Self-cleaning biogas desulfurization purification device and method

Abstract

The invention belongs to the technical field of biogas desulfurization, and particularly discloses a self-cleaning biogas desulfurization purification device which comprises a desulfurization tower body, the lower end of the desulfurization tower body is connected with a supporting base, the lower portion of one side of the desulfurization tower body is connected with a gas inlet pipe, and the lower portion of one side of the desulfurization tower body is connected with a circulating pump. The input end of the circulating pump is connected with a fixed pipe, in addition, the invention also provides a self-cleaning biogas desulfurization purification method, and by adopting the method and the desulfurization device, a dual cleaning mechanism of mechanical vibration loosening and high-pressure fluid scouring can be formed through the organic combination of the vibration assembly and the backflushing assembly; sulfides in the filler layer can be more thoroughly removed, invalid attachment of a desulfurizing agent on the surfaces of impurities can be effectively reduced, the reaction efficiency of the desulfurizing agent and the sulfides in the biogas is improved, the concentration of hydrogen sulfide in the biogas is further reduced, meanwhile, the blockage risk of the filler layer is remarkably reduced, and long-term stable operation of the desulfurizing tower is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of biogas desulfurization, and particularly relates to a self-cleaning biogas desulfurization purification device and method. Background Art

[0002] Biogas, a renewable energy source, is primarily produced through anaerobic fermentation of organic waste. Besides methane and carbon dioxide, it also contains harmful impurities such as hydrogen sulfide. These gases corrode gas pipelines and combustion equipment, and the sulfur dioxide produced after combustion can cause air pollution and, at high concentrations, endanger human health. Therefore, safe utilization requires desulfurization and purification. Currently, biogas desulfurization towers commonly utilize a packing layer structure for gas-liquid contact desulfurization. However, this traditional technology has significant drawbacks: sulfides easily form and deposit on the packing surface and within its pores. Relying solely on top-spray flushing makes it difficult to clean the packing layer's bottom and internal corners, leading to a high risk of clogging and reduced desulfurization efficiency. Furthermore, maintenance requires manual disassembly and cleaning of the packing, which is labor-intensive, requires long downtime, and can damage the packing structure. Furthermore, sulfide deposits can cover the packing's active sites, reducing desulfurizer utilization and increasing operating costs. While existing improvements attempt to mitigate this issue by increasing flushing frequency or optimizing packing geometry, they still struggle to achieve both efficient cleaning and continuous, stable operation. Summary of the Invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a self-cleaning biogas desulfurization purification device and method.

[0004] In order to achieve the above objects, the present invention provides a self-cleaning biogas desulfurization purification device, comprising a desulfurization tower body, the lower end of the desulfurization tower body is connected to a supporting base, the lower part of one side of the desulfurization tower body is connected to an air inlet pipe, the lower part of one side of the desulfurization tower body is connected to a circulation pump, the input end of the circulation pump is connected to a fixed pipe, the output end of the circulation pump is connected to a delivery pipe, the lower part of the outer wall of the delivery pipe is connected to a delivery valve, the middle part of one side of the delivery pipe is connected to a liquid inlet pipe, the middle part of the outer wall of the liquid inlet pipe is connected to the liquid inlet valve, the upper end of the delivery pipe is connected to a connecting pipe, one end of the connecting pipe extends through and into the interior of the desulfurization tower body, one end of the connecting pipe is connected to a liquid spray pipe, the upper part of the inner wall of the desulfurization tower body is evenly connected with adsorption plates, the middle part of the upper end of the desulfurization tower body is connected to the air outlet pipe, and the upper part of the outer wall of the desulfurization tower body is connected to a cleaning component; The cleaning component is convenient for cleaning the residual sulfide on the filler plate; The cleaning assembly includes a cylinder, and a recoil assembly is connected to one side of the lower end of the inner wall of the cylinder; The backflush assembly facilitates backflush cleaning under the filler plate; The lower end of the desulfurization tower body is connected to a sewage pipe, the outer wall of the sewage pipe is connected to a sewage valve, the inner wall of the desulfurization tower body is connected to a guide ring, and the upper end of the guide ring is connected to a cleaning brush.

[0005] In the above technical solution, further, the upper end of the inner wall of the cylinder is evenly connected with a sliding rod, and the outer walls of multiple sliding rods are slidably connected with buffer plates. The inner walls of the buffer plates are circumferentially connected with sliders, and one end of multiple sliders extends through the interior of the desulfurization tower body. The outer wall of the desulfurization tower body is provided with sliding grooves corresponding to multiple sliders, and multiple sliders are respectively located in multiple sliding grooves and slide. Slip rings are connected between the multiple sliders, and a filler plate is connected to the middle of the inner wall of the slip ring. The upper and lower ends of the inner wall of the filler plate are inclined, and the lower ends of the two buffer plates are connected to vibration components.

[0006] In the above technical solution, further, multiple sliding rods are arranged in an inverted T-shaped structure, and the upper and lower parts of the outer walls of multiple sliding rods are evenly connected with buffer springs, among which the upper and lower ends of several buffer springs are respectively connected to the upper end of the inner wall of the cylinder and the upper end of the buffer plate, and the upper and lower ends of other several buffer springs are respectively in contact with the lower end of the buffer plate and the upper ends of multiple sliding rods.

