Wastewater atomization evaporation treatment system and treatment method

Abstract

The invention relates to a wastewater atomization and evaporation treatment system and method. The system comprises an indirect air cooling tower, a wastewater atomization device, a compressed gas conveying device, a wastewater conveying device and a heat exchange part, the wastewater atomization device is mounted in the indirect air cooling tower; the waste water atomization device is connected with the compressed gas conveying device and the waste water conveying device and is used for atomizing waste water conveyed by the waste water conveying device into fog drops with a preset size by utilizing compressed gas conveyed by the waste water atomization device and the compressed gas conveying device and spraying the fog drops into the indirect air cooling tower; the heat exchange part is arranged at the tower bottom of the indirect air cooling tower and used for heating air so as to convey hot air with the preset temperature and the preset flow speed into the indirect air cooling tower, and the waste water treatment device has the advantages that complete treatment of waste water is facilitated, and the waste water treatment cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to a wastewater atomization evaporation treatment system and a treatment method. Background Art

[0002] In existing thermal power plants, the boiler feed water treatment system, condensate treatment system, circulating water treatment system, etc. of thermal power plants will produce acid and alkaline wastewater. Acid and alkaline wastewater is low-turbidity wastewater, and the amount of wastewater generated is small. Taking two million pure condensing units as an example, the acid and alkaline wastewater output of the whole plant is generally less than 2m 3 / h.

[0003] At present, the mainstream treatment method for acid-base wastewater is to neutralize the acid and alkali before discharging it in compliance with the standards. However, discharging it after neutralization will pollute the external environment and increase the treatment costs of enterprises. In recent years, due to the increasingly stringent requirements for wastewater discharge from thermal power plants, some thermal power plants have also set up zero-discharge systems for wastewater, mixing acid-base wastewater with desulfurization wastewater and then treating it in the terminal wastewater treatment system. However, such systems are usually expensive and have high operating costs.

[0004] Therefore, it is urgent for those skilled in the art to provide a wastewater atomization evaporation treatment system and a treatment method to facilitate wastewater treatment and reduce wastewater treatment costs. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defects in the prior art, thereby providing a wastewater atomization evaporation treatment system and a treatment method.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A wastewater atomization and evaporation treatment system comprises an indirect air-cooling tower, a wastewater atomization device, a compressed gas conveying device, a wastewater conveying device and a heat exchanger; the wastewater atomization device is installed in the indirect air-cooling tower; the wastewater atomization device is connected to the compressed gas conveying device and the wastewater conveying device, and is used to use the compressed gas conveyed by the wastewater atomization device and the compressed gas conveying device to atomize the wastewater conveyed by the wastewater conveying device into droplets of a preset size, and spray them into the indirect air-cooling tower; the heat exchanger is arranged at the bottom of the indirect air-cooling tower, and is used to heat air to convey hot air with a preset temperature and a preset flow rate into the indirect air-cooling tower.

[0008] Preferably, the preset size is less than 10 μm.

[0009] Preferably, the wastewater atomization device is configured as a dual-fluid atomization injection device, which includes a compressed gas input end, a wastewater input end and a spray end; the compressed gas input end is connected to the compressed gas delivery device; the wastewater input end is connected to the wastewater delivery device; the spray end includes a nozzle and a first pressure detector, and the first pressure detector is arranged upstream of the nozzle.

[0010] Preferably, the compressed gas delivery device includes a compressed gas storage tank and an exhaust valve group, the exhaust end of the compressed gas storage tank, the exhaust valve group and the wastewater atomization device are connected to form a compressed gas delivery path; the wastewater delivery device includes a wastewater storage tank, a liquid level gauge, a drain valve group and a wastewater delivery pump, the drain end of the wastewater storage tank, the drain valve group, the wastewater delivery pump are connected to the wastewater atomization device to form a wastewater delivery path; the system also includes a controller, which is electrically connected to the exhaust valve group, the liquid level gauge, the drain valve group and the wastewater delivery pump.

