PSA adsorption tower

Abstract

The utility model relates to a PSA (Pressure Swing Adsorption) tower which comprises a cylinder body, an upper sealing head is fixed at the upper end of the cylinder body, a lower sealing head is fixed at the lower end of the cylinder body, the upper sealing head is fixedly connected with a top pipe, a flange plate is fixed at the upper end of the top pipe, the lower end face of the flange plate is fixedly connected with one end of a spring, the spring is arranged in the top pipe, and the lower end face of the flange plate is fixedly connected with the other end of the spring. The other end of the spring is fixedly connected with a first filter plate assembly, the first filter plate assembly is also arranged in the top pipe, the lower end socket is fixedly connected with the air inlet pipe, a pressurizing grid is arranged in the barrel and comprises a fixing plate, the fixing plate is fixedly connected with the inner wall of the barrel, the center of the fixing plate is fixedly connected with an outer ring of a bearing, and the fixing plate is fixedly connected with the outer ring of the bearing. A bearing inner ring is fixedly connected with a rotating rod, the upper end of the rotating rod is fixedly connected with a rotating plate, a plurality of third communicating holes are formed in the fixing plate, a plurality of fifth communicating holes are formed in the rotating plate, and the distance between every two adjacent third communicating holes is larger than the diameter of each fifth communicating hole. The diameter of the fifth communicating hole is not larger than that of the third communicating hole.

Description

Technical Field

[0001] This utility model relates to the field of adsorption tower technology, and in particular to the pressure boosting grid of PSA adsorption tower. Background Technology

[0002] The PSA adsorption tower is the core component of the PSA pressure swing adsorption tower, used to achieve gas separation. It is mainly made of materials such as stainless steel, possessing high strength and corrosion resistance. The adsorption tower typically contains adsorbents, such as activated carbon or molecular sieves. The working principle of the PSA adsorption tower is to utilize the adsorption effect of the adsorbent to adsorb the target components in the mixed gas onto the adsorbent surface, thereby achieving gas separation. However, existing adsorption towers have long pressurization or depressurization times, affecting production efficiency. Utility Model Content

[0003] This invention proposes a pressure boosting grid for a PSA adsorption tower and an adsorption tower including the pressure boosting grid.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A PSA adsorption tower includes a cylindrical body, in which a pressure boosting grid is installed. The pressure boosting grid includes a fixed plate, which is circumferentially fixed to the inner wall of the cylindrical body. The center of the fixed plate is fixedly connected to the outer ring of a bearing, and the inner ring of the bearing is fixedly connected to a rotating rod. The upper end of the rotating rod is fixedly connected to a rotating plate. The central axis of the cylindrical body, the central axis of the fixed plate, the central axis of the rotating plate, and the central axis of the rotating rod coincide. The fixed plate is provided with a plurality of connecting holes 3, and the rotating plate is provided with a plurality of connecting holes 5. The distance between two adjacent connecting holes 3 is greater than the diameter of the connecting hole 5, and the diameter of the connecting hole 5 is not greater than the diameter of the connecting hole 3.

[0006] Furthermore, the fixing plate includes a plate body three, which is provided with four connecting holes three. Each connecting hole three is equidistant from the center of the plate body three, and the angle between two adjacent connecting holes three is 90°. The center of the plate body three is provided with a center hole one, which is fixedly connected to the outer ring of the bearing.

[0007] Furthermore, the plate body three is also provided with four connecting holes four, each connecting hole four is located between each connecting hole three and the center of the plate body three, and the center of each connecting hole three, the center of each connecting hole four and the center of the plate body three are on a straight line.

[0008] Furthermore, the rotating plate includes a plate body four, which has four connecting holes five. Each connecting hole five is equidistant from the center of the plate body four, and the angle between two adjacent connecting holes five is 90°. A center hole two is provided at the center of the plate body four, and the center hole two is fixedly connected to the rotating plate.

[0009] Furthermore, the plate body four is also provided with four connecting holes six, each connecting hole six is ​​located between each connecting hole five and the center of the plate body four, and the center of each connecting hole five, the center of each connecting hole six and the center of the plate body four are on a straight line.

