Biogas decarbonization and purification adsorption tower convenient to disassemble, assemble and maintain

Abstract

The utility model discloses a methane decarbonization and purification adsorption tower convenient to disassemble, assemble and maintain, and belongs to the technical field of methane treatment equipment. The biogas decarbonization and purification adsorption tower convenient to disassemble, assemble and maintain comprises a gas inlet assembly, a gas exhaust assembly, an adsorption tower body and a connecting assembly, the connecting assembly is used for disassembling and assembling a first tower body and a second tower body, the adsorption tower body comprises the first tower body, the second tower body is arranged at the bottom end of the first tower body, and the connecting assembly comprises a plurality of top seats; the bottom ends of the top seats are provided with the bases, the top seats are installed outside the first tower body, the bases are installed outside the second tower body, square insertion holes are formed in the bases, square sockets are arranged in the square insertion holes, and the upper ends of the square sockets are fixedly connected with the bottom ends of the top seats. First square connecting holes are formed in the two sides of the square socket, second square connecting holes are formed in the two sides of the base, and connecting rods are arranged between the first square connecting holes and the second square connecting holes in the same side.

Description

Technical Field

[0001] This utility model relates to the technical field of biogas treatment equipment, specifically a biogas decarbonization and purification adsorption tower that is easy to disassemble and maintain. Background Technology

[0002] Biogas is a mixed gas produced by the fermentation of organic matter under anaerobic conditions by microorganisms. Various organic materials, such as human and animal excrement, straw, and sewage, ferment in a closed biogas digester under anaerobic (oxygen-free) conditions, being decomposed and transformed by a wide variety of biogas-fermenting microorganisms to produce biogas. A biogas decarbonization and purification adsorption tower is a device used to remove impurities such as carbon dioxide from biogas, thereby increasing its methane content.

[0003] Chinese patent CN208748038U discloses a pressure swing adsorption (PSA) tower for effectively filtering solid impurities. It includes two vertically arranged adsorption tower bodies. The left adsorption tower body has an inlet pipe connected to its lower left side, and the right adsorption tower body has an exhaust pipe extending vertically upwards connected to its upper right side. The bottom ends of the two adsorption tower bodies are connected by a gas supply pipe. A sewage discharge pipe connected to the gas supply pipe is fixedly installed on the left side of the gas supply pipe. Impurity removal fans are fixedly installed on both sides of the adsorption tower bodies and above the inlet pipes. Impurity removal ducts connected to the interior of the adsorption tower bodies are fixedly installed at the bottom of each impurity removal fan. This PSA tower effectively filters solid impurities, providing convenient conditions for biogas purification by adsorbing impurities in biogas. It is also easy to operate, effectively ensuring biogas combustion efficiency and higher resource utilization.

[0004] In actual use, the technical solution described in this plan has an integrated design for the adsorption tower, which cannot be disassembled into sections, making it inconvenient to maintain the internal filtration and adsorption devices. Utility Model Content

[0005] The purpose of this invention is to provide a biogas decarbonization and purification adsorption tower that is easy to disassemble and maintain, so as to solve the problems mentioned in the background art.

[0006] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0007] A biogas decarbonization and purification adsorption tower that is easy to disassemble and maintain includes an inlet assembly, an exhaust assembly, an adsorption tower body, and a connecting assembly. The inlet assembly is located at the upper end of the adsorption tower body, the exhaust assembly is located at the bottom end of the adsorption tower body, and the connecting assembly is located outside the adsorption tower body. The inlet assembly is used for biogas intake, the exhaust assembly is used for the exhaust of decarbonized biogas, the adsorption tower body is used for decarbonizing biogas, and the connecting assembly is used for disassembling and assembling a first tower body and a second tower body. The adsorption tower body includes a first tower body, and a second tower body is located at the bottom end of the first tower body. The connecting assembly includes several top seats, each with a base at its bottom. The top seats are respectively installed on the outside of a first tower body, and the bases are respectively installed on the outside of a second tower body. Each base has a square insertion hole inside, and each square insertion hole has a square socket inside. The upper end of the square socket is fixedly connected to the bottom end of the top seat. Each square socket has a first square connecting hole inside its two sides, and each base has a second square connecting hole inside its two sides. A connecting rod is provided between the first square connecting hole and the second square connecting hole on the same side.

[0008] Furthermore, the top seats are arranged in an equally spaced ring, and the base seats are arranged in an equally spaced ring.