[0011] Preferably, the exhaust valve group includes a first stop valve, a first check valve, a pressure reducing valve and a second stop valve; in the direction of flow from the compressed gas storage tank to the wastewater atomization device, the first stop valve, the first check valve, the pressure reducing valve and the second stop valve are connected in sequence through pipes; a second pressure detector is also arranged between the pressure reducing valve and the second stop valve.

[0012] Preferably, the compressed gas delivery device also includes a third pressure detector and an intake valve group; the third pressure detector is used to detect the real-time pressure in the compressed gas storage tank; the intake valve group is connected to the intake end of the compressed gas storage tank, and controls whether to inflate the compressed gas storage tank by turning it on or off, so that the pressure in the compressed gas storage tank maintains a preset standard pressure value.

[0013] Preferably, the intake valve group comprises a second check valve and a third stop valve; along the gas flow direction, the second check valve and the third stop valve are connected in sequence by pipe fittings.

[0014] A treatment method based on the above-mentioned wastewater atomization evaporation treatment system includes the following steps: atomizing the wastewater into droplets of a preset size and spraying them into the indirect air cooling tower; heating the air through a heat exchange element arranged at the bottom of the indirect air cooling tower to form hot air with a preset temperature and a preset flow rate; and using the hot air to evaporate the droplets.

[0015] Preferably, the atomizing the wastewater into droplets of a preset size and spraying them into the indirect air-cooling tower specifically includes the following steps: presetting a high water level threshold of the wastewater storage tank; when the real-time liquid level of the wastewater storage tank reaches the high water level threshold, delivering compressed gas of a preset pressure to the wastewater atomizing device; when the real-time liquid level of the wastewater storage tank reaches the high water level threshold, delivering a preset amount of wastewater to the wastewater atomizing device; and simultaneously opening the compressed gas input end and the wastewater input end of the wastewater atomizing device to utilize the wastewater atomizing device and the compressed gas delivered to the wastewater atomizing device to atomize the wastewater delivered to the wastewater atomizing device into droplets of a preset size.

[0016] Preferably, the method further includes the following steps: presetting a safety threshold of the pressure value at the spray end of the wastewater atomization device; and shutting down the system for maintenance when the detected real-time pressure value at the spray end exceeds the safety threshold.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention provides a wastewater atomization evaporation treatment system. Through the arrangement of a wastewater atomization device, the compressed gas transported by the compressed gas transport device can be used to atomize the wastewater transported by the wastewater transport device into droplets of a preset size, and sprayed into the indirect air cooling tower. The heating element arranged at the bottom of the indirect air cooling tower can transport hot air into the air cooling tower, and then the temperature and flow rate of the hot air can be used to evaporate the droplets, and the droplets formed by the wastewater are evaporated and discharged with the hot air in the tower, so that the complete treatment of the wastewater can be achieved at a lower cost. In addition, after the wastewater is formed into droplets of a preset size, on the one hand, it can be facilitated to evaporate and be discharged together with the hot air in the tower, avoiding wastewater from remaining in the indirect air cooling tower, and thus avoiding wastewater from affecting the heat exchanger after dripping (such as foreign matter remaining on the heat exchanger, affecting the heat exchange effect of the heat exchanger). On the other hand, after the droplets are formed, they can be increased to float in the indirect air cooling tower, which is conducive to their contact with the hot air, and further conducive to the complete evaporation of the wastewater. Correspondingly, the treatment method provided by the present invention based on the above-mentioned wastewater atomization evaporation treatment system has the advantages of being convenient for complete treatment of wastewater and having low wastewater treatment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is the connection diagram of this system.

[0021] Description of reference numerals:

[0022] 1. Indirect air cooling tower; 2. Wastewater atomization device; 21. Compressed gas input end; 22. Wastewater input end; 23. Spray end; 231. Nozzle; 232. First pressure detector; 3. Compressed gas delivery device; 31. Compressed gas storage tank; 32. Exhaust valve group; 321. First stop valve; 322. First check valve; 323. Pressure reducing valve; 324. Second stop valve; 33. Second pressure detector; 34. Third pressure detector; 35. Inlet valve group; 351. Second check valve; 352. Third stop valve; 4. Wastewater delivery device; 41. Wastewater storage tank; 42. Liquid level meter; 43. Drain valve group; 44. Wastewater delivery pump; 5. Heat exchanger. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] See also Figure 1 An embodiment of the present invention provides a wastewater atomization evaporation treatment system, including an indirect air cooling tower 1, a wastewater atomization device 2, a compressed gas conveying device 3, a wastewater conveying device 4 and a heat exchanger 5.