[0010] Furthermore, the distance between two adjacent connecting holes four on the plate body three of the fixed plate is greater than the diameter of the connecting hole six on the rotating plate.

[0011] Furthermore, the diameter of connecting hole six is ​​no greater than the diameter of connecting hole four.

[0012] Furthermore, an upper end cap is fixed to the upper end of the cylinder, and a lower end cap is fixed to the lower end of the cylinder. The upper end cap is fixedly connected to the top pipe. A flange is fixed to the upper end of the top pipe. The lower end face of the flange is fixedly connected to one end of a spring. The spring is disposed in the top pipe. The other end of the spring is fixedly connected to a filter plate assembly. The filter plate assembly is also disposed in the top pipe. The lower end cap is fixedly connected to the air inlet pipe.

[0013] Furthermore, a rotating handle is fixed to the bottom of the rotating rod, and a position-fixed indicator disc is provided at the lower part of the lower end cap.

[0014] Furthermore, the flange is fixedly connected to the top cover by bolts, and the top cover is provided with an air vent pipe.

[0015] Furthermore, the filter plate assembly includes a pressure plate, which is fixed together with a fixing ring by a fixing bolt, and a filter screen is disposed between the pressure plate and the fixing ring.

[0016] Furthermore, the pressure plate includes a plate body. A circular fixing groove is provided on one end face of the plate body, and a through hole is provided on the plate body. The through hole is a through hole. A connecting hole is provided at the center of the end face of the plate body with the fixing groove. A plurality of connecting holes are provided on the other end face of the plate body. The connecting holes are threaded holes. The connecting holes are connected to the fixing bolts by threads. The connecting holes are threaded holes and are connected to the lifting ring by threads.

[0017] Furthermore, a filter plate assembly two is fixed on the cylinder. The filter assembly two includes a fastening plate two, a fastening plate three, and a fixing ring two. The fastening plate two, the fastening plate three, and the fixing ring two are connected by a fixing bolt two. The fixing bolt two passes through the fastening plate two, the fastening plate three, and the fixing ring two in sequence. A nut is installed on the fixing bolt two. The fixing bolt two and the nut make the fastening plate two, the fastening plate three, and the fixing ring two tightly pressed together. A filter screen two is provided between the fastening plate two and the fastening plate three.

[0018] Furthermore, the fastening plate two includes a plate body two, and the plate body two is provided with a plurality of connecting holes two.

[0019] Furthermore, the shape and structure of the third fastening plate are completely identical to those of the second fastening plate.

[0020] Furthermore, a flow divider plate is fixed inside the lower end cap. The flow divider plate includes a cover plate, the end face of which is fixedly connected to the short pipe. Several short plates are fixed to the outer wall of the short pipe, and the ends of the short plates are fixedly connected to the inner wall of the lower end cap.

[0021] Furthermore, the lower end of the lower end cap is fixed with several supports.

[0022] Beneficial effects: This utility model, by rotating the rotating handle, causes the rotating rod to rotate axially in the bearing, and the rotating rod causes the rotating plate to rotate. By rotating the rotating handle and the indicator, the positions of the connecting holes five and three, and the connecting holes six and four on the rotating plate change, thereby adjusting the air passage of the filter plate assembly two and reducing the time required to adjust the pressure. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a structural schematic diagram of the middle filter plate assembly of this utility model;

[0025] Figure 3 This is a utility model Figure 2 Bottom view of the middle pressure plate 1;

[0026] Figure 4 This is a utility model Figure 2 Cross-sectional view of the middle pressure plate;

[0027] Figure 5 This is a utility model Figure 2 Top view of the middle pressure plate 1;

[0028] Figure 6 This is a schematic diagram of the structure of filter plate assembly two in this utility model;

[0029] Figure 7 This is a utility model Figure 5 Top view of the second central fastener;

[0030] Figure 8 This is a top view of the diverter plate in this utility model;

[0031] Figure 9 This is a cross-sectional view of the diverter plate in this utility model;

[0032] Figure 10This is a cross-sectional view of the booster grid in this utility model;

[0033] Figure 11 This is a top view of the fixing plate in this utility model;

[0034] Figure 12 This is a top view of the rotating plate in this utility model;

