A kind of adsorption tower body structure for air separation equipment

Abstract

The application discloses an adsorption tower body structure for air separation equipment and relates to the technical field of air separation equipment.The application comprises a bottom tank body, the top of the bottom tank body is bolted with a middle tank body, the top of the middle tank body is bolted with a gas outlet top cover, the circumferential surface of the bottom tank body is penetrated and fixedly connected with a gas inlet cover, the side surface of the gas inlet cover is fixedly connected with a gas guide pipe, the end of the gas guide pipe away from the gas inlet cover is provided with an air extractor, the inside of the bottom tank body is provided with a filler filter frame structure, the circumferential surface of the bottom tank body is provided with a heat energy recovery sterilization structure, and the inner wall of the bottom tank body is provided with a pneumatic demisting back flushing structure.The gas flow entering the filler frame can be dispersed and guided by the filler filter frame structure, the gas flow is more uniformly contacted with the filler, the uniformity of gas adsorption separation is improved, and the problem that the local gas flow speed is too fast to cause insufficient adsorption is avoided.

Description

Technical Field

[0001] This invention relates to the field of air separation equipment technology, specifically to an adsorption tower structure for air separation equipment. Background Technology

[0002] Air separation equipment, also known as air separation equipment, is a complete set of equipment that separates air into industrial gases such as oxygen and nitrogen through low-temperature distillation. The adsorption tower is the core structure used to pre-treat the raw air, remove moisture, carbon dioxide, and some hydrocarbons from the air, and plays a key role in the purity of the final separated gas and the stability of equipment operation.

[0003] According to a published structure of an adsorption tower for air separation equipment (publication number: CN222489490U), the structure includes an adsorption tower containing an adsorbent. An inlet pipe and an outlet pipe are located on the surface of the adsorption tower. A support frame is located at the bottom of the adsorption tower, and a high-temperature furnace is located inside the support frame. A low-heat baffle is located at the top inner side of the high-temperature furnace, and high-heat baffles are located at the bottom and sides inner side of the high-temperature furnace. This structure, through the inclusion of a high-temperature furnace, low-heat baffles, and high-heat baffles, allows the high-temperature furnace to generate a large amount of heat. Since the top baffle is low-heat, its insulation capacity is relatively weak, allowing heat to be transferred through the adsorption tower to its interior, heating the air inside. The heated gas expands, accelerating its passage through the adsorbent, thus increasing adsorption efficiency and indirectly improving air separation efficiency.

[0004] In the above application, heating is used to accelerate the gas flow rate to improve the adsorption efficiency. However, in actual use, after the gas enters the adsorption tower, it tends to concentrate and pass through the adsorption packing in a local area. There is still a problem that the local airflow velocity is too fast, resulting in insufficient adsorption and affecting the overall adsorption and separation effect. The air entering the tower carries a certain amount of moisture, and after adsorption is completed, the moisture tends to flow out with the airflow. Therefore, we propose an adsorption tower structure for air separation equipment. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a tower structure for an adsorption tower in an air separation unit, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an adsorption tower structure for an air separation unit, comprising a bottom tank, a middle tank bolted to the top of the bottom tank, an outlet cover bolted to the top of the middle tank, an inlet hood through and fixedly connected to the circumferential surface of the bottom tank, a guide pipe fixedly connected to the side of the inlet hood, an exhaust fan at the end of the guide pipe away from the inlet hood, a packing filter structure inside the bottom tank, a heat recovery sterilization structure on the circumferential surface of the bottom tank, and a pneumatic demisting backflushing structure on the inner wall of the bottom tank.

[0007] The packing filter frame structure includes a collar, which is fixedly connected to the inner wall of the bottom tank. A packing frame is provided on the top of the collar and is located on the inner wall of the bottom tank. A top cover is bolted to the top of the packing frame. An air guide sleeve is fixedly connected to the bottom inner side of the packing frame. A ring plate is bolted to the top of the packing frame. A slot is provided on the inner wall of the packing frame.

[0008] According to the above technical solution, a sensor is provided on the circumferential surface of the air guide pipe, and an air outlet is provided on the circumferential surface of the air inlet hood. The vertical central axis of the air outlet is perpendicular to the inner bottom of the bottom tank. The gas allows the airflow entering the bottom tank to be evenly dispersed along the tank axis, avoiding concentrated airflow impacting the packing layer, reducing the local scouring of the packing by the airflow, and extending the service life of the packing.

