Energy-saving system and method for improving cooling tower capacity by using air compressor waste heat and pressure

Abstract

The present application belongs to the field of air compressor waste heat and pressure recovery, in particular to an energy-saving system and method for improving the cooling tower capacity by using air compressor waste heat and pressure, aiming at the problem that the existing air compressor waste heat is not effectively recycled and utilized, the energy is wasted due to frequent unloading and venting of the air compressor, and the outlet water temperature of the cooling tower is limited by the ambient wet-bulb temperature, the following scheme is proposed, which comprises a primary compression, the primary compression is connected with a secondary compression, a primary heat extractor and a newly added gas storage tank, the secondary compression is connected with the primary heat extractor, and the secondary compression is connected with a secondary heat extractor, the secondary heat extractor is connected with the primary heat extractor, the secondary heat extractor is connected with a tertiary compression and a tertiary heat extractor, the waste heat and pressure recovery of the present application improves the cooling effect of the air compressor cooling tower, so that the outlet water temperature of the cooling tower is lower than the ambient wet-bulb temperature, which has significant benefits for improving the compression efficiency of the air compressor, improving the safety and reliability of the system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air compressor waste heat and pressure recovery, and particularly relates to an energy-saving system and method for improving the cooling tower capacity by using air compressor waste heat and pressure. BACKGROUND

[0002] The air compressor converts electrical energy into mechanical energy through its mechanical operation structure, and the mechanical energy is converted into air potential energy to provide air power. In this process, only 15% of the energy is converted into air potential energy needed for production work, and about 80% of the energy is converted into heat. This part of heat is usually discharged by using cooling circulating water, and is not effectively utilized, resulting in a large energy waste phenomenon. The common air compressor waste heat recovery method on the market is usually to recover the air compressor waste heat to produce hot water, but many times it is difficult to find a suitable heat utilization scene. At the same time, the multi-stage air compressor usually sets an intermediate cooler to cool each stage of exhaust gas by using circulating water to reduce the suction temperature of the next stage, which can improve the compression efficiency of each stage. The more heat carried away by the circulating water, the closer to isothermal compression, the higher the compression efficiency of the air compressor, and the lower the energy consumption. Studies have shown that for every 1℃ increase in the suction temperature of the air compressor, the power consumption for producing 1m3 of compressed air will increase by 0.295%. Therefore, the air compressor waste heat is used to reduce the circulating water temperature entering the intermediate cooler to reduce the exhaust temperature and humidity of each stage of the air compressor.

[0003] In addition, due to unreasonable air compressor settings, unstable and discontinuous actual gas consumption, and other reasons, many enterprises' air compressors have the phenomenon of frequent unloading and venting, resulting in a large amount of compressed air being wasted, causing a lot of energy waste, and there are few methods for recycling the compressed air vented by the air compressor on the market.

[0004] On the other hand, the air compressor circulating cooling water system bears the important role of transferring a large amount of waste heat generated by the air compressor to the natural environment in time to ensure the normal operation of the air compressor, but also has the phenomenon of high energy consumption. The stronger the cooling capacity of the cooling tower, the lower the cooling tower outlet water temperature, which can reduce the circulating cooling water flow required by the air compressor or reduce the cooling time, thereby reducing the energy consumption of the circulating cooling water system.

[0005] The cooling tower mainly utilizes the direct or indirect contact of air and water to take away heat through water evaporation, so the outlet water temperature of the cooling tower is greatly affected by the ambient wet-bulb temperature. The wet-bulb temperature is the lowest temperature that water can reach through evaporation under the natural environment of a certain place, and this temperature is also the limit temperature value of the cooling of the cooling tower, that is, the outlet water temperature of the cooling tower will not be lower than the ambient wet-bulb temperature under normal circumstances. Therefore, reducing the wet-bulb temperature of the air entering the cooling tower can effectively reduce the outlet water temperature of the cooling tower. At the same time, the water is sprayed from top to bottom to exchange heat with air, and the size of the water droplets also has an important influence on the cooling effect of the cooling tower. The smaller the water droplets, the larger the air-water contact area, the more sufficient the heat exchange with air, and the stronger the cooling capacity of the cooling tower.

