A small circulation cleaning device for cooling tower and its cleaning process

Abstract

The present invention provides a small circulation cleaning device for a cooling water tower, comprising a circulation pump, a dosing stirring tank, a water inlet pipe of a water distribution tank, a water return pipe of a cold water tank, a plurality of pipe opening plugging air bags and an air compressor, wherein the water inlet of the water distribution tank inlet pipe is connected to the water outlet of the dosing stirring tank, the circulation pump is arranged in the water inlet pipe of the water distribution tank, the water outlet of the water return pipe of the cold water tank is connected to the water return port of the dosing stirring tank, the air compressor inflates and deflates the plurality of pipe opening plugging air bags, and the plurality of pipe opening plugging air bags are used to plug or open the pipe openings of the water distribution pipes of the cooling water tower; the present invention also provides a process for cleaning the cooling water tower using the same. The small circulation cleaning device for the cooling water tower and the cleaning process thereof have the advantages of saving manpower and material resources, less use of cleaning liquid, not easy to corrode metal parts in the system, and easy treatment of wastewater.

Description

Technical Field

[0001] The invention relates to the field of cooling tower cleaning, and in particular to a cooling tower small-circulation cleaning device and a cleaning process thereof. Background Art

[0002] A cooling tower is a structure where circulating water is cooled by natural ventilation. It is one of the important cold-end equipment for large and medium-sized industries or power stations. Its cooling performance has a very important impact on the economy and safety of the power station. Large and medium-sized cooling towers are generally in a hyperbolic shape. The hyperbolic cooling tower consists of a cold water pool, a support, a tower body, a water distribution system and a water sprinkling device, of which the water sprinkling device is the main equipment for water evaporation and heat dissipation; the water sprinkling device is mainly composed of s-wave or oblique wave fillers, a water collector and a nozzle. The water sprinkling filler is the core of the efficiency of heat and mass transfer between water and gas in the cooling tower. Its function is to form a water film or fine water droplets from the hot water splashed down by the water distribution system to increase the contact area between water and air and prolong the flow of water in the tower. It is an important component that affects the heat exchange effect.

[0003] Since the water circulation system of the hyperbolic cooling tower is an open cooling system, dust and other debris can easily enter, and the cooling water is continuously circulated in the system. Due to the combined effects of various factors such as the increase in water temperature, the change in water flow rate, water evaporation, the concentration of various inorganic ions and organic substances, and the structure and materials of the equipment, sediments will adhere and breed a large number of microorganisms, and even form slime and dirt to block the filler, seriously affecting the cooling effect, destroying the vacuum of the turbine condenser, and causing economic losses to the power plant. The reduced cooling effect of the cooling tower will have a great impact on the safe, normal and low-cost operation of the condenser of the power generation system. Therefore, it is very important to clean the cooling tower filler regularly.

[0004] Usually when the packing of the cooling tower is dirty or seriously clogged, it is either manually disassembled for cleaning or directly replaced, or a large amount of chemicals are added to the circulating water and the entire system is circulated and cleaned through a circulating pump. The former requires a lot of manpower and material resources, and the latter consumes a large amount of chemicals, which is easy to pollute the entire circulating water system and corrode metal components. In addition, it is very difficult to neutralize the wastewater, and improper treatment can easily cause environmental pollution.

[0005] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the invention

[0006] The purpose of the present invention is to provide a cooling tower small circulation cleaning device and a cleaning process thereof, which saves manpower and material resources, uses less cleaning fluid, is not easy to corrode metal parts in the system, and has easy wastewater treatment.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a small circulation cleaning device for a cooling tower, comprising a circulation pump, a dosing stirring tank, a water distribution tank inlet pipe, a cold water pool return pipe, a plurality of pipe mouth blocking air bags and an air compressor, the water inlet of the water distribution tank inlet pipe is connected to the water outlet of the dosing stirring tank, the circulation pump is arranged in the water distribution tank inlet pipe, the water outlet of the cold water pool return pipe is connected to the return port of the dosing stirring tank, the air compressor inflates and deflates the plurality of pipe mouth blocking air bags, and the plurality of pipe mouth blocking air bags are used to block or open the pipe mouths of the water distribution pipes of the cooling tower.

