Biogas purification equipment

Abstract

The invention discloses biogas purification equipment, and relates to the technical field of biogas purification, the biogas purification equipment comprises an absorption tank, a regeneration tank and a settling tank which are fixedly mounted on a mounting seat, a gas inlet pipe and an exhaust pipe are fixedly mounted on the absorption tank, and a spray pipe and an extraction pipe are communicated between the absorption tank and the regeneration tank; a spray head is fixedly installed at the end, located in the absorption tank, of the spray pipe, a fixed pipe is fixedly installed in the absorption tank, the inner diameter of the fixed pipe is larger than that of the spray head, a plurality of fan-shaped plates are fixedly installed in the fixed pipe in sequence from top to bottom, and a mounting frame is further fixedly installed at the bottom of the fixed pipe; and a rotating shaft is rotationally mounted on the mounting frame. The device has the advantages that the quantitative desulfurization solution pumped into the absorption tank is expanded into a water film form and is mixed with the quantitative biogas input into the absorption tank, so that the mixing uniformity of the desulfurization solution and the biogas and the maximum desulfurization effect can be ensured, and the problem of high loss of the desulfurization solution is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of biogas purification and refining, and in particular to biogas purification and refining equipment. Background Art

[0002] Biogas is a combustible gas produced by the fermentation of organic matter by microorganisms under anaerobic conditions. Its main component is methane, and it contains a certain amount of carbon dioxide and gas impurities such as hydrogen sulfide. Hydrogen sulfide is a corrosive and toxic gas that has a strong corrosive effect on equipment and also produces a foul odor. Therefore, before the biogas is put into use, it must be purified and treated with purification equipment.

[0003] After searching, a patent document with publication number CN215365631U discloses a high-efficiency biogas purification tower, including an outer shell, a raw gas inlet is provided on the left side of the outer shell near the bottom, a high-purity biogas outlet is provided on the right side of the outer shell near the bottom, an inner shell is welded inside the outer shell, a first filter layer, a second filter layer, and a third filter layer are welded inside the inner shell, and pipes are symmetrically fixedly installed on the outer wall of the inner shell.

[0004] The above-mentioned high-efficiency biogas purification tower realizes effective purification of biogas through the combination of multiple filter layers and different fillers, but still has the following shortcomings: Although the setting of multiple filter layers and multiple fillers can improve the purification effect of biogas to a certain extent, the desulfurization solvent keeps flowing all the time, and the uniformity of its mixing with biogas cannot be guaranteed. The desulfurization effect is not ideal. The continuous flow of the desulfurization solvent will not only increase the loss, but also cause limited contact time with biogas, which will also have an adverse effect on the desulfurization effect. Therefore, it is necessary to design a biogas purification equipment. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a biogas purification and refining device, which solves the problems raised in the above background technology.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A biogas purification and refining device comprises an absorption tank, a regeneration tank and a sedimentation tank fixedly mounted on a mounting seat, an air intake pipe and an exhaust pipe fixedly mounted on the absorption tank, and a spray pipe and an extraction pipe are connected between the absorption tank and the regeneration tank; A nozzle is fixedly installed at one end of the spray pipe located in the absorption tank, a fixed pipe is fixedly installed in the absorption tank, and the inner diameter of the fixed pipe is larger than the nozzle, a plurality of groups of fan-shaped plates are fixedly installed in the fixed pipe from top to bottom, a mounting frame is also fixedly installed at the bottom of the fixed pipe, and a rotating shaft is rotatably installed on the mounting frame, a plurality of groups of sealing plates are fixedly installed in sequence from top to bottom on the rotating shaft, and each group of sealing plates is matched with a corresponding group of fan-shaped plates, and each group of sealing plates can control the opening and closing of the gap of the corresponding group of fan-shaped plates; A quantitative spray component is installed in the nozzle, and a rotating component is installed between the quantitative spray component and the rotating shaft. An opening and closing component matched with the air intake pipe is installed at the bottom of the rotating shaft, and the opening and closing component is used to control the opening and closing of the air intake pipe.

[0007] Furthermore, the quantitative spray assembly is composed of a spray hole, a sliding column, a liquid outlet, a support frame, a sealing column and a constant pressure mechanism. The spray hole is opened on the nozzle, the sliding column is sealingly and slidingly installed in the sliding column, the liquid outlet is opened on the sliding column, the support frame is fixedly installed in the nozzle, the sealing column is fixedly installed at the bottom of the support frame, and the sealing column is sealingly and slidingly connected to the liquid outlet.