[0006] In the prior art, the waste heat of the air compressor is not effectively recycled, the energy is wasted due to frequent unloading and venting of the air compressor, and the outlet water temperature of the cooling tower is limited by the ambient wet-bulb temperature. SUMMARY

[0007] The purpose of the present application is to solve the problems of the prior art, such as the waste heat of the air compressor not being effectively recycled, the energy being wasted due to frequent unloading and venting of the air compressor, and the outlet water temperature of the cooling tower being limited by the ambient wet-bulb temperature, and to provide an energy-saving system and method for improving the cooling capacity of a cooling tower by using the waste heat and excess pressure of an air compressor.

[0008] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0009] The energy-saving system for improving the cooling capacity of a cooling tower by using the waste heat and excess pressure of an air compressor comprises a primary compression, wherein the primary compression is connected with a secondary compression, a primary heat extractor and a newly added gas storage tank; the secondary compression is connected with the primary heat extractor, and the secondary compression is connected with a secondary heat extractor; the secondary heat extractor is connected with the primary heat extractor; the secondary heat extractor is connected with a tertiary compression and a tertiary heat extractor; the tertiary heat extractor is connected with a hot water tank; the hot water tank is connected with a hot water pump; the hot water pump is connected with an absorption refrigerating machine; the newly added gas storage tank is connected with a micron-level dry fog machine; the micron-level dry fog machine is connected with a water-gas distributor; the water-gas distributor is connected with a cooling tower; the cooling tower is connected with a circulating water pump; the circulating water pump is connected with the primary heat extractor; the absorption refrigerating machine is connected with a chilled water pump and a chilled water inlet pipeline; the chilled water pump is connected with a chilled water tank; the chilled water tank is connected with a chilled water return pipeline; an air intake cooling and dehumidifying device is connected to the cooling tower; the chilled water inlet pipeline and the chilled water return pipeline are both connected with the air intake cooling and dehumidifying device.

[0010] Preferably, the hot water tank and the micron-level dry fog machine are connected through a pipeline, and a stop valve is arranged on the pipeline.

[0011] Preferably, the air intake cooling and dehumidifying device comprises a support, and an air filter screen, an adjusting damper and a surface cooler are arranged on the support.

[0012] Preferably, the air inlet of the air inlet cooling and dehumidifying device is provided with a baffle.

[0013] Preferably, the absorption refrigerating machine comprises an evaporator connected with a chilled water pump and a chilled water inlet pipeline.

[0014] Preferably, the evaporator is connected with a generator connected with a hot water pump and a micron dry fog machine.

[0015] Preferably, the cooling tower is provided with a tower top fan at the top.

[0016] Preferably, the water and air distributor is connected with a water distribution device, the water distribution device is connected with an ultrasonic atomizing nozzle, the cooling tower is provided with a water remover, and the cooling tower is provided with a water collecting pool below.

[0017] The application further provides an energy-saving method for improving the cooling capacity of a cooling tower by using the waste heat and pressure of an air compressor, comprising the following steps:

[0018] S1, by means of a newly installed venting pipeline, the compressed air unloaded and vented by the air compressor is collected into a newly added gas storage tank;

[0019] S2, the high-temperature compressed air generated after the first-stage compression, the second-stage compression and the third-stage compression of the air compressor enters a first-stage heat extractor, a second-stage heat extractor and a third-stage heat extractor in sequence, respectively, exchanges heat with another path of circulating cooling water pumped from the cooling tower through a circulating water pump in the heat exchanger, transmits heat to the circulating cooling water, reduces the exhaust temperature of the air compressor, and absorbs heat to become hot water;

[0020] S3, the circulating cooling water becomes hot water after absorbing the heat of the compressed air, is stored in a hot water tank, and enters a generator of an absorption refrigerating machine under the drive of a hot water pump, transmits heat to a refrigerant solution, reduces the temperature, and enters a micron dry fog machine, a water and air distributor and then the cooling tower for cooling together with the compressed air from the newly added gas storage tank; a stop valve is installed on the circulating water return pipeline of the cooling tower, and the stop valve is kept in a closed state during normal operation of the system, and when the absorption refrigerating machine fails, the stop valve is opened, and the circulating cooling water returns to the cooling tower through the original pipeline;

[0021] S4, the water from the chilled water tank through the chilled water pump enters the evaporator of the absorption refrigerating machine, transmits heat to the refrigerant, reduces the temperature, becomes 7-12 DEG C chilled water, and is sent to the surface cooler in the air inlet cooling and dehumidifying device installed on the support at the air inlet of the cooling tower through a chilled water inlet pipeline, exchanges heat with the new air coming through the air filter and the regulating damper, reduces the temperature and humidity of the air entering the cooling tower, and finally returns to the chilled water tank through a chilled water return pipeline for continuous circulation;