[0009] According to the above technical solution, the number of air guide sleeves is set to thirty-three sets, and they are arranged in a circular array along the bottom inner side of the packing frame. The height of the air guide sleeves is half of the packing frame. Multiple sets of air guide sleeves can disperse and guide the airflow entering the packing frame, so that the airflow can contact the packing more evenly, improve the uniformity of gas adsorption and separation, avoid the problem of insufficient adsorption caused by excessively fast local airflow velocity, and improve the overall effect of adsorption treatment.

[0010] According to the above technical solution, the number of ring pieces is set to four sets, and they are arranged in a circular array along the top circumference of the top cover. The circumferential surface of the ring piece is engaged with the inner wall of the slot, which makes it convenient for users to replace or replenish the packing inside the packing frame, reduces the difficulty of maintenance and replacement of packing, and improves maintenance efficiency.

[0011] According to the above technical solution, the heat recovery sterilization structure includes a spray plate, which is fixedly connected to the circumferential surface of the middle tank. A water pipe is fixedly connected through and to the side of the spray plate. A water tank with a pump is fixedly connected to the circumferential surface of the bottom tank. A heat-conducting roller is fixedly connected through the side of the water tank with a pump. A fin is fixedly connected to the circumferential surface of the heat-conducting roller. A water inlet pipe is fixedly connected to the bottom of the bottom tank. The heat-conducting roller and the fin absorb the waste heat carried by the gas to be treated in the gas hood and transfer the heat to the circulating water inside the water tank with a pump. This realizes the recovery and utilization of waste heat from the exhaust gas. At the same time, it cools the incoming gas, reducing the probability of condensation in the subsequent gas demisting process and reducing the possibility of condensate accumulation inside the equipment. Simultaneously, heating and sterilizing the internal water reduces the content of miscellaneous bacteria in the circulating water, ensuring the stability of the adsorption and separation process.

[0012] According to the above technical solution, the end of the water inlet pipe away from the bottom tank is fixedly connected to the water inlet of the pumped water tank, and the end of the water pipe away from the spray plate is fixedly connected to the water outlet of the pumped water tank, thereby realizing the circulation of water and enabling the recovered heat energy to be stably transported to the top of the middle tank for stable spraying treatment.

[0013] According to the above technical solution, the circumferential surface of the heat-conducting roller penetrates and is fixedly connected to the side of the air inlet hood. Ten sets of heat-conducting rollers are arranged in a circumferential array along the vertical central axis of the air inlet hood. Multiple sets of heat-conducting rollers can remove the heat of the gas inside the air inlet hood over a larger area, improving the efficiency of waste heat recovery. At the same time, they further reduce the air inlet temperature evenly, ensuring that the subsequent adsorption treatment is carried out within a stable temperature range.

[0014] According to the above technical solution, the pneumatic demisting backflushing structure includes a ring frame, which is fixedly connected to the inner wall of the intermediate tank. A demisting angle plate is fixedly connected to the inner wall of the ring frame. An air pump is provided on the circumferential surface of the intermediate tank. An air pipe is fixedly inserted through the top of the air pump. An air outlet pipe frame is fixedly connected to the end of the air pipe away from the air pump. The multi-section curved demisting angle plate can bend and guide the rising gas multiple times, allowing the mist droplets in the gas to adhere to the surface of the angle plate under the action of centrifugal force and inertia, thereby improving the demisting effect, preventing the mist droplets from carrying impurities into the downstream equipment, and ensuring the dryness of the gas after air separation.

[0015] According to the above technical solution, the circumferential surface of the air pipe is provided with an adjusting valve, and the side cross section of the demisting angle plate is set as a multi-segment curved shape. The adjusting valve can flexibly adjust the backflush air pressure according to the mist droplet content in the gas, ensuring that the backflush demisting effect adapts to different working conditions and improving the equipment's working condition adaptability.

[0016] According to the above technical solution, the air outlet pipe bracket is fixedly connected to the inner wall of the middle tank. The air outlet pipe bracket is located above the demister plate. It periodically back-blown the mist droplets and impurities accumulated on the surface of the demister plate, flushing them back to the bottom, avoiding clogging of the demister plate surface, ensuring the long-term stable demister effect of the demister structure, and reducing the frequency of manual cleaning and maintenance.