[0008] Based on the above, it also includes a flow distributor, and several of the pipe port blocking air bags are connected to the air outlet of the flow distributor through air pipes, and the air compressor is connected to the air inlet of the flow distributor through air pipes.

[0009] Based on the above, it also includes a control cabinet, which controls the flow distribution of the flow distributor and the opening and closing of the circulation pump.

[0010] Based on the above, it also includes an energy accumulator, which is arranged on the air pipe connecting the air compressor and the flow distributor.

[0011] Based on the above, the tube opening blocking airbag is a cylindrical rubber airbag, and an air inlet is opened on one end surface of the tube opening blocking airbag. The air inlet is connected to an air inlet cannula, and the air inlet cannula is connected to the air outlet of the flow distributor through an trachea.

[0012] Based on the above, it also includes a cold water pool submersible pump, and the water outlet of the cold water pool submersible pump is connected to the water inlet of the cold water pool return pipe.

[0013] The present invention also provides a process for cleaning a cooling tower using the above-mentioned cooling tower small circulation cleaning device, comprising the following steps: (1) placing a circulation pump, a dosing mixing tank, an air compressor, a flow distributor and a control cabinet at a reasonable position near the cooling tower; (2) blocking the connection between the water distribution tank and the shaft with a gate plate, and closing the water inlet valve, water outlet valve and sewage gate of the cooling tower; (3) placing the water outlet of the water distribution tank inlet pipe in the water distribution tank of the cooling tower, and a plurality of pipe port sealing air bags are simply fixed in the pipe ports of a plurality of water distribution pipes connected to the water distribution tank, and a cold water tank submersible pump is placed in the cooling tank. The cooling water tank at the bottom of the water tower; (4) A water source is drawn from the circulating water of the power plant to connect to the dosing mixing tank; (5) The sealing airbags of each pipe opening are inflated to seal the pipe openings of each water distribution pipe, and the submersible pump and circulating pump of the cooling water tank are turned on; (6) The sealing airbags of the pipe openings of the water distribution pipe that needs to be cleaned first are deflated, and the circulating water is circulated to clean the water distribution pipe, nozzles and fillers covered by the nozzles; (7) In accordance with the cleaning order, the water distribution pipes that need to be cleaned are opened in turn, and the sealing airbags of the pipe openings opened last are inflated to a sealed state until the cooling water tower is cleaned.

[0014] Based on the above, it also includes the step of replenishing chemicals into the dosing stirring tank during the cleaning process.

[0015] Compared with the prior art, the present invention has outstanding practical characteristics and significant progress. Specifically, the present invention utilizes the inflation and deflation of multiple pipe-mouth blocking airbags to connect the circuit covered by each water distribution pipe in sequence, and forms a cleaning liquid circulation circuit through the cold water pool return pipe, the water distribution tank inlet pipe, the circulation pump and the dosing stirring tank. While ensuring the small-scale circulation of the cleaning liquid, the flow rate and agent concentration requirements for the cleaning of the cooling tower filler are guaranteed, and the scale of the dosing chemical cleaning is reduced to a certain range, avoiding pollution and corrosion of other parts of the circulating water system. It has the advantages of saving manpower and material resources, less cleaning liquid consumption, not easy to corrode metal parts in the system, and easy wastewater treatment.

[0016] Furthermore, the arrangement of the control cabinet, the energy storage device and the flow distributor facilitates centralized control of the status of the circulation pump and several pipe-mouth blocking airbags, making the operation easier; it does not require complicated installation processes, avoids changes to the original cooling tower facilities, avoids large energy consumption, and avoids the neutralization and discharge of large amounts of cleaning wastewater, thereby avoiding impacts on the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a usage status diagram of the small circulation cleaning device for cooling tower in the present invention.

[0018] Figure 2 It is the installation structure diagram in the water distribution tank of the present invention.