[0007] In the above technical solution, further, the vibration component includes a connecting rod, the lower end of the connecting rod is connected to a fixed block, the middle of the lower end of the fixed block is connected to a stabilizing ring, the upper part of the outer wall of the stabilizing ring is connected to a connecting ring, the upper end of the connecting ring is connected to the lower end of the fixed block, the lower end of the connecting ring is shaped like a wave, the middle part of one side of the fixed block is connected to a moving block, one side of the moving block is connected to a moving rail, one end of the moving block is located inside the moving rail and slides, and one side of the moving rail is connected to the upper part of one side of the inner wall of the cylinder.

[0008] In the above technical solution, further, a motor is connected to one side of the lower end of the inner wall of the cylinder, and a rotating rod is connected to the lower end of the inner wall of the cylinder away from the motor. The upper part of one side of the motor output end and the upper part of one side of the rotating rod are both connected to rotating blocks, and the shape of the rotating blocks is an L-shaped structure. The upper part of one side of the two rotating blocks is rotatably connected to a support wheel, and the upper end of the support wheel contacts one side of the lower end of the connecting ring. The upper part of one side of the two rotating blocks is connected to a stabilizing block, and the shape of the stabilizing block is an L-shaped structure. Balls are embedded in the upper part of one side of the two stabilizing blocks, and one side of the two stabilizing blocks is respectively slidably connected to one side of the inner wall of the stabilizing ring.

[0009] In the above technical solution, further, the recoil assembly includes gears, and the number of the gears is two groups, wherein the inner wall of one gear is connected to the outer wall of the motor output end, and the inner wall of the other gear is connected to the upper part of the outer wall of the rotating rod, the upper part of one side of the conveying pipe is connected to the mounting pipe, one side of the outer wall of the mounting pipe is connected to the mounting valve, and one end of the mounting pipe extends through to the interior of the desulfurization tower body.

[0010] In the above technical solution, further, one end of the two gears extends through the interior of the desulfurization tower body, and a gear ring is meshed between the two gears. A connecting rail is connected to the inner wall of the desulfurization tower body corresponding to the outer wall of the gear ring. The inner wall of the connecting rail is circumferentially slidably connected to a connecting block. One side of the plurality of connecting blocks is respectively connected to the lower part of the outer wall of the gear ring. In the above technical solution, further, the upper end of the mounting tube is connected to a rotating joint, the upper end of the rotating joint is connected to a support tube, the upper part of the outer wall of the support tube is evenly circumferentially connected to a flushing pipe, the flushing pipe is inclined, and the upper end of the flushing pipe is evenly connected to a flushing nozzle, and the lower end of the cleaning brush is in contact with the upper ends of several of the flushing nozzles.

