Water-gas dual-purpose evaporative cooling and waste heat recovery system for air compression station

Abstract

The utility model discloses a water-gas dual-purpose evaporative cooling and waste heat recovery system for an air compression station, which comprises an indirect evaporative cooler, and primary air of the indirect evaporative cooler is connected with an inlet of an air compressor through a primary air outlet pipe. A compressed air outlet of the air compressor is connected with a primary air inlet of the indirect evaporative cooler, one end of a generator of the absorption heat pump is connected with the indirect evaporative cooler through a pipeline, the other end of the generator of the absorption heat pump is connected with one end of an intermediate cooling pipe, and the intermediate cooling pipe is located in the air compressor. The other end of the middle cooling pipe penetrates out of the air compressor and then is connected with the indirect evaporative cooler. The indirect evaporative cooler is adopted to perform equal-humidity cooling on sucked air of the air compressor, air temperature rise work doing in the air compression process of the air compressor is reduced, the air compression efficiency of the air compressor is improved, and energy consumption is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of cooling and heat dissipation process systems, and relates to a water-air dual-use evaporative cooling and waste heat recovery system for air compressor stations. Background Technology

[0002] Air compressors are widely used in various industrial fields such as textile mills, petrochemicals, power, and metallurgy. As a gas-powered device, they account for a large proportion of energy consumption in industrial production.

[0003] Currently, energy conservation and consumption reduction in air compressor stations mainly focus on adding frequency conversion control to air compressors, adding air storage tanks, improving pipeline networks, and rationally using air. However, methods such as reducing the intake temperature of air compressors, reducing the moisture content of intake air to improve the efficiency of air compressors and reduce energy consumption, as well as recovering waste heat from intermediate high-temperature cooling water, have not yet emerged. Utility Model Content

[0004] The purpose of this invention is to provide a water-air dual-purpose evaporative cooling and waste heat recovery system for air compressor stations. It uses an indirect evaporative cooler to perform isohumid cooling of the air intake of the air compressor, thereby reducing the work done by the air temperature rise during the air compressor compression process, improving the air compressor compression efficiency and reducing energy consumption.

[0005] The technical solution adopted in this utility model is a water-air dual-purpose evaporative cooling and waste heat recovery system for an air compressor station, including an indirect evaporative cooler. The primary air of the indirect evaporative cooler is connected to the inlet of the air compressor through a primary air outlet pipe. The compressed air outlet of the air compressor is connected to the primary air inlet of the indirect evaporative cooler. It also includes an absorption heat pump. One end of the generator of the absorption heat pump is connected to the indirect evaporative cooler through a pipe. The other end of the generator of the absorption heat pump is connected to one end of an intermediate cooling pipe. The intermediate cooling pipe is located inside the air compressor. The other end of the intermediate cooling pipe passes through the air compressor and is connected to the indirect evaporative cooler.

[0006] The present invention is further characterized in that:

[0007] The indirect evaporative cooler includes a shell. Primary air inlets and outlets are respectively located on the lower and upper sides of the corresponding side walls of the shell. A secondary air outlet is also located on the upper side wall of the shell where the primary air inlet is located, and a secondary air inlet is also located on the side wall of the shell below the primary air inlet. Multiple vertical heat exchange tubes are evenly arranged in the middle of the shell. The secondary air inlet is connected to the multiple vertical heat exchange tubes in parallel via pipes. A circulating water tank is located at the bottom of the shell, and the circulating water tank is connected to the intermediate cooling tubes via pipes. Above the vertical heat exchange tubes, a direct water distributor and a secondary fan are arranged in the shell from bottom to top. The direct water distributor is connected to one end of the generator via a circulating water pipe.

[0008] The primary air inlet is located on the side wall of the shell, corresponding to the bottom of the vertical heat exchange tube.

[0009] The direct water distributor in the pipe includes multiple water distribution pipes connected to the circulating water pipe. The water distribution pipes are set one-to-one with the vertical heat exchange tubes. The end of the water distribution pipe away from the circulating water pipe extends into the upper part of the corresponding vertical heat exchange tube. Multiple water distribution holes are set around the circumference of the end of the water distribution pipe that extends into the vertical heat exchange tube.

