Acid and alkali removal device for mixed gas

Abstract

The utility model relates to a deacidification and dealkalization device for mixed gas, which is characterized by comprising a gas cooling assembly, a washing assembly and a spraying circulation assembly, the gas cooling assembly comprises a cooling cabin, a spraying system, a gas blocking cap and a first temperature sensor, a gas inlet pipe is arranged in the cooling cabin, and a gas outlet pipe is arranged in the spraying system. The gas blocking cap is arranged at the end of the gas inlet pipe, a spraying system is arranged in the cooling bin and located above the gas inlet pipe, a first temperature sensor used for detecting the temperature in the cooling bin is further arranged on the cooling bin, the top of the cooling bin is provided with a gas outlet, the side of the cooling bin is provided with a liquid overflowing opening, and the gas outlet is communicated with a gas inlet of the washing assembly. Liquid inlets of the spraying system and the washing assembly are respectively connected with a liquid outlet pipeline of the spraying circulation assembly through corresponding connecting pipes; and a liquid overflow port of the cooling cabin is connected with a liquid return port pipeline of the spraying circulation assembly. The gas chilling device is compact in structure and small in occupied volume, and gas can be quickly chilled and then cleaned.

Description

Technical Field

[0001] The utility model relates to an acid and alkali removal device, in particular to an acid and alkali removal device for mixed gas. Background Art

[0002] The harmful gases causing environmental pollution in the coating industry mainly come from the processes of cleaning, spin coating, stripping, etching, and developing in chip or circuit board production. The waste gases in the semiconductor industry are mainly divided into two categories: organic waste gases and acid-base waste gases. Organic ones include: total non-methane hydrocarbons, NOx, SO2, etc.; acid-base ones include: NH3, Cl2, sulfuric acid mist, fluorides, chlorides, etc.

[0003] The waste gases generated by the coating process cause serious pollution and great harm, specifically manifested in: ① Acid-base gases form corrosive liquids when encountering water, damaging water sources, land, and corroding equipment. ② The gases have peculiar smells, easily pollute the working environment, and reduce production efficiency. ③ It is prone to explosion and combustion, causing potential safety hazards.

[0004] To solve the impact caused by the waste gases generated by the coating process, the prior art treatment devices for such gases include a tank body and a cyclone structure and a liquid adding structure provided on the tank body. When in use, the gas enters the tank body and presents a cyclone state inside the tank body, that is, the waste gas is guided to form a cyclone through the cyclone structure, and under the action of the liquid adding structure, the waste gas is mixed with the mixed liquid to achieve acid-base neutralization. The defects of this structure are as follows: First, it not only occupies a large volume and has a high construction cost, but also the temperature of the waste gas is relatively high before washing, which will cause a certain degree of damage to the tank body and requires irregular maintenance, resulting in a relatively high subsequent use cost; Second, in the prior art gas treatment device, the waste gas presents a cyclone state inside the tank body, and the pressure loss required for cyclone formation is relatively large, so more energy is needed, which further increases the construction cost of the device; Third, the NaCl in the waste liquid after traditional acid-base neutralization will always deposit at the bottom of the water tank, and when it reaches a certain amount, it will seriously affect the effect of the neutralization reaction, and finally needs to be treated together with the waste liquid in the water tank. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an acid and alkali removal device for mixed gas that is not only structurally compact and occupies a small volume, but also can quickly cool the gas and then wash it, realizing a combination of the cooling method and the water-soluble method, and the waste water can be reused to improve the utilization rate.

[0006] To achieve the above purpose, the technical solution of the utility model is: an acid and alkali removal device for mixed gas, the innovation of which lies in: including a gas cooling assembly for cooling the mixed gas, a washing assembly for washing the cooled mixed gas, and a spray circulation assembly for providing a mixed liquid circulation loop for the gas cooling assembly and the washing assembly.

[0007] The gas cooling assembly includes a cooling chamber, a spraying system, a gas blocking cap, and a first temperature sensor. A gas inlet pipe is provided inside the cooling chamber, and the gas blocking cap is provided at the end of the gas inlet pipe. The spraying system is provided above the gas inlet pipe inside the cooling chamber, and the cooling chamber is also provided with a first temperature sensor for detecting the temperature inside the chamber.