[0011] In the above technical solution, further, the outer wall of the support tube is circumferentially connected with a first support rod, one end of each of the first support rods is respectively connected to the inner wall of the gear ring, the upper ends of each of the first support rods are connected to a second support rod, and the upper ends of each of the second support rods are respectively connected to one side of the lower end of the flushing pipe. A self-cleaning biogas desulfurization purification method includes the following methods of use: S1: Sulfur-containing biogas enters the desulfurization tower through the air inlet pipe. At this time, the delivery valve is closed, the feed valve is open, and the installation valve is closed. The desulfurizer is sprayed out through the liquid inlet pipe and the liquid spray pipe. The filler plate increases the gas-liquid contact area to achieve sulfide absorption. The purified gas is discharged from the air outlet pipe. After the gas and liquid come into contact, the sulfur-containing biogas reacts with the desulfurizer, and the liquid absorbs the sulfide. Most of the sulfide falls to the bottom of the desulfurization tower along with the liquid, while a small amount of sulfide remains inside the filler plate. S2: After long-term use, when the packing plate needs to be cleaned, the installation valve is opened. The desulfurizer is not only transported to the inside of the liquid spray pipe through the connecting pipe, but also sprayed out through the installation pipe, support pipe and multiple flushing pipes to flush the bottom of the packing plate. At the same time, the motor drives the gear and gear ring to rotate, driving the multiple flushing pipes to rotate, which can realize flushing of different positions under the packing plate, ensuring that the bottom of the packing plate is fully flushed. S3: During the flushing process, the rotation of the motor drives the gear above it to rotate, thereby driving the gear ring on one side to rotate. The rotation of the gear ring also drives the gear on the outer wall of the rotating rod to rotate, and then drives the rotating rod to rotate. Under the synchronous rotation of the motor and the rotating rod, the rotating block drives the support wheels to slide under the two connecting rings respectively. Since the bottom of the connecting ring is arranged in a wavy shape, when the support wheel rolls in a circle under the connecting ring, it can push the connecting ring to move up and down, and then push the buffer plate to drive the slip ring and the filler plate to shake up and down. Multiple buffer springs buffer the buffer plate, and push the filler plate to shake up and down while the filler plate is recoiled, thereby further achieving high-efficiency cleaning of sulfides inside the filler plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The vibration component drives the support wheel to roll under the wavy connecting ring through the motor and the rotating rod, driving the filler plate to produce high-frequency up and down vibration. This mechanical vibration can effectively destroy the adsorption structure of sulfides attached to the filler surface and in the pores, loosen the stubborn deposited impurities, and break the dilemma of traditional desulfurization towers that are difficult to clean due to the compaction of sulfides. Compared with traditional cleaning methods, the vibration component can improve the loosening efficiency of sulfides, greatly reduce the difficulty of subsequent cleaning operations, lay the foundation for the complete removal of impurities, effectively prevent the filler layer from being blocked, and extend the service life of the filler. The flushing pipe and flushing nozzle of the recoil component spray desulfurizer at high pressure from under the packing plate, and cooperate with the motor-driven gear and gear ring to drive the flushing pipe to rotate, so as to achieve all-round flushing under the packing plate. The impact force of the high-pressure fluid can penetrate deep into the dead corners inside the packing layer and strongly flush away the residual sulfides. Compared with the traditional method that only relies on top spraying, the recoil component has a higher cleaning coverage rate for the bottom of the packing layer and hidden areas, effectively solving the problem of blind spots in the cleaning of traditional desulfurization towers, ensuring that the packing layer always maintains a good transparent state, and maintaining the efficient operation of the desulfurization tower. Through the organic combination of the vibration component and the recoil component, a dual cleaning mechanism of mechanical vibration loosening and high-pressure fluid flushing is formed. The vibration loosens the sulfide from the packing surface, and the recoil promptly washes away the loose impurities. The two work together, and compared with a single cleaning method, the overall cleaning efficiency is improved. This synergistic effect can not only more thoroughly remove the sulfide in the packing layer, but also effectively reduce the ineffective attachment of the desulfurizer on the impurity surface, improve the reaction efficiency of the desulfurizer with the sulfide in the biogas, and further reduce the concentration of hydrogen sulfide in the biogas. At the same time, it significantly reduces the risk of packing layer blockage and ensures the long-term stable operation of the desulfurization tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the device proposed in the present invention; Figure 2 This is a schematic diagram of the installation structure of the connecting pipe proposed in the present invention; Figure 3 This is a schematic diagram of the installation structure of the installation pipe proposed in the present invention; Figure 4 This is a schematic diagram of the installation structure of the air intake pipe proposed by the present invention; Figure 5 This is a schematic diagram of the installation structure of the connecting block proposed in the present invention; Figure 6 The present invention proposes Figure 5 Schematic diagram of the enlarged structure of A; Figure 7 This is a schematic diagram of the installation structure of the gear proposed in the present invention; Figure 8 This is a schematic diagram of the installation structure of the movable rail proposed in the present invention; Figure 9 This is a schematic diagram of the installation structure of the flushing pipe proposed in the present invention; Figure 10 This is a schematic diagram of the installation structure of the connecting ring proposed in the present invention.

[0014] Figure: 1, desulfurization tower body; 2, support base; 3, air inlet pipe; 4, circulation pump; 5, fixed pipe; 6, delivery pipe; 7, liquid inlet pipe; 8, connecting pipe; 9, liquid spray pipe; 10, adsorption plate; 11, air outlet pipe; 12, cylinder; 13, slide rod; 14, buffer plate; 15, buffer spring; 16, slider; 17, slide groove; 18, slip ring; 19, filler plate; 20, connecting rod; 21, fixed block; 22, stabilizing ring; 2 3. Connecting ring; 24. Moving rail; 25. Moving block; 26. Motor; 27. Turning rod; 28. Rotating block; 29. ​​Support wheel; 30. Stabilizing block; 31. Gear; 32. Gear ring; 33. Connecting rail; 34. Connecting block; 35. Mounting pipe; 36. Rotating joint; 37. Support pipe; 38. Flushing pipe; 39. Flushing nozzle; 40. First support rod; 41. Second support rod; 42. Drain pipe; 43. Cleaning brush. DETAILED DESCRIPTION