[0010] The diameter of the vertical heat exchange tube gradually decreases from top to bottom, forming a frustum-shaped cylindrical structure.

[0011] A primary air inlet pipe is connected to the outer side wall of the housing corresponding to the primary air inlet.

[0012] The compressed air outlet of the air compressor is connected to a compressed air supply pipe. One end of the compressed air supply pipe near the compressed air outlet is also connected to a compressed air return pipe, and the other end of the compressed air return pipe is connected to the primary air inlet pipe.

[0013] A circulating water pump is also installed on the pipe between the circulating water tank and the intermediate cooling pipe.

[0014] The beneficial effects of this utility model are:

[0015] This invention employs an indirect evaporative cooler to cool the intake air of an air compressor using a constant humidity method, reducing the work done by the air temperature rise during the air compressor's compression process, thereby improving the compressor's efficiency and reducing energy consumption. Utilizing the relatively dry nature of compressed air and its adiabatic expansion cooling characteristic, this invention mixes a small amount of compressed air with the intake air of the indirect evaporative cooler, further reducing the temperature and moisture content of the air supplied to the air compressor by the indirect evaporative cooler, thus improving the compressor's efficiency and reducing energy consumption. This invention also employs an absorption heat pump to recover high-temperature waste heat from the compressor's intermediate cooling water, followed by secondary cooling using an indirect evaporative cooler, improving the cooling effect of the intermediate cooling water. This achieves heat recovery, energy cascade utilization, and the production of domestic hot water or air conditioning chilled water. The indirect evaporative cooler used in this invention is a counter-flow, vertical tube type with "thicker at the top and thinner at the bottom" heat exchange tubes, effectively improving heat exchange efficiency, alleviating heat exchanger blockage, and enhancing the stability of the circulating water film adhesion. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the water-air dual-purpose evaporative cooling and waste heat recovery system for air compressor stations.

[0017] In the diagram: 1. Direct water distributor inside the pipe, 2. Indirect evaporative cooler, 3. Primary air flow channel, 4. Vertical heat exchange tube, 5. Primary air inlet, 6. Secondary air inlet, 7. Compressed air return pipe, 8. Circulating water tank, 9. Circulating water pump, 10. Intermediate cooling water, 11. Intermediate cooling pipe, 12. Compressed air supply pipe, 13. Absorption heat pump, 14. Evaporator, 15. Air conditioning chilled water / domestic hot water return pipe, 16. Air conditioning chilled water / domestic hot water supply pipe, 17. Generator, 18. Primary air outlet pipe, 19. Circulating water pipe, 20. Secondary fan, 21. Secondary air outlet, 22. Air compressor, 23. Water distribution pipe, 24. Water distribution hole, 25. Primary air inlet pipe. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0019] Example 1

[0020] This utility model is a water-air dual-purpose evaporative cooling and waste heat recovery system for air compressor stations, and its structure is as follows: Figure 1 As shown, it includes an indirect evaporative cooler 2. The primary air of the indirect evaporative cooler 2 is connected to the inlet of an air compressor 22 through a primary air outlet pipe 18. The compressed air outlet of the air compressor 22 is connected to the primary air inlet 5 of the indirect evaporative cooler 2. It also includes an absorption heat pump 13. One end of the generator 17 of the absorption heat pump 13 is connected to the indirect evaporative cooler 2 through a pipe. The other end of the generator 17 of the absorption heat pump 13 is connected to one end of an intermediate cooling pipe 11. The intermediate cooling pipe 11 is located inside the air compressor 22. The other end of the intermediate cooling pipe 11 passes through the air compressor 22 and is connected to the indirect evaporative cooler 2.

[0021] The indirect evaporative cooler 2 includes a shell. Primary air inlets 5 and primary air outlets are respectively provided on the lower and upper sides of the corresponding side walls of the shell. A secondary air outlet 21 is also provided on the upper side wall of the shell where the primary air inlet 5 is provided. A secondary air inlet 6 is also provided on the side wall of the shell where the primary air inlet 5 is provided below the primary air inlet 5. Multiple vertical heat exchange tubes 4 are evenly arranged in the middle of the shell. The secondary air inlet 6 is connected to the multiple vertical heat exchange tubes 4 in parallel through pipes. A circulating water tank 8 is provided at the bottom of the shell. The circulating water tank 8 is connected to the intermediate cooling pipe 11 through pipes. In the shell above the vertical heat exchange tubes 4, a direct water distributor 1 and a secondary fan 20 are arranged in order from bottom to top. The direct water distributor 1 is connected to one end of the generator 17 through a circulating water pipe 19. The primary air flow channel 3 is located outside the vertical heat exchange tubes 4 in the shell.

