Multistage adsorption purification device for treating PTA refining tail gas

Abstract

The utility model relates to multistage adsorption purification technical field discloses a multistage adsorption purification device for PTA refining tail gas treatment, including a multistage adsorption purification device for PTA refining tail gas treatment, including the air inlet pipe, the right side intercommunication of air inlet pipe has the processing box, the inside top of processing box is fixedly connected with a plurality of baffle, the inside top left and right ends intercommunication of processing box has a plurality of high -pressure pipes, a plurality of high -pressure pipes's outer wall all are fixedly connected with a plurality of spray nozzles, the inside right side intercommunication of processing box has the water leakage pipe, the front bottom intercommunication of water leakage pipe has the storage box, the front top of storage box is fixedly connected with water pump, the left top intercommunication of water pump has the transmission pipe. In the utility model, realize the effective purification treatment to PTA refining tail gas, prolong the residence time of tail gas in the device to improve the purification effect, realize the recycling of water resource simultaneously, reduce operating cost.

Description

Technical Field

[0001] This utility model relates to the field of multi-stage adsorption purification technology, and in particular to a multi-stage adsorption purification device for PTA refining tail gas treatment. Background Technology

[0002] In modern industrial production, PTA is an important chemical raw material widely used in the manufacture of polyester resin and polyethylene terephthalate plastic bottles. The refining process of PTA generates a large amount of exhaust gas containing various pollutants. Direct emission without effective treatment will not only waste resources but also cause serious pollution to the atmospheric environment.

[0003] In the field of exhaust gas treatment, liquid absorption is a common method. It utilizes a specific absorbent liquid to fully contact the exhaust gas, allowing pollutants in the exhaust gas to dissolve in the absorbent liquid, thereby achieving purification. In PTA refining exhaust gas treatment, water or alkaline solutions are commonly used as absorbent liquids. The exhaust gas and absorbent liquid are mixed in the absorption tower through spraying or bubbling. The method is relatively simple to operate and can handle large flow rates of exhaust gas. It is used in scenarios where the requirements for exhaust gas purification are not extremely high, and the equipment construction cost is also within an acceptable range.

[0004] Existing liquid absorption methods for PTA refining tail gas treatment have many problems. Current devices use a single-tower absorption structure, meaning the tail gas only contacts the absorbent liquid once within a single tower. As the tail gas continues to flow in, the pollutant concentration in the absorbent liquid rises continuously, significantly reducing absorption efficiency. When the pollutant concentration fluctuates greatly, the single-tower absorption device cannot respond promptly to sudden increases in concentration, making it difficult to ensure stable and efficient absorption and achieving the required tail gas purification effect. Due to design limitations of the absorbent liquid circulation device, the absorbent liquid is unevenly distributed within the tower, with excessive flow rates in some areas. This results in insufficient contact between the tail gas and the absorbent liquid, leading to the discharge of large amounts of low-concentration, highly volatile pollutants with the tail gas, posing a potential threat to the environment. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a multi-stage adsorption purification device for PTA refining tail gas treatment, aiming to improve the problems of slow treatment efficiency and high safety hazards in the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a multi-stage adsorption purification device for PTA refining tail gas treatment, comprising an air inlet pipe, a treatment box connected to the right side of the air inlet pipe, multiple baffles fixedly connected to the top inner side of the treatment box, multiple high-pressure pipes connected to the left and right ends of the top inner side of the treatment box, multiple spray nozzles fixedly connected to the outer walls of the multiple high-pressure pipes, a water leakage pipe connected to the right side of the inside of the treatment box, a storage box connected to the bottom front side of the water leakage pipe, a water pump fixedly connected to the top front side of the storage box, a transmission pipe connected to the top left side of the water pump, a diversion pipe connected to the top end of the transmission pipe, a diversion pipe connected to the top right side of the multiple high-pressure pipes, an air outlet pipe connected to the upper rear side of the air inlet pipe, and an isolation mechanism provided on the left side of the air inlet pipe, the isolation mechanism being used to improve the safety of the device and protect the normal operation of the device.