[0015] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] like Figures 1-10The self-cleaning biogas desulfurization purification device shown in the figure includes a desulfurization tower body 1, the lower end of the desulfurization tower body 1 is connected to a supporting base 2, the lower part of one side of the desulfurization tower body 1 is connected to an air inlet pipe 3, the lower part of one side of the desulfurization tower body 1 is connected to a circulating pump 4, the input end of the circulating pump 4 is connected to a fixed pipe 5, the output end of the circulating pump 4 is connected to a delivery pipe 6, the lower part of the outer wall of the delivery pipe 6 is connected to a delivery valve, the middle part of one side of the delivery pipe 6 is connected to a liquid inlet pipe 7, the middle part of the outer wall of the liquid inlet pipe 7 is connected to the liquid inlet valve, the upper end of the delivery pipe 6 is connected to a connecting pipe 8, one end of the connecting pipe 8 extends through the interior of the desulfurization tower body 1, and one end of the connecting pipe 8 is connected to a spray nozzle. Liquid pipe 9, adsorption plates 10 are evenly connected to the upper part of the inner wall of the desulfurization tower body 1, an outlet pipe 11 is connected to the middle part of the upper end of the desulfurization tower body 1, and a cleaning component is connected to the upper part of the outer wall of the desulfurization tower body 1. The cleaning component is convenient for cleaning the sulfide remaining on the filler plate 19. The cleaning component includes a cylinder 12, and a backflush component is connected to one side of the lower end of the inner wall of the cylinder 12. The backflush component facilitates backwashing and cleaning below the filler plate 19. The lower end of the desulfurization tower body 1 is connected to a drain pipe 42, and a drain valve is connected to one side of the outer wall of the drain pipe 42. A guide ring is connected to one side of the inner wall of the desulfurization tower body 1, and a cleaning brush 43 is connected to the upper end of the guide ring; The sulfur-containing biogas enters the desulfurization tower body 1 through the air inlet pipe 3. At this time, the delivery valve is closed and the liquid inlet valve is opened. Driven by the circulation pump 4, the desulfurizer passes through the liquid inlet pipe 7, the delivery pipe 6, and the connecting pipe 8 in sequence, and finally enters the liquid spray pipe 9 and is sprayed out in atomized form at a suitable pressure. The filler plate 19 increases the gas-liquid contact area and prolongs the gas-liquid contact time, creating good conditions for the desulfurization reaction. The hydrogen sulfide and other sulfides in the sulfur-containing biogas fully contact with the atomized desulfurizer on the surface of the filler plate 19 and the surrounding space, and a chemical reaction occurs. The sulfide is absorbed by the desulfurizer, achieving a higher reaction efficiency. The purified gas flows upward, first The residual impurities are adsorbed by the adsorption plate 10 and then discharged from the outlet pipe 11; the liquid after the gas-liquid reaction carries most of the sulfides and flows downward, falling into the bottom of the desulfurization tower body 1, and a small amount of sulfides still remain inside the filler plate 19. At the same time, the filter screen arranged at the bottom of the inner wall of the desulfurization tower body 1 can filter the impurities and part of the sulfides in the liquid. The filtered impurities and sulfides are discharged through the discharge pipe in the middle of the lower end of the filter screen to ensure the purity of the subsequent desulfurizer circulation. The filtered desulfurizer is driven by the circulation pump 4, passes through the fixed pipe 5 and the delivery pipe 6 in turn, and finally returns to the liquid spray pipe 9 to achieve recycling.