[0009] The beneficial effect of adopting the above-mentioned further scheme is that there are four top seats and four base seats, and the four top seats and four base seats are aligned one by one. Since the four top seats and four base seats are distributed in a ring, the force on the connection between the first tower body and the second tower body is uniform, which improves the connection stability between the first tower body and the second tower body.

[0010] Furthermore, the second tower body has an annular groove inside at one end near the first tower body. A sealing ring is installed at the bottom of the annular groove. A hollow ring is provided inside the annular groove. One end of the hollow ring abuts against the sealing ring. The end of the hollow ring away from the sealing ring is fixedly connected to the bottom of the first tower body. The outer wall of the hollow ring is tightly fitted with the inner wall of the annular groove.

[0011] The beneficial effect of adopting the above-mentioned further solution is that, through the combined use of the annular groove, hollow ring and sealing ring, when the first tower body and the second tower body are aligned and installed, the hollow ring is embedded in the annular groove and abuts against the sealing ring. At the same time, the hollow ring is tightly fitted with the groove wall to form a double sealing structure, which prevents biogas leakage and enhances the sealing performance of the connection between the first tower body and the second tower body.

[0012] Furthermore, the opposite ends of the two connecting rods are wedge-shaped, and each of the opposite ends of the two connecting rods has a limiting groove. Each of the two limiting grooves is slidably connected to a limiting block. A wedge block is installed between a pair of limiting blocks, and the outer sides of the wedge block are respectively in contact with the wedge-shaped ends of the connecting rods.

[0013] The beneficial effect of adopting the above-mentioned further solution is that, since the opposite ends of the two connecting rods are wedge-shaped and the outer sides of the wedge blocks are respectively attached to the wedge-shaped ends of the connecting rods, when the wedge blocks move downward, they push the two connecting blocks to expand outward.

[0014] Furthermore, a screw is rotatably connected to the bottom of the square socket. One end of the screw extends through the wedge block to the outside and is threadedly connected to the wedge block. The wedge block has through holes on both sides of the screw. A smooth rod is provided inside each of the two through holes. The two ends of the two smooth rods are fixedly connected to the inner wall of the square socket. The upper end of the screw passes through the square socket and the top seat. A cross-shaped groove is provided inside the upper end of the screw.

[0015] The beneficial effect of adopting the above-mentioned further solution is that, since a cross-shaped groove is opened at the upper end of the screw, the head of a cross-shaped screwdriver is inserted into the cross-shaped groove, and then the cross-shaped screwdriver is rotated, causing the screw to rotate. This causes the wedge block connected to the external thread of the screw to move stably and linearly under the sliding limit action of the smooth rod. When the wedge block moves upward, under the action of the limit groove and the limit block, it drives a pair of connecting rods to retract into the square socket, so that the opposite ends of the pair of connecting rods are flush with the outer wall of the square socket. At this time, the top seat and the base can be separated, which facilitates the disassembly between the first tower body and the second tower body. When the wedge block moves downward, under the action of the limit groove and the limit block, it drives a pair of connecting rods to extend outward into the square socket, so that the opposite ends of the pair of connecting rods pass through the second square connecting hole and are flush with the outer wall of the base. At this time, the top seat and the base are connected, which facilitates the installation between the first tower body and the second tower body.

[0016] Furthermore, the inner wall of the second tower body is provided with a pair of sliding grooves, and a gas distribution plate is slidably connected between the pair of sliding grooves. The gas distribution plate is provided with a number of gas distribution holes inside, and the diameter of the gas distribution holes decreases from bottom to top. The interior of the first tower body is provided with zeolite molecular sieves. An exhaust hole is provided at the center of the upper end of the first tower body, and an air inlet hole is provided at the center of the bottom end of the second tower body.

[0017] The beneficial effects of adopting the above-mentioned further scheme are that the aperture of the gas distribution plate decreases from bottom to top, so that the biogas passes evenly through the zeolite molecular sieve from bottom to top under the action of the gas distribution plate, prolonging the contact time between the gas and the adsorbent and improving the carbon dioxide removal efficiency. At the same time, after the first tower body and the second tower body are separated, the gas distribution plate can be disassembled through the sliding groove, which is convenient for maintenance and cleaning.

[0018] Furthermore, the air intake assembly includes an air intake pipe disposed inside the air intake hole, with one end of the outer wall of the air intake pipe fixedly connected to the inner wall of the air intake hole, and a first flange connected to the end of the air intake pipe away from the air intake hole.

