due to the presence in it of bicarbonate salts of calcium Ca (HCO3) g and magnesium Mg (HCO3) g, which at a temperature of St. 70 °C decompose and precipitate out of solution in the form of sludge. Constant water hardness (or non-carbonate) is due to the presence of chlorides, sulfates, silicates and other calcium and magnesium salts in the water (CaSO 2, MgSO 3, CaCl 3, MgCI2, CaSC 3, etc.). These salts, when water is heated, do not precipitate from solutions, therefore such water is called water of constant hardness.

The total hardness of water is the sum of temporary and permanent hardness. Since 1952, the unit of hardness has been milligram equivalent per 1 liter of water (mg-equiv/l). Low hardness (condensate, distillate) is measured in thousandths of mcg-eq / l-microgram equivalent.

Previously, the unit of hardness was the degree of hardness, corresponding to the content of 10 mg of calcium oxide (lime) in 1 liter of water. A unit (mg-eq/l) is 2.8 times more than a degree of hardness.
In accordance with GOST 6055 86, the unit of hardness will be a mole per cubic meter(mol / m 3).

The numerical value of hardness, expressed in moles per cubic meter (mol/m3), will be equal to the numerical value of hardness, expressed in milligram equivalent per kg or liter (mg-eq/kg or mg-eq/l). One mole per cubic meter corresponds to a mass concentration of equivalents of calcium ions (1/2 Ca 2 -G) 20.04 g / m 3 and magnesium ions 1/2 Mg) 12.153 g / m 3.

In heat supply systems from heating boilers with cast-iron or steel boilers, water leakage inevitably occurs, which should be replenished with make-up water that has previously been treated in chemical water treatment plants (CWT), consisting of clarifiers and coagulation devices and water softening filters. Clarifiers are designed to remove suspended matter from water. Calcium and magnesium salts, which cause scale formation, are localized in water softening filters.

Typically, heating boilers are supplied with water from the water supply, which does not need to be cleaned. Water is only softened and degassed. Tap water contains dissolved salts and gases; when heated, salts precipitate on the inner walls of boilers in the form of scale. Putting on the walls of boilers lowers the heat transfer coefficient and, therefore, leads to excessive fuel consumption. In the furnace part, scale can cause overheating of the wall and a boiler failure. Dissolved in water gases, oxygen and carbon dioxide, cause corrosion of the metal. Cast iron boilers are not very susceptible to corrosion, so oxygen and carbon dioxide are dangerous mainly for steel boilers and hot water systems.

To avoid the formation of scale in boilers, water of a certain hardness should be used or subjected to softening and degassing. Degassing of water in heating and boiler houses is carried out using vacuum deaeration.

Norms of feed and make-up water. It should be noted that there are no uniform standards for the quality of feed and make-up water for steam and hot-water cast-iron boilers. So, earlier: it was assumed that for cast-iron steam boilers, the total hardness of the feed water should be no more than 300 mcg-eq / l. The content of dissolved oxygen and other impurities is normalized. According to the rules technical operation boiler house for housing and communal services, issued by the MZHKH RSFSR 1 1973. The composition of the feed water for steam cast-iron boilers must be no worse than the following:

pH value not less than 7
Hardness, mcg-eq/.t no more than 20(7)
Content, mcg/l, not more than: oxygen, carbon dioxide, sodium sulfite.

According to the previously established standards for cast-iron hot water boilers, the make-up water of heating networks at closed system heat supply should have carbonate hardness and above 700 mcg-eq/l. The total hardness and oxygen content in make-up water are not standardized.

Water treatment of boiler houses used in heating boiler houses of low power is a simplified scheme of a single-stage sodium-cationized with wet storage of the reagent.