[0007] As a further description of the above technical solution: The isolation mechanism includes a smoke box, the top left side of which is fixedly connected to the left side of the air inlet pipe. A hydraulic actuator is fixedly connected to the top rear side of the smoke box. Two hydraulic presses are fixedly connected to the front side of the hydraulic actuator. A hydraulic rod is fixedly connected to the front side of each of the two hydraulic presses. A fixing block is fixedly connected to the front side of each of the two hydraulic rods. The same isolation plate is fixedly connected to the front side of each of the two fixing blocks. The outer side of the isolation plate is slidably connected to the middle of the inner side of the smoke box.

[0008] As a further description of the above technical solution: A rubber pad is fixedly connected to the bottom of the storage box, and support legs are fixedly connected to the four corners of the bottom of the air intake pipe.

[0009] As a further description of the above technical solution: A controller is fixedly connected to the front of the storage box, and a water level display meter is fixedly connected to the front of the controller.

[0010] As a further description of the above technical solution: A detector is fixedly connected to the top right side of the hydraulic unit, and a smoke detection tube is connected to the top of the detector and to the left rear end of the processing box.

[0011] As a further description of the above technical solution: Alarm lights are fixedly connected to the four corners of the top of the processing box, and filters are fixedly connected to the inner wall of the air outlet pipe.

[0012] As a further description of the above technical solution: A control pipe is connected to the bottom left side of the smoke box, and a control valve is connected inside the control pipe.

[0013] As a further description of the above technical solution: An inclined plate is fixedly connected to the bottom inner side of the processing box, and a protective plate is fixedly connected to the top right side of the processing box.

[0014] The beneficial effects of this utility model are as follows: 1. In this utility model, effective purification treatment of PTA refining tail gas is achieved, the residence time of tail gas in the device is extended to improve the purification effect, water resources are recycled, operating costs are reduced, and the filter plate is subjected to secondary filtration to ensure the normal operation of the device.

[0015] 2. In this utility model, the intake pipe is quickly isolated in the event of a dangerous situation, preventing the exhaust gas from continuing to enter the device, effectively protecting other components inside the device from damage, improving the safety of device operation, ensuring the stability and reliability of the entire PTA refining exhaust gas treatment process, and preventing the exhaust gas from being directly discharged into the atmosphere when the device malfunctions. Attached Figure Description

[0016] Figure 1 This is a perspective view of a multi-stage adsorption purification device for PTA refining tail gas treatment proposed in this utility model; Figure 2 This is a front view of a multi-stage adsorption purification device for PTA refining tail gas treatment proposed in this utility model; Figure 3 This is a rear view of a multi-stage adsorption purification device for treating PTA refining tail gas proposed in this utility model. Figure 4 This is a cross-sectional view of the isolation mechanism of a multi-stage adsorption purification device for PTA refining tail gas treatment proposed in this utility model. Figure 5 This is a cross-sectional view of the treatment box of a multi-stage adsorption purification device for PTA refining tail gas treatment proposed in this utility model. Figure 6 This is a schematic diagram of the control valve of a multi-stage adsorption purification device for PTA refining tail gas treatment proposed in this utility model.