[0022] S5, under the action of the tower top fan, the new air enters the air inlet at the bottom of the cooling tower, enters the air filter screen and the adjusting damper, and then enters the surface cooler, and the temperature and humidity are reduced after heat exchange with the chilled water;

[0023] S6, the return water of the circulating cooling water of the air compressor and the compressed air from the new gas storage tank enter the micron dry fog machine, the water gas distributor, the water distribution device and the ultrasonic atomizing nozzle in sequence, form micron atomizing spray, pass through the cooling filler from top to bottom, and exchange heat with the cold dry air from bottom to top, the temperature of the circulating cooling water is reduced, and is collected in the water collecting pool; the temperature of the air is increased, and finally the air flow is recovered by the water separator after the floating drops are removed, and is discharged from the cooling tower.

[0024] In the application, the energy-saving system and method for improving the cooling tower capacity by utilizing the waste heat and pressure of the air compressor have the following beneficial effects:

[0025] 1. By reducing the air temperature entering the cooling tower of the air compressor, the cooling effect of the cooling tower can be improved, and the outlet water temperature of the cooling tower is lower than the ambient wet bulb temperature. The reduction of the circulating water temperature can improve the cooling capacity of the circulating water on the air compressor. When the heat of the air compressor is constant, the reduction of the circulating water temperature can reduce the flow of the circulating water required by the air compressor or reduce the cooling time, thereby reducing the energy consumption of the circulating water system, and improving the safety and reliability of the system.

[0026] 2. The reduction of the circulating cooling water temperature of the air compressor can significantly reduce the exhaust temperature of each stage, so that each stage of compression is closer to isothermal compression, and the power consumption of the compressor can be effectively reduced.

[0027] 3. The application utilizes waste heat to reduce the temperature and humidity of the new air entering the cooling tower, which not only recycles the waste heat, but also improves the cooling capacity of the cooling tower. The waste heat of the air compressor is recycled for itself, the comprehensive energy efficiency of the system is improved by more than 15%, and a new method for deep energy saving of the air compressor is provided.

[0028] 4. The application recycles the residual pressure of the compressed air unloaded and vented by the air compressor, forms micron atomizing spray of the circulating water, solves the problem of energy waste caused by the large amount of compressed air wasted by frequent unloading and venting of the air compressor, and further improves the cooling capacity of the cooling tower. Comprehensive utilization of waste heat and pressure can significantly reduce the outlet water temperature of the cooling tower, reduce the comprehensive energy consumption of the circulating water and the air compressor, achieve greater energy saving effect, and improve the overall efficiency of the air compression system.

[0029] 5. The absorption refrigeration machine and the surface cooler involved in the application are mature standardized products on the market, and the production and assembly are simple and the cost is controllable, so the application has good popularization significance.

[0030] The waste heat and pressure recycling system improves the cooling effect of the air compressor cooling tower, and makes the outlet water temperature of the cooling tower lower than the ambient wet bulb temperature, which has significant benefits for improving the compression efficiency of the air compressor, and improving the safety and reliability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0031] Fig. 1 A structure schematic diagram of the energy-saving system for improving the cooling capacity of the cooling tower by using the waste heat and pressure of the air compressor according to the present application;

[0032] Fig. 2 A structure schematic diagram of the air intake cooling and dehumidifying device of the energy-saving system for improving the cooling capacity of the cooling tower by using the waste heat and pressure of the air compressor according to the present application;

[0033] Fig. 3 A structure schematic diagram of the connection between the air intake cooling and dehumidifying device and the cooling tower of the energy-saving system for improving the cooling capacity of the cooling tower by using the waste heat and pressure of the air compressor according to the present application.