With cationized sodium, salts that are poorly soluble in water turn into highly soluble ones, which, even at a high content in water, do not precipitate. At the same time, the total amount of salts does not decrease. As a cation exchanger, the mineral glauconite, sulfonated coal and synthetic resins are used. When the cation exchanger is depleted (as evidenced by the increase in the hardness of softened water), the filter is regenerated. The cation exchanger regenerates with a reverse flow of a 10% solution table salt NaCl. Regeneration consists of loosening the cationite, passing a sodium chloride solution through it and washing it off. During regeneration, sodium ions displace the absorbed calcium and magnesium ions from the cation exchanger, which pass into solution. The cation exchanger treated in this way is enriched with sodium cations and regains the ability to soften hard water. To remove regeneration products and residues of a sodium chloride solution, the cation exchanger is washed.

The simplest scheme of the Na-catnonite plant is shown in fig. 54. Softened water enters the catnonite filter where the hardness salts react with the cation exchanger. To restore the exchange capacity, the cation exchanger is periodically treated with a solution of common salt entering the filter from the salt solvent.

The method of wet storage of the reagent (common salt) is that the salt is stored in concrete tanks. In the lower part of which a small amount of it is in a dissolved state (concentration of about 25%). This solution is pumped into the brine filter, and then into special tanks, where it is diluted to a concentration of -10% regenerative solution and consumed as needed.

Water treatment of boiler houses uses the main equipment - cationite;

Fig. 54, Scheme of the simplest Na-ka thiomnome installation, filters shown in fig. 55. The filter housing is designed for an operating pressure of 392-585 kPa (4-6 atm). In its lower part there is a drainage device for uniform distribution of passing water over the filter section. drainage device fixed in a concrete cushion and consists of a collector and a pipe system. Water enters the pipes through fittings welded to the top of the pipes. Hexagonal plastic caps with several holes on each side are screwed onto the fittings. On the surface of concrete with drainage caps, there is a quartz bedding with a grain size of 10 to 1 mm. The grain size decreases from bottom to top. The quartz pad prevents the removal of cationic material through the drainage system. A cation exchanger is laid above the bedding, a water cushion is located above. The upper manhole is used for loading quartz and cation exchanger, and the lower manhole is for draining water during washing of quartz during initial loading.

The most common cation exchanger at present is sulfonated coal, which is obtained after treating brown or hard coal with fuming sulfuric acid. When the filter is running, valves 1 and 4 are open, the rest are closed. For regeneration, the filter material is first loosened by opening valves 3 and 6. Usually, salt water is loosened from the washing tank, in which it accumulates after washing. Next, a sodium chloride solution is fed into the filter, valves 2 and 5 are opened. After regeneration, the filter is washed with source water to remove the residual Ca and Mg chlorides and excess sodium chloride solution. At the same time, valves 1 and 3 are opened.

flushing salt water collected in a wash tank for use in the loosening process in the next regeneration period and to save salt consumption. In the absence of a flushing tank, flushing water is discharged into the drain, in which case valves 1 and 5 are opened. Pipelines of small diameters are used for sampling water. In the filters of the latest designs, water is supplied through the center of the upper bottom, and the outlet is through the center of the bottom with the passage of the outlet pipe through the concrete pad.

Regeneration of the catnonite filter is usually carried out two to three times a day. All operations usually take up to 1.5 hours, so a backup filter is installed. In addition to the backup filter of the first stage for steam boilers, barrier filters of the second stage connected in series are also installed. Barrier filters provide deep softening and constant hardness of the water dispensed.

In addition to cationite filters, the water treatment of boiler houses includes pumps, brine filters, wash water tanks and wet salt storage tanks, various measuring tanks, etc.

In accordance with SNiP P-35-76, boiler plants for cast-iron steam boilers, as well as for steel steam boilers, allowing in-boiler water treatment, it is allowed to use magnetic water treatment with a source water hardness of -9000 µg-eq / l and an iron content of -300 µg / l.

According to the AKH them. K. D. Pamfilova, magnetic treatment is recommended for cast iron and steel sectional boilers with a heat load of the heating surface of not more than 24.4 thousand W / m; 21 thousand kcal / (m * h) with carbonate hardness of water not more than 9000 kkg-eq / l.