[0022] The diameter of the vertical heat exchange tube 4 gradually decreases from top to bottom, forming a frustum cylindrical structure. In other words, the vertical heat exchange tube 4 is a "thicker at the top and thinner at the bottom" type of vertical heat exchange tube.

[0023] The working principle of this embodiment is as follows:

[0024] Intermediate cooling water flow: After absorbing heat from the compressed air in the air compressor 22, the intermediate cooling water 10 increases in temperature and enters the generator 17 of the absorption heat pump 13 to release heat. Then, it is directly sprayed onto the inner wall of the "wider at the top, narrower at the bottom" eccentric heat exchanger tube 4 through the circulating water pipe 19 by the direct water distributor 1. Because the eccentric heat exchanger tube 4 is a "wider at the top, narrower at the bottom" eccentric tube, the intermediate cooling water 10 adheres stably to the inner wall of the tube. Under gravity, it flows downwards and contacts the secondary air flowing upwards in the tube in a counter-current flow, resulting in heat and mass exchange. Some water evaporates and absorbs heat, lowering the temperature of the secondary air and the water film. The water film indirectly exchanges heat with the primary air in the primary air flow channel 3 in a counter-current flow, lowering the primary air temperature. Under gravity, it falls into the circulating water tank 8. Under the action of the circulating water pump 9, the intermediate cooling water 10 re-enters the air compressor 22 through the intermediate cooling pipe 11 to absorb heat from the compressed air in an intermediate cooling manner.

[0025] Compressed air process: Under the suction action of air compressor 22, outdoor air enters through primary air inlet 5 and mixes with compressed air in compressed air outlet of air compressor 22. The compressed air expands adiabatically, which reduces the humidity and temperature of the air. The air enters the primary air flow channel 3 of indirect evaporative cooler 2 and flows from bottom to top. It indirectly exchanges heat with the circulating water film in the "coarse at the top and fine at the bottom" eccentric vertical tube heat exchanger 4, which further reduces the temperature. It then enters the air compressor through primary air outlet pipe 18. After multi-stage compression and intermediate drying and cooling by air compressor 22, it becomes high-pressure air that meets the parameter requirements. Most of the high-pressure air is delivered to the applicable location through the outlet of air compressor 22, and a small part enters the primary air inlet 5 and mixes with outdoor air. It expands adiabatically and does work to cool and dehumidify the air.

[0026] Secondary air flow of the indirect evaporative cooler: Under the power of the secondary fan 20, outdoor air enters the indirect evaporative cooler 2 through the secondary air inlet 6, flows from bottom to top in the vertical heat exchange tube 4, and comes into countercurrent contact with the circulating water film attached to the "larger at the top and thinner at the bottom" vertical heat exchange tube 4, resulting in heat and mass exchange. Some water evaporates and absorbs heat, which reduces the temperature of the secondary air and the water film. Finally, it is discharged through the secondary air outlet 21 via the secondary fan 20.

[0027] Example 2

[0028] Based on Example 1, the primary air inlet 5 is provided on the side wall of the shell corresponding to the bottom of the vertical heat exchange tube 4.

[0029] Example 3

[0030] This utility model is a water-air dual-purpose evaporative cooling and waste heat recovery system for air compressor stations, and its structure is as follows: Figure 1 As shown, it includes an indirect evaporative cooler 2. The primary air of the indirect evaporative cooler 2 is connected to the inlet of an air compressor 22 through a primary air outlet pipe 18. The compressed air outlet of the air compressor 22 is connected to the primary air inlet 5 of the indirect evaporative cooler 2. It also includes an absorption heat pump 13. One end of the generator 17 of the absorption heat pump 13 is connected to the indirect evaporative cooler 2 through a pipe. The other end of the generator 17 of the absorption heat pump 13 is connected to one end of an intermediate cooling pipe 11. The intermediate cooling pipe 11 is located inside the air compressor 22. The other end of the intermediate cooling pipe 11 passes through the air compressor 22 and is connected to the indirect evaporative cooler 2.