[0017] The upper end of the inner wall of the cylinder 12 is evenly connected with a slide rod 13, and the outer wall of the multiple slide rods 13 is slidably connected with a buffer plate 14. The inner wall of the buffer plate 14 is circumferentially connected with a slider 16. One end of the multiple sliders 16 extends through the inside of the desulfurization tower body 1. The outer wall of the desulfurization tower body 1 is provided with a slide groove 17 corresponding to the multiple sliders 16. The multiple sliders 16 are respectively located in the multiple slide grooves 17 and slide. A slip ring 18 is connected between the multiple sliders 16. The middle of the inner wall of the slip ring 18 is connected with a filler plate 19. The upper and lower ends of the inner wall of the filler plate 19 are inclined. The lower ends of the two buffer plates 14 are connected to the vibration assembly, and the multiple slide rods 13 are arranged in an inverted T-shaped structure. The upper and lower parts of the outer walls of the multiple slide rods 13 are evenly connected with buffer springs 15, wherein the upper and lower ends of several buffer springs 15 are respectively connected to the upper end of the inner wall of the cylinder 12 and the upper end of the buffer plate 14, and the upper and lower ends of the other several buffer springs 15 are respectively in contact with the lower end of the buffer plate 14 and the upper ends of the multiple slide rods 13. The vibration assembly includes a connecting rod 20, and the lower end of the connecting rod 20 is connected to a fixed block 21. The middle part of the lower end of the fixed block 21 A stabilizing ring 22 is connected, and a connecting ring 23 is connected to the upper part of the outer wall of the stabilizing ring 22. The upper end of the connecting ring 23 is connected to the lower end of the fixed block 21. The lower end of the connecting ring 23 is shaped like a wave. A moving block 25 is connected to the middle part of one side of the fixed block 21. One side of the moving block 25 is connected to a moving rail 24. One end of the moving block 25 slides inside the moving rail 24. One side of the moving rail 24 is connected to the upper part of one side of the inner wall of the cylinder 12. One side of the lower end of the inner wall of the cylinder 12 is connected to a motor 26. The lower end of the inner wall of the cylinder 12 is connected to the side away from the motor 26. The rotating rod 27, the upper part of one side of the output end of the motor 26 and the upper part of one side of the rotating rod 27 are connected to a rotating block 28, the shape of the rotating block 28 is set in an L-shaped structure, the upper part of one side of the two rotating blocks 28 is rotatably connected to the support wheel 29, the upper end of the support wheel 29 is in contact with one side of the lower end of the connecting ring 23, and the upper part of one side of the two rotating blocks 28 is connected to a stabilizing block 30, the shape of the stabilizing block 30 is set in an L-shaped structure, the upper part of one side of the two stabilizing blocks 30 are embedded with balls, and one side of the two stabilizing blocks 30 is respectively slidably connected to one side of the inner wall of the stabilizing ring 22; After the packing plate 19 has been used for a long time, in order to ensure the desulfurization efficiency, the cleaning component needs to be started for cleaning. At this time, the installation valve is opened. In addition to continuing to be sprayed out through the liquid spray pipe 9 to maintain regular desulfurization operations, the desulfurizer will also enter the support pipe 37 through the installation pipe 35 and the rotating joint 36, and be sprayed out at high pressure from the inclined flushing pipe 38 and the flushing nozzle 39 to reversely flush the bottom of the packing plate 19. At the same time, the motor 26 is started, and its output end drives the gear 31 connected to it to rotate. The gear 31 engages with the gear ring 32, and then drives the gear ring 32 and multiple connecting blocks 34 to rotate in the connecting rail 33. Since the gear ring 32 is connected to the support pipe 37 through the first support rod 40, the gear ring 32 will drive the support pipe 37 and the flushing pipe 38 to rotate synchronously when it rotates, thereby realizing all-round flushing of different positions below the packing plate 19, ensuring that the sulfide residues at the bottom of the packing plate 19 are effectively removed. The recoil assembly includes gears 31, and there are two groups of gears 31. The inner wall of one gear 31 is connected to the outer wall of the output end of the motor 26, and the inner wall of the other gear 31 is connected to the upper part of the outer wall of the rotating rod 27. One end of the two gears 31 extends through the inside of the desulfurization tower body 1. The desulfurization tower body 1 is provided with openings corresponding to the two gears 31. The inner wall of the desulfurization tower body 1 is connected to a guide ring corresponding to the upper end of the gear 31. The upper end of the guide ring is inclined. A gear ring 32 is meshed and connected between the two gears 31. The inner wall of the desulfurization tower body 1 is connected to the outer wall of the gear ring 32 corresponding to the outer wall of the gear ring 32. The inner wall of the connecting rail 33 is circumferentially slidably connected to a connecting block 34. One side of the multiple connecting blocks 34 is respectively connected to the lower part of the outer wall of the gear ring 32. The upper side of the conveying pipe 6 is connected to a mounting pipe 35. The outer wall of the mounting pipe 35 One side is connected to a mounting valve, one end of the mounting pipe 35 extends through the interior of the desulfurization tower body 1, the upper end of the mounting pipe 35 is connected to a rotating joint 36, the upper end of the rotating joint 36 is connected to a support pipe 37, the upper part of the outer wall of the support pipe 37 is evenly circumferentially connected to a flushing pipe 38, the flushing pipe 38 is inclined, the upper end of the flushing pipe 38 is evenly connected to a flushing nozzle 39, the lower end of the cleaning brush 43 is in contact with the upper ends of several of the flushing nozzles 39, the outer wall of the support pipe 37 is circumferentially connected to a first support rod 40, one end of the multiple first support rods 40 is respectively connected to the inner wall of the gear ring 32, the upper ends of the multiple first support rods 40 are connected to the second support rod 41, the upper ends of the multiple second support rods 41 are respectively connected to one side of the lower end of the flushing pipe 38, and the cleaning brush 43 can brush the liquid outlets of the multiple flushing nozzles 39; During the backwash cleaning process, the rotation of the motor 26 not only drives the gear 31 and the gear ring 32, but the rotation of the gear ring 32 also drives the gear 31 on the outer wall of the rotating rod 27 to rotate, thereby rotating the rotating rod 27. The motor 26 and the rotating block 28 on the rotating rod 27 drive the supporting wheel 29 to roll under the symmetrically arranged connecting ring 23. Since the lower end of the connecting ring 23 is wavy, the supporting wheel 29 pushes the connecting ring 23 to move up and down when rolling. The connecting ring 23 is connected to the buffer plate 14 through the stabilizing ring 22, the fixing block 21, and the connecting rod 20, thereby driving the buffer plate 14 to move upward. The buffer plate 14 is connected to the filler plate 19 through the slider 16 and the slip ring 18, so that the filler plate 19 shakes up and down. During the shaking process, the buffer spring 15 buffers the buffer plate 14 and enhances the shaking effect. The up and down shaking of the filler plate 19 cooperates with the rotation flushing of the flushing pipe 38. From the two dimensions of mechanical vibration and fluid flushing, the cleaning efficiency of the sulfide inside the filler plate 19 is further improved. Compared with the traditional cleaning method, the cleaning time is greatly shortened, and the problem that the traditional cleaning method is difficult to remove dead corner deposits is effectively solved.