[0017] Legend: 1. Air inlet pipe; 2. Isolation mechanism; 201. Smoke box; 202. Hydraulic unit; 203. Hydraulic press; 204. Hydraulic rod; 205. Fixing block; 206. Isolation plate; 3. Processing box; 4. Baffle; 5. High-pressure pipe; 6. Spray nozzle; 7. Leakage pipe; 8. Storage box; 9. Water pump; 10. Transmission pipe; 11. Diverter pipe; 12. Air outlet pipe; 13. Rubber pad; 14. Controller; 15. Water volume display meter; 16. Smoke detection pipe; 17. Detector; 18. Alarm light; 19. Filter; 20. Control pipe; 21. Control valve; 22. Inclined plate; 23. Support leg; 24. Protective plate. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figure 1 , Figure 2 and Figure 5 This utility model provides an embodiment of a multi-stage adsorption purification device for PTA refining tail gas treatment, including an inlet pipe 1 for introducing the tail gas to be treated. A treatment box 3 is connected to the right side of the inlet pipe 1. The treatment box 3 is a device for tail gas purification, providing space for the purification reaction. Multiple baffles 4 are fixedly connected to the top inner side of the treatment box 3, changing the flow path of the tail gas within the treatment box 3 and improving the purification effect. Multiple high-pressure pipes 5 are connected to the left and right ends of the top inner side of the treatment box 3, conveying high-pressure liquid. Multiple spray nozzles 6 are fixedly connected to the outer walls of the high-pressure pipes 5, atomizing and spraying the liquid from the high-pressure pipes 5 to react with pollutants in the tail gas. A drain pipe 7 is connected to the right inner side of the treatment box 3, discharging wastewater generated during the treatment process. A storage box 8 is connected to the bottom front side of the drain pipe 7, storing the wastewater discharged from the drain pipe 7. A water pump 9 is fixedly connected to the top front side of the tank 8. The water pump 9 can extract and pressurize the wastewater in the storage tank 8 to provide power for the recycling of wastewater. A transmission pipe 10 is connected to the top left side of the water pump 9. The transmission pipe 10 is used to transmit the wastewater extracted by the water pump 9 to the diversion pipe 11 to realize the directional transportation of wastewater. The top of the transmission pipe 10 is connected to the diversion pipe 11. The diversion pipe 11 is used to evenly distribute the wastewater transported by the transmission pipe 10 to multiple high-pressure pipes 5 to ensure that each spray nozzle 6 has a stable liquid. The inside of the diversion pipe 11 is connected to the top right side of multiple high-pressure pipes 5. An exhaust pipe 12 is connected to the upper rear side of the air inlet pipe 1. The exhaust pipe 12 is used to discharge the purified exhaust gas. An isolation mechanism 2 is set on the left side of the air inlet pipe 1. The isolation mechanism 2 is used to improve the safety of the device and protect the normal operation of the device. When the device malfunctions, the isolation mechanism 2 can cut off the gas flow in the air inlet pipe 1 in time to prevent the danger from spreading. Specifically, the exhaust gas to be treated enters the device through the inlet pipe 1. The inlet pipe 1 serves as the inlet channel for the exhaust gas, ensuring that it can enter the treatment stage stably and smoothly. After entering, the exhaust gas reaches the treatment chamber 3, which provides a reaction space for exhaust gas purification. Multiple baffles 4 on the top inner side of the treatment chamber 3 function to change the flow path of the exhaust gas as it flows within the chamber, allowing it to come into more complete contact with the treatment medium and improving purification efficiency. Multiple high-pressure pipes 5 connected to the left and right ends of the top inner side of the treatment chamber 3 are responsible for transporting high-pressure liquid. The high-pressure liquid is transported to multiple spray nozzles 6 on the outer wall of the high-pressure pipes 5. The spray nozzles 6 atomize the high-pressure liquid and spray it into the treatment chamber 3, where it reacts with the pollutants in the exhaust gas, effectively removing various pollutants. Wastewater generated during the purification reaction is discharged through a drain pipe 7 connected to the right side inside the treatment chamber 3. The drain pipe 7 guides the wastewater to a storage tank 8 for storage. The storage tank 8 is specifically designed to store this wastewater. The water pump 9 at the top front of the storage tank 8 will extract and pressurize the wastewater inside the tank. The pressurized wastewater is then transported to the distribution pipe 11 through the transmission pipe 10. The transmission pipe 10 precisely achieves the directional transmission of the wastewater, and the distribution pipe 11 evenly distributes the wastewater into multiple high-pressure pipes 5, ensuring a stable liquid supply to each spray nozzle 6, thereby maintaining a continuous spray purification reaction. The purified exhaust gas is discharged from the device through the exhaust pipe 12 connected to the upper middle part of the rear of the inlet pipe 1, allowing the qualified exhaust gas to be safely discharged into the external environment. When the device malfunctions, such as excessive pressure or abnormal temperature affecting the safe operation of the device, the isolation mechanism 2 set on the left side of the inlet pipe 1 will come into play. The isolation mechanism 2 can quickly cut off the gas flow into the inlet pipe 1, preventing the danger from spreading further and ensuring the safety of the device and the surrounding environment, thus efficiently completing the multi-stage adsorption purification treatment of PTA refined exhaust gas.