Scheme of installation of an antiscale magnetic device with permanent magnets PMU-1 is shown in fig. 56. The principle of operation of PMU-1 (Fig. 57) is as follows: When make-up water passes through a magnetic field of a certain strength and polarity, the salts dissolved in it change their structure and do not settle on the walls of the boiler, but precipitate in the form of sludge, which is removed through a sludge separator.

At present, new devices for magnetic water treatment in heating boiler rooms have been developed: AMP-5 magnetic antiscale device and AFLM-40 magnetic barbarium ferrite device. The figures correspond to the productivity of the devices in m:, / h.

For magnetic water treatment in steel boilers average performance installations with electromagnets of constant and alternating current. The devices are installed on the line of source water entering the feed tank or degasser.

Vacuum deaeration. Oxygen and carbon dioxide dissolved in water cause corrosion of the boiler walls. Dissolved gases and air are removed from the water by degassing. There are several ways to remove (deaerate) dissolved gases from water: thermal deaeration, vacuum deaeration.

In hot water heating boilers where there is no steam, it is recommended to degas the water using vacuum deaeration. The principle of operation of the installation for vacuum deaeration is as follows: water from the storage tank is supplied by a make-up pump to the ejector. The ejector creates the necessary vacuum in the deaerator head. After the ejector, the water is discharged into an open tank (gas separator), where part of the gases is separated from the water. For intensive degassing, the water in the deaerator is heated to 50-60°C.

Deaeration using steel particle and magnum-mass filters, as well as electro by chemical means did not find application.

Water treatment of boiler houses includes chemical cleaning of boilers from scale. This method is the only one possible for descaling cast iron and steel sectional boilers. Cleaning is carried out with a solution of hydrochloric acid. Less commonly used for this purpose are phosphorus, chromium and sulfuric acid. However, although acid cleaning is very effective, its frequent use should be avoided at all costs due to possible corrosion of the metal. For chemical cleaning of boilers, weak aqueous solutions of hydrochloric acid with a concentration of up to 10% with the addition of an acid corrosion inhibitor are used. which does not prevent the decomposition of scale, but reduces metal corrosion (technical urotropine, retarders of the LB-5, PB-6 brands, carpentry and hide glue). The work must be carried out by qualified personnel in special clothing (tarpaulin suit, shoes, rubber gloves and goggles) in strict observance of the instructions at a temperature of 15-25 ° C. Before cleaning, the boiler is disconnected from the heating system, the fittings are removed from it, wooden plugs are installed in the pipelines . The percentage of hydrochloric acid in the solution is set at the rate of % acid per 1 mm layer of scale in the boiler. If the scale thickness is more than 10 mm. chemical cleaning of the boiler is carried out in two or three steps. To determine the layer thickness, two pieces of scale are carefully chipped off through the upper and lower nipple holes of the extreme sections, taking a piece with a greater thickness for calculation. To prepare an acid solution, use wooden or metal barrels with a capacity of 100-500 liters. The acid solution is fed into the boiler by gravity from the bottom of the boiler, so the barrels are placed on the goats or, with a buried boiler room, on the surface of the earth.

When the solution is supplied to the boiler, scale decomposition immediately begins with a large release of carbon dioxide and foam, which are discharged through a hose into a settling barrel. In a cramped boiler room in the absence of ventilation, a lit kerosene lamp or lantern should be placed on the floor to control the accumulation of carbon dioxide. When the lamp goes out, work should be stopped until the room is ventilated.

The cleaning process takes 1-1.5 hours and ends with the cessation of carbon dioxide and lena emission. As a result of the reaction, the acid solution quickly turns from transparent green to cloudy brown, since it contains more than 90% scale, the rest of the scale is in the sediment in the form of sludge. After cleaning, the boiler is washed with water using a curved tube. Inserted into the nipple holes of the sections and gradually moved inside the boiler to flush each section. Flushing continues until water starts to flow from the boiler. pure water. After flushing is completed, it is necessary to check how the boiler is descaled by illuminating it through the nipples with a portable lamp with a voltage of no higher than 12 V.