[0008] Furthermore, the constant pressure mechanism is composed of a fixed ring and multiple springs. The fixed ring is fixedly mounted on the side wall of the sliding column, and the fixed ring is sealingly and slidingly connected to the inner wall of the nozzle. The diameter of the fixed ring is larger than the diameter of the spray hole, and the multiple springs are installed between the bottom of the fixed ring and the inner wall of the nozzle.

[0009] Furthermore, the rotating assembly consists of a fixed rod, a protrusion and a spiral groove, the fixed rod is fixedly installed on the top of the rotating shaft, the protrusion is fixedly installed on the side wall of the fixed rod, the spiral groove is opened on the side wall of the liquid outlet, and the spiral groove cooperates with the protrusion.

[0010] Furthermore, the opening and closing assembly consists of a fixed shaft and a partition. The fixed shaft is fixedly installed at the bottom of the rotating shaft, and the fixed shaft is sealed and rotatably connected to the part of the intake pipe located in the absorption tank. The partition is fixedly installed on one end of the fixed shaft located in the intake pipe.

[0011] Furthermore, a plurality of annular grooves are sequentially opened on the inner wall of the fixed tube from top to bottom, and each annular groove is respectively located above a corresponding group of fan-shaped plates, a through hole is opened between every two adjacent annular grooves, and every two adjacent through holes are symmetrically arranged.

[0012] Furthermore, the included angle of the sealing plate is greater than or equal to the included angle of the adjacent sector plates, and the included angle of the two ends of the spiral groove on the horizontal plane is greater than or equal to the included angle of the sealing plate.

[0013] Furthermore, a pressure relief pipe is fixedly installed on the top of the regeneration tank, a discharge pipe is fixedly installed on the bottom of the sedimentation tank, and a delivery pipe and a reflux pipe are connected between the sedimentation tank and the regeneration tank.

[0014] Compared with the prior art, the present invention has the following advantages: 1: Through the cooperation of multiple sets of fan-shaped plates and multiple sets of sealing plates, the desulfurization solution pumped into the absorption tank can be expanded into multiple layers of water film, and then the biogas can pass through the water film before being discharged from the top of the absorption tank. The existence of the water film makes the mixing effect of biogas and desulfurization solution better, which can effectively improve the desulfurization effect.

[0015] 2: Through the design of multiple annular grooves and multiple through holes, the desulfurization solution pumped into the absorption tank can maintain the same volume between each layer of the sector plate and the sealing plate, thereby ensuring that the subsequently formed water film is complete and consistent, thereby ensuring the subsequent desulfurization effect on the biogas.

[0016] 3: Through the coordination of the quantitative spraying component, the rotating component and the opening and closing component, the content of the desulfurization solution pumped into the absorption tank and the content of the biogas entering the absorption tank are always kept in the same ratio each time, thereby ensuring the desulfurization effect of the desulfurization solution on the biogas to the greatest extent, and there will be no problem of large loss of desulfurization solution.

[0017] In summary, the present invention expands the quantitative desulfurization solution pumped into the absorption tank into the form of a water film and mixes it with the quantitative biogas input into the absorption tank, which can ensure the mixing uniformity of the desulfurization solution and biogas and the maximum desulfurization effect, and will not cause the problem of large loss of desulfurization solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a biogas purification and refining device proposed by the present invention; Figure 2 for Figure 1 A top view of Figure 3 for Figure 2 Schematic diagram of the structure of the AA surface in the middle; Figure 4 for Figure 3 Schematic diagram of the three-dimensional structure; Figure 5 for Figure 1 An enlarged schematic diagram of the internal structure of the middle absorption tank; Figure 6 for Figure 5 Schematic diagram of the structure without the fixed axis; Figure 7 for Figure 5 Schematic diagram of the structure at the middle fixed axis; Figure 8 for Figure 5Schematic diagram of the structure after the fixed tube is removed and the fixed shaft is rotated by a certain angle; Fig. 9 for Figure 6 An enlarged exploded diagram of the structure at the middle nozzle; Fig.10 for Figure 6 A top view of the fixed pipe; Fig.11 for Fig.10 Schematic diagram of the structure of the middle BB surface; Fig.12 for Fig.11 Schematic diagram of the three-dimensional structure.