[0020] Reference Figure 1 , Figure 3 and Figure 4The isolation mechanism 2 includes a smoke passage box 201, which is used to pass flue gas. The top left side is fixedly connected to the left side of the intake pipe 1, allowing the flue gas from the intake pipe 1 to smoothly enter the smoke passage box 201. A hydraulic actuator 202 is fixedly connected to the top rear side of the smoke passage box 201, providing power support for the hydraulic system. Two hydraulic presses 203 are fixedly connected to the front side, utilizing the power provided by the hydraulic actuator 202. Hydraulic rods 204 are fixedly connected to the front of each of the two hydraulic presses 203, allowing the hydraulic rods 204 to operate under hydraulic pressure. Driven by the machine 203, it makes linear motion to achieve the telescopic function. The front sides of the two hydraulic rods 204 are fixedly connected to the fixing blocks 205. The fixing blocks 205 serve to connect the hydraulic rods 204 and the isolation plate 206 to ensure that the connection between the two is stable. The front sides of the two fixing blocks 205 are fixedly connected to the same isolation plate 206. The isolation plate 206 can move under the drive of the hydraulic rods 204 to isolate the flue gas. It is externally slidably connected to the inner middle of the smoke box 201 to ensure that the isolation plate 206 can slide smoothly in the smoke box 201. Specifically, the flue gas in the intake pipe 1 flows towards the smoke box 201. The smoke box 201 serves as a channel for the flue gas, and its top left side is connected to the intake pipe 1 to ensure that the flue gas can be smoothly introduced. When it is necessary to isolate the exhaust gas, the hydraulic device 202 starts to work, providing stable and continuous power to the hydraulic device. Two hydraulic presses 203 are connected to the front of the hydraulic device 202. The two hydraulic presses 203 receive power from the hydraulic device 202. Driven by the hydraulic presses 203, the connected hydraulic rod 204 begins to move linearly. The hydraulic rod 204 can realize the extension and retraction function. As the hydraulic rod 204 extends and retracts, the fixed block 205 also moves in translation. The fixed block 205 plays a connecting role, firmly connecting the hydraulic rod 204 and the isolation plate 206. The isolation plate 206 isolates the exhaust gas through the push of the hydraulic device, improving the safety of the device operation.

[0021] Reference Figure 1 , Figure 2 and Figure 3A rubber pad 13 is fixedly connected to the bottom of the storage box 8. The rubber pad 13 serves to absorb shock and prevent slippage, effectively reducing wear caused by vibration during placement. Support legs 23 are fixedly connected to the four corners of the bottom of the air intake pipe 1. The support legs 23 support the air intake pipe 1, ensuring its stable placement and stability during the introduction of exhaust gas. A controller 14 is fixedly connected to the front of the storage box 8. The controller 14 can regulate the operating parameters of the device, achieving precise management of the device's operating status. A water level display 15 is fixedly connected to the front side. The water level display 15 is used to observe the water level in the storage tank 8, so that the operator can keep track of the amount of wastewater stored in the storage tank 8 in real time. Alarm lights 18 are fixedly connected to the four corners of the top of the treatment tank 3. The alarm lights 18 will emit a warning signal when the device malfunctions, reminding the operator to deal with it in time and ensuring the safe operation of the device. A filter 19 is fixedly connected to the inner wall of the exhaust pipe 12. The filter 19 further filters and purifies the residual impurities in the exhaust gas, ensuring that the exhaust gas meets higher environmental protection standards. Specifically, the support legs 23 connected to the four corners at the bottom of the intake pipe 1 ensure that the intake pipe 1 is placed stably, guaranteeing a stable and continuous flow of exhaust gas into the device, thus ensuring the stability of the exhaust gas introduction process. The alarm lights 18 at the four corners at the top of the treatment box 3 will immediately emit warning signals if conditions such as abnormal pressure or excessive temperature affect the normal operation of the device. Upon receiving the signal, the operator can promptly inspect and address the issue, effectively ensuring the safe and stable operation of the device. The rubber pads 13 connected to the bottom of the storage box 8 function to absorb shock and reduce the impact of external vibrations on the storage box 8, extending the lifespan of the storage box 8. The lifespan of the storage tank 8 is controlled by the controller 14 connected to the front, which regulates the operating parameters of the device and achieves precise management of the overall operating status of the device. The water volume display 15 connected to the front of the controller 14 displays the water volume in the storage tank 8 in an intuitive way, allowing operators to monitor the wastewater storage volume in the storage tank 8 in real time and to arrange wastewater treatment work in a timely manner. The exhaust gas purified by the treatment tank 3 is discharged through the exhaust pipe 12. The filter 19 connected to the inner wall of the exhaust pipe 12 performs secondary filtration on the purified exhaust gas, further removing the fine impurities remaining in the exhaust gas, ensuring that the exhaust gas finally discharged into the atmosphere meets higher environmental protection standards and reduces pollution to the environment.