After washing the boiler with water, it is alkalized, which completely neutralizes the acid residues in the boiler and contributes to the recovery protective film on the surface of the metal, destroyed by the action of acid. Alkalinization is carried out with 1% sodium hydroxide solution. 2% soda ash solution or 2% trisodium phosphate solution. After filling the boiler with an alkaline solution, the latter is heated to the boiling point, after which the pump is started and the boiler is alkalized (circulation of the solution) for 3 hours. After cooling, the alkali solution is drained and the boiler is again thoroughly washed from sludge. Then spend hydraulic test boiler to detect possible leaks previously hidden by scale and sometimes incorrectly attributed to the action of acid on the metal. After that, an act is drawn up in the prescribed form. Boilers are cleaned from scale using mobile unit mounted on a single axle trailer.

Boiler plant Energia-SPB produces various models of water treatment:

Transportation of water treatment and other auxiliary boiler equipment is carried out by road, railway gondola cars and river transport. The boiler plant supplies products to all regions of Russia and Kazakhstan.

An obligatory method of intensifying the process is the use of previously precipitated sludge (sludge) as a contact medium. Water moving from bottom to top keeps the sludge particles in suspension and contacts their surface. The sparingly soluble substances formed during water treatment are mainly released not in the volume of water, but are deposited on the surface of the sludge particles.

In order to improve the technological properties of the sludge, it is recommended to introduce a flocculant into the treated water in addition to lime and coagulant. Polyacrylamide (PAA) or imported flocculants can be used as flocculants. The mechanism of action of the flocculant is that the molecules of this polymer adsorb various microparticles contained in water and formed in the process of liming and coagulation. The use of a flocculant usually improves the clarification of water, but does not enhance the effect of removing other impurities. The usual dose of flocculant in terms of 100% product is 0.2-1.0 mg/l. The flocculant is usually introduced in the course of the water later than the lime and the coagulant, or the solution of the coagulant and the flocculant is jointly introduced.

One of critical factors the flow of pre-treatment of water in the clarifier is the stability of the dosing of reagents.

The alternating supply of lime, either with excess or with a deficiency, is unacceptable: limed water turns out to be unstable, since the process of reducing hardness continues in it and there is a risk of carbonate deposits forming on the filter material of mechanical filters.

Violation in the operation of the air separator is unacceptable, because. air bubbles remaining in the water stick to the particles of the sludge, make them lighter, which leads to the removal of the sludge from the clarifier.

The water treated in the clarifier, even during its normal operation, contains a certain amount of mechanical impurities, which are in the form of particles suspended in various degrees of dispersion. At the moments of violation of the operating modes of the clarifier, the amount of impurities increases sharply due to the sludge carried out.

To remove suspended sludge that enters the lime-coagulated water, it is filtered through mechanical filters loaded with crushed anthracite.

Suspended substances contained in the clarified water, when moving through the filter material, are retained by it, and the water is clarified. Extraction of mechanical impurities from water due to their adhesion to the grains of the filter material occurs under the action of adhesion forces. The sediment accumulating in the filter layer has a fragile structure and is destroyed under the influence of the hydrodynamic forces of the flow, some of the previously adhered particles are torn off from the grains in the form of small particles and transferred to the subsequent layers of the load. Over time, as sediment accumulates in the filtering layer, the role of its upper layers decreases, and after saturation, they cease to clarify the water. This increases the contamination of the subsequent layer, etc. When the entire thickness of the load is insufficient to provide the required completeness of water clarification, the concentration of suspended matter in the filtrate will rapidly increase.

When moving through the filter material, water overcomes the resistance resulting from its friction against the surface of the grains of the filter material, which is characterized by the so-called head loss value.

A water treatment plant (WTP) with a capacity of 80 t/h provides the preparation of deeply softened water to replenish steam and condensate losses in the boiler room low pressure with drum boilers GM-50/14.

Water treatment is carried out according to the scheme of two-stage sodium cationization with preliminary clarification on mechanical filters. The main source of water supply is the Neva River.

Water is supplied to the WLU from the main building, preheated to a temperature of 30 0 C.

The water supply scheme of the boiler house allows water to be supplied to the HVO from the CHP circus system (fire water supply scheme).