[0027] Specifically, the wastewater atomization device 2 is installed in the indirect air-cooling tower 1; the wastewater atomization device 2 is connected to the compressed gas conveying device 3 and the wastewater conveying device 4, and is used to use the compressed gas conveyed by the wastewater atomization device 2 and the compressed gas conveying device 3 to atomize the wastewater conveyed by the wastewater conveying device 4 into droplets of a preset size, and spray them into the indirect air-cooling tower 1; the heat exchanger 5 is arranged at the bottom of the indirect air-cooling tower 1, and is used to heat the air to convey hot air with a preset temperature and a preset flow rate into the indirect air-cooling tower 1.

[0028] In the above scheme, by setting the wastewater atomizing device 2, the compressed gas delivered by the compressed gas delivery device 3 can be used to atomize the wastewater delivered by the wastewater delivery device 4 into droplets of a preset size, and spray them into the indirect air cooling tower 1, and the heating element arranged at the bottom of the indirect air cooling tower 1 can deliver hot air into the air cooling tower, and then the temperature and flow rate of the hot air can be used to evaporate the droplets, and the droplets formed by the wastewater are evaporated and discharged with the hot air in the tower, so that the complete treatment of the wastewater can be achieved at a lower cost. In addition, after the wastewater is formed into droplets of a preset size, on the one hand, it can be facilitated to evaporate and be discharged with the hot air in the tower, avoiding wastewater from remaining in the indirect air cooling tower 1, and thus avoiding wastewater from affecting the heat exchanger 5 after dripping (such as foreign matter remaining on the heat exchanger 5 affecting the heat exchange effect of the heat exchanger 5), and on the other hand, after the droplets are formed, they can be increased to float in the indirect air cooling tower 1, which is conducive to their contact with hot air, and further conducive to the complete evaporation of the wastewater.

[0029] It can be known that the internal area of ​​the indirect air-cooling tower 1 is large and spacious. The process characteristics of the indirect air-cooling tower 1 itself lead to a high temperature inside the tower and good air fluidity, which can usually exceed 60°C in summer. The indirect air-cooling tower 1 cooperates with the wastewater atomization device 2 to achieve a good wastewater treatment effect. At the same time, the system of the present invention only needs to set up compressed gas storage tanks and wastewater storage tanks, which occupies a small area and effectively utilizes the waste heat of the indirect air-cooling tower, which can greatly reduce the system investment and ton water treatment cost of acid and alkali wastewater treatment, simplify the operation process, and the investment in ton water treatment is less than 250,000 yuan, and the operation and treatment cost is only the factory electricity cost (negligible).

[0030] In order to further improve the wastewater treatment effect, the preset size of the droplets is less than 10 μm, so that the droplets can float better in the indirect air cooling tower 1, thereby facilitating the droplets to be completely evaporated under the action of hot air.

[0031] See also Figure 1The heat exchange element 5 can be set as an aluminum circulating water heat exchange pipe, and the suction effect of the indirect air cooling tower 1 is used to make the cold air exchange heat with the aluminum heat exchanger to achieve the purpose of cooling the circulating water. At the same time, the air heated by the aluminum circulating water heat exchange pipe forms hot air with a preset temperature and a preset flow rate, and is transported to the indirect air cooling tower 1. It can be known that the hot air is discharged from the upper end of the indirect air cooling tower 1 after contacting the droplets.

[0032] See also Figure 1 The wastewater atomization device 2 is configured as a dual-fluid atomization injection device, which includes a compressed gas input end 21, a wastewater input end 22 and a spray end 23; the compressed gas input end 21 is connected to the compressed gas conveying device 3; the wastewater input end 22 is connected to the wastewater conveying device 4.