[0019] In the figure: 1. Cooling tower; 2. Filler; 3. Cold water tank; 4. Spray system; 5. Dosing mixing tank; 6. Circulation pump; 7. Air compressor; 8. Control cabinet; 9. Cold water tank submersible pump; 10. Accumulator; 11. Flow distributor; 12. Water distribution tank; 13. Cold water tank return pipe; 14. Water distribution tank inlet pipe; 15. Pipe opening plugging airbag; 16. Water distribution pipe; 17. Nozzle; 18. Air pipe; 19. Gate. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0021] like Figure 1 and Figure 2As shown, a small circulation cleaning device for a cooling tower comprises a circulation pump 6, a dosing stirring tank 5, a water distribution tank inlet pipe 14, a cold water tank return pipe 13, a plurality of pipe opening blocking air bags 15 and an air compressor 7. The dosing stirring tank 5 is used to add cleaning chemicals. The water inlet of the water distribution tank inlet pipe 14 is connected to the water outlet of the dosing stirring tank 5. The water outlet of the water distribution tank inlet pipe 14 is used to be installed in the water distribution tank 12. The circulation pump 6 is arranged in the water distribution tank inlet pipe 14. The water outlet of the cold water tank return pipe 13 is connected to the water outlet of the cold water tank return pipe 13. The water return port of the dosing mixing tank 5 and the water inlet hole of the cold water tank return pipe 13 are used to connect to the cold water tank 3, and the air compressor 7 is used to inflate and deflate the several pipe port blocking air bags 15, and the several pipe port blocking air bags 15 are used to block or open the pipe ports of the water distribution pipes 16 of the cooling tower; by opening the water distribution pipes 16 in sequence, the cleaning liquid starts from the dosing mixing tank 5, passes through the spray system 4, the filler 2, and the cold water tank 3 in the cooling tower 1 in sequence, and then returns to the dosing mixing tank 5, realizing the circulation cleaning in the branch, thereby avoiding the use of large-scale chemicals.

[0022] In order to facilitate centralized control, it also includes a control cabinet 8, a flow distributor 11 and an accumulator 10. Several pipe port blocking airbags 15 are connected to the air outlet of the flow distributor 11 through air pipes 18, and the air compressor 7 is connected to the air inlet of the flow distributor 11 through the air pipe 18; the accumulator 10 is arranged on the air pipe 18 connecting the air compressor 7 and the flow distributor 11; the control cabinet 8 controls the flow distribution of the flow distributor 11 and the opening and closing of the circulating pump 6.

[0023] The pipe opening blocking airbag 15 is specifically a cylindrical rubber airbag, and an air inlet is opened on one end surface of the pipe opening blocking airbag 15. The air inlet is connected to an air inlet cannula, and the air inlet cannula is connected to the air outlet of the flow distributor 11 through an air pipe 18.

[0024] The cooling tower small circulation cleaning device also includes a cold water pool submersible pump 9, the water outlet of the cold water pool submersible pump 9 is connected to the water inlet of the cold water pool return pipe 13, and the cold water pool submersible pump 9 is placed in the cold water pool 3 to facilitate pumping the cold water back to the dosing mixing tank 5.

[0025] When the cooling tower small circulation cleaning device is used to clean the cooling tower 1, the following steps are included:

[0026] (1) Place the circulation pump 6, dosing mixing tank 5, air compressor 7, flow distributor 11 and control cabinet 8 at a reasonable location near the cooling tower 1;

[0027] (2) The connection between the water distribution tank 12 and the shaft is blocked with a gate plate 19, and the water inlet valve, water outlet valve and sewage discharge valve of the cooling tower 1 are closed;

[0028] (3) The water outlet of the water inlet pipe of the water distribution tank 12 is placed in the water distribution tank 12 of the cooling tower 1, and a plurality of pipe opening blocking air bags 15 are simply fixed in the pipe openings of a plurality of water distribution pipes 16 connected to the water distribution tank 12, and the cold water pool submersible pump 9 is placed in the cold water pool 3 at the bottom of the cooling tower 1;