Heated water is supplied to mechanical filters (MF), then to

Na-cationite filters 1st and 2nd stage. Softened water after the 2nd stage Na-cationite filter is supplied directly to the deaerator head (DSA) of the boiler room, or to the chemically treated water tank (CWW) and from there by chemically treated water pumps

(NHOV-1, 2) in DSA.

PURPOSE AND BRIEF DESCRIPTION
EQUIPMENT HVO KND

KND CWT equipment includes mechanical and Na-cation filters,

tank facilities and pumping equipment, a system of pipelines and channels, as well as means of monitoring and managing its operation, providing the required technology and quality of source water treatment.

Mechanical filters (MF).

3 vertical mechanical filters (MF-1, MF-2, MF-3) of pressure type are installed on the CPV HPC, which are designed to purify the source water from suspended solids (Æ - 3000 mm, area cross section-7.1 m 2, working pressure not more than 6 kgf / cm 2, filtration rate during operation - 5 ¸ 6 m / h, 35 ¸ 42 m 3 / h).

Structurally, the MF is a vertical steel cylinder with spherical bottoms welded on top and bottom. The top and bottom are mounted inside the filter. switchgears(VDRU, NDRU). VDRW is a glass from which 12 rays extend radially ( polyethylene pipes), having a series of holes along the length Æ 15 mm. NDRU is mounted on the lower bottom filled with concrete with a cement screed and is a central collector with a diameter of

219 mm, from which rays diverge along its entire length on both sides. Each beam has a number of holes Æ 6 mm, which are closed by a stainless steel casing with slots of 0.4 ± 0.1 mm. Two hatches are made in the filter housing: the upper one is for inspection, the lower one is for repair. In the lower part of the housing there is a fitting for hydraulic overloading of the filter material. The inner surface of the filter has anti-corrosion protection in the form of paintwork based on epoxy putty (EP 0010). Pipelines are mounted on the filter housing with shutoff valves:

supply of raw water to the filter with a valve (z.1);

removal of clarified water from the filter from z.2;

· water supply for loosening from z.3;

upper drainage from z.4;

lower drains from z.5;

· supply of compressed air for loosening from z.6.

The filters are equipped with two sampling points with pressure gauges connected to them on the pipelines of the source and treated water. To control the load during filter operation, a flow meter is installed on the clarified water pipeline. Filters are equipped with air vents necessary for periodic removal of air from the filter volume during their operation, as well as used during filter maintenance (loosening, regeneration, repairs, etc.).

Na-cationite filters.

Two Na-cationite filters of the 1st stage and one Na-cationite filter of the 2nd stage are installed on the HPC of the HPC. The piping scheme for Na-cationite filters of the 1st stage is designed so that each filter can operate both in 1st stage and in 2nd stage.

During the Na-cationization of water, the following reactions occur:

2NaR + Ca (HCO 3) 2 ↔ CaR 2 + 2NaHCO 3 ;

2NaR + Mg (HCO 3) 2 ↔ MgR 2 + 2NaHCO 3;

2NaR + CaCl 2 ↔ CaR 2 + 2NaCl;

2NaR + CaSO 4 ↔ CaR 2 + Na 2 SO 4;

2NaR + MgCl 2 ↔ MgR 2 + 2NaCl;

2NaR + MgSO 4 ↔ MgR 2 + Na 2 SO 4 .

where NaR, CaR 2 and MgR 2 are the salt forms of the cation exchanger.

It can be seen from the above reactions that Ca 2+ and Mg 2+ cations are removed from the treated water, and Na + ions enter the treated water. The anionic composition of water does not change.

Structurally, all Na-cation exchange filters are arranged similarly to MF. On the body of the Na-cationite filter of the 1st stage, pipelines with shut-off valves are mounted:

supply of clarified water to the filter from z.1;

supply of Na-cationic water to the filter with z.1A;

· removal of Na-cationic water from the filter from z.2;

· removal of Na-cationic water from z.2A;

upper drainage from z.4;

lower drainage from z.5;

On the body of the Na-cationite filter of the 2nd stage, pipelines with shut-off valves are mounted:

supply of Na-cationic water to the filter from z.1;

· removal of chemically purified water from the filter from z.2;

· supply of water for loosening from z.3;

upper drainage from z.4;

lower drainage from z.5;

supply of salt solution to the filter from z.7, 7A.