[0031] The indirect evaporative cooler 2 includes a shell. Primary air inlets 5 and primary air outlets are respectively provided on the lower and upper sides of the corresponding side walls of the shell. A secondary air outlet 21 is also provided on the upper side wall of the shell where the primary air inlet 5 is provided. A secondary air inlet 6 is also provided on the side wall of the shell where the primary air inlet 5 is provided below the primary air inlet 5. Multiple vertical heat exchange tubes 4 are evenly arranged in the middle of the shell. The secondary air inlet 6 is connected to the multiple vertical heat exchange tubes 4 in parallel through pipes. A circulating water tank 8 is provided at the bottom of the shell. The circulating water tank 8 is connected to the intermediate cooling pipe 11 through pipes. In the shell above the vertical heat exchange tubes 4, a direct water distributor 1 and a secondary fan 20 are arranged in order from bottom to top. The direct water distributor 1 is connected to one end of the generator 17 through a circulating water pipe 19. The primary air flow channel 3 is located outside the vertical heat exchange tubes 4 in the shell.

[0032] The diameter of the vertical heat exchange tube 4 gradually decreases from top to bottom, forming a frustum cylindrical structure. In other words, the vertical heat exchange tube 4 is a "thicker at the top and thinner at the bottom" type of vertical heat exchange tube.

[0033] The direct water distributor 1 includes multiple water distribution pipes 23 connected to the circulating water pipe 19. The water distribution pipes 23 are arranged one-to-one with the vertical heat exchange tubes 4. The end of the water distribution pipe 23 facing away from the circulating water pipe 19 extends into the upper part of the corresponding vertical heat exchange tube 4. Multiple water distribution holes 24 are arranged around the circumference of the end of the water distribution pipe 23 that extends into the vertical heat exchange tube 4.

[0034] The working principle of this embodiment is as follows:

[0035] Intermediate cooling water flow: After absorbing heat from the compressed air in the air compressor 22, the intermediate cooling water 10 increases in temperature and enters the generator 17 of the absorption heat pump 13 to release heat. Then, it is directly sprayed onto the inner wall of the "wider at the top, narrower at the bottom" eccentric heat exchanger tube 4 via the circulating water pipe 19 and the direct water distributor 1. Because the eccentric heat exchanger tube 4 has a "wider at the top, narrower at the bottom" eccentric diameter, the intermediate cooling water 10 adheres stably to the inner wall of the tube. Under gravity, it flows downwards and counter-currently contacts the secondary air flowing upwards within the tube, resulting in heat and mass exchange. Some water evaporates and absorbs heat, lowering the temperature of the secondary air and the water film. The water film indirectly exchanges heat with the primary air in the primary air flow channel 3, lowering the primary air temperature. Under gravity, it falls into the circulating water tank 8. Driven by the circulating water pump 9, the intermediate cooling water 10 re-enters the air compressor 22 through the intermediate cooling pipe 11 to absorb heat from the compressed air.

[0036] Compressed air process: Under the suction action of air compressor 22, outdoor air enters through primary air inlet 5 and mixes with compressed air in compressed air outlet of air compressor 22. The compressed air expands adiabatically, which reduces the humidity and temperature of the air. The air enters the primary air flow channel 3 of indirect evaporative cooler 2 and flows from bottom to top. It indirectly exchanges heat with the circulating water film in the "coarse at the top and fine at the bottom" eccentric vertical tube heat exchanger 4, which further reduces the temperature. It then enters the air compressor through primary air outlet pipe 18. After multi-stage compression and intermediate drying and cooling by air compressor 22, it becomes high-pressure air that meets the parameter requirements. Most of the high-pressure air is delivered to the applicable location through the outlet of air compressor 22, and a small part enters the primary air inlet 5 and mixes with outdoor air. It expands adiabatically and does work to cool and dehumidify the air.