[0019] The beneficial effect of adopting the above-mentioned further solution is that the first flange connects the air inlet pipe to the external biogas pipeline, so that biogas can enter the interior of the adsorption tower body through the external biogas pipeline and the air inlet pipe. At the same time, by setting the first flange, it is convenient to disassemble and assemble the external biogas pipeline of the adsorption tower body.

[0020] Furthermore, the exhaust assembly includes an exhaust pipe disposed inside an exhaust port, with one end of the exhaust pipe's outer wall fixedly connected to the inner wall of the exhaust pipe, and a second flange connected to the end of the exhaust pipe furthest from the exhaust port.

[0021] The beneficial effect of adopting the above-mentioned further solution is that the second flange connects the exhaust pipe to the decarbonized biogas pipeline, so that the decarbonized biogas can be discharged from the inside of the adsorption tower body through the exhaust pipe and the decarbonized biogas pipeline. At the same time, by setting the second flange, it is convenient to disassemble and assemble the adsorption tower body and the decarbonized biogas pipeline.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows: This biogas decarbonization and purification adsorption tower, which is easy to disassemble and maintain, makes the adsorption tower body segmented by the cooperation of the first tower body and the second tower body. When maintenance is required, the first tower body and the second tower body can be separated to facilitate the removal of the gas distribution plate in the second tower body or the cleaning and maintenance of the zeolite molecular sieve in the first tower body. Since the upper end of the screw has a cross-shaped groove, the head of the cross screwdriver is inserted into the cross-shaped groove and then the cross screwdriver is rotated to make the screw rotate. The wedge block connected to the external thread of the screw moves stably and linearly under the sliding limit action of the smooth rod. When the wedge block moves upward, under the action of the limit groove and the limit block, it drives a pair of connecting rods to retract into the square socket, so that the opposite ends of the pair of connecting rods are flush with the outer wall of the square socket. At this time, the top seat and the base can be separated, which facilitates the disassembly of the first tower body and the second tower body. Attached Figure Description

[0023] Figure 1 A three-dimensional structural diagram of a biogas decarbonization and purification adsorption tower that is easy to disassemble and maintain, provided for this utility model;

[0024] Figure 2 An exploded three-dimensional structural diagram of the adsorption tower body of a biogas decarbonization and purification adsorption tower that is easy to disassemble and maintain, provided by this utility model.

[0025] Figure 3 This utility model provides a biogas decarbonization and purification adsorption tower that is easy to disassemble and maintain. Figure 2 Enlarged schematic diagram of structure A in the middle;

[0026] Figure 4An exploded three-dimensional structural diagram of the connection components of a biogas decarbonization and purification adsorption tower that is easy to disassemble and maintain, provided by this utility model.

[0027] Figure 5 This is a partial front cross-sectional view of the top and base of a biogas decarbonization and purification adsorption tower that is easy to disassemble and maintain, as provided by this utility model.

[0028] In the diagram: 1. Inlet assembly; 11. Inlet pipe; 12. First flange; 2. Exhaust assembly; 21. Exhaust pipe; 22. Second flange; 3. Adsorption tower body; 31. First tower body; 32. Second tower body; 33. Annular groove; 34. Hollow ring; 35. Sealing ring; 36. Slide groove; 37. Gas distribution plate; 4. Connecting assembly; 41. Top seat; 42. Base; 43. Square socket; 44. First square connecting hole; 45. Second square connecting hole; 46. Connecting rod; 47. Limiting groove; 48. Limiting block; 49. Wedge block; 410. Smooth rod; 411. Screw. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0030] Please see Figures 1-5This utility model provides a technical solution: a biogas decarbonization and purification adsorption tower that is easy to disassemble and maintain, including an inlet assembly 1, an exhaust assembly 2, an adsorption tower body 3, and a connecting assembly 4. The inlet assembly 1 is located at the upper end of the adsorption tower body 3, the exhaust assembly 2 is located at the bottom end of the adsorption tower body 3, and the connecting assembly 4 is located outside the adsorption tower body 3. The inlet assembly 1 is used for biogas to enter, the exhaust assembly 2 is used for the decarbonized biogas to exit, the adsorption tower body 3 is used for decarbonizing biogas, and the connecting assembly 4 is used for the first tower body 31 and the second tower body 31. The tower body 32 is disassembled and assembled. The connecting assembly 4 includes several top seats 41, each with a base 42 at its bottom. Each base 42 has a square insertion hole inside, and each square insertion hole has a square socket 43 inside. The upper end of the square socket 43 is fixedly connected to the bottom end of the top seat 41. The square socket 43 has a first square connecting hole 44 on both sides, and the base 42 has a second square connecting hole 45 on both sides. A connecting rod 4 is provided between the first square connecting hole 44 and the second square connecting hole 45 on the same side. 6. The adsorption tower body 3 includes a first tower body 31, and a second tower body 32 is provided at the bottom end of the first tower body 31. A plurality of top seats 41 are respectively installed on the outside of the first tower body 31, and a plurality of bases 42 are respectively installed on the outside of the second tower body 32. The top seats 41 are arranged in an equidistant ring, and the bases 42 are also arranged in an equidistant ring. Through the cooperation of the first tower body 31 and the second tower body 32, the adsorption tower body 3 is segmented. When maintenance is required, the first tower body 31 and the second tower body 32 can be separated to facilitate the removal of the segmented sections. The gas distribution plate 37 inside the second tower body 32 or the zeolite molecular sieve inside the first tower body 31 is cleaned and maintained. When the connecting rod 46 is inside the first square connecting hole 44 and the second square connecting hole 45, the top seat 41 and the base 42 are connected and fixed, thereby realizing the installation between the first tower body 31 and the second tower body 32. When the connecting rod 46 is no longer inside the first square connecting hole 44 and the second square connecting hole 45, the top seat 41 and the base 42 are separated, thereby realizing the disassembly between the first tower body 31 and the second tower body 32.