[0019] In the figure: 1. mounting seat; 2. absorption tank; 3. regeneration tank; 4. sedimentation tank; 5. air inlet pipe; 6. exhaust pipe; 7. spray pipe; 8. extraction pipe; 9. delivery pipe; 10. return pipe; 11. discharge pipe; 12. pressure relief pipe; 13. nozzle; 14. spray hole; 15. fixed pipe; 16. fan plate; 17. mounting frame; 18. rotating shaft; 19. sealing plate; 20. sliding column; 21. liquid outlet; 22. supporting frame; 23. sealing column; 24. fixing ring; 25. spring; 26. fixing rod; 27. bump; 28. annular groove; 29. ​​through hole; 30. fixed shaft; 31. partition. DETAILED DESCRIPTION

[0020] Reference Figure 1-Figure 12 , a biogas purification and refining device, comprising an absorption tank 2, a regeneration tank 3 and a settling tank 4 fixedly mounted on a mounting base 1, an air intake pipe 5 and an exhaust pipe 6 fixedly mounted on the absorption tank 2, the absorption tank 2 is used to absorb and remove hydrogen sulfide in the biogas, the desulfurization solvent adopts an alkaline bicarbonate solution, which can react with the hydrogen sulfide in the biogas to produce and absorb the sulfur component therein to form sulfide, the regeneration tank 3 is filled with a desulfurization bacteria solution that can perform biological regeneration treatment on the desulfurization solvent, the desulfurization solution that absorbs sulfur elements is decomposed by sulfur bacteria in the regeneration tank 3 to convert sulfide into hydrophilic elemental sulfur, which will not cause system blockage, and the desulfurization solution has been regenerated at this time; The air inlet pipe 5 is used to input the biogas to be purified into the absorption tank 2, and the exhaust pipe 6 is used to discharge the purified biogas to the outside of the absorption tank 2. The absorption tank 2 and the regeneration tank 3 are fixedly connected with a spray pipe 7 and an extraction pipe 8. The spray pipe 7 is used to input the regenerated desulfurization solution into the absorption tank 2. The end of the spray pipe 7 connected to the regeneration tank 3 is located below the liquid level of the solution in the regeneration tank 3. The extraction pipe 8 is used to input the desulfurization solution containing sulfide after the reaction with the biogas into the regeneration tank 3 for regeneration treatment. The spray pipe 7 and the extraction pipe 8 are both equipped with corresponding pump bodies, which are respectively used for conveying the desulfurization solution and extracting the desulfurization solution containing sulfide. A nozzle 13 is fixedly installed at one end of the spray pipe 7 located in the absorption tank 2, and the nozzle 13 can limit the spraying range of the sprayed desulfurization solution. A pressure relief pipe 12 is fixedly installed on the top of the regeneration tank 3. The pressure relief pipe 12 can discharge oxygen and part of carbon dioxide and other gases generated during the regeneration process from the regeneration tank 3 to prevent them from re-entering the absorption tank 2 and causing adverse effects on the essence effect. A delivery pipe 9 and a reflux pipe 10 are connected between the sedimentation tank 4 and the regeneration tank 3. The solution regenerated in the regeneration tank 3 is pumped into the sedimentation tank 4 from the bottom of the regeneration tank 3 through the delivery pipe 9. After a certain period of sedimentation, the solution without sulfur element at the upper end re-enters the regeneration tank 3 through the reflux pipe 10 for continued utilization. A discharge pipe 11 is fixedly installed at the bottom of the sedimentation tank 4, and the settled biological sulfur is discharged in the form of sulfur sludge through the discharge pipe 11 at the bottom of the sedimentation tank 4. This part of biological sulfur can be used as a highly infectious liquid suspended fungicide or fertilizer.