[0034] In the figure: 101, primary compression; 102, secondary compression; 103, tertiary compression; 104, primary heat extractor; 105, secondary heat extractor; 106, tertiary heat extractor; 107, hot water tank; 108, hot water pump; 109, venting pipeline; 110, newly added gas storage tank; 111, micron-level dry fog machine; 112, water-gas distributor; 113, circulating water pump; 114, stop valve; 200, absorption refrigeration machine; 201, evaporator; 202, generator; 300, cooling tower; 301, water separator; 302, water distribution device; 303, ultrasonic atomizing nozzle; 304, cooling filler; 305, water collecting pool; 306, tower top fan; 400, air intake cooling and dehumidifying device; 401, air filter screen; 402, adjusting damper; 403, surface cooler; 404, support; 405, baffle; 501, chilled water tank; 502, chilled water pump; 503, chilled water inlet pipeline; 504, chilled water return pipeline. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0036] REFERENCE Figs. 1-3The energy-saving system for improving the cooling capacity of the cooling tower by using the waste heat and pressure of the air compressor comprises a first compression 1, a second compression 102, a first heat extractor 104 and a new gas storage tank 110 connected with the first compression 1, a second heat extractor 105 connected with the second compression 102 and the first heat extractor 104, a third compression 103 and a third heat extractor 106 connected with the second heat extractor 105, a hot water tank 107 connected with the third heat extractor 106, a hot water pump 108 connected with the hot water tank 107, an absorption refrigerating machine 200 connected with the hot water pump 108, a micron dry fog machine 111 connected with the new gas storage tank 110, a water-gas distributor 112 connected with the micron dry fog machine 111, a cooling tower 300 connected with the water-gas distributor 112, and a circulating water pump 113 connected with the cooling tower 300 and the first heat extractor 104, the absorption refrigerating machine 200 being connected with a chilled water pump 502 and a chilled water inlet pipeline 503, the chilled water pump 502 being connected with a chilled water tank 501, the chilled water tank 501 being connected with a chilled water return pipeline 504, and the cooling tower 300 being connected with an air inlet cooling and dehumidifying device 400, the chilled water inlet pipeline 503 and the chilled water return pipeline 504 being connected with the air inlet cooling and dehumidifying device 400.

[0037] In the embodiment, the hot water tank 107 is connected with the micron dry fog machine through a pipeline, and a stop valve 114 is arranged on the pipeline.

[0038] In the embodiment, the air inlet cooling and dehumidifying device 400 comprises a support 404, and an air filter screen 401, an air adjusting door 402 and a surface cooler 403 are arranged on the support 404.

[0039] In the embodiment, a baffle 405 is arranged at the air inlet of the air inlet cooling and dehumidifying device 400.

[0040] In the embodiment, the absorption refrigerating machine 200 comprises an evaporator 201 connected with the chilled water pump 502 and the chilled water inlet pipeline 503.

[0041] In the embodiment, the evaporator 201 is connected with a generator 202 connected with the hot water pump 108 and the micron dry fog machine 111.

[0042] In the embodiment, a tower top fan 306 is arranged at the top of the cooling tower 300.

[0043] In the embodiment, the water-gas distributor 112 is connected with a water distribution device 302, the water distribution device 302 is connected with an ultrasonic atomizing nozzle 303, a water remover 301 is arranged in the cooling tower 300, and a water collecting pool 305 is arranged below the cooling tower 300.

[0044] The embodiment also proposes an energy-saving method for improving the cooling capacity of a cooling tower by using the waste heat and pressure of an air compressor, comprising the following steps:

[0045] S1. The compressed air unloaded and vented by the air compressor is collected into a newly added gas storage tank 110 through a newly installed venting pipeline 109;

[0046] S2. The high-temperature compressed air generated after the first-stage compression 101, the second-stage compression 102 and the third-stage compression 103 of the air compressor enters the first-stage heat extractor 104, the second-stage heat extractor 105 and the third-stage heat extractor 106 in sequence, respectively, and exchanges heat with another path of circulating cooling water pumped from the cooling tower 300 by the circulating water pump 113, so as to transfer the heat to the circulating cooling water, reduce the exhaust temperature of the air compressor and make the circulating cooling water become hot water by absorbing heat;

[0047] S3. The circulating cooling water becomes hot water by absorbing the heat of the compressed air, is stored in the hot water tank 107 and enters the generator 202 of the absorption refrigerating machine 200 under the drive of the hot water pump 108, and the temperature is reduced by transferring the heat to the refrigerant solution, and then the compressed air from the newly added gas storage tank 110 enters the micron-level dry fog machine 111, the water-gas distributor 112 and then the cooling tower in sequence; the original circulating water is returned to the water return pipeline of the cooling tower, and a stop valve 114 is installed on the pipeline; when the system is normally operated, the stop valve 114 is kept closed; when the absorption refrigerating machine 200 fails, the stop valve 114 is opened, and the circulating cooling water is returned to the cooling tower in the original pipeline;