[0022] Reference Figure 1 , Figure 3 and Figure 6A detector 17 is connected to the top right side of the hydraulic unit 202. The detector 17 is used to detect the concentration of flue gas and can acquire flue gas data in real time. A smoke detection pipe 16 is connected to the top of the detector 17 and to the left rear end of the processing box 3. The smoke detection pipe 16 guides the smoke in the processing box 3 to the detector 17 for detection, achieving effective monitoring of the smoke situation in the processing box 3. A control pipe 20 is connected to the bottom left side of the smoke box 201. The control pipe 20 is used to control the flow of flue gas in the smoke box 201 or to adjust the flow rate. The flow direction and flow rate of the flue gas are controlled. The control pipe 20 is connected to a control valve 21. The control valve 21 precisely controls the on / off state and flow rate of the flue gas in the control pipe 20, so as to achieve precise regulation of the flue gas flow. An inclined plate 22 is connected to the bottom of the inner side of the treatment box 3. The inclined plate 22 causes the liquid or impurities in the treatment box 3 to flow or gather in a specific direction, which facilitates the cleaning and discharge of impurities in the treatment box 3. A protective plate 24 is fixedly connected to the top right side of the treatment box 3. The protective plate 24 prevents rain or other factors from damaging the diversion pipe 11. Specifically, the flue gas in the intake pipe 1 enters the smoke chamber 201. The smoke chamber 201 serves as a flue gas passage, receiving the flue gas flowing in from the intake pipe 1. The detector 17 on the top right side of the hydraulic unit 202 is connected to the treatment box 3 through the smoke detection pipe 16 to detect the smoke concentration in the treatment box 3 in real time. The control pipe 20 and the internal control valve 21 at the bottom left side of the smoke chamber 201 can adjust the flow and volume of the flue gas. The inclined plate 22 at the bottom inner side of the treatment box 3 can cause the liquid and impurities in the treatment box 3 to flow and gather in a specific direction, making it convenient to clean and discharge impurities. The protective plate 24 on the top right side of the treatment box 3 prevents rain and other factors from damaging the diversion pipe 11, ensuring the normal operation of the device.