[0033] It can be known that the compressed gas is transported from the compressed gas input end 21 to the spray end 23, and the wastewater is transported to the spray end 23 through the wastewater input end 22, and finally the wastewater in the form of droplets is sprayed out from the output end of the spray end 23. It can be understood that in order to meet actual needs, the compressed gas input end 21 and the wastewater input end 22 can be provided with corresponding control valves to control the on and off of the compressed gas input end 21 and the wastewater input end 22; the control valve can be set to be electrically controlled or manually controlled.

[0034] Furthermore, several wastewater atomizing devices 2 can be provided to evenly distribute the mist droplets in the indirect air cooling tower 1. For example, eight sets of 300L / h dual-fluid atomizing spray devices can be provided, and the eight sets of dual-fluid atomizing spray devices can be evenly distributed in the indirect air cooling tower 1.

[0035] See also Figure 1 In order to timely repair the nozzle 231 when it is clogged, in the present embodiment, the spray end 23 includes the nozzle 231 and a first pressure detector 232 , and the first pressure detector 232 is arranged upstream of the nozzle 231 .

[0036] It can be understood that by setting up the first pressure detector 232, the pressure of the fluid at the front end of the nozzle 231 can be detected in real time. The pressure value detected in real time can be compared with the preset safety threshold, so as to determine whether the nozzle 231 is blocked. If blocked, the whole system can be shut down immediately for maintenance, thereby eliminating safety hazards.

[0037] See also Figure 1The compressed gas delivery device 3 includes a compressed gas storage tank 31 and an exhaust valve group 32. The exhaust end of the compressed gas storage tank 31, the exhaust valve group 32 and the wastewater atomization device 2 are connected to form a compressed gas delivery path. The wastewater delivery device 4 includes a wastewater storage tank 41, a liquid level meter 42, a drain valve group 43 and a wastewater delivery pump 44. The drain end of the wastewater storage tank 41, the drain valve group 43 and the wastewater delivery pump 44 are connected to the wastewater atomization device 2 to form a wastewater delivery path. The system also includes a controller, which is electrically connected to the exhaust valve group 32, the liquid level meter 42, the drain valve group 43 and the wastewater delivery pump 44.

[0038] When in actual use, the high water level threshold of the wastewater storage tank 41 can be preset in the controller, and the liquid level meter 42 can detect the real-time liquid level value of the wastewater storage tank 41 and transmit it to the controller (wireless transmission or wired transmission in the prior art can be adopted, which is not the focus of this application and will not be described in detail). The controller can compare the real-time liquid level value and the high water level threshold in real time. When the real-time liquid level of the wastewater storage tank 41 reaches the high water level threshold, the compressed gas of the preset pressure is transmitted to the wastewater atomization device 2, and the preset amount of wastewater is simultaneously transmitted to the wastewater atomization device 2, so as to realize the conversion of the preset amount of wastewater into droplets and realize the complete treatment of the wastewater.

[0039] Specifically, the compressed gas storage tank 31 can be set to 6m 3 , wastewater storage tank 41 can be set to 50m 3 .

[0040] Specifically, the exhaust valve group 32 includes a first stop valve 321, a first check valve 322, a pressure reducing valve 323 and a second stop valve 324; in the direction of flow from the compressed gas storage tank 31 to the wastewater atomization device 2, the first stop valve 321, the first check valve 322, the pressure reducing valve 323 and the second stop valve 324 are connected in sequence through pipe fittings; a second pressure detector 33 is also arranged between the pressure reducing valve 323 and the second stop valve 324, and the pressure value delivered to the wastewater atomization device 2 can be controlled by the cooperation of the first stop valve 321, the first check valve 322, the pressure reducing valve 323, the second stop valve 324 and the second pressure detector 33.

[0041] Furthermore, the compressed gas delivery device 3 further includes a third pressure detector 34 and an intake valve group 35; the third pressure detector 34 is used to detect the real-time pressure in the compressed gas storage tank 31; the intake valve group 35 is connected to the intake end of the compressed gas storage tank 31, and controls whether to charge the compressed gas storage tank 31 by conducting or cutting off, so that the pressure in the compressed gas storage tank 31 maintains a preset standard pressure value. Among them, the intake valve group 35 includes a second check valve 351 and a third stop valve 352; along the gas flow direction, the second check valve 351 and the third stop valve 352 are sequentially connected by pipe fittings.