[0008] The top of the cooling chamber has an air outlet, and the side has an overflow port. The air outlet is connected to the air inlet of the washing assembly. The spraying system and the liquid inlet of the washing assembly are respectively connected to the liquid outlet of the spraying circulation assembly through corresponding connecting pipes, and the overflow port of the cooling chamber is connected to the liquid return port of the spraying circulation assembly through a pipeline.

[0009] The mixed gas enters the cooling chamber through the gas inlet pipe and sinks under the action of the gas blocking cap. After the spraying system cools down the gas, it enters the washing assembly for cleaning to remove acid or alkali, and then the clean gas is discharged.

[0010] In the above technical solution, the washing assembly includes a washing chamber, a cleaning spray pipe, a demister, Pall rings, and a second temperature sensor. The washing chamber is provided above the cooling chamber and is detachably connected to it, and the inner cavities of the washing chamber and the cooling chamber are connected.

[0011] A demister is provided in the upper part of the washing chamber, a cleaning spray pipe is provided in the middle part, and Pall rings for increasing the gas movement path and residence time to improve the cleaning effect are provided in the lower part near the air inlet. Second temperature sensors are respectively provided on the washing chamber near the air inlet and near the air outlet. The cleaning spray pipe is connected to the liquid outlet of the spraying circulation assembly through a corresponding connecting pipe.

[0012] In the above technical solution, a third temperature sensor is provided on the pipeline connecting the spraying system and the liquid outlet of the spraying circulation assembly, and a fourth temperature sensor is provided on the pipeline connecting the cleaning spray pipe and the liquid outlet of the spraying circulation assembly.

[0013] In the above technical solution, the spraying circulation assembly includes a box body, a heat exchanger, a circulation pump, a liquid discharge unit, and a solution pumping unit.

[0014] The inside of the box body has a separated cooling water chamber and a solution chamber. The cooling water chamber is also connected to the liquid discharge unit, and the solution pumping unit is connected to the solution chamber.

[0015] The liquid inlet of the heat exchanger is connected to the liquid outlet of the cooling water chamber through a circulation pump, and the liquid outlet of the heat exchanger is connected to the spraying system and the washing assembly through corresponding connecting pipes. The heat exchange inlet and heat exchange outlet of the heat exchanger are respectively connected to the outlet and inlet pipelines of an external constant temperature cooling water tank body to realize the heat exchange of the coolant, and a first pneumatic valve is provided on the pipeline connected to the heat exchange inlet.

[0016] In the above technical solution, the overflow port of the cooling chamber is sequentially connected to the liquid return port of the cooling water chamber of the box body through a communicating balance pipe and a liquid return pipe. A first pH sensor is provided on the liquid return pipe, and the height of the mixed liquid in the cooling chamber is the same as that of the mixed liquid in the communicating balance pipe.

[0017] In the above technical solution, the liquid discharging unit includes a liquid discharging pump and a conductivity sensor. The liquid inlet of the liquid discharging pump is connected to the liquid discharging port of the cooling water chamber through a pipeline, and the conductivity sensor is arranged at the top of the box body, and its probe extends into the interior of the cooling water chamber.

[0018] In the above technical solution, the solution pumping unit includes a variable diaphragm pump and a second pH sensor. The inlet of the variable diaphragm pump is connected to the solution chamber, and the outlet is connected to the cooling water chamber. The second pH sensor is arranged at the top of the box body, and its probe extends into the interior of the cooling water chamber.

[0019] In the above technical solution, the spray circulation assembly further includes a water replenishing unit. The water replenishing unit includes a water replenishing pipe, a liquid level sensor, and a second pneumatic valve. The water replenishing pipe is connected to the cooling water chamber, and a second pneumatic valve is provided on the pipeline of the water replenishing pipe. The cooling water chamber is provided with a liquid level sensor for detecting the high liquid level and a liquid level sensor for detecting the low liquid level in the chamber.

[0020] In the above technical solution, a third temperature sensor is provided on the pipeline connecting the spray system and the heat exchanger, and a fourth temperature sensor is provided on the pipeline connecting the cleaning spray pipe of the washing assembly and the heat exchanger.

[0021] In the above technical solution, a manual valve is provided on the pipeline connecting the liquid discharging pump and the cooling water chamber.