[0029] (4) A water source is introduced from the circulating water of the power plant to connect to the dosing mixing tank 5;

[0030] (5) Inflate each pipe-opening blocking airbag 15 to block each water distribution pipe 16, and start the cold water tank submersible pump 9 and the circulating pump 6;

[0031] (6) The airbag 15 for blocking the pipe opening in the water distribution pipe 16 that needs to be cleaned first is deflated, and the circulating water is circulated to clean the water distribution pipe 16, the nozzle 17, and the filler 2 covered by the nozzle 17;

[0032] (7) Open the water distribution pipes 16 that need to be cleaned in sequence, and at the same time inflate the pipe opening sealing airbag 15 that was opened last time to a sealed state until the cooling tower 1 is cleaned. During the cleaning process, attention should also be paid to timely replenishing chemicals into the dosing mixing tank 5 to ensure a good cleaning effect.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A process for cleaning a cooling tower, characterized in that: The cooling tower is cleaned by a small circulation cleaning device for a cooling tower, which includes a circulation pump, a dosing stirring tank, a water inlet pipe of a water distribution tank, a water return pipe of a cold water tank, a plurality of pipe opening blocking air bags, an air compressor, a flow distributor, a control cabinet and a submersible pump for a cold water tank. The water inlet of the water distribution tank inlet pipe is connected to the water outlet of the dosing stirring tank, the circulation pump is arranged in the water inlet pipe of the water distribution tank, the water outlet of the water return pipe of the cold water tank is connected to the water return port of the dosing stirring tank, and the air compressor is Several of the pipe opening blocking airbags are inflated and deflated, and several of the pipe opening blocking airbags are used to block or open the water distribution pipe opening of the cooling tower, and several of the pipe opening blocking airbags are respectively connected to the air outlet of the flow distributor through air pipes, and the air compressor is connected to the air inlet of the flow distributor through an air pipe, and the control cabinet controls the flow distribution of the flow distributor and the opening and closing of the circulating pump, and the water outlet of the cold water pool submersible pump is connected to the water inlet of the cold water pool return pipe; comprising the following steps: (1) Place the circulation pump, dosing mixing tank, air compressor, flow distributor and control cabinet in a reasonable location near the cooling tower; (2) Use a gate to block the connection between the water distribution tank and the shaft, and close the water inlet valve, outlet valve and sewage gate of the cooling tower; (3) The outlet of the water inlet pipe of the water distribution tank is placed in the water distribution tank of the cooling tower, and a plurality of pipe opening plugging air bags are simply fixed in the pipe openings of a plurality of water distribution pipes connected to the water distribution tank, and the cold water pool submersible pump is placed in the cold water pool at the bottom of the cooling tower; (4) Draw a water source from the power plant circulating water to the dosing mixing tank; (5) Inflate the airbags to seal the pipe openings, seal the water distribution pipe openings, and start the submersible pump and circulating pump of the cold water tank; (6) Deflate the airbag that seals the pipe opening in the water distribution pipe that needs to be cleaned first, and the circulating water circulates to clean the water distribution pipe, the nozzle, and the filler covered by the nozzle; (7) Open the water distribution pipes that need to be cleaned in sequence, and at the same time inflate the airbags that were previously opened to a sealed state until the cooling tower is cleaned.

2. The process for cleaning a cooling tower according to claim 1, characterized in that: It also includes the step of replenishing chemicals into the dosing mixing tank during the cleaning process.

3. The process for cleaning a cooling tower according to claim 1, characterized in that: The cooling tower small circulation cleaning device also includes an energy accumulator, which is arranged on the air pipe connecting the air compressor and the flow distributor.

4. The process for cleaning a cooling tower according to any one of claims 1 to 3, characterized in that: The tube opening blocking airbag is a cylindrical rubber airbag, and an air inlet is provided on one end surface of the tube opening blocking airbag. The air inlet is connected to an air inlet cannula, and the air inlet cannula is connected to the air outlet of the flow distributor through an air pipe.

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