[0018] A self-cleaning biogas desulfurization purification method includes the following methods of use: S1: Sulfur-containing biogas enters the desulfurization tower body 1 through the air inlet pipe 3. At this time, the delivery valve is closed, the feed valve is open, and the installation valve is in the closed state. The desulfurizer is sprayed out through the liquid inlet pipe 7 and the liquid spray pipe 9. The filler plate 19 increases the gas-liquid contact area to achieve sulfide absorption. The purified gas is discharged from the air outlet pipe 11. After the gas-liquid contact, the sulfur-containing biogas reacts with the desulfurizer, and the liquid absorbs the sulfide. Most of the sulfide falls to the bottom of the desulfurization tower body 1 with the liquid, while a small amount of sulfide remains inside the filler plate 19. S2: After long-term use, when the packing plate 19 needs to be cleaned, the installation valve is opened, and the desulfurizer is not only transported to the inside of the liquid spraying pipe 9 through the connecting pipe 8, but also sprayed out through the installation pipe 35, the support pipe 37 and the multiple flushing pipes 38 to achieve flushing of the bottom of the packing plate 19. At the same time, the motor 26 drives the gear 31 and the gear ring 32 to rotate, driving the multiple flushing pipes 38 to rotate, so that different positions below the packing plate 19 can be flushed, ensuring that the bottom of the packing plate 19 is fully flushed; S3: During the flushing process, the rotation of the motor 26 drives the gear 31 above it to rotate, thereby driving the gear ring 32 on one side to rotate. The rotation of the gear ring 32 simultaneously drives the gear 31 on the outer wall of the rotating rod 27 to rotate, and then drives the rotating rod 27 to rotate. Under the synchronous rotation of the motor 26 and the rotating rod 27, the rotating block 28 drives the support wheel 29 to slide under the two connecting rings 23 respectively. Since the bottom of the connecting ring 23 is arranged in a wavy shape, when the support wheel 29 is located under the connecting ring 23 and rolls in a ring, it can push the connecting ring 23 to move up and down, and then push the buffer plate 14 to drive the slip ring 18 and the filler plate 19 to shake up and down. Multiple buffer springs 15 buffer the buffer plate 14, and push the filler plate 19 to shake up and down while the filler plate 19 is undergoing a backflushing process, thereby further achieving high-efficiency cleaning of the sulfide inside the filler plate 19.

[0019] Working principle: Sulfur-containing biogas enters the desulfurization tower body 1 through the air inlet pipe 3. At this time, the delivery valve is closed and the liquid inlet valve is opened. The desulfurizer (such as lime water) enters the liquid spray pipe 9 through the liquid inlet pipe 7, the delivery pipe 6, and the connecting pipe 8, and is sprayed out in the form of atomization. Inside the desulfurization tower body 1, the filler plate 19 significantly increases the gas-liquid contact area with its unique structure, creating sufficient conditions for the desulfurization reaction. The hydrogen sulfide and other sulfides in the sulfur-containing biogas fully contact with the atomized desulfurizer on the surface of the filler plate 19 and the surrounding space, and a chemical reaction occurs. The sulfide is absorbed by the desulfurizer, and the purified gas flows upward. The adsorption plate 10 adsorbs the residual impurities and finally discharges them from the outlet pipe 11; the liquid after the gas-liquid reaction carries most of the sulfide and flows downward, falling into the bottom of the desulfurization tower body 1, and a small amount of sulfide remains inside the filler plate 19. A filter is connected to the bottom of the inner wall of the desulfurization tower body 1 to filter out some impurities and some sulfide. A drainage pipe is connected to the middle part of the lower end of the filter. The impurities and sulfide above the filter are discharged through the drainage pipe, and the desulfurizer at the bottom of the desulfurization tower body 1 is re-delivered to the top of the liquid spray pipe 9 through the circulating pump 4, the fixed pipe 5 and the delivery pipe 6, thereby realizing the recycling of the desulfurizer. When the packing plate 19 needs to be cleaned after long-term use, the device starts the cleaning component. At this time, the installation valve is opened. In addition to continuing to be sprayed out through the liquid spray pipe 9 for conventional desulfurization, the desulfurizer will also enter the support pipe 37 through the installation pipe 35 and the rotating joint 36, and be sprayed out from the inclined flushing pipe 38 and the flushing nozzle 39 to reversely flush the bottom of the packing plate 19. At the same time, the motor 26 is started, and its output end drives the gear 31 connected thereto to rotate. The gear 31 engages with the gear ring 32, thereby driving the gear ring 32 to rotate in the connecting rail 33. The gear ring 32 is connected to the support pipe 37 through the first support rod 40. Therefore, when the gear ring 32 rotates, it will drive the support pipe 37 and the flushing pipe 38 to rotate synchronously, realizing all-round flushing of different positions below the packing plate 19, ensuring sufficient flushing and effectively removing sulfide residues at the bottom of the packing plate 19. When the flushing pipe 38 drives multiple flushing nozzles 39 to rotate, it contacts the lower end of the cleaning brush 43, which can brush multiple flushing nozzles 39; During the backwash cleaning process, the rotation of the motor 26 not only drives the gear 31 and the gear ring 32, but the gear ring 32 also drives the gear 31 on one side thereof to rotate, thereby driving the rotating rod 27 to rotate. The motor 26 and the rotating block 28 on the rotating rod 27 drive the supporting wheel 29 to roll under the connecting ring 23. The two connecting rings 23 are symmetrically arranged. Since the lower end of the connecting ring 23 is wavy, the supporting wheel 29 pushes the connecting ring 23 to move up and down when rolling. The connecting ring 23 is connected to the buffer plate 14 through the stabilizing ring 22, the fixed block 21, and the connecting rod 20, thereby driving the buffer plate 14 to move up and down. The buffer plate 14 is connected to the filling plate 19 through the slider 16 and the slip ring 18, so that the filling plate 19 shakes up and down accordingly. During the shaking process, the buffer spring 15 plays a buffering role on the buffer plate 14 and enhances the shaking effect. The up and down shaking of the filling plate 19 cooperates with the rotating flushing of the flushing pipe 38 to further improve the cleaning efficiency of the sulfide inside the filling plate 19, effectively solving the problem that the traditional cleaning method is difficult to remove dead corner deposits. After the gas-liquid reaction, the liquid carrying sulfide falls to the bottom of the desulfurization tower body 1 and is discharged through the drain pipe 42. The drain valve on the drain pipe 42 can control the liquid discharge. The discharged liquid enters the subsequent processing link. After separation treatment processes such as precipitation, filtration, and oxidation, the sulfide and the desulfurizer are separated. By controlling the opening and closing status of the delivery valve, liquid inlet valve, and installation valve, the flow direction and flow rate of the desulfurizer can be flexibly adjusted to ensure that the desulfurizer is reasonably distributed in different links such as desulfurization reaction and backwash cleaning, thereby improving the utilization efficiency of the desulfurizer and reducing operating costs.