[0035] Figure 13 This is a schematic diagram of the fixed plate and the rotating plate of this utility model when they overlap;

[0036] Figure 14 This is a schematic diagram showing how the fixing plate of this utility model completely blocks the rotating plate;

[0037] Figure 15 This is a schematic diagram of the intersection of the fixed plate and the rotating plate of this utility model;

[0038] Figure label:

[0039] 1 Top cover, 2 Flange, 3 Spring, 4 Top pipe, 5 Filter plate assembly one, 6 Upper head, 7 Cylinder, 8 Filter plate assembly two, 9 Diverter plate, 10 Lower head, 11 Inlet pipe, 12 Support, 13 Pressure booster grid;

[0040] 501 One fixing bolt, 502 One fixing ring, 503 One filter screen, 504 One pressure plate, 505 One lifting ring;

[0041] 50501 Plate body one, 50502 Fixing groove, 50503 Connecting hole one, 50504 Connecting hole one, 50505 Connecting hole two;

[0042] 801 Fastening plate two, 802 Filter screen two, 803 Fastening plate three, 804 Fixing ring two, 805 Fixing bolt two, 806 Nut;

[0043] 80101 Plate body two, 80102 Connecting hole two;

[0044] 901 cover plate, 902 short pipe, 903 short plate;

[0045] 1301 Fixed plate, 1302 Bearing, 1303 Rotating rod, 1304 Rotating plate, 1305 Rotating handle;

[0046] 130101 Plate body three, 130102 Connecting hole three, 130103 Connecting hole four, 130104 Center hole one;

[0047] 130401 Plate body four, 130402 Connecting hole five, 130403 Connecting hole six, 130404 Center hole two. Detailed Implementation

[0048] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0049] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] Reference Figure 1-15 A PSA adsorption tower includes a cylindrical body 7, with an upper end cap 6 fixed to the upper end of the cylindrical body 7 and a lower end cap 10 fixed to the lower end of the cylindrical body 7. The upper end cap 6 is fixedly connected to a top pipe 4. A flange 2 is fixedly fixed to the upper end of the top pipe 4, and the lower end face of the flange 2 is fixedly connected to one end of a spring 3. The spring 3 is disposed in the top pipe 4, and the other end of the spring 3 is fixedly connected to a filter plate assembly 5, which is also disposed in the top pipe 4. The lower end cap 10 is fixedly connected to an inlet pipe 11. A pressure boosting grid 13 is installed in the cylindrical body 7. The device includes a fixed plate 1301, which is circumferentially fixed to the inner wall of the cylinder 7. The center of the fixed plate 1301 is fixedly connected to the outer ring of a bearing 1302, and the inner ring of the bearing 1302 is fixedly connected to a rotating rod 1303. The upper end of the rotating rod 1303 is fixedly connected to a rotating plate 1304. The fixed plate 1301 has several connecting holes 130102, and the rotating plate 1304 has several connecting holes 130402. The distance between two adjacent connecting holes 130102 is greater than the diameter of the connecting hole 130402. This invention provides an embodiment, see reference. Figure 11 The fixing plate 1301 includes a plate body 130101, on which four connecting holes 130102 are provided. Each connecting hole 130102 is equidistant from the center of the plate body 130101, and the angle between any two adjacent connecting holes 130102 is 90°. A center hole 130104 is provided at the center of the plate body 130101, and the center hole 130104 is fixedly connected to the outer ring of the bearing 1302. A connecting hole 130103 is correspondingly provided between each connecting hole 130102 and the center of the plate body 130101. The centers of each connecting hole 130102, each connecting hole 130103, and the center of the plate body 130101 are on a straight line.

[0051] This utility model provides an embodiment, with reference to... Figure 12 The rotating plate 1304 includes a plate body 130401, on which four connecting holes 130402 are provided. The distance from each connecting hole 130402 to the center of the plate body 130401 is equal, and the angle between two adjacent connecting holes 130402 is 90°. A center hole 130404 is provided at the center of the plate body 130401, and the center hole 130404 is fixedly connected to the rotating plate 1304. A connecting hole 130403 is provided between each connecting hole 130402 and the center of the plate body 130401. The center of each connecting hole 130402, the center of each connecting hole 130403, and the center of the plate body 130401 are on a straight line. The distance between two adjacent connecting holes 130103 on the plate body 3 130101 of the fixed plate 1301 is greater than the diameter of the connecting hole 130403 on the rotating plate 1304.