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0032] Please see Figures 1-5This utility model provides a technical solution: The second tower body 32 has an annular groove 33 inside its end near the first tower body 31. A sealing ring 35 is installed at the bottom of the annular groove 33. A hollow ring 34 is provided inside the annular groove 33, with one end of the hollow ring 34 abutting against the sealing ring 35. The end of the hollow ring 34 away from the sealing ring 35 is fixedly connected to the bottom of the first tower body 31. The outer wall of the hollow ring 34 is tightly fitted to the inner wall of the annular groove 33. The opposite ends of the two connecting rods 46 are wedge-shaped. Limiting grooves 47 are provided inside the opposite ends of the two connecting rods 46. Limiting blocks 48 are slidably connected inside the two limiting grooves 47. A wedge-shaped block 49 is installed between a pair of limiting blocks 48. The outer sides of block 49 are respectively fitted to the wedge-shaped ends of connecting rod 46. The bottom of the square socket 43 is rotatably connected to screw 411. One end of screw 411 extends through wedge block 49 to the outside and is threadedly connected to wedge block 49. Wedge block 49 has through holes on both sides of screw 411. Both through holes have smooth rods 410. The two ends of the two smooth rods 410 are fixedly connected to the inner wall of square socket 43. The upper end of screw 411 passes through square socket 43 and top seat 41. The upper end of screw 411 has a cross-shaped groove. Through the cooperation of annular groove 33, hollow ring 34 and sealing ring 35, when the first tower body 31 and the second tower body 32 are connected... During installation, the hollow ring 34 is embedded in the annular groove 33 and abuts against the sealing ring 35. Simultaneously, the hollow ring 34 is tightly fitted against the groove wall, forming a double-sealing structure to prevent biogas leakage and enhance the sealing performance of the connection between the first tower body 31 and the second tower body 32. Since the upper end of the screw 411 has a cross-shaped groove, inserting the tip of a Phillips screwdriver into the groove and then rotating the screwdriver causes the screw 411 to rotate. This causes the wedge block 49, connected to the external thread of the screw 411, to move stably and linearly under the sliding limit action of the smooth rod 410. Because the opposite ends of the two connecting rods 46 are wedge-shaped, and the outer sides of the wedge block 49 are respectively fitted against the wedge-shaped ends of the connecting rods 46, when the wedge block 49 moves upward... Under the action of the limiting groove 47 and the limiting block 48, a pair of connecting rods 46 are driven to retract into the square socket 43, so that the opposite ends of the pair of connecting rods 46 are flush with the outer wall of the square socket 43. At this time, the top seat 41 and the base 42 can be separated, which facilitates the disassembly between the first tower body 31 and the second tower body 32. When the wedge block 49 moves downward, under the action of the limiting groove 47 and the limiting block 48, a pair of connecting rods 46 are driven to extend outward into the square socket 43, so that the opposite ends of the pair of connecting rods 46 pass through the second square connecting hole 45 and are flush with the outer wall of the base 42. At this time, the top seat 41 and the base 42 are connected, which facilitates the installation between the first tower body 31 and the second tower body 32.