[0021] A fixed pipe 15 is fixedly installed in the absorption tank 2, and the inner diameter of the fixed pipe 15 is larger than the nozzle 13. A plurality of groups of sector plates 16 are fixedly installed in the fixed pipe 15 from top to bottom, and each group of sector plates 16 is evenly distributed with the center of the fixed pipe 15 as the midpoint. A mounting frame 17 is also fixedly installed at the bottom of the fixed pipe 15, and a rotating shaft 18 is rotatably installed on the mounting frame 17. A plurality of groups of sealing plates 19 are fixedly installed in sequence from top to bottom, and each group of multiple sealing plates 19 is fixedly installed. 9 is also evenly distributed with the center of the fixed tube 15 as the midpoint, and each group of sealing plates 19 is matched with a corresponding group of fan-shaped plates 16, each group of sealing plates 19 can control the opening and closing of the gap of the corresponding group of fan-shaped plates 16. When the sealing plates 19 are located at the gap of the fan-shaped plates 16, the gap of the fan-shaped plates 16 can be sealed. At this time, the upper and lower ends of the fixed tube 15 are in a disconnected state. On the contrary, when the sealing plates 19 overlap with the fan-shaped plates 16, the upper and lower ends of the fixed tube 15 are in a connected state.

[0022] A quantitative spray assembly is installed in the nozzle 13, and the quantitative spray assembly consists of a spray hole 14, a sliding column 20, a liquid outlet 21, a support frame 22, a sealing column 23 and a constant pressure mechanism. The spray hole 14 is opened on the nozzle 13, and the sliding column 20 is sealed and slidably installed in the sliding column 20. The liquid outlet 21 is opened on the sliding column 20, and the support frame 22 is fixedly installed in the nozzle 13. The sealing column 23 is fixedly installed at the bottom of the support frame 22, and the sealing column 23 is sealed and slidably connected with the liquid outlet 21. The constant pressure mechanism consists of a fixing ring 24 and a plurality of springs 25. The fixing ring 24 is fixedly installed on the side wall of the sliding column 20, and the fixing ring 24 is connected to the inner wall of the nozzle 13. Sealed sliding connection, the diameter of the fixed ring 24 is larger than the diameter of the spray hole 14, and multiple springs 25 are installed between the bottom of the fixed ring 24 and the inner wall of the nozzle 13. When the desulfurization solution is not pumped into the absorption tank 2, the elastic force of the multiple springs 25 makes the fixed ring 24 drive the sliding column 20 to be located at the upper end of the spray hole 14. At this time, the liquid outlet 21 is sealed and connected with the sealing column 23, and no desulfurization solution will flow out. On the contrary, when the desulfurization solution is started to be pumped in, the increase in liquid pressure will make the fixed ring 24 overcome the elastic force of the spring 25 to move the sliding column 20 downward. When the sealing column 23 is separated from the liquid outlet 21, the desulfurization solution can be discharged downward smoothly.

[0023] A rotating assembly is installed between the quantitative spray assembly and the rotating shaft 18. The rotating assembly consists of a fixed rod 26, a protrusion 27 and a spiral groove. The fixed rod 26 is fixedly installed on the top of the rotating shaft 18, and the protrusion 27 is fixedly installed on the side wall of the fixed rod 26. The spiral groove is arranged on the side wall of the liquid outlet 21, and the spiral groove cooperates with the protrusion 27. When the desulfurization solution is not pumped in, the sealing plate 19 and the fan plate 16 are in an overlapping state. When the desulfurization solution starts to be pumped in, the downward movement of the sliding column 20 will drive the rotating shaft 18 to rotate through the cooperation of the spiral groove and the protrusion 27 thereon, until the sealing plate 19 and the fan plate 16 are staggered to seal the gap of the fan plate 16 (such as Figure 8 As shown), at this time, the desulfurization solution flows out from the nozzle 13 and falls between a group of fan-shaped plates 16 and a sealing plate 19 on the uppermost layer; A plurality of annular grooves 28 are sequentially provided on the inner wall of the fixed tube 15 from top to bottom, and each annular groove 28 is respectively located above a corresponding group of sector plates 16, and a through hole 29 is provided between each two adjacent annular grooves 28, and each two adjacent through holes 29 are symmetrically arranged. When the accumulated liquid level of the desulfurization solution between the uppermost group of sector plates 16 and the sealing plate 19 reaches the same level as the corresponding annular groove 28, the excess desulfurization solution will enter the annular groove 28 and flow from the corresponding through hole 29 to the next annular groove 28, and with the continuous flow, the accumulated liquid level of the desulfurization solution between the uppermost group of sector plates 16 and the sealing plate 19 will reach the same level as the corresponding annular groove 28. The desulfurization solution is filled between the sealing plates 19. The above operation is repeated during the desulfurization solution pumping process until a sufficient amount of desulfurization solution is filled between each layer of the fan-shaped plate 16 and the sealing plate 19. At this time, the pumping operation of the desulfurization solution stops, and the fixing ring 24 moves up and resets under the elastic force of the spring 25. The cooperation of the protrusion 27 and the spiral groove allows the rotating shaft 18 to rotate so that each group of sealing plates 19 rotates and resets to overlap with multiple groups of fan-shaped plates 16. In this process, the movement of the sealing plate 19 is used to expand the desulfurization solution to form a water film between the fan-shaped plates 16. When the biogas passes through the water film, the hydrogen sulfide in it can be effectively mixed with the desulfurization solution to ensure the desulfurization effect. The angle of the sealing plate 19 is greater than or equal to the angle of the adjacent fan-shaped plates 16. The advantage of the angle design here is to ensure the sealing effect of the sealing plate 19 on the gap between the adjacent fan-shaped plates 16. The angle between the two ends of the spiral groove on the horizontal plane is greater than or equal to the angle of the sealing plate 19. The advantage of the angle design here is to ensure that the rotation of the rotating shaft 18 during the pumping process of the desulfurization solvent can meet the complete sealing and full opening of the gap between each group of fan-shaped plates 16.