[0022] The positive effects of the present utility model are as follows: After adopting the acid and alkali removal device for mixed gas of the present utility model, since the present utility model includes a gas cooling assembly for cooling the mixed gas, a washing assembly for cleaning the cooled mixed gas, and a spray circulation assembly for providing a mixed liquid circulation loop for the gas cooling assembly and the washing assembly,

[0023] The gas cooling assembly includes a cooling chamber, a spray system, a gas blocking cap, and a first temperature sensor. A gas inlet pipe is provided inside the cooling chamber, and the gas blocking cap is arranged at the end of the gas inlet pipe. The spray system is provided above the gas inlet pipe in the cooling chamber, and the cooling chamber is further provided with a first temperature sensor for detecting the temperature inside the chamber.

[0024] The top of the cooling chamber has an air outlet, and the side has an overflow port. The air outlet is connected to the air inlet of the washing assembly. The liquid inlets of the spraying system and the washing assembly are respectively connected to the liquid outlet of the spraying circulation assembly through corresponding connecting pipes, and the overflow port of the cooling chamber is connected to the liquid return port of the spraying circulation assembly.

[0025] The mixed gas enters the cooling chamber through the gas inlet pipe and sinks under the action of the gas blocking cap. After the spraying system cools down the gas, it enters the washing assembly for acid or alkali removal by cleaning, and then the clean gas is discharged.

[0026] The utility model combines the cooling method and the water-soluble method. First, the mixed gas is cooled, and then it is cleaned. At the same time, according to the characteristics of the mixed gas, the spraying liquid amounts of gas cooling and water solubility can be adjusted, so that the temperature of the gas entering the washing area can be reduced to the designed range, accelerating the efficiency of gas water-soluble treatment. The treated gas achieves ultra-clean emission, and the HCL emission concentration ≤ 5mg / m 3 , and at the same time, pollutants can be recovered through the spraying circulation assembly, and the waste water can be reused. At the same time, the utility model also has the advantages of small occupied volume and low maintenance cost. Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of a specific embodiment of the utility model;

[0028] Figure 2 is a three-dimensional structural diagram of the utility model;

[0029] Figure 3 is Figure 2 another direction schematic diagram of Detailed Embodiment

[0030] The following further describes the present utility model in conjunction with the accompanying drawings and the given embodiments, but is not limited thereto.

[0031] As Figure 1 , 2 , shown in 3, an acid and alkali removal device for mixed gas includes a gas cooling assembly 1 for cooling the mixed gas, a washing assembly 2 for cleaning the cooled mixed gas, and a spraying circulation assembly 3 for providing a mixed liquid circulation loop for the gas cooling assembly 1 and the washing assembly 2.

[0032] The gas cooling assembly 1 includes a cooling chamber 11, a spraying system 12, a gas blocking cap 13 and a first temperature sensor 14. A gas inlet pipe 15 is provided inside the cooling chamber 11, and the gas blocking cap 13 is provided at the end of the gas inlet pipe 15. The spraying system 12 is provided above the gas inlet pipe 15 inside the cooling chamber 11. The cooling chamber 11 is also provided with a first temperature sensor 14 for detecting the temperature inside the chamber.

[0033] The top of the cooling chamber 11 has an air outlet, and the side has an overflow port. The air outlet is communicated with the air inlet of the washing assembly 2. The liquid inlets of the spraying system 12 and the washing assembly 2 are respectively connected to the liquid outlet of the spraying circulation assembly 3 through corresponding connecting pipes. The overflow port of the cooling chamber 11 is connected to the liquid return port of the spraying circulation assembly 3 through a pipeline.

[0034] The mixed gas enters the cooling chamber 11 through the gas inlet pipe 15 and sinks under the action of the gas blocking cap 13. The spraying system 12 cools the gas and then enters the washing assembly 2 for cleaning to remove acid or alkali, and then the clean gas is discharged.

[0035] As Figure 1 shown, in order to implement the water-soluble process for the gas, further to achieve the acid-base neutralization reaction for the gas and remove the water-soluble gas in the VOC gas, the washing assembly 2 includes a washing chamber 21, a cleaning spray pipe 22, a demister 23, a Pall ring 24 and a second temperature sensor 25. The washing chamber 21 is provided above the cooling chamber 11 and is detachably connected thereto, and the inner cavity of the washing chamber 21 is communicated with that of the cooling chamber 11.