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0034] Please see Figures 1-5 This utility model provides a technical solution: A pair of sliding grooves 36 are provided on the inner wall of the second tower body 32, and a gas distribution plate 37 is slidably connected between the pair of sliding grooves 36. The gas distribution plate 37 has several gas distribution holes inside, with the hole diameter decreasing sequentially from bottom to top. A zeolite molecular sieve is provided inside the first tower body 31. An exhaust hole is provided at the center of the upper end of the first tower body 31, and an air inlet hole is provided at the center of the bottom end of the second tower body 32. The air inlet assembly 1 includes an air inlet pipe 11, which is disposed inside the air inlet hole. One end of the outer wall of the air inlet pipe 11 is fixedly connected to the inner wall of the air inlet hole. A first flange 12 is connected to the end of the air inlet pipe 11 away from the air inlet hole. The exhaust assembly 2 includes an exhaust pipe 21, which is disposed inside the exhaust hole. One end of the outer wall of the exhaust pipe 21 is fixedly connected to the inner wall of the exhaust pipe 21. A second flange 2 is connected to the end of the exhaust pipe 21 away from the exhaust hole. 2. The first flange 12 connects the air inlet pipe 11 to the external biogas pipeline, so that biogas can enter the interior of the adsorption tower body 3 through the external biogas pipeline and the air inlet pipe 11. The aperture of the gas distribution plate 37 decreases from bottom to top, so that the biogas passes evenly through the zeolite molecular sieve from bottom to top under the action of the gas distribution plate 37, prolonging the contact time between the gas and the adsorbent and improving the carbon dioxide removal efficiency. At the same time, when the first tower body 31 and the second tower body 32 are separated, the gas distribution plate 37 can be disassembled through the sliding groove 36 for easy maintenance and cleaning. The second flange 22 connects the exhaust pipe 21 to the decarbonized biogas pipeline, so that the decarbonized biogas can be discharged from the interior of the adsorption tower body 3 through the exhaust pipe 21 and the decarbonized biogas pipeline. The first flange 12 facilitates the disassembly and assembly of the adsorption tower body 3 and the external biogas pipeline, and the second flange 22 facilitates the disassembly and assembly of the adsorption tower body 3 and the decarbonized biogas pipeline.

[0035] Specifically, the working principle of this biogas decarbonization and purification adsorption tower, which is easy to disassemble and maintain, is as follows: During use, the first flange 12 connects the inlet pipe 11 to the external biogas pipeline, and the second flange 22 connects the exhaust pipe 21 to the decarbonized biogas pipeline. Biogas enters the adsorption tower body 3 through the external biogas pipeline and the inlet pipe 11. The aperture of the gas distribution plate 37 decreases sequentially from bottom to top, allowing the biogas to pass evenly through the zeolite molecular sieve from bottom to top under the action of the gas distribution plate 37, extending the contact time between the gas and the adsorbent and improving the carbon dioxide removal efficiency. The decarbonized biogas is discharged from the adsorption tower body 3 through the exhaust pipe 21 and the decarbonized biogas pipeline. When maintenance of the zeolite molecular sieve and gas distribution plate 37 inside the adsorption tower body 3 is required, the first flange 12 facilitates the disassembly of the adsorption tower body 3 and the external biogas pipeline, and the second flange 22 facilitates the disassembly of the adsorption tower body 3 and the external biogas pipeline. 2. To facilitate the disassembly of the adsorption tower body 3 and the biogas pipeline after decarbonization, insert the Phillips screwdriver tip into the Phillips groove and then rotate the Phillips screwdriver to rotate the screw 411. This causes the wedge block 49 connected to the external thread of the screw 411 to move linearly and stably under the sliding limit action of the smooth rod 410. Since the opposite ends of the two connecting rods 46 are wedge-shaped, and the outer sides of the wedge block 49 are respectively attached to the wedge-shaped ends of the connecting rods 46, when the wedge block 49 moves upward, under the action of the limiting groove 47 and the limiting block 48, it drives the pair of connecting rods 46 to retract into the square socket 43, so that the opposite ends of the pair of connecting rods 46 are flush with the outer wall of the square socket 43. At this time, the top seat 41 and the base 42 can be separated, which facilitates the disassembly between the first tower body 31 and the second tower body 32. The gas distribution plate 37 can be disassembled through the sliding groove 36 for easy maintenance and cleaning.

[0036] It should be noted that all standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. Furthermore, since this application is mainly used to protect mechanical devices, the control methods and circuit connections will not be explained in detail in this application.