[0024] An opening and closing assembly that matches the air inlet pipe 5 is installed at the bottom of the rotating shaft 18. The opening and closing assembly is used to control the opening and closing of the air inlet pipe 5. The opening and closing assembly consists of a fixed shaft 30 and a partition 31. The fixed shaft 30 is fixedly installed at the bottom of the rotating shaft 18, and the fixed shaft 30 is sealed and rotatably connected with the part of the air inlet pipe 5 located in the absorption tank 2. The partition 31 is fixedly installed on one end of the fixed shaft 30 located in the air inlet pipe 5. When the desulfurization solution is not pumped in, the partition 31 is in a perpendicular state to the air inlet direction in the air inlet pipe 5. At this time, no biogas enters the absorption tank 2. When the desulfurization solution is pumped in, the rotation of the rotating shaft 18 drives the partition 31 to enter the air inlet pipe 5. The air inlet pipe 5 is rotated, and the outlet of the air inlet pipe 5 is opened, and part of the biogas enters the absorption tank 2. However, the sealing plate 19 and the fan-shaped plate 16 are in a sealed state at this time, so the biogas will not pass directly upward from the fixed pipe 15. After the desulfurization solution is pumped in, the resetting rotation of the rotating shaft 18 makes the sealing plate 19 overlap with the fan-shaped plate 16, and the partition 31 seals the air inlet pipe 5 again. At this time, the biogas that has entered the absorption tank 2 can pass through the water film between the multiple groups of fan-shaped plates 16 to achieve effective desulfurization. This desulfurization method realizes the quantitative mixed desulfurization treatment of biogas and desulfurization solution, with better desulfurization effect and no problem of large loss of desulfurization solution.

[0025] In order to improve the effect of water film formation, the number of each layer of fan-shaped plates 16 and each layer of sealing plates 19 is also set to be multiple. When the number is set to be large, the rotation angle of the rotating shaft 18 each time is small. At this time, if it is to be ensured that the partition 31 can rotate a sufficient angle in the intake pipe 5 to open the intake pipe 5, a differential mechanism can be set between the fixed shaft 30 and the rotating shaft 18, and at this time the fixed shaft 30 and the rotating shaft 18 are not coaxially set. The differential mechanism can specifically be composed of gear one and gear two, gear one is fixed at the bottom of the rotating shaft 18, gear two is fixed at the top of the fixed shaft 30, and gear two is meshed with gear one, wherein the diameter and the number of teeth of gear one are greater than the diameter and the number of teeth of gear two, and the tooth spacing of gear one and gear two is equal. Through this design, the fixed shaft 30 can be rotated by a sufficient angle when the rotating shaft 18 rotates a small amplitude, ensuring that the partition 31 can control the switch of the intake pipe 5 when the fixed shaft 30 rotates.