[0017] This invention provides a tower structure for an adsorption tower in an air separation unit. It offers the following advantages:

[0018] (1) By setting the filter rack structure, the airflow entering the filter rack can be dispersed and guided, so that the airflow can contact the filter rack more evenly, which improves the uniformity of gas adsorption and separation, avoids the problem of insufficient adsorption caused by excessive local airflow velocity, and at the same time reduces the local scouring of the filter rack layer by the airflow, extends the service life of the filter rack, and makes it easier for users to quickly replace or replenish the filter rack, reducing the difficulty of maintenance operations, improving the efficiency of equipment maintenance, and ensuring the overall effect of adsorption treatment.

[0019] (2) By setting up a heat energy recovery sterilization structure, the present invention enables the residual heat carried in the incoming air to be recovered and utilized, so that the circulating water can be heated without additional energy consumption, thereby achieving sterilization of the water. This reduces the situation where bacteria grow and adhere to the inner wall of the equipment during the circulating spraying process. It can also pre-cool the gas entering the tank, reduce the probability of condensation during subsequent processing, reduce the risk of packing failure due to moisture accumulation inside the equipment, improve the stability of the air separation adsorption process, and reduce the overall energy consumption of the equipment operation.

[0020] (3) The present invention, through the setting of the pneumatic demisting backflush structure, enables the rising gas that has undergone adsorption treatment to be fully demisted and dried. The multi-section curved demisting angle plate can effectively intercept the mist droplets and impurities in the gas through inertial separation, ensuring the dryness of the discharged gas. At the same time, the high-pressure backflush can periodically and automatically clean the mist droplets and impurities accumulated on the surface of the demisting angle plate and flush them back to the bottom of the tank for reprocessing, avoiding blockage of the demisting structure. It eliminates the need for frequent manual disassembly and cleaning, reducing maintenance costs. The backflush pressure can also be flexibly adjusted according to the mist droplet content of the gas under different working conditions, allowing the equipment to adapt to different air intake conditions, ensuring a long-term stable demisting effect, and improving the overall working condition adaptability of the equipment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional side view of the present invention;

[0022] Figure 2 This is a three-dimensional cross-sectional structural diagram of the tank body in this invention;

[0023] Figure 3This is a schematic diagram of the overall three-dimensional cross-section of the present invention;

[0024] Figure 4 This is a schematic diagram of the cross-sectional structure of the three-dimensional packing frame of the present invention;

[0025] Figure 5 This is a side view of the three-dimensional heat recovery sterilization structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the three-dimensional pneumatic demisting backflush structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the cross-sectional view of the three-dimensional air inlet hood of the present invention.

[0028] In the diagram: 1. Bottom tank; 2. Middle tank; 3. Exhaust top cover; 4. Inlet hood; 5. Exhaust fan; 6. Packing filter structure; 7. Heat recovery sterilization structure; 8. Air guide pipe; 9. Pneumatic demisting backflushing structure; 10. Sensor; 11. Regulating valve; 601. Collar ring; 602. Packing frame; 603. Top cover; 604. Air guide sleeve; 605. Ring plate; 606. Groove; 701. Spray disc; 702. Water pipe; 703. Water tank with pump; 704. Heat-conducting roller; 705. Wing; 706. Water inlet pipe; 901. Ring frame; 902. Demisting angle plate; 903. Air pump; 904. Air pipe; 905. Exhaust pipe frame. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] Please see Figures 1-7 One embodiment of the present invention is: an adsorption tower structure for an air separation unit, including a bottom tank 1, a middle tank 2 bolted to the top of the bottom tank 1, an outlet cover 3 bolted to the top of the middle tank 2, an inlet hood 4 through and fixedly connected to the circumferential surface of the bottom tank 1, an air guide pipe 8 fixedly connected to the side of the air inlet hood 4, an exhaust fan 5 provided at the end of the air guide pipe 8 away from the air inlet hood 4, a packing filter frame structure 6 provided inside the bottom tank 1, a heat recovery sterilization structure 7 provided on the circumferential surface of the bottom tank 1, and a pneumatic demisting backflushing structure 9 provided on the inner wall of the bottom tank 1.