[0036] A demister 23 is provided in the upper part of the washing chamber 21, a cleaning spray pipe 22 is provided in the middle part, and a Pall ring 24 for increasing the gas movement path and residence time to improve the cleaning effect is provided in the lower part near the air inlet. Second temperature sensors 25 are respectively provided at the washing chamber 21 near the air inlet and near the air outlet. The cleaning spray pipe 22 is connected to the liquid outlet of the spraying circulation assembly 3 through a corresponding connecting pipe.

[0037] Among them, the provided demister can demist the washed gas again to reduce secondary pollution. In order to ensure the cleaning effect and efficiency of the gas, the Pall ring 24 is provided in the washing chamber. In order to be able to monitor the gas temperature in sections, one second temperature sensor can detect the temperature of the gas when it enters the washing chamber 21, and the other second temperature sensor can detect the temperature of the washed gas, so as to timely obtain the temperature difference of the gas before and after cleaning and ensure the stability and safety of the discharged gas.

[0038] The spray system 12 and the cleaning spray pipe 22 of the present utility model are both designed with double-layer spray pipes, aiming to adjust the spray volume during gas cooling and the cleaning volume during cleaning according to the characteristics of the gas itself, ensure the efficiency of gas quenching treatment and acid-base neutralization treatment, and avoid waste of energy.

[0039] As Figure 1 、 2 、shown in Figure 3, in order to be able to monitor the on-line temperature of the mixed liquid entering the spray system and the cleaning spray pipe in real time, a third temperature sensor 16 is provided on the pipeline connecting the spray system 12 to the liquid outlet of the spray circulation assembly 3, and a fourth temperature sensor 26 is provided on the pipeline connecting the cleaning spray pipe 22 to the liquid outlet of the spray circulation assembly 3.

[0040] As Figure 1 、 2 、shown in Figure 3, in order to be able to provide a constant-temperature mixed liquid for the gas cooling assembly and the washing assembly during gas cooling and cleaning, and be able to return to the box body for repeated use, improve the liquid utilization rate, and avoid waste of energy, the spray circulation assembly 3 includes a box body 31, a heat exchanger 32, a circulation pump 33, a liquid discharge unit 34 and a solution pumping unit 35.

[0041] The interior of the box body 31 has a separated cooling water chamber 311 and a solution chamber 312.

[0042] The liquid inlet of the heat exchanger 32 is connected to the liquid outlet of the cooling water chamber 311 through the circulation pump 33, and the liquid outlet of the heat exchanger 32 is connected to the spray system 12 and the washing assembly 2 through corresponding connecting pipes. The heat exchange inlet and heat exchange outlet of the heat exchanger 32 are respectively connected to the outlet and inlet pipelines of an external constant-temperature cooling water tank body to realize heat exchange of the coolant, and a first pneumatic valve 36 is provided on the pipeline connected to the heat exchange inlet.

[0043] The cooling water chamber 311 is also connected to the liquid discharge unit 34, and the solution pumping unit 35 is connected to the solution chamber 312.

[0044] The mixed liquid in the cooling water chamber 311 is formed by mixing the externally connected cooling water and the solution pumped into the cooling water chamber 312 from the solution chamber 312. The coolant used during gas cooling and the cleaning liquid used during cleaning are both mixed liquids formed by mixing cooling water and the solution. The specific process of the spray circulation assembly is as follows: use the circulation pump 33 to send the mixed liquid in the cooling water chamber 311 into the heat exchanger 32, and the heat exchanger 32 sends the mixed liquid into the spray system 12 to quench and cool the mixed gas entering the cooling chamber 11. Then the gas enters the washing chamber 21, and similarly, the heat exchanger 32 sends the mixed liquid into the cleaning spray pipe 22 to clean the cooled gas and remove water-soluble gases.