[0026] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A biogas purification and refining device, comprising an absorption tank (2), a regeneration tank (3) and a sedimentation tank (4) fixedly mounted on a mounting base (1), characterized in that: An air intake pipe (5) and an exhaust pipe (6) are fixedly mounted on the absorption tank (2); a spray pipe (7) and an extraction pipe (8) are connected between the absorption tank (2) and the regeneration tank (3); A nozzle (13) is fixedly mounted on one end of the spray pipe (7) located in the absorption tank (2); a fixed pipe (15) is fixedly mounted in the absorption tank (2); and the inner diameter of the fixed pipe (15) is larger than that of the nozzle (13); a plurality of groups of fan-shaped plates (16) are fixedly mounted in sequence from top to bottom in the fixed pipe (15); a mounting frame (17) is fixedly mounted on the bottom of the fixed pipe (15); and a rotating shaft (18) is rotatably mounted on the mounting frame (17); a plurality of groups of sealing plates (19) are fixedly mounted in sequence from top to bottom in the rotating shaft (18); and each group of sealing plates (19) is matched with a corresponding group of fan-shaped plates (16); and each group of sealing plates (19) can control the opening and closing of the gap of the corresponding group of fan-shaped plates (16); A quantitative spray assembly is installed in the spray head (13), and a rotating assembly is installed between the quantitative spray assembly and the rotating shaft (18). An opening and closing assembly that matches the air intake pipe (5) is installed at the bottom of the rotating shaft (18), and the opening and closing assembly is used to control the opening and closing of the air intake pipe (5).

2. A biogas purification and refining equipment according to claim 1, characterized in that: The quantitative spray assembly comprises a spray hole (14), a sliding column (20), a liquid outlet hole (21), a support frame (22), a sealing column (23) and a constant pressure mechanism; the spray hole (14) is provided on the spray head (13); the sliding column (20) is sealingly and slidably mounted inside the sliding column (20); the liquid outlet hole (21) is provided on the sliding column (20); the support frame (22) is fixedly mounted inside the spray head (13); the sealing column (23) is fixedly mounted on the bottom of the support frame (22); and the sealing column (23) is sealingly and slidably connected to the liquid outlet hole (21).

3. A biogas purification and refining equipment according to claim 2, characterized in that: The constant pressure mechanism is composed of a fixing ring (24) and a plurality of springs (25); the fixing ring (24) is fixedly mounted on the side wall of the sliding column (20), and the fixing ring (24) is sealingly slidably connected to the inner wall of the nozzle (13); the diameter of the fixing ring (24) is greater than the diameter of the nozzle hole (14), and the plurality of springs (25) are mounted between the bottom of the fixing ring (24) and the inner wall of the nozzle (13).

4. The biogas purification equipment according to claim 2, characterized in that: The rotating assembly is composed of a fixed rod (26), a protrusion (27) and a spiral groove. The fixed rod (26) is fixedly mounted on the top of the rotating shaft (18). The protrusion (27) is fixedly mounted on the side wall of the fixed rod (26). The spiral groove is formed on the side wall of the liquid outlet hole (21), and the spiral groove cooperates with the protrusion (27).

5. The biogas purification equipment according to claim 1, characterized in that: The opening and closing assembly is composed of a fixed shaft (30) and a partition (31); the fixed shaft (30) is fixedly mounted on the bottom of the rotating shaft (18), and the fixed shaft (30) is sealingly rotatably connected to a portion of the air intake pipe (5) located inside the absorption tank (2); and the partition (31) is fixedly mounted on one end of the fixed shaft (30) located inside the air intake pipe (5).

6. The biogas purification equipment according to claim 1, characterized in that: A plurality of annular grooves (28) are sequentially formed on the inner wall of the fixed tube (15) from top to bottom, and each annular groove (28) is located above a corresponding group of sector plates (16). A through hole (29) is formed between every two vertically adjacent annular grooves (28), and every two vertically adjacent through holes (29) are symmetrically arranged.

7. The biogas purification equipment according to claim 4, characterized in that: The included angle of the sealing plate (19) is greater than or equal to the included angle of the adjacent sector plate (16), and the included angle of the two ends of the spiral groove on the horizontal plane is greater than or equal to the included angle of the sealing plate (19).

8. The biogas purification equipment according to claim 1, characterized in that: A pressure relief pipe (12) is fixedly installed on the top of the regeneration tank (3), a discharge pipe (11) is fixedly installed on the bottom of the sedimentation tank (4), and a delivery pipe (9) and a return pipe (10) are connected between the sedimentation tank (4) and the regeneration tank (3).

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