[0031] The packing filter frame structure 6 includes a collar 601, which is fixedly connected to the inner wall of the bottom tank 1. A packing frame 602 is provided on the top of the collar 601 and is located on the inner wall of the bottom tank 1. A top cover 603 is bolted to the top of the packing frame 602. An air guide sleeve 604 is fixedly connected to the bottom inner side of the packing frame 602. A ring plate 605 is bolted to the top of the packing frame 602. A slot 606 is provided on the inner wall of the packing frame 602.

[0032] A sensor 10 is installed on the circumferential surface of the air guide pipe 8, and an air outlet is opened on the circumferential surface of the air inlet hood 4. The vertical central axis of the air outlet is perpendicular to the inner bottom of the bottom tank 1. The gas allows the airflow entering the bottom tank 1 to be evenly dispersed along the tank axis, avoiding concentrated airflow impacting the packing layer, reducing the local scouring of the packing by the airflow, and extending the service life of the packing.

[0033] There are thirty-three sets of air guide sleeves 604, which are arranged in a circular array along the bottom inner side of the packing frame 602. The height of the air guide sleeves 604 is half the height of the packing frame 602. Multiple sets of air guide sleeves 604 can disperse and guide the airflow entering the packing frame 602, so that the airflow can contact the packing more evenly, improve the uniformity of gas adsorption and separation, avoid the problem of insufficient adsorption caused by excessive local airflow velocity, and improve the overall effect of adsorption treatment.

[0034] The number of ring pieces 605 is set to four sets, and they are arranged in a circular array along the top circumference of the top cover 603. The circumferential surface of the ring piece 605 is engaged with the inner wall of the slot 606, which makes it convenient for users to replace or replenish the packing inside the packing frame 602, reducing the difficulty of maintenance and replacement of packing and improving maintenance efficiency.

[0035] During operation, after the system is started, the exhaust fan 5 forces the gas to be treated into the inlet hood 4 through the air guide pipe 8. The air outlet axis on the side wall of the inlet hood 4 is perpendicular to the bottom of the bottom tank 1. This structure forces the gas to first impact the bottom vertically after entering the tower, and then diffuse evenly upwards. This achieves initial uniform distribution of airflow across the cross-section of the tower from the source, avoiding direct local impact on the packing. The evenly rising airflow then enters the core area of ​​the packing filter frame structure 6. The gas first passes through the thirty-three sets of air guide sleeves 604 arranged in a circular array at the bottom of the packing frame 602. The sleeve structure, which is half the height of the packing frame 602, performs secondary division and guidance on the airflow, allowing it to enter the packing bed in the form of multiple uniform flows. This ensures that the contact area and contact time between the airflow and the packing are maximized, thereby significantly improving the adsorption efficiency and consistency. When maintenance is required, the bolts on the top cover 603 can be removed to easily take out or open the packing frame 602 assembly, which is snapped into the slot 606 by the ring plate 605. This enables quick replacement and replenishment of the packing and reduces the complexity of maintenance operations.

[0036] Please see Figure 1-7 Based on the above embodiments, in another embodiment of the present invention, the heat energy recovery sterilization structure 7 includes a spray plate 701, which is fixedly connected to the circumferential surface of the middle tank 2. A water pipe 702 is fixedly connected through and to the side of the spray plate 701. A pumped water tank 703 is fixedly connected to the circumferential surface of the bottom tank 1. A heat-conducting roller 704 is fixedly connected through the side of the pumped water tank 703. A wing 705 is fixedly connected to the circumferential surface of the heat-conducting roller 704. A water inlet pipe 706 is fixedly connected through the bottom of the bottom tank 1. The heat-conducting roller 704 and the wing 705 absorb the residual heat carried by the gas to be treated in the gas inlet hood 4 and transfer the heat to the circulating water inside the pumped water tank 703. This realizes the recovery and utilization of the residual heat of the waste gas. At the same time, it cools down the incoming gas, reduces the probability of condensation in the subsequent gas demisting treatment, and reduces the possibility of condensate accumulation inside the equipment. Meanwhile, heating and sterilizing the internal water reduces the content of miscellaneous bacteria in the circulating water, ensuring the stability of the adsorption and separation process.