[0052] This utility model provides an embodiment, with reference to... Figure 10 The bottom of the rotating rod 1303 is fixed with a rotating handle 1305, and the lower end cap 10 is provided with a fixed position indicator. The indicator can display how many angles the rotating handle 1305 and the rotating plate 1304 have rotated.

[0053] This utility model provides an embodiment, with reference to... Figure 1 The flange 2 is fixedly connected to the top cover 1 by bolts, and the top cover 1 is provided with an air outlet pipe.

[0054] This utility model provides an embodiment, with reference to... Figure 2 The filter plate assembly 5 includes a pressure plate 504, which is fixed together with a fixing ring 502 by a fixing bolt 501. A filter screen 503 is provided between the pressure plate 504 and the fixing ring 502.

[0055] This utility model provides an embodiment, with reference to... Figure 3-5 The pressure plate 504 includes a plate body 50501. A circular fixing groove 50502 is provided on one end face of the plate body 50501. A through hole 50503 is provided on the plate body 50501. A connecting hole 50504 is provided at the center of the end face of the plate body 50501 where the fixing groove 50502 is provided. A plurality of connecting holes 50505 are provided on the other end face of the plate body 50501. The connecting holes are threaded holes and are connected to the fixing bolt 501 by threads. The connecting holes 50504 are threaded holes and are connected to the lifting ring 505 by threads.

[0056] This utility model provides an embodiment, with reference to... Figure 6 A filter plate assembly 2 8 is fixed on the cylinder 7. The filter plate assembly 2 includes a fastening plate 2 801, a fastening plate 3 803, and a fixing ring 2 804. The fastening plate 2 801, the fastening plate 3 803, and the fixing ring 2 804 are connected by a fixing bolt 2 805. The fixing bolt 2 805 passes through the fastening plate 2 801, the fastening plate 3 803, and the fixing ring 2 804 in sequence. A nut 806 is installed on the fixing bolt 2 805. The fixing bolt 2 805 and the nut 806 make the fastening plate 2 801, the fastening plate 3 803, and the fixing ring 2 804 tightly pressed together. A filter screen 2 802 is provided between the fastening plate 2 801 and the fastening plate 3 803.

[0057] This utility model provides an embodiment, with reference to... Figure 7 The second fastening plate 801 includes a plate body 80101, and the plate body 80101 is provided with a plurality of connecting holes 80102. The shape and structure of the third fastening plate 803 are completely identical to those of the second fastening plate 801.

[0058] This utility model provides an embodiment, with reference to... Figure 1 A flow divider 9 is fixed inside the lower end cap 10. The flow divider 9 includes a cover plate 901, the end face of which is fixedly connected to a short pipe 902. Several short plates 903 are fixed to the outer wall of the short pipe 902, and the ends of the short plates 903 are fixedly connected to the inner wall of the lower end cap 10. Several supports 12 are fixed to the lower end of the lower end cap 10.

[0059] PSA adsorption towers achieve adsorption and desorption processes by controlling pressure fluctuations. When the pressure is increased, the adsorbent first adsorbs the strongly adsorbed components in the gas mixture under high pressure. Once adsorption saturation occurs, the adsorption tower enters a regeneration process, desorbing the adsorbate from the adsorption bed by reducing the pressure, while the unadsorbed components are discharged through the adsorption layer. Because different gases have different adsorption and desorption characteristics, separation can be achieved through periodic pressure changes.

[0060] Compressed air from the air compressor first enters a refrigerated dryer to remove moisture, and then enters two PSA adsorption towers. The special carbon molecular sieve adsorbents packed in the PSA adsorption towers selectively adsorb impurity gas components such as O2 and CO2, while the product gas N2 will be discharged from the top of the tower with 99% purity. During pressurization, rotating the rotating handle 1305 causes the rotating rod 1303 to rotate axially within the bearing 1302. The rotating rod 1303 then rotates the rotating plate 1304. By rotating the rotating handle 1305 and the indicator on the indicator panel, the connecting hole 130402 on the rotating plate 1304 rotates to the plate 130101 between the two connecting holes 130102, and the connecting hole 130403 rotates to the plate 130101 between the two connecting holes 130103. The plate 130101 completely blocks the connecting holes 130402 and 130403, making the adsorption tower below the pressurization grid 13 a closed structure, which facilitates pressurization within the tower.