Hydro-overload filter (FGP).

A FGP is installed at the CPV of the KND, which is used to carry out repair work on filters with unloading of filter material from them.

Structurally, the filter is designed similarly to the 1st stage Na-cationite filter. The binding of the FGP allows it to be used as an Na-cation exchanger filter

1 step.

Tank economy.

For maintenance of filters and boilers HVO KND in the boiler room there are tanks:

Tank of chemically treated water (BHOV).

It is used to feed DSA-1, DSA-2 boiler room, as well as in case of low pressure in the source water pipeline.

Loosening tank for mechanical filters (BVMF).

The tank is intended for loosening washings of mechanical filters.

Loosening tank for Na-cationite filters (BVKF).

The tank is intended for collection of washing waters of Na-cation exchange filters during regeneration with their subsequent use for loosening washings.

All tanks (BVMF, BKhOV, BVKF) have a volume of 60 m 3 and are equipped with appropriate pipelines for supplying and discharging water, drainage, overflow, and a float level gauge. The inner surface of the tanks has anti-corrosion protection based on epoxy putty (EP 0010).

Wet salt storage tank (BMHS).

Two BMHSs are located at the HVO UWC and are designed to receive and store common salt supplied to the CHPP. They are made of reinforced concrete with waterproofing and buried to the level of Ñ - 1.2 m. The working capacity of each tank is 50 m 3. The tanks are equipped with pipelines for supplying water, compressed air for mixing and dissolving salt, and overflows.

3.4.6. Tank of pure salt solution (BCRS).

The tank is located on the HVO HVO, used as a container for preparing a solution

salt of the required concentration. The volume of the tank is 50 m 3 . The tank is equipped with overflows, a float level gauge, pipelines for supplying salt from BMHS and clarified water. Tank piping allows you to return the salt solution to any of the BMHS. To perform salt-alkali treatments of the HVO HVO filter material, the tank has an alkali supply (from NPSH-1, 2) and steam for heating the solution.

Tanks (BMHS, BCHRS) have an anti-corrosion coating based on epoxy putty (EP 0010).

Pump equipment.

The following pumps are installed to service the filters and supply treated water to the boilers.

Pump of chemically purified water (NKhOV).

Two pumps (working and standby) of the 4K-12 type (Q = 60 - 100 m 3 / h, P = 3.5 kgf / cm 2) are designed to feed the deaerator from the BHOV. The pumps are equipped with a system for automatically switching on the standby pump (ATS) in case of failure of the working one. Checking the ATS is given in Appendix 3 and is performed in case permanent job NHOV.

Loosening pump for Na-cationite filters (NVKF).

Pump type 4K-90 (Q \u003d 90 m 3 / h, P \u003d 2 kgf / cm 2) is intended for loosening

Na-cationic filters.

Loosening pump for mechanical filters (NVMF).

Pump type 8K-18 (Q = 260 m 3 / h, P = 1.5 kgf / cm 2) is used for loosening mechanical filters.

Power water pump (NVS-3).

Pump type 2K-20/30 (Q = 20 m 3 / h, P = 3 kgf / cm 2) is used to create required pressure in the control system of valves with hydraulic drives.

Pure Salt Solution Pump (NCRS).

The pump type X20-31LS (Q = 20 m 3 / h, P = 3.1 kgf / cm 2) is installed on the HVO HVO and is designed to supply a salt solution with a concentration of 6 - 8% from the BChRS directly to the cation exchange filters of the HVO KND.

Salt solution pump (НРС-2).

A pump of the X20-31LS type (Q = 20 m 3 / h, P = 3.1 kgf / cm 2) is installed on the HVO HVO at the mark Ñ - 1.2; designed to supply salt solution from cells (BMHS) to BCHRS.