[0048] S4. The water from the chilled water tank 501 enters the evaporator 201 of the absorption refrigerating machine 200, the temperature is reduced by transferring the heat to the refrigerant, becomes 7-12℃ chilled water, and is sent to the surface cooler 403 in the air inlet cooling and dehumidifying device 400 installed on the support 404 at the air inlet of the cooling tower 300 through the chilled water inlet pipeline 503, exchanges heat with the new air coming from the air filter 401 and the air adjusting door 402, reduces the temperature and humidity of the air entering the cooling tower, and finally returns to the chilled water tank 501 through the chilled water return pipeline 504 to continue the circulation;

[0049] S5. The new air enters the air inlet cooling and dehumidifying device 400 installed in the tower under the action of the tower top fan 306 from the air inlet at the bottom of the cooling tower 300, exchanges heat with the chilled water in the surface cooler 403 after passing through the air filter 401 and the air adjusting door 402, and the temperature and humidity are reduced;

[0050] S6, the return water of the circulating cooling water of the air compressor and the compressed air from the newly added gas storage tank 110 enter the micron dry fog machine 111, the water-gas distributor 112, the water distribution device 302 and the ultrasonic atomizing nozzle 303 in turn, to form micron atomized spray, which passes through the cooling filler 304 from top to bottom and exchanges heat with the cold dry air from bottom to top, so that the temperature of the circulating cooling water is reduced, and the circulating cooling water is collected in the water collecting tank 305; the temperature of the air is increased, and finally the air flow with entrained droplets is recovered by the water trap 301 and discharged from the cooling tower.

[0051] As Fig. 2 , the air inlet cooling and dehumidifying device 400 includes an air filter 401, an adjusting damper 402 and a surface cooler 403, the air filter 401 is used to remove impurities in the air; the adjusting damper 402 is used to adjust the amount of air entering the air inlet cooling and dehumidifying device 400, so as to adjust the temperature and humidity of the air entering the cooling tower 300; the surface cooler 403 is used to reduce the temperature and humidity of the air entering the cooling tower 300;

[0052] As Fig. 3 , the air inlet cooling and dehumidifying device 400 is uniformly arranged at the inner wall surface of the air inlet of the cooling tower 300, and a baffle 405 is installed at the air inlet where no air inlet cooling and dehumidifying device is arranged, so as to avoid the air without cooling and dehumidification from entering the cooling tower, in the embodiment, the number of the air inlet cooling and dehumidifying device 400 is 6, which is uniformly arranged along the inner wall surface of the air inlet, and in the actual implementation process, the number of the air inlet cooling and dehumidifying device can be adjusted according to the structure and size of the cooling tower.

[0053] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. Energy saving system for improving cooling capacity of cooling tower by using waste heat and pressure of air compressor, comprising a primary compressor (1), characterized in that, The primary compression (1) is connected with a secondary compression (102), a primary heat extractor (104) and a new gas storage tank (110), the secondary compression (102) is connected with the primary heat extractor (104), and the secondary compression (102) is connected with a secondary heat extractor (105), the secondary heat extractor (105) is connected with the primary heat extractor (104), the secondary heat extractor (105) is connected with a tertiary compression (103) and a tertiary heat extractor (106), the tertiary heat extractor (106) is connected with a hot water tank (107), the hot water tank (107) is connected with a hot water pump (108), the hot water pump (108) is connected with an absorption refrigeration machine (200), the new gas storage tank (110) is connected with a micron dry fog machine (111), the micron dry fog machine (111) is connected with a water and gas distributor (112), the water and gas distributor (112) is connected with a cooling tower (300), the cooling tower (300) is connected with a circulating water pump (113), the circulating water pump (113) is connected with the primary heat extractor (104), the absorption refrigeration machine (200) is connected with a chilled water pump (502) and a chilled water inlet pipeline (503), the chilled water pump (502) is connected with a chilled water tank (501), the chilled water tank (501) is connected with a chilled water return pipeline (504), and the cooling tower (300) is connected with an air inlet cooling and dehumidifying device (400), the chilled water inlet pipeline (503) and the chilled water return pipeline (504) are connected with the air inlet cooling and dehumidifying device (400).

2. The energy-saving system for improving the cooling capacity of a cooling tower by using the waste heat and pressure of an air compressor according to claim 1, characterized in that, The hot water tank (107) is connected with the micron dry fog machine through a pipeline, and a stop valve (114) is arranged on the pipeline.

3. The energy-saving system for improving the cooling capacity of a cooling tower by using the waste heat and pressure of an air compressor according to claim 2, characterized in that, The air inlet cooling and dehumidifying device (400) comprises a support (404), and an air filter screen (401), an air adjusting door (402) and a surface cooler (403) are arranged on the support (404).