[0037] The end of the water inlet pipe 706 away from the bottom tank 1 is fixedly connected to the water inlet of the pumped water tank 703, and the end of the water pipe 702 away from the spray plate 701 is fixedly connected to the water outlet of the pumped water tank 703, realizing the circulation of water and enabling the recovered heat energy to be stably transported to the top of the middle tank 2 for stable spraying treatment.

[0038] The circumferential surface of the heat-conducting roller 704 penetrates and is fixedly connected to the side of the air inlet hood 4. Ten sets of heat-conducting rollers 704 are arranged in a circumferential array along the vertical central axis of the air inlet hood 4. The multiple sets of heat-conducting rollers 704 can remove the heat of the gas inside the air inlet hood 4 over a larger area, improving the efficiency of waste heat recovery. At the same time, they further reduce the air inlet temperature evenly, ensuring that the subsequent adsorption treatment is carried out within a stable temperature range.

[0039] The pneumatic demisting backflushing structure 9 includes a ring frame 901, which is fixedly connected to the inner wall of the intermediate tank 2. A demisting angle plate 902 is fixedly connected to the inner wall of the ring frame 901. An air pump 903 is installed on the circumferential surface of the intermediate tank 2. An air pipe 904 is fixedly inserted through the top of the air pump 903. An air outlet pipe bracket 905 is fixedly connected to the end of the air pipe 904 away from the air pump 903. The multi-section curved demisting angle plate 902 can bend and guide the rising gas multiple times, allowing the mist droplets in the gas to adhere to the surface of the angle plate under the action of centrifugal force and inertia, thereby improving the demisting effect, preventing the mist droplets from carrying impurities into the downstream equipment, and ensuring the dryness of the gas after air separation.

[0040] A regulating valve 11 is provided on the circumferential surface of the air pipe 904, and the side section of the demisting angle plate 902 is set as a multi-segment curved shape. The regulating valve 11 can flexibly adjust the backflush air pressure according to the mist content in the gas, ensuring that the backflush demisting effect adapts to different working conditions and improves the equipment's working condition adaptability.

[0041] The exhaust pipe bracket 905 is fixedly connected to the inner wall of the middle tank 2. The exhaust pipe bracket 905 is located above the demister plate 902. It regularly back-blown the mist droplets and impurities accumulated on the surface of the demister plate 902, flushing them back to the bottom, avoiding clogging of the surface of the demister plate 902, ensuring the long-term stable demister effect of the demister structure, and reducing the frequency of manual cleaning and maintenance.

[0042] In use, its integrated working process is as follows: When the gas to be treated, containing residual heat, flows through the inlet hood 4, it comes into full contact with ten sets of heat-conducting rollers 704 and vanes 705 arranged in a circumferential array along its axis. The core function of this heat recovery sterilization structure 7 is to efficiently capture the residual heat in the gas through a large-area metal heat-conducting surface and continuously transfer the heat to the circulating water in the pumped water tank 703. This serves two purposes: first, to actively cool the incoming gas and reduce the risk of water vapor condensation in subsequent processes; and second, to use the recovered heat energy to heat the circulating water. The heated water is pumped through pipelines to the spray plate 701, which can spray the inside of the tower when needed, realizing heat energy reuse and system sterilization. After cooling, the gas enters the adsorption stage. After being purified by the packing filter structure 6, it rises to the middle tank 2. The pneumatic demisting backflushing structure 9 starts working, and the gas is forced to flow through the multiple curved demisting angle plates 902 in the ring frame 901. Its flow line is drastically changed multiple times. The residual mist droplets in the gas collide with the surface of the angle plates under the action of inertia and are efficiently captured, thereby outputting deeply dry gas, which is finally discharged through the gas outlet cover 3. In order to maintain the long-term stability of this demisting capacity, the system generates backflushing airflow periodically through the air pump 903, which is delivered to the gas outlet frame 905 located above the demisting angle plate 902 through the air pipe 904. The backflushing airflow powerfully blows the surface of the demisting angle plate 902 from top to bottom, completely stripping away the accumulated droplets and impurities and letting them fall back to the bottom of the tower, realizing the online self-cleaning of the demisting components. The regulating valve 11 is used to precisely control the backflushing intensity, so that the equipment can flexibly adapt to different gas humidity conditions.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A structure for an adsorption tower body in an air separation unit, comprising a bottom tank (1), characterized in that: The top of the bottom tank (1) is bolted to the middle tank (2), the top of the middle tank (2) is bolted to the air outlet cover (3), the circumferential surface of the bottom tank (1) is penetrated and fixedly connected to the air inlet hood (4), the side of the air inlet hood (4) is fixedly connected to the air guide pipe (8), the end of the air guide pipe (8) away from the air inlet hood (4) is provided with an exhaust fan (5), the interior of the bottom tank (1) is provided with a packing filter frame structure (6), the circumferential surface of the bottom tank (1) is provided with a heat recovery sterilization structure (7), and the inner wall of the bottom tank (1) is provided with a pneumatic demisting backflushing structure (9). The packing filter frame structure (6) includes a collar (601), which is fixedly connected to the inner wall of the bottom tank (1). A packing frame (602) is provided on the top of the collar (601). The packing frame (602) is provided on the inner wall of the bottom tank (1). A top cover (603) is bolted to the top of the packing frame (602). An air guide sleeve (604) is fixedly connected to the bottom inner side of the packing frame (602). A ring plate (605) is bolted to the top of the packing frame (602). A slot (606) is provided on the inner wall of the packing frame (602).