[0045] As Figure 3As shown in the figure, in order to realize the recycling of the mixed liquid and ensure that the volume of the mixed liquid remaining in the cooling tank 11 is constant, the overflow port of the cooling tank 11 is successively connected to the return port of the cooling water chamber 311 of the box body 31 through a communication balance pipe 17 and a return pipe 18. A first pH sensor 19 is provided on the return pipe 18. The height of the mixed liquid in the cooling tank 11 is the same as that of the mixed liquid in the communication balance pipe 17. The mixed liquid sprayed by the spray system 12 and the cleaning spray pipe 22 all falls into the cooling tank 11. When the liquid level in the cooling tank 11 is higher than the communication balance pipe 17, it will flow back into the cooling water chamber 311 of the box body 31 through the return pipe 18, realizing the recovery of the mixed liquid. At the same time, the first pH sensor 19 can monitor the pH value of the mixed liquid in the return pipe 18. If the pH value does not meet the requirements, the solution can be supplemented or the alkali liquid can be increased through the solution pumping unit 35 to increase the pH value.

[0046] As Figure 2 , 3 shown, in order to recycle pollutants, replace the mixed liquid, and prevent the conductivity value from being too large and affecting the gas cleaning effect, the drainage unit 34 includes a drainage pump 341 and a conductivity sensor 342. The inlet of the drainage pump 341 is connected to the drainage port of the cooling water chamber 311 through a pipeline. The conductivity sensor 342 is provided on the top of the box body 31, and its probe extends into the interior of the cooling water chamber 311. When the conductivity sensor 342 detects that the conductivity value of the mixed liquid in the cooling water chamber 311 of the box body 31 is greater than the set value, the drainage pump 341 is started to drain the liquid.

[0047] As Figure 2 , 3 shown, in order to prevent the pH value of the mixed liquid from being too large or too small and affecting the water solubility effect of the gas, it is necessary to supplement the solution and adjust the pH value of the mixed liquid. The solution pumping unit 35 includes a variable diaphragm pump 351 and a second pH sensor 352. The inlet of the variable diaphragm pump 351 is connected to the solution chamber 312, and the outlet is connected to the cooling water chamber 311. The second pH sensor 352 is provided on the top of the box body 31, and its probe extends into the interior of the cooling water chamber 311. When the second pH sensor 352 detects that the pH value of the mixed liquid is less than the set value, the variable diaphragm pump 351 is started to add the solution into the cooling water chamber 311 of the box body 31 until the pH value reaches the set value.

[0048] As Figure 2 , 3As shown, in order to replenish water into the cooling water chamber in a timely manner, the spray circulation assembly 3 further includes a water replenishing unit 37. The water replenishing unit 37 includes a water replenishing pipe 371, a liquid level sensor 372, and a second pneumatic valve 373. The water replenishing pipe 371 is communicated with the cooling water chamber 311, and a second pneumatic valve 373 is provided on the pipeline of the water replenishing pipe 371. The cooling water chamber 311 is provided with a liquid level sensor for detecting the high liquid level in the chamber and a liquid level sensor for detecting the low liquid level. Specifically, when the liquid level sensor for detecting the low liquid level detects that the liquid in the cooling water chamber 311 is at a low level, the second pneumatic valve 373 opens to add fresh water into it to replenish the liquid level until it reaches the high liquid level. At the same time, the liquid level sensor for detecting the high liquid level sends a corresponding signal to close the second pneumatic valve 373.

[0049] In order to obtain the height of the solution in the solution chamber 312 of the box body 31 in a timely manner, the box body 31 is further provided with liquid level sensors for detecting the high liquid level and the low liquid level of the solution chamber 312.

[0050] As Figure 1 、 2 As shown in FIGS. 3, in order to be able to monitor the on-line temperature of the mixed liquid entering the spray system and the cleaning spray pipe in real time, a third temperature sensor 16 is provided on the pipeline where the spray system 12 is connected to the heat exchanger 32, and a fourth temperature sensor 26 is provided on the pipeline where the cleaning spray pipe 22 of the washing assembly 2 is connected to the heat exchanger 32.

[0051] As Figure 3 As shown, in order to enable the maintenance of instruments and sensors, a manual valve 343 is provided on the pipeline where the drain pump 341 is connected to the cooling water chamber 311.

[0052] The technological process of the present utility model is as follows: the heat exchange port of the heat exchanger 32 is communicated with an external constant temperature cooling water tank to realize the heat exchange of the coolant. The temperature of the mixed liquid is constant, ensuring the cooling and cleaning effects of the gas.