[0042] Furthermore, the second pressure detector 33 is connected to the controller in communication to achieve data transmission. At the same time, the second stop valve 324 is set as an electric control valve. At this time, the pressure of the second pressure detector 33 can be detected. When the detected pressure value of the second pressure detector 33 is greater than a certain value (for example, 0.6MPa), the second stop valve 324 can be opened by the controller. When the detected pressure value of the second pressure detector 33 is less than a certain value (for example, 0.6MPa), the second stop valve 324 can be closed by the controller, and the drainage valve group 43 and the wastewater delivery pump 44 are closed at the same time to stop delivering wastewater to the wastewater atomization device 2. After that, the third stop valve 352 is controlled to open and deliver gas to the compressed gas storage tank 31 until the pressure of the compressed gas storage tank 31 detected by the third pressure detector 34 maintains the preset standard pressure value, and then the intake valve group 35 is closed.

[0043] It is understandable that, in order to facilitate automatic control of the entire system, the controller and related valves, instruments, etc. in the system can be electrically connected.

[0044] join Figure 1 In order to serve as backup for each other and prevent system failure, two or more compressed gas storage tanks 31 can be provided, and correspondingly, two or more compressed gas delivery paths and compressed air input paths (input compressed gas storage tanks 31) can also be provided. Similarly, two or more wastewater delivery paths can be provided.

[0045] The embodiment of the present invention further provides a treatment method based on the above wastewater atomization evaporation treatment system, which specifically includes the following steps:

[0046] Atomizing the wastewater into droplets of a preset size and spraying them into the indirect air cooling tower 1;

[0047] The air is heated by a heat exchanger 5 arranged at the bottom of the indirect air cooling tower 1 to form hot air with a preset temperature and a preset flow rate;

[0048] Use hot air to evaporate the mist droplets.

[0049] Specifically, in this embodiment, the wastewater is atomized into droplets of a preset size and sprayed into the indirect air cooling tower 1, which specifically includes the following steps:

[0050] Preset a high water level threshold of the wastewater storage tank 41;

[0051] When the real-time liquid level of the wastewater storage tank 41 reaches the high water level threshold, the compressed gas of the preset pressure is delivered to the wastewater atomization device 2;

[0052] When the real-time liquid level of the wastewater storage tank 41 reaches the high water level threshold, a preset amount of wastewater is delivered to the wastewater atomization device 2;

[0053] The compressed gas input end 21 and the wastewater input end 22 of the wastewater atomization device 2 are opened at the same time, so as to utilize the wastewater atomization device 2 and the compressed gas delivered to the wastewater atomization device 2 to atomize the wastewater delivered to the wastewater atomization device 2 into droplets of a preset size.

[0054] The method comprises the following steps:

[0055] Preset a safety threshold of the pressure value at the spray end 23 of the wastewater atomization device 2;

[0056] When the detected real-time pressure value at the spray end 23 exceeds the safety threshold, the system is shut down for maintenance.

[0057] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A wastewater atomization evaporation treatment system, characterized in that: It comprises an indirect air cooling tower (1), a wastewater atomizing device (2), a compressed gas conveying device (3), a wastewater conveying device (4) and a heat exchange element (5); The wastewater atomization device (2) is installed in the indirect air cooling tower (1); The wastewater atomizing device (2) is connected to the compressed gas conveying device (3) and the wastewater conveying device (4), and is used to utilize the compressed gas conveyed by the wastewater atomizing device (2) and the compressed gas conveying device (3) to atomize the wastewater conveyed by the wastewater conveying device (4) into droplets of a preset size, and spray the droplets into the indirect air cooling tower (1); The heat exchange element (5) is arranged at the bottom of the indirect air cooling tower (1) and is used to heat air so as to transport hot air with a preset temperature and a preset flow rate into the indirect air cooling tower (1).

2. A wastewater atomization evaporation treatment system according to claim 1, characterized in that: The value of the preset size is less than 10 μm.