Hot water boilers cannot work for a long time on normal tap water. Without chemical water treatment, its composition can quickly disable equipment. PromService offers special reagents and technologies to prevent this.

Chemical water treatment is a mandatory process for industrial-scale water heating equipment. It is provided technical requirements to operating conditions.

Chemical water treatment in the boiler room is intended:

for water purification from salts and iron;
binding excess oxygen, which increases corrosion;
HVO for the boiler room serves to correct the alkalinity of the environment;
creating a protective layer that prevents the destruction of metal equipment.

Chemical water treatment can have 1 or 2 stages. One stage of water softening is sufficient for private houses and cottages. Both stages of water purification are necessary to minimize the salt content as much as possible. This process can be continuous or intermittent.

Chemical water treatment in the boiler room saves money

There is no need to allocate money for extraordinary repairs.
The number of scheduled service inspections of equipment is reduced;
HVO for a boiler room, removing scale and reducing corrosion, increases the efficiency of heating equipment. This means that the number of incoming resources can be reduced.
Chemical water treatment also significantly extends the overall life of the equipment.

Chemical water treatment in the boiler room with PromService

Our company sells only the most efficient units. HVO and boiler room chemicals will allow the equipment to be used longer, thereby increasing the overall efficiency of the heating system.

Call now. We provide efficient, cost-effective water treatment.

Chemical water treatment of periodic action for hot water boilers of low power

Productivity - 0.8-1.0 m3 / h

SR 20-63M	DC SP 61506
485$	445$

AQUAFLOW SR 20-63M delivery set:

CWB continuous operation for hot water boilers of medium power

Productivity - 0.8 m3 / h

SR 20-63M	DC SP 61506
910$	445$

Without VAT. Payment in rubles at the rate of the Central Bank of the Russian Federation without additional interest. From a warehouse in Moscow. Retail prices, for regular customers - significant discounts.

2. multi-way control valve with automatic adjustment for water flow;
3. brine tank assembly.

AQUAFLOW DC SP 61506 delivery set:

1. dosing pump with LCD display and level sensor;
2. water meter with pulse output;
3. sealed container of the working solution with graduation.

Water treatment for steam boilers 0.8-1.0 m3/h (Na-cation 2 stages)

Productivity - 0.8 m3 / h

910$	450$	410$
SR 020/2-73	SR 20-63T	DC SP 606

AQUAFLOW SR 20/2-73 delivery set:

1. two filters complete with cationite and drainage distribution devices;
2. multi-way control valve with automatic adjustment for water flow;
3. brine tank assembly.
1. filter complete with cationite and drainage distribution devices;

3. brine tank assembly.
1. dosing pump with LCD display and level sensor;

AQUAFLOW SR 20-63T delivery set:

AQUAFLOW DC SP 606 delivery set:

Water treatment for steam boilers 1.0 m3/h (desalination by reverse osmosis)

Productivity - 0.8 m3 / h

Without VAT. Payment in rubles at the rate of the Central Bank of the Russian Federation without additional interest. From a warehouse in Moscow. Retail prices, for regular customers - significant discounts.

AQUAFLOW DC SP 606 delivery set:

1. dosing pump with LCD display and level sensor;
2. sealed container of the working solution with graduation.

AQUAFLOW RO 40-1,0-L-PP delivery set:

Frame structure, on which the following technological blocks are located:

1. fine cleaning unit;
2 .high pressure pump;
3. membrane block;
4. chemical washing unit.

Instrumentation kit (pressure gauges, flow meters, conductometer and pressure sensors, control cabinet with controller).

AQUAFLOW SR 20-63 T delivery set:

1. filter complete with cationite and drainage distribution devices;
2. multi-way control valve with automatic timer adjustment;
3. brine tank assembly.

A prerequisite for the efficient and durable operation of any equipment in contact with the aquatic environment is its high quality. Coarse water treatment methods are not able to completely eliminate harmful impurities. In such situations it is necessary to organize chemical water treatment or whatever it is called chemical water treatment- the use of special water treatment technologies that correct its chemical composition.