2. The structure of an adsorption tower for an air separation unit according to claim 1, characterized in that: The circumferential surface of the air duct (8) is provided with a sensor (10), and the circumferential surface of the air inlet hood (4) is provided with an air outlet. The vertical central axis of the air outlet is perpendicular to the inner bottom of the bottom tank (1).

3. The structure of an adsorption tower for an air separation unit according to claim 2, characterized in that: The number of air guide sleeves (604) is set in thirty-three groups and arranged in a circular array along the bottom inner side of the packing frame (602). The height of the air guide sleeves (604) is half that of the packing frame (602).

4. The structure of an adsorption tower for an air separation unit according to claim 3, characterized in that: The number of the ring pieces (605) is set in four groups and arranged in a circular array along the top circumference of the top cover (603). The circumferential surface of the ring pieces (605) is engaged with the inner wall of the slot (606).

5. The structure of an adsorption tower for an air separation unit according to claim 1, characterized in that: The heat recovery sterilization structure (7) includes a spray plate (701), which is fixedly connected to the circumferential surface of the middle tank (2). A water pipe (702) is fixedly connected through the side of the spray plate (701). A pumped water tank (703) is fixedly connected to the circumferential surface of the bottom tank (1). A heat-conducting roller (704) is fixedly connected through the side of the pumped water tank (703). A wing (705) is fixedly connected to the circumferential surface of the heat-conducting roller (704). A water inlet pipe (706) is fixedly connected through the bottom of the bottom tank (1).

6. The structure of an adsorption tower for an air separation unit according to claim 5, characterized in that: The end of the water inlet pipe (706) away from the bottom tank (1) is fixedly connected to the water inlet of the pumped water tank (703), and the end of the water pipe (702) away from the spray plate (701) is fixedly connected to the water outlet of the pumped water tank (703).

7. The structure of an adsorption tower for an air separation unit according to claim 6, characterized in that: The circumferential surface of the heat-conducting roller (704) penetrates and is fixedly connected to the side of the air inlet hood (4). Ten sets of the heat-conducting roller (704) are arranged in a circumferential array along the vertical central axis of the air inlet hood (4).

8. The structure of an adsorption tower for an air separation unit according to claim 1, characterized in that: The pneumatic demisting backflushing structure (9) includes a ring frame (901), which is fixedly connected to the inner wall of the middle tank (2). A demisting angle plate (902) is fixedly connected to the inner wall of the ring frame (901). An air pump (903) is provided on the circumferential surface of the middle tank (2). An air pipe (904) is fixedly inserted through the top of the air pump (903). An air outlet pipe bracket (905) is fixedly connected to the end of the air pipe (904) away from the air pump (903).

9. The structure of an adsorption tower body for an air separation unit according to claim 8, characterized in that: The circumferential surface of the air pipe (904) is provided with a regulating valve (11), and the side cross section of the demisting angle plate (902) is configured as a multi-segment curved shape.

10. The structure of an adsorption tower body for an air separation unit according to claim 9, characterized in that: The vent pipe bracket (905) is fixedly connected to the inner wall of the middle tank (2), and the vent pipe bracket (905) is located above the demisting angle plate (902).

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