[0020] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the invention as claimed.

Claims

1. A self-cleaning biogas desulfurization purification device, comprising a desulfurization tower body (1), characterized in that: The lower end of the desulfurization tower body (1) is connected to a support base (2), the lower part of one side of the desulfurization tower body (1) is connected to an air inlet pipe (3), the lower part of one side of the desulfurization tower body (1) is connected to a circulation pump (4), the input end of the circulation pump (4) is connected to a fixed pipe (5), the output end of the circulation pump (4) is connected to a delivery pipe (6), the lower part of the outer wall of the delivery pipe (6) is connected to a delivery valve, the middle part of one side of the delivery pipe (6) is connected to a liquid inlet pipe (7), the middle part of the outer wall of the liquid inlet pipe (7) is connected to a liquid inlet valve, the upper end of the delivery pipe (6) is connected to a connecting pipe (8), one end of the connecting pipe (8) extends through the interior of the desulfurization tower body (1), one end of the connecting pipe (8) is connected to a liquid spray pipe (9), the upper part of the inner wall of the desulfurization tower body (1) is evenly connected to an adsorption plate (10), the middle part of the upper end of the desulfurization tower body (1) is connected to an air outlet pipe (11), and the upper part of the outer wall of the desulfurization tower body (1) is connected to a cleaning component; The cleaning assembly facilitates the cleaning of residual sulfides on the filler plate (19); The cleaning assembly comprises a cylinder (12), and a recoil assembly is connected to one side of the lower end of the inner wall of the cylinder (12); The backflushing assembly facilitates backflushing cleaning of the lower portion of the packing plate (19); The lower end of the desulfurization tower body (1) is connected to a sewage pipe (42), the outer wall of the sewage pipe (42) is connected to a sewage valve, the inner wall of the desulfurization tower body (1) is connected to a guide ring, and the upper end of the guide ring is connected to a cleaning brush (43).

2. A self-cleaning biogas desulfurization purification device according to claim 1, characterized in that: The upper end of the inner wall of the cylinder (12) is evenly connected with a slide rod (13), and the outer walls of multiple slide rods (13) are slidably connected with a buffer plate (14). The inner walls of the buffer plates (14) are circumferentially connected with sliders (16), and one end of multiple sliders (16) extends through the interior of the desulfurization tower body (1). The outer wall of the desulfurization tower body (1) is provided with a slide groove (17) corresponding to the multiple sliders (16). The multiple sliders (16) are respectively located in the multiple slide grooves (17) and slide. Slip rings (18) are connected between the multiple sliders (16). The middle part of the inner wall of the slip ring (18) is connected with a filler plate (19). The upper end and the lower end of the inner wall of the filler plate (19) are both inclined. The lower ends of the two buffer plates (14) are connected with a vibration component.

3. A self-cleaning biogas desulfurization purification device according to claim 2, characterized in that: The plurality of slide bars (13) are arranged in an inverted T-shaped structure, and the upper and lower parts of the outer walls of the plurality of slide bars (13) are evenly connected with buffer springs (15), wherein the upper and lower ends of several of the buffer springs (15) are respectively connected to the upper end of the inner wall of the cylinder (12) and the upper end of the buffer plate (14), and the upper and lower ends of the other plurality of buffer springs (15) are respectively in contact with the lower end of the buffer plate (14) and the upper ends of the plurality of slide bars (13).

4. A self-cleaning biogas desulfurization purification device according to claim 2, characterized in that: The vibration assembly includes a connecting rod (20), the lower end of the connecting rod (20) is connected to a fixed block (21), the middle of the lower end of the fixed block (21) is connected to a stabilizing ring (22), the upper part of the outer wall of the stabilizing ring (22) is connected to a connecting ring (23), the upper end of the connecting ring (23) is connected to the lower end of the fixed block (21), the lower end of the connecting ring (23) is shaped like a wave, the middle part of one side of the fixed block (21) is connected to a moving block (25), one side of the moving block (25) is connected to a moving rail (24), one end of the moving block (25) is located inside the moving rail (24) and slides, and one side of the moving rail (24) is connected to the upper part of one side of the inner wall of the cylinder (12).