4. The energy-saving system for improving the cooling capacity of a cooling tower by using the waste heat and pressure of an air compressor according to claim 3, characterized in that, A baffle (405) is arranged at the air inlet of the air inlet cooling and dehumidifying device (400).

5. The energy-saving system for improving the cooling capacity of a cooling tower by using the waste heat and waste pressure of an air compressor machine according to claim 4, characterized in that, The absorption refrigeration machine (200) comprises an evaporator (201), and the evaporator (201) is connected with the chilled water pump (502) and the chilled water inlet pipeline (503).

6. The energy-saving system for improving the cooling capacity of a cooling tower by using the waste heat and waste pressure of an air compressor machine according to claim 5, characterized in that, The evaporator (201) is connected with a generator (202), and the generator (202) is connected with the hot water pump (108) and the micron dry fog machine (111).

7. The energy-saving system for improving the cooling capacity of a cooling tower by using the waste heat and pressure of an air compressor according to claim 6, characterized in that, A tower top fan (306) is arranged at the top of the cooling tower (300).

8. The energy-saving system for improving the cooling capacity of a cooling tower by using the waste heat and pressure of an air compressor according to claim 7, characterized in that, The water and gas distributor (112) is connected with a water distribution device (302), the water distribution device (302) is connected with an ultrasonic atomizing nozzle (303), a water remover (301) is arranged in the cooling tower (300), and a water collecting pool (305) is arranged below the cooling tower (300).

9. An energy-saving method for improving the cooling capacity of a cooling tower by using the waste heat and pressure of an air compressor, characterized in that, The method comprises the following steps: S1, through a newly installed venting pipeline (109), the compressed air unloaded and vented by the air compressor is collected into the new gas storage tank (110). S2, the high-temperature compressed air produced after the first-stage compression (101), the second-stage compression (102) and the third-stage compression (103) of the air compressor enters the first-stage heat exchanger (104), the second-stage heat exchanger (105) and the third-stage heat exchanger (106) in sequence, respectively, exchanges heat with another circulating cooling water pumped from the cooling tower (300) by the circulating water pump (113) in the heat exchanger, and transfers heat to the circulating cooling water, so that the exhaust temperature of the air compressor is reduced and the circulating cooling water is changed into hot water by absorbing heat; S3, the circulating cooling water is changed into hot water by absorbing heat of the compressed air, is stored in the hot water tank (107), and enters the generator (202) of the absorption refrigerator (200) under the drive of the hot water pump (108), and the temperature of the circulating cooling water is reduced by transferring heat to the refrigerant solution, and the circulating cooling water and the compressed air from the new gas storage tank (110) enter the micron dry fog machine (111), the water-air distributor (112) and then the cooling tower in sequence; S4, the water from the chilled water tank (501) through the chilled water pump (502) enters the evaporator (201) of the absorption refrigerator (200), and the temperature of the water is reduced by transferring heat to the refrigerant, and the water is changed into chilled water with a temperature of 7-12℃, and is sent to the cooling tower (300) through the chilled water inlet pipeline (503) and the surface cooler (403) installed on the bracket (404) in the air inlet cooling and dehumidifying device (400), and exchanges heat with the new air coming through the air filter screen (401) and the air adjusting door (402), so that the temperature and humidity of the air entering the cooling tower are reduced, and finally the chilled water is returned to the chilled water tank (501) through the chilled water return pipeline (504) to continue circulation; S5, the new air enters the air inlet cooling and dehumidifying device (400) installed in the cooling tower (300) under the action of the tower top fan (306), and exchanges heat with the chilled water in the surface cooler (403) after passing through the air filter screen (401) and the air adjusting door (402), so that the temperature and humidity of the air are reduced; S6, the return water of the air compressor circulating cooling water and the compressed air from the new gas storage tank (110) enter the micron dry fog machine (111), the water-air distributor (112), the water distribution device (302) and the ultrasonic atomizing nozzle (303) in sequence, form micron atomizing spray, pass through the cooling filler (304) from top to bottom, exchange heat with the cold and dry air from bottom to top, the temperature of the circulating cooling water is reduced, and the circulating cooling water is collected in the water collecting pool (305); the temperature of the air is increased, and finally the air flow is recovered by the water separator (301) after the air flow is recovered by the water separator (301), and the air flow is recovered by the water separator (301).

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