[0037] Secondary air flow of the indirect evaporative cooler: Under the power of the secondary fan 20, outdoor air enters the indirect evaporative cooler 2 through the secondary air inlet 6, flows from bottom to top in the vertical heat exchange tube 4, and comes into countercurrent contact with the circulating water film attached to the "larger at the top and thinner at the bottom" vertical heat exchange tube 4, resulting in heat and mass exchange. Some water evaporates and absorbs heat, which reduces the temperature of the secondary air and the water film. Finally, it is discharged through the secondary air outlet 21 via the secondary fan 20.

[0038] The working principle of the direct water distributor 1 in the pipe is as follows:

[0039] The circulating water in the circulating water pipe 19 is sprayed directly onto the inner wall of the vertical heat exchange tube 4 through each water distribution pipe 23 and water distribution hole 24.

[0040] Example 3

[0041] This utility model is a water-air dual-purpose evaporative cooling and waste heat recovery system for air compressor stations, and its structure is as follows: Figure 1As shown, it includes an indirect evaporative cooler 2. The primary air of the indirect evaporative cooler 2 is connected to the inlet of an air compressor 22 through a primary air outlet pipe 18. The compressed air outlet of the air compressor 22 is connected to the primary air inlet 5 of the indirect evaporative cooler 2. It also includes an absorption heat pump 13. One end of the generator 17 of the absorption heat pump 13 is connected to the indirect evaporative cooler 2 through a pipe. The other end of the generator 17 of the absorption heat pump 13 is connected to one end of an intermediate cooling pipe 11. The intermediate cooling pipe 11 is located inside the air compressor 22. The other end of the intermediate cooling pipe 11 passes through the air compressor 22 and is connected to the indirect evaporative cooler 2.

[0042] The indirect evaporative cooler 2 includes a shell. Primary air inlets 5 and primary air outlets are respectively provided on the lower and upper sides of the corresponding side walls of the shell. A secondary air outlet 21 is also provided on the upper side wall of the shell where the primary air inlet 5 is provided. A secondary air inlet 6 is also provided on the side wall of the shell where the primary air inlet 5 is provided below the primary air inlet 5. Multiple vertical heat exchange tubes 4 are evenly arranged in the middle of the shell. The secondary air inlet 6 is connected to the multiple vertical heat exchange tubes 4 in parallel through pipes. A circulating water tank 8 is provided at the bottom of the shell. The circulating water tank 8 is connected to the intermediate cooling pipe 11 through pipes. In the shell above the vertical heat exchange tubes 4, a direct water distributor 1 and a secondary fan 20 are arranged in order from bottom to top. The direct water distributor 1 is connected to one end of the generator 17 through a circulating water pipe 19. The primary air flow channel 3 is located outside the vertical heat exchange tubes 4 in the shell.

[0043] The diameter of the vertical heat exchange tube 4 gradually decreases from top to bottom, forming a frustum cylindrical structure. In other words, the vertical heat exchange tube 4 is a "thicker at the top and thinner at the bottom" type of vertical heat exchange tube.

[0044] The direct water distributor 1 includes multiple water distribution pipes 23 connected to the circulating water pipe 19. The water distribution pipes 23 are arranged one-to-one with the vertical heat exchange tubes 4. The end of the water distribution pipe 23 facing away from the circulating water pipe 19 extends into the upper part of the corresponding vertical heat exchange tube 4. Multiple water distribution holes 24 are arranged around the circumference of the end of the water distribution pipe 23 that extends into the vertical heat exchange tube 4.

[0045] A primary air inlet pipe 25 is connected to the outer side wall of the housing corresponding to the primary air inlet 5.

[0046] The compressed air outlet of the air compressor 22 is connected to a compressed air supply pipe 12. One end of the compressed air supply pipe 12 near the compressed air outlet is also connected to a compressed air return pipe 7. The other end of the compressed air return pipe 7 is connected to the primary air inlet pipe 25.