[0023] Working principle: The exhaust gas to be treated enters the device through the inlet pipe 1. After entering, the exhaust gas reaches the treatment chamber 3, which provides a reaction space for exhaust gas purification. As the exhaust gas flows within the treatment chamber 3, its flow path changes, allowing it to come into more thorough contact with the treatment medium and improving purification efficiency. Multiple high-pressure pipes 5 are responsible for conveying high-pressure liquid. The high-pressure liquid is delivered to multiple spray nozzles 6 on the outer wall of the high-pressure pipes 5. The spray nozzles 6 atomize the high-pressure liquid and spray it into the treatment chamber 3, where it reacts with the pollutants in the exhaust gas, effectively removing various pollutants from the exhaust gas. Wastewater generated during the purification reaction process is also removed. The wastewater will be discharged through the drain pipe 7 connected to the right side of the treatment tank 3. The drain pipe 7 guides the wastewater to the storage tank 8, which is specifically used to store the wastewater. The water pump 9 extracts and pressurizes the wastewater in the tank. The pressurized wastewater is transported to the diversion pipe 11 through the transmission pipe 10. The transmission pipe 10 accurately realizes the directional transmission of the wastewater. The diversion pipe 11 evenly distributes the wastewater into multiple high-pressure pipes 5, ensuring that each spray nozzle 6 has a stable liquid supply, thereby maintaining a continuous spray purification reaction. The exhaust gas after purification is discharged from the exhaust pipe 12, so that the qualified exhaust gas is safely discharged into the external environment. When flue gas needs to be isolated, the hydraulic device operates, and the hydraulic rod 204 extends forward, driving the fixed block 205 and the connected isolation plate 206 to move forward. The isolation plate 206 slides in the middle of the inner side of the flue gas box 201. The close fit and good sliding performance of the inner side of the flue gas box 201 allow for smooth movement, thereby blocking the flue gas flow path in the flue gas box 201 and achieving flue gas isolation. When flue gas flow needs to be restored, the hydraulic rod 204 retracts, driving the isolation plate 206 to move backward, opening the flue gas passage in the flue gas box 201. Through the precise control of the hydraulic device, the isolation mechanism 2 can efficiently and stably achieve flue gas isolation and flow control.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-stage adsorption purification device for PTA refining tail gas treatment, comprising an inlet pipe (1), characterized in that: The right side of the air inlet pipe (1) is connected to the processing box (3). Multiple baffles (4) are fixedly connected to the top of the inner side of the processing box (3). Multiple high-pressure pipes (5) are connected to the left and right ends of the top of the inner side of the processing box (3). Multiple spray nozzles (6) are fixedly connected to the outer walls of the multiple high-pressure pipes (5). The right side of the inside of the processing box (3) is connected to the water leakage pipe (7). The bottom front side of the water leakage pipe (7) is connected to the storage box (8). The top front side of the storage box (8) is fixedly connected to the water pump (9). The top left side of the water pump (9) is connected to the transmission pipe (10). The top end of the transmission pipe (10) is connected to the diversion pipe (11). The inside of the diversion pipe (11) is connected to the top right side of the multiple high-pressure pipes (5). The upper rear side of the air inlet pipe (1) is connected to the air outlet pipe (12). An isolation mechanism (2) is provided on the left side of the air inlet pipe (1). The isolation mechanism (2) is used to improve the safety of the device and protect the normal operation of the device.

2. The multi-stage adsorption purification device for PTA refining tail gas treatment according to claim 1, characterized in that: The isolation mechanism (2) includes a smoke box (201). The top left side of the smoke box (201) is fixedly connected to the left side of the air inlet pipe (1). A hydraulic actuator (202) is fixedly connected to the top rear side of the smoke box (201). Two hydraulic presses (203) are fixedly connected to the front side of the hydraulic actuator (202). A hydraulic rod (204) is fixedly connected to the front side of each of the two hydraulic presses (203). A fixing block (205) is fixedly connected to the front side of each of the two hydraulic rods (204). The same isolation plate (206) is fixedly connected to the front side of each of the two fixing blocks (205). The outside of the isolation plate (206) is slidably connected to the smoke box. The inner middle part of the box (201).

3. The multi-stage adsorption purification device for PTA refining tail gas treatment according to claim 1, characterized in that: The bottom of the storage box (8) is fixedly connected to a rubber pad (13), and the four corners of the bottom of the air inlet pipe (1) are all fixedly connected to support legs (23).

4. The multi-stage adsorption purification device for PTA refining tail gas treatment according to claim 1, characterized in that: A controller (14) is fixedly connected to the front of the storage box (8), and a water level display meter (15) is fixedly connected to the front of the controller (14).

5. The multi-stage adsorption purification device for PTA refining tail gas treatment according to claim 2, characterized in that: A detector (17) is fixedly connected to the top right side of the hydraulic unit (202). The top of the detector (17) is connected to a smoke detection tube (16) and to the left rear end of the processing box (3).

6. The multi-stage adsorption purification device for PTA refining tail gas treatment according to claim 1, characterized in that: Alarm lights (18) are fixedly connected to the four corners of the top of the processing box (3), and filters (19) are fixedly connected to the inner wall of the air outlet pipe (12).

7. The multi-stage adsorption purification device for PTA refining tail gas treatment according to claim 2, characterized in that: The bottom left side of the smoke box (201) is connected to a control pipe (20), and the inside of the control pipe (20) is connected to a control valve (21).

8. The multi-stage adsorption purification device for PTA refining tail gas treatment according to claim 1, characterized in that: An inclined plate (22) is fixedly connected to the bottom inner side of the processing box (3), and a protective plate (24) is fixedly connected to the top right side of the processing box (3).

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