[0053] Cooling: The gas cooling assembly 1 (cooling zone) uses the quenching-cooling method.

[0054] The mixed gas enters the cooling chamber 11 and sinks under the action of the gas blocking cap 13. At the same time, it avoids the direct impact of the gas on the nozzle and the sensor. The spray system 12 sprays and cools the mixed gas, reducing the temperature to about 25 °C. Specifically, the mixed liquid in the cooling water chamber 311 of the box body 31 is pumped into the spray system 12 through the circulation pump 33 and the heat exchanger 32 to cool and cool the gas.

[0055] If the volume of the mixed liquid in the cooling chamber 11 is too much, it enters the communication balance pipe 17 through the overflow port and finally returns to the cooling water chamber 311 in the box body 31 through the return pipe 18 to realize the reflux of the mixed liquid.

[0056] Washing: The washing assembly 2 (washing area) is cleaned by the water-soluble method.

[0057] The cooled mixed gas enters the washing chamber 31 and passes through the path in the Pall rings 34. The mixed liquid in the box body 31 also enters the washing chamber 31 through the heat exchanger 32, and the cleaning spray pipe 22 is used to clean the mixed gas to remove the water-soluble gas. The treated clean gas is demisted by the demister 23 to prevent secondary pollution, thus completing the entire process.

[0058] After testing the waste gas treatment, the removal efficiency of the water-soluble gas (Cl2, HCl, HF, NH3, etc...) in the waste gas by the present utility model is > 99%, and the removal efficiency of the toxic waste gas (B2H6, SiH2Cl2, WF6, GeH4, C2F6, ClF3, etc..) is > 99%.

[0059] The present utility model combines the cooling method and the water-soluble method. The mixed gas is first cooled and then cleaned. At the same time, according to the characteristics of the mixed gas itself, the spraying liquid amounts of gas cooling and water solubility can be adjusted, so that the temperature of the gas entering the washing area can be reduced to the designed range, accelerating the efficiency of water-soluble treatment of the gas. The treated gas realizes ultra-clean emission, and the HCL emission concentration ≤ 5mg / m 3 ,

[0060] The present utility model can recover pollutants through the spray circulation assembly, and the wastewater can be reused. At the same time, the present utility model also has the advantages of small occupied volume and low maintenance cost.

[0061] Inspired by the ideal embodiments of the present utility model described above, through the above description, relevant staff can make various changes and modifications completely within the scope not deviating from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A mixed gas acid and alkali removal device, characterized in that: The invention comprises a gas cooling assembly (1) for cooling the mixed gas, a washing assembly (2) for washing the cooled mixed gas, and a spray circulation assembly (3) for providing a mixed liquid circulation loop for the gas cooling assembly (1) and the washing assembly (2). The gas cooling assembly (1) comprises a cooling chamber (11), a spray system (12), a gas blocking cap (13) and a first temperature sensor (14); a gas inlet pipe (15) is provided inside the cooling chamber (11), and the gas blocking cap (13) is arranged at the end of the gas inlet pipe (15); a spray system (12) is provided inside the cooling chamber (11) and above the gas inlet pipe (15); and a first temperature sensor (14) for detecting the temperature inside the chamber is also provided on the cooling chamber (11). The cooling chamber (11) has an air outlet at the top and a liquid overflow outlet at the side, and the air outlet is connected to the air inlet of the washing assembly (2). The liquid inlet of the spray system (12) and the washing assembly (2) are respectively connected to the liquid outlet pipeline of the spray circulation assembly (3) through corresponding connecting pipes. The liquid overflow outlet of the cooling chamber (11) is connected to the liquid return outlet pipeline of the spray circulation assembly (3). The mixed gas enters the cooling chamber (11) through the gas inlet pipe (15) and sinks under the action of the gas blocking cap (13). The spray system (12) cools the gas and then enters the washing assembly (2) for cleaning and acid or alkali removal to obtain clean gas before discharge.