3. A wastewater atomization evaporation treatment system according to claim 2, characterized in that: The wastewater atomization device (2) is configured as a dual-fluid atomization injection device, and the dual-fluid atomization injection device comprises a compressed gas input end (21), a wastewater input end (22) and a spray end (23); The compressed gas input end (21) is connected to the compressed gas delivery device (3); The wastewater input end (22) is connected to the wastewater conveying device (4); The spray end (23) comprises a spray head (231) and a first pressure detector (232), wherein the first pressure detector (232) is arranged upstream of the spray head (231).

4. A wastewater atomization evaporation treatment system according to claim 1, characterized in that: The compressed gas delivery device (3) comprises a compressed gas storage tank (31) and an exhaust valve group (32), and the exhaust end of the compressed gas storage tank (31), the exhaust valve group (32) and the wastewater atomization device (2) are connected to form a compressed gas delivery path; The wastewater conveying device (4) comprises a wastewater storage tank (41), a liquid level meter (42), a drainage valve group (43) and a wastewater conveying pump (44); the drainage end of the wastewater storage tank (41), the drainage valve group (43) and the wastewater conveying pump (44) are connected to the wastewater atomizing device (2) to form a wastewater conveying path; The system further comprises a controller, wherein the controller is electrically connected to the exhaust valve group (32), the liquid level meter (42), the drain valve group (43) and the wastewater delivery pump (44).

5. A wastewater atomization evaporation treatment system according to claim 4, characterized in that: The exhaust valve group (32) comprises a first stop valve (321), a first check valve (322), a pressure reducing valve (323) and a second stop valve (324); In the direction of flow from the compressed gas storage tank (31) to the wastewater atomization device (2), the first stop valve (321), the first check valve (322), the pressure reducing valve (323) and the second stop valve (324) are connected in sequence through pipe fittings; A second pressure detector (33) is also provided between the pressure reducing valve (323) and the second stop valve (324).

6. A wastewater atomization evaporation treatment system according to claim 4 or 5, characterized in that: The compressed gas delivery device (3) further comprises a third pressure detector (34) and an intake valve group (35); The third pressure detector (34) is used to detect the real-time pressure in the compressed gas storage tank (31); The air inlet valve group (35) is connected to the air inlet end of the compressed gas storage tank (31), and controls whether to inflate the compressed gas storage tank (31) by switching on or off, so that the pressure in the compressed gas storage tank (31) is maintained at a preset standard pressure value.

7. A wastewater atomization evaporation treatment system according to claim 6, characterized in that: The air intake valve group (35) comprises a second check valve (351) and a third stop valve (352); Along the gas flow direction, the second check valve (351) and the third stop valve (352) are connected in sequence by pipe fittings.

8. A treatment method based on the wastewater atomization evaporation treatment system according to any one of claims 1 to 7, characterized in that: The following steps are involved: Atomizing the wastewater into droplets of a preset size and spraying the droplets into the indirect air cooling tower (1); Heating the air through a heat exchange element (5) disposed at the bottom of the indirect air cooling tower (1) to form hot air with a preset temperature and a preset flow rate; The hot air is used to evaporate the mist droplets.

9. The processing method according to claim 8, characterized in that: The step of atomizing the wastewater into droplets of a preset size and spraying the droplets into the indirect air cooling tower (1) specifically comprises the following steps: Presetting a high water level threshold of the wastewater storage tank (41); When the real-time liquid level of the wastewater storage tank (41) reaches the high water level threshold, compressed gas at a preset pressure is delivered to the wastewater atomization device (2); When the real-time liquid level of the wastewater storage tank (41) reaches the high water level threshold, a preset amount of wastewater is transported to the wastewater atomization device (2); The compressed gas input end (21) and the wastewater input end (22) of the wastewater atomization device (2) are opened simultaneously, so as to utilize the wastewater atomization device (2) and the compressed gas delivered to the wastewater atomization device (2) to atomize the wastewater delivered to the wastewater atomization device (2) into droplets of a preset size.

10. The processing method according to claim 8, characterized in that: The following steps are also included: Presetting a safety threshold value of the pressure value at the spray end (23) of the wastewater atomization device (2); When the detected real-time pressure value at the spray end (23) exceeds the safety threshold, the system is shut down for maintenance.

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