Claims

1. A biogas decarbonization and purification adsorption tower that is easy to disassemble and maintain, characterized in that, The adsorption tower includes an air intake assembly (1), an exhaust assembly (2), an adsorption tower body (3), and a connecting assembly (4). The air intake assembly (1) is located at the upper end of the adsorption tower body (3), the exhaust assembly (2) is located at the bottom end of the adsorption tower body (3), and the connecting assembly (4) is located outside the adsorption tower body (3). The air intake assembly (1) is used for biogas to enter, the exhaust assembly (2) is used for the decarbonized biogas to exit, the adsorption tower body (3) is used for decarbonizing biogas, and the connecting assembly (4) is used for assembling and disassembling the first tower body (31) and the second tower body (32). The adsorption tower body (3) includes a first tower body (31), and the bottom end of the first tower body (31) is provided with a second tower body (32). The connecting assembly (4) includes several top seats (4). 1) Each of the top seats (41) has a base (42) at its bottom end. The top seats (41) are installed on the outside of the first tower body (31), and the bases (42) are installed on the outside of the second tower body (32). Each of the bases (42) has a square insertion hole inside. Each square insertion hole has a square socket (43) inside. The upper end of the square socket (43) is fixedly connected to the bottom end of the top seat (41). The square socket (43) has a first square connecting hole (44) inside on both sides. The base (42) has a second square connecting hole (45) inside on both sides. A connecting rod (46) is provided between the first square connecting hole (44) and the second square connecting hole (45) on the same side.

2. The biogas decarbonization and purification adsorption tower according to claim 1, characterized in that, The top seats (41) are distributed in an equally spaced ring, and the base seats (42) are distributed in an equally spaced ring.

3. The biogas decarbonization and purification adsorption tower according to claim 1, characterized in that, The second tower body (32) has an annular groove (33) inside one end near the first tower body (31). A sealing ring (35) is installed at the bottom of the annular groove (33). A hollow ring (34) is provided inside the annular groove (33). One end of the hollow ring (34) abuts against the sealing ring (35). The end of the hollow ring (34) away from the sealing ring (35) is fixedly connected to the bottom of the first tower body (31). The outer wall of the hollow ring (34) is tightly fitted with the inner wall of the annular groove (33).

4. The biogas decarbonization and purification adsorption tower according to claim 1, characterized in that, The two connecting rods (46) are wedge-shaped at opposite ends. Each of the two connecting rods (46) has a limiting groove (47) inside its opposite end. Each of the two limiting grooves (47) is slidably connected to a limiting block (48). A wedge block (49) is installed between the pair of limiting blocks (48). The outer sides of the wedge block (49) are respectively attached to the wedge-shaped end of the connecting rod (46).

5. The biogas decarbonization and purification adsorption tower according to claim 4, characterized in that, The bottom of the square socket (43) is rotatably connected to a screw (411). One end of the screw (411) extends through the wedge block (49) to the outside and is threadedly connected to the wedge block (49). The wedge block (49) has through holes on both sides of the screw (411). The two through holes are provided with smooth rods (410). The two ends of the two smooth rods (410) are fixedly connected to the inner wall of the square socket (43). The upper end of the screw (411) passes through the square socket (43) and the top seat (41). The upper end of the screw (411) has a cross-shaped groove.

6. The biogas decarbonization and purification adsorption tower according to claim 1, characterized in that, The inner wall of the second tower body (32) is provided with a pair of sliding grooves (36), and a gas distribution plate (37) is slidably connected between the pair of sliding grooves (36). The gas distribution plate (37) is provided with a number of gas distribution holes, and the diameter of the gas distribution holes decreases from bottom to top. The interior of the first tower body (31) is provided with zeolite molecular sieves. An exhaust hole is provided at the center of the upper end of the first tower body (31), and an air inlet hole is provided at the center of the bottom end of the second tower body (32).

7. The biogas decarbonization and purification adsorption tower according to claim 6, characterized in that, The air intake assembly (1) includes an air intake pipe (11), which is disposed inside the air intake hole. The outer wall of one end of the air intake pipe (11) is fixedly connected to the inner wall of the air intake hole. A first flange (12) is connected to the end of the air intake pipe (11) away from the air intake hole.

8. The biogas decarbonization and purification adsorption tower according to claim 7, characterized in that, The exhaust assembly (2) includes an exhaust pipe (21), which is disposed inside the exhaust hole. The outer wall of one end of the exhaust pipe (21) is fixedly connected to the inner wall of the exhaust pipe (21), and a second flange (22) is connected to the end of the exhaust pipe (21) away from the exhaust hole.

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