So, with the help of chemical methods of water purification, it is possible to eliminate substances that can cause corrosion, and, consequently, lead to breakage of equipment elements and the distribution network of cold and hot water supply. In heat supply systems, chemical water treatment allows you to protect all elements of the steam condenser path, as well as clean heat exchange equipment. Chemical reagents can also be used to inhibit the processes of deposition of various salts both on equipment and in ion exchange installations.

Some examples of chemical water treatment systems we have installed

TOVP boiler house St. Petersburg

LLC "Plant ATI"

JSC "Cytomed"

HVO for the Mariinsky Theater

Equipment for heating, air conditioning, recycling water supply and boiler houses is quite expensive, but in order for it to last a long time, professional chemical water treatment and chemical water treatment (improving water quality to meet certain requirements), abbreviated as HVP or HVO, is necessary. After such measures, boiler houses will last 10-20 years longer, and energy consumption will be 20-40% more economical.

As a result of the use of chemical water treatment, productivity increases, the service life of devices is extended, and emergency situations on the water supply system are prevented.

Scope of TOVP

Chemical water treatment is one of the most popular methods of water treatment in industry and everyday life. So, most often the need to use a chemical water treatment system arises in the following cases:

When operating steam and hot water boilers.
in air conditioning systems.
in heating networks.
In water recycling systems.
In industry where a highly purified water environment is required.

Typical TOVP solutions for hot water and steam boilers

Stages of chemical water treatment and reagents

The essence of the TOVP is the purification of the aquatic environment from various substances by a chemical method using special reagents that either perform main function in chemical water treatment and water treatment (for example, cation exchangers, coagulants, flocculants), or are used as an auxiliary component that increases the efficiency of the main method (anti-scalants for reverse osmosis systems).

Any chemical water treatment system requires preliminary water purification from coarse mechanical impurities, which allows further chemical water treatment to be carried out more efficiently. Regardless of the purpose and purpose of water treatment, it should include:

Reducing the level of hardness - for this type of CVP, special water softening filters are used, the principle of which is based on cationic ion-exchange resins;
Demineralization is a decrease in the concentration of various salts. The most effective are reverse osmosis plantsproviding ultrafine water purification. However, with large volumes of water consumption, less expensive technologies are mainly used - CWT using special reagents or ion-exchange resins;
Corrective anti-corrosion chemical water treatment - allows you to prevent both oxygen and carbon dioxide corrosion in closed heating systems and cooling circuits;
CWT in order to clean "working" surfaces from various deposits (iron compounds, hardness salts, etc.) and increase the rate of their removal;
Inhibition of the growth of microorganisms in closed systems, including circulating water supply. For this purpose, they are used chemical methods water treatment with biocides - by special means with disinfectant properties that can inhibit the growth of bacteria, dissolve the biological film on inner surface pipes and equipment, inhibit corrosion;
Regeneration of cation exchangers, which were used for iron removal and softening. CVP products remove ions of iron salts and hardness from the surface of ion-exchange resins, save the consumption of salt regeneration solution, increase the filtering capacity and the duration of the filter cycle.

For precise dosing of reagents for chemical water treatment, special dosing pumps and systems are used, and reagent tanks are used to store prepared CVP solutions.

Which water treatment method to choose?

The choice of an HVO system is a rather laborious process that requires special knowledge and skills. In addition, for correct selection necessary in a particular case, devices and technologies for the chemical treatment of water, information about its initial quality is required. So, when choosing a method and reagent for chemical water treatment, it is necessary to take into account the pH of the aquatic environment (with increased alkalinity, special reagents are used in the softening process), the type of hardness salts and the material from which the equipment in contact with the water surface is made (copper, brass, stainless or carbon steel) .

The Ruswater company carries out the design of chemical water treatment and chemical water treatment systems using modern technologies and quality European reagents. By contacting our specialists, you can go through all the stages in one organization: starting with the study of indicators chemical composition water and, ending with a choice necessary methods HVO, selection of devices and reagents.