5. The self-cleaning biogas desulfurization purification device according to claim 2, characterized in that: A motor (26) is connected to one side of the lower end of the inner wall of the cylinder (12), and a rotating rod (27) is connected to the side of the lower end of the inner wall of the cylinder (12) away from the motor (26). The upper part of one side of the output end of the motor (26) and the upper part of one side of the rotating rod (27) are both connected to a rotating block (28). The rotating block (28) is in an L-shaped structure. The upper part of one side of the two rotating blocks (28) is rotatably connected to a supporting wheel (29). The upper end of the supporting wheel (29) contacts one side of the lower end of the connecting ring (23). The upper part of one side of the two rotating blocks (28) is connected to a stabilizing block (30). The stabilizing block (30) is in an L-shaped structure. The upper part of one side of the two stabilizing blocks (30) is embedded with a ball. One side of the two stabilizing blocks (30) is respectively slidably connected to one side of the inner wall of the stabilizing ring (22).

6. The self-cleaning biogas desulfurization purification device according to claim 1, characterized in that: The recoil assembly includes gears (31), and the number of the gears (31) is two groups, wherein the inner wall of one of the gears (31) is connected to the outer wall of the output end of the motor (26), and the inner wall of the other gear (31) is connected to the upper part of the outer wall of the rotating rod (27). The upper part of one side of the conveying pipe (6) is connected to a mounting pipe (35), and one side of the outer wall of the mounting pipe (35) is connected to a mounting valve. One end of the mounting pipe (35) extends through the interior of the desulfurization tower body (1).

7. A self-cleaning biogas desulfurization purification device according to claim 6, characterized in that: One end of the two gears (31) extends through the interior of the desulfurization tower body (1), and a gear ring (32) is meshedly connected between the two gears (31). A connecting rail (33) is connected to the inner wall of the desulfurization tower body (1) corresponding to the outer wall of the gear ring (32). The inner wall of the connecting rail (33) is circumferentially slidably connected to a connecting block (34), and one side of the plurality of connecting blocks (34) is respectively connected to the lower portion of the outer wall of the gear ring (32).

8. The self-cleaning biogas desulfurization purification device according to claim 6, characterized in that: The upper end of the mounting tube (35) is connected to a rotating joint (36), the upper end of the rotating joint (36) is connected to a support tube (37), the upper portion of the outer wall of the support tube (37) is evenly connected to a flushing tube (38) in a circumferential direction, the flushing tube (38) is arranged obliquely, and the upper end of the flushing tube (38) is evenly connected to a flushing nozzle (39), and the lower end of the cleaning brush (43) contacts the upper ends of several of the flushing nozzles (39).

9. The self-cleaning biogas desulfurization purification device according to claim 8, characterized in that: The outer wall of the support tube (37) is circumferentially connected to a first support rod (40), one end of each of the first support rods (40) is connected to the inner wall of the gear ring (32), the upper ends of each of the first support rods (40) are connected to a second support rod (41), and the upper ends of each of the second support rods (41) are connected to one side of the lower end of the flushing tube (38).

10. A self-cleaning biogas desulfurization and purification method, using a self-cleaning biogas desulfurization and purification device according to any one of claims 1 to 9, characterized in that: Including the following usage: S1: Sulfur-containing biogas enters the desulfurization tower body (1) through the air inlet pipe (3). At this time, the delivery valve is closed, the feed valve is opened, and the installation valve is in a closed state. The desulfurizer is sprayed out through the liquid inlet pipe (7) and the liquid spray pipe (9). The filler plate (19) increases the gas-liquid contact area to achieve sulfide absorption. The purified gas is discharged from the air outlet pipe (11). After the gas and liquid contact, the sulfur-containing biogas reacts with the desulfurizer, and the liquid absorbs the sulfide. Most of the sulfide falls to the bottom of the desulfurization tower body (1) along with the liquid, while a small amount of sulfide remains inside the filler plate (19); S2: After long-term use, when the packing plate (19) needs to be cleaned, the installation valve is opened, and the desulfurizer is not only transported to the inside of the liquid spraying pipe (9) through the connecting pipe (8), but also sprayed out through the installation pipe (35), the support pipe (37) and the multiple flushing pipes (38), so as to realize flushing of the bottom of the packing plate (19). At the same time, the motor (26) drives the gear (31) and the gear ring (32) to rotate, driving the multiple flushing pipes (38) to rotate, so as to realize flushing of different positions below the packing plate (19), ensuring that the bottom of the packing plate (19) is flushed more fully; S3: During the flushing process, the motor (26) rotates and drives the gear (31) above it to rotate, thereby driving the gear ring (32) on one side to rotate. The gear ring (32) rotates and drives the gear (31) on the outer wall of the rotating rod (27) to rotate, thereby driving the rotating rod (27) to rotate. Under the synchronous rotation of the motor (26) and the rotating rod (27), the rotating block (28) drives the supporting wheel (29) to slide under the two connecting rings (23). Since the bottom of the connecting ring (23) is arranged in a wavy shape, when the supporting wheel (29) is located under the connecting ring (23) and rolls in a ring shape, it can push the connecting ring (23) to move up and down, thereby pushing the buffer plate (14) to drive the slip ring (18) and the filler plate (19) to shake up and down. Multiple buffer springs (15) buffer the buffer plate (14). When the filler plate (19) is backflushing, it pushes the filler plate (19) to shake up and down, further achieving high efficiency for cleaning the sulfide inside the filler plate (19).

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