[0047] The working principle of this embodiment is as follows:

[0048] Intermediate cooling water flow: After absorbing heat from the compressed air in the air compressor 22, the intermediate cooling water 10 increases in temperature and enters the generator 17 of the absorption heat pump 13 to release heat. Then, it is directly sprayed onto the inner wall of the "wider at the top, narrower at the bottom" eccentric heat exchanger tube 4 via the circulating water pipe 19 and the direct water distributor 1. Because the eccentric heat exchanger tube 4 has a "wider at the top, narrower at the bottom" eccentric diameter, the intermediate cooling water 10 adheres stably to the inner wall of the tube. Under gravity, it flows downwards and counter-currently contacts the secondary air flowing upwards within the tube, resulting in heat and mass exchange. Some water evaporates and absorbs heat, lowering the temperature of the secondary air and the water film. The water film indirectly exchanges heat with the primary air in the primary air flow channel 3, lowering the primary air temperature. Under gravity, it falls into the circulating water tank 8. Driven by the circulating water pump 9, the intermediate cooling water 10 re-enters the air compressor 22 through the intermediate cooling pipe 11 to absorb heat from the compressed air.

[0049] Compressed air process: Under the suction action of air compressor 22, outdoor air enters through primary air inlet 5 and mixes with compressed air in compressed air outlet of air compressor 22. The compressed air expands adiabatically, which reduces the humidity and temperature of the air. The air enters the primary air flow channel 3 of indirect evaporative cooler 2 and flows from bottom to top. It indirectly exchanges heat with the circulating water film in the "coarse at the top and fine at the bottom" eccentric vertical tube heat exchanger 4, which further reduces the temperature. It then enters the air compressor through primary air outlet pipe 18. After multi-stage compression and intermediate drying and cooling by air compressor 22, it becomes high-pressure air that meets the parameter requirements. Most of the high-pressure air is delivered to the applicable location through compressed air supply pipe 12, and a small part is mixed with outdoor air through compressed air return pipe 7. The air expands adiabatically and does work, cooling and dehumidifying the air.

[0050] Secondary air flow of the indirect evaporative cooler: Under the power of the secondary fan 20, outdoor air enters the indirect evaporative cooler 2 through the secondary air inlet 6, flows from bottom to top in the vertical heat exchange tube 4, and comes into countercurrent contact with the circulating water film attached to the "larger at the top and thinner at the bottom" vertical heat exchange tube 4, resulting in heat and mass exchange. Some water evaporates and absorbs heat, which reduces the temperature of the secondary air and the water film. Finally, it is discharged through the secondary air outlet 21 via the secondary fan 20.

[0051] The working principle of the direct water distributor 1 in the pipe is as follows:

[0052] The circulating water in the circulating water pipe 19 is sprayed directly onto the inner wall of the vertical heat exchange tube 4 through each water distribution pipe 23 and water distribution hole 24.

[0053] Example 4

[0054] Based on Example 3, a circulating water pump 9 is also installed on the pipe between the circulating water tank 8 and the intermediate cooling pipe 11.

[0055] Example 5

[0056] Based on Example 4, the absorption heat pump 13 uses the high-temperature waste heat of the intermediate cooling water 10 to produce air conditioning chilled water or domestic hot water, which circulates between the place of use and the air compressor station through the air conditioning chilled water / domestic hot water supply pipe 16 and the air conditioning chilled water / domestic hot water return pipe 15 of the evaporator 14 of the absorption heat pump 13.

[0057] Example 6

[0058] Based on Example 4, the intermediate cooling pipe 11 is S-shaped inside the air compressor 22.

[0059] This invention employs an indirect evaporative cooler 2 to perform isohumidified cooling of the air intake of the air compressor, thereby reducing the work done during the air compressor's compression process, improving the air compressor's compression efficiency, and reducing energy consumption.

[0060] This invention utilizes the characteristics of compressed air being relatively dry and undergoing adiabatic expansion and cooling to mix a small amount of compressed air with the primary air inlet 5 of the indirect evaporative cooler 2 through the compressed air return pipe 7, thereby further reducing the temperature and moisture content of the air supplied by the indirect evaporative cooler 2 to the air compressor, thus improving the air compressor's compression efficiency and reducing energy consumption.

[0061] This utility model uses an absorption heat pump 13 to recover high-temperature waste heat from the intermediate cooling water 10 of the compressor, and then uses an indirect evaporative cooler 2 for secondary cooling, thereby improving the cooling effect of the intermediate cooling water 10 and realizing heat recovery, energy cascade utilization, and production of domestic hot water or air conditioning chilled water.

[0062] The indirect evaporative cooler 2 used in this invention is a counter-flow type "coarse at the top and thin at the bottom" vertical heat exchange tube 4, which breaks the limitation of the heat exchange efficiency of the traditional cross-flow channel, effectively improves the heat exchange efficiency, alleviates heat exchanger blockage, and enhances the stability of the circulating water film adhesion.