2. The device for removing acid and alkali from mixed gas according to claim 1, characterized in that: The washing assembly (2) comprises a washing cabin (21), a cleaning spray pipe (22), a demister (23), a ball ring (24) and a second temperature sensor (25); the washing cabin (21) is arranged above the cooling cabin (11) and is detachably connected thereto; and the washing cabin (21) is in communication with the inner cavity of the cooling cabin (11). The washing chamber (21) is provided with a demister (23) at the upper part, a cleaning spray pipe (22) at the middle part, and a ball ring (24) at the lower part near the air inlet for increasing the gas movement path and residence time to improve the cleaning effect. The washing chamber (21) is provided with a second temperature sensor (25) near the air inlet and near the air outlet, respectively. The cleaning spray pipe (22) is connected to the liquid outlet pipeline of the spray circulation assembly (3) through a corresponding connecting pipe.

3. The mixed gas deacidification and dealkali removal device according to claim 2, characterized in that: A third temperature sensor (16) is provided on the pipeline connecting the spray system (12) and the liquid outlet of the spray circulation assembly (3), and a fourth temperature sensor (26) is provided on the pipeline connecting the cleaning spray pipe (22) and the liquid outlet of the spray circulation assembly (3).

4. The mixed gas deacidification and dealkali removal device according to claim 1, characterized in that: The spray circulation assembly (3) comprises a housing (31), a heat exchanger (32), a circulation pump (33), a liquid discharge unit (34) and a solution pumping unit (35). The box body (31) has a cooling water chamber (311) and a solution chamber (312) which are separated from each other. The cooling water chamber (311) is also connected to the liquid discharge unit (34). The solution pumping unit (35) is connected to the solution chamber (312). The liquid inlet of the heat exchanger (32) is connected to the liquid outlet of the cooling water chamber (311) through a circulation pump (33), and the liquid outlet of the heat exchanger (32) is connected to the spray system (12) and the washing assembly (2) through a corresponding connecting pipe. The heat exchange inlet and heat exchange outlet of the heat exchanger (32) are respectively connected to the outlet and inlet pipelines of an external constant temperature cooling water tank body to achieve heat exchange of the coolant, and a first pneumatic valve (36) is provided on the pipeline connected to the heat exchange inlet.

5. The device for removing acid and alkali from mixed gas according to claim 4, characterized in that: The overflow port of the cooling chamber (11) is connected to the liquid return port of the cooling water chamber (311) of the box body (31) through a connecting balance pipe (17) and a liquid return pipe (18) in sequence. A first pH sensor (19) is provided on the liquid return pipe (18). The height of the mixed liquid in the cooling chamber (11) is at the same height as the mixed liquid in the connecting balance pipe (17).

6. The mixed gas deacidification and dealkali removal device according to claim 4, characterized in that: The drainage unit (34) comprises a drainage pump (341) and a conductivity sensor (342); the liquid inlet of the drainage pump (341) is connected to the drainage outlet pipeline of the cooling water chamber (311); the conductivity sensor (342) is arranged on the top of the box (31), and its probe extends into the interior of the cooling water chamber (311).

7. The mixed gas deacidification and dealkali removal device according to claim 4, characterized in that: The solution pumping unit (35) comprises a variable membrane pump (351) and a second pH sensor (352); the inlet of the variable membrane pump (351) is connected to the solution chamber (312), and the outlet is connected to the cooling water chamber (311); the second pH sensor (352) is arranged on the top of the box (31), and its probe extends into the interior of the cooling water chamber (311).

8. The device for removing acid and alkali from mixed gas according to claim 4, characterized in that: The spray circulation assembly (3) further comprises a water replenishment unit (37), the water replenishment unit (37) comprising a water replenishment pipe (371), a liquid level sensor (372) and a second pneumatic valve (373), the water replenishment pipe (371) being connected to the cooling water chamber (311), and a second pneumatic valve (373) being provided on the pipeline of the water replenishment pipe (371), and the cooling water chamber (311) being provided with a liquid level sensor for detecting a high liquid level in the chamber and a liquid level sensor for detecting a low liquid level in the chamber.

9. The mixed gas deacidification and dealkali removal device according to claim 4, characterized in that: A third temperature sensor (16) is provided on the pipeline connecting the spray system (12) and the heat exchanger (32), and a fourth temperature sensor (26) is provided on the pipeline connecting the cleaning spray pipe (22) of the washing assembly (2) and the heat exchanger (32).

10. The device for removing acid and alkali from mixed gas according to claim 6, characterized in that: A manual valve (343) is provided on the pipeline connecting the drainage pump (341) and the cooling water chamber (311).

Images