[0061] During depressurization, the oxygen adsorbed by the adsorbent is desorbed and discharged counter-currently through the bottom of the PSA adsorption tower. After rinsing, the adsorbent is regenerated. After regeneration, the adsorbent is pressurized and then the product is pressurized before being put back into adsorption. The two PSA adsorption towers are used alternately to achieve continuous separation of air for nitrogen production. During depressurization, by rotating the rotary handle 1305 and the indicator on the indicator panel, the connecting hole 130402 on the rotating plate 1304 is rotated to completely overlap with the connecting hole 130102, and the connecting hole 130403 is completely overlapped with the connecting hole 130103. This ensures that the connecting holes 130402 and 130102, and 130403 and 130103 are fully connected, increasing the gas passage and facilitating depressurization within the tower.

[0062] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A PSA adsorption column characterized by: The application relates to a cylinder body, wherein a booster grid is arranged in the cylinder body, the booster grid comprises a fixed plate which is fixedly connected with the inner wall of the cylinder body in a circumferential direction, the center of the fixed plate is fixedly connected with the outer ring of a bearing, the inner ring of the bearing is fixedly connected with a rotating rod, the upper end of the rotating rod is fixedly connected with a rotating plate, the center axes of the cylinder body, the fixed plate, the rotating plate and the rotating rod are coincident, a plurality of communication holes three are arranged on the fixed plate, a plurality of communication holes five are arranged on the rotating plate, the distance between two adjacent communication holes three is greater than the diameter of the communication hole five, and the diameter of the communication hole five is not greater than the diameter of the communication hole three.

2. The PSA adsorption column of claim 1, wherein: The fixed plate comprises a plate body three, four communication holes three are arranged on the plate body three, the distance from each communication hole three to the center of the plate body three is equal, the angle between two adjacent communication holes three is 90 DEG, and the center of the plate body three is provided with a center hole one which is fixedly connected with the outer ring of the bearing.

3. The PSA adsorption column of claim 2, wherein: Four communication holes four are further arranged on the plate body three, each communication hole four is arranged between each communication hole three and the center of the plate body three, and the center of each communication hole three, the center of each communication hole four and the center of the plate body three are on a straight line.

4. The PSA adsorption column of claim 3, wherein: The rotating plate comprises a plate body four, four communication holes five are arranged on the plate body four, the distance from each communication hole five to the center of the plate body four is equal, the angle between two adjacent communication holes five is 90 DEG, and the center of the plate body four is provided with a center hole two which is fixedly connected with the rotating plate.

5. The PSA adsorption column of claim 4, wherein: Four communication holes six are further arranged on the plate body four, each communication hole six is arranged between each communication hole five and the center of the plate body four, and the center of each communication hole five, the center of each communication hole six and the center of the plate body four are on a straight line.

6. The PSA adsorption column of claim 5, wherein: The distance between two adjacent communication holes four on the plate body three of the fixed plate is greater than the diameter of the communication hole six on the rotating plate, and the diameter of the communication hole six is not greater than the diameter of the communication hole four.

7. The PSA adsorption column of claim 1, wherein: The upper end of the cylinder body is fixedly connected with an upper end cover, the lower end of the cylinder body is fixedly connected with a lower end cover, the upper end cover is fixedly connected with a top pipe, the upper end of the top pipe is fixedly connected with a flange plate, the lower end surface of the flange plate is fixedly connected with one end of a spring, the spring is arranged in the top pipe, the other end of the spring is fixedly connected with a filter plate assembly one, the filter plate assembly one is also arranged in the top pipe, and the lower end cover is fixedly connected with an air inlet pipe.

8. The PSA adsorption column of claim 7, wherein: The lower part of the lower end cover is provided with a position-fixed indicating disc.

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