[0063] The indirect evaporative cooler 2 of this utility model adopts an in-pipe direct water distributor 1, which avoids the splashing problem of traditional spray-type water distribution, stabilizes water distribution, and reduces the energy consumption of the circulating water pump 9.

Claims

1. A water-gas dual-purpose evaporative cooling and waste heat recovery system for air compressor stations, characterized in that, The system includes an indirect evaporative cooler (2), the primary air of which is connected to the inlet of an air compressor (22) via a primary air outlet pipe (18), and the compressed air outlet of the air compressor (22) connected to the primary air inlet (5) of the indirect evaporative cooler (2). It also includes an absorption heat pump (13), one end of the generator (17) of the absorption heat pump (13) is connected to the indirect evaporative cooler (2) via a pipe, and the other end of the generator (17) of the absorption heat pump (13) is connected to one end of an intermediate cooling pipe (11), which is located inside the air compressor (22), and the other end of the intermediate cooling pipe (11) extends out of the air compressor (22) and is connected to the indirect evaporative cooler (2).

2. The water-gas dual-purpose evaporative cooling and waste heat recovery system for an air compressor station according to claim 1, characterized in that, The indirect evaporative cooler (2) includes a shell. A primary air inlet (5) and a primary air outlet are respectively provided on the lower and upper sides of the corresponding side walls of the shell. A secondary air outlet (21) is also provided on the upper side wall of the shell where the primary air inlet (5) is provided. A secondary air inlet (6) is also provided on the side wall of the shell where the primary air inlet (5) is provided below the primary air inlet (5). Multiple vertical heat exchange tubes (4) are evenly arranged in the middle of the shell. The secondary air inlet (6) is connected to the multiple vertical heat exchange tubes (4) in parallel through pipes. A circulating water tank (8) is provided at the bottom of the shell. The circulating water tank (8) is connected to the intermediate cooling pipe (11) through pipes. A pipe direct water distributor (1) and a secondary fan (20) are arranged in the shell above the vertical heat exchange tubes (4) in order from bottom to top. The pipe direct water distributor (1) is connected to one end of the generator (17) through a circulating water pipe (19).

3. The water-gas dual-purpose evaporative cooling and waste heat recovery system for an air compressor station according to claim 2, characterized in that, The primary air inlet (5) is located on the side wall of the shell, corresponding to the bottom of the vertical heat exchange tube (4).

4. The water-gas dual-purpose evaporative cooling and waste heat recovery system for an air compressor station according to claim 2, characterized in that, The in-pipe direct water distributor (1) includes multiple water distribution pipes (23) connected to the circulating water pipe (19). The water distribution pipes (23) are arranged in a one-to-one correspondence with the vertical heat exchange pipes (4). The end of the water distribution pipe (23) away from the circulating water pipe (19) extends into the upper part of the corresponding vertical heat exchange pipe (4). The end of the water distribution pipe (23) that extends into the vertical heat exchange pipe (4) is provided with multiple water distribution holes (24) around its circumference.

5. The water-gas dual-purpose evaporative cooling and waste heat recovery system for an air compressor station according to claim 2, characterized in that, The diameter of the vertical heat exchange tube (4) gradually decreases from top to bottom, and it has a frustum cylindrical structure.

6. The water-gas dual-purpose evaporative cooling and waste heat recovery system for an air compressor station according to claim 2, characterized in that, The primary air inlet (5) is connected to the outer side wall of the housing via a primary air inlet pipe (25).

7. The water-gas dual-purpose evaporative cooling and waste heat recovery system for an air compressor station according to claim 6, characterized in that, The compressed air outlet of the air compressor (22) is connected to a compressed air supply pipe (12). One end of the compressed air supply pipe (12) near the compressed air outlet is also connected to a compressed air return pipe (7). The other end of the compressed air return pipe (7) is connected to the primary air inlet pipe (25).

8. The water-gas dual-purpose evaporative cooling and waste heat recovery system for an air compressor station according to claim 2, characterized in that, A circulating water pump (9) is also installed on the pipe between the circulating water tank (8) and the intermediate cooling pipe (11).

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