A biogas purification and regeneration device and process for wastewater treatment plants

Abstract

This invention discloses a biogas purification and regeneration device and process for wastewater treatment plants, relating to the technical field of biogas purification devices. It solves the technical problem of long regeneration time of the packing layer, requiring the cessation of biogas supply, which affects biogas purification efficiency. The device includes: a desulfurization tower with an inlet at its bottom for biogas entry; and a replacement and purification structure installed inside the desulfurization tower, comprising: an annular storage box fitted outside the desulfurization tower for storing packing material; and Raschig rings embedded inside the desulfurization tower. This invention allows for the replacement and replenishment of the packing material in the Raschig rings without stopping biogas supply, ensuring continuous biogas desulfurization and purification without interrupting biogas production. This allows for the regeneration of the packing material without stopping biogas production, facilitating reuse of the packing material for biogas desulfurization, reducing downtime costs, and improving biogas desulfurization and purification efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of biogas purification devices, specifically a biogas purification and regeneration device and process for sewage treatment plants. Background Technology

[0002] In wastewater treatment plants, the purification and regeneration of biogas (mainly composed of methane) is a key step in achieving "sludge resource utilization and energy self-sufficiency." The core logic is: by increasing the methane concentration (removing impurities) through biogas purification technology, the biogas is converted into high-value-added energy (such as natural gas or vehicle fuel) or chemical raw materials; simultaneously, byproducts recovered during the purification process (such as carbon dioxide and hydrogen sulfide) can also be reused; ultimately, the purified biogas serves as a clean energy source to support the wastewater treatment system, reducing operational energy consumption.

[0003] In some existing desulfurization towers, during the desulfurization and purification process, the reaction between the biogas and the packing layer gradually becomes saturated. This leads to the cessation of biogas delivery and the regeneration of the packing layer. The regeneration of the packing layer takes a long time, affecting the continuous purification of biogas and thus impacting the biogas purification efficiency. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes a biogas purification and regeneration device and process for wastewater treatment plants.

[0005] A biogas purification and regeneration device and process for wastewater treatment plants includes:

[0006] A desulfurization tower, wherein an air inlet for biogas to enter is provided at the bottom of the desulfurization tower;

[0007] A replacement and purification structure installed inside the desulfurization tower, the replacement and purification structure comprising:

[0008] An annular storage tank fitted outside the desulfurization tower for storing packing material;

[0009] Raschig rings, the packing material embedded inside the desulfurization tower;

[0010] A recovery component for recovering saturated packing material inside Raschig rings;

[0011] And a feeding component that distributes new packing material from above the packing Raschig ring.

[0012] Preferably, the fabric component for replenishing the filler Raschig rings includes:

[0013] An annular toothed ring is fixed to the inner wall of the desulfurization tower, and an annular rail is provided on the inner wall of the desulfurization tower below the annular toothed ring.

[0014] A fabric suction pump installed on an annular storage tank, the fabric suction pump being used to suction the filler material inside the annular storage tank and supply it to the fabric nozzle;

[0015] A guide slide is fitted onto a ring track, and a drive motor housing is provided on the guide slide. A drive gear that meshes with a ring gear ring is provided on the top of the drive motor housing.

[0016] A support frame for supporting the fabric nozzle, the support frame and the guide slide move synchronously.

[0017] Preferably, the fabric suction pump is provided with a first feeding pipe, and a fabric pipe is provided between the first feeding pipe and the fabric nozzle. A support plate is provided on the guide slide, and a drive cylinder is embedded inside the support plate. One end of the drive cylinder is connected to the support frame.

[0018] Preferably, an annular frame is provided on the outer side of the Raschig ring, and the recovery component for recovering the saturated packing material inside the Raschig ring includes:

[0019] Corrugated pipe installed at the bottom of the annular frame;

[0020] A material discharge hood is installed at the bottom of the bellows, and a material cylinder is provided at the conical end of the material discharge hood;

[0021] A recovery suction pump is installed on the top right side of the annular storage tank, and a second suction pipe is provided between the recovery suction pump and the material cylinder.

[0022] Preferably, a second feeding pipe is provided between the recovery suction pump and the annular storage tank, and an auxiliary gas pipe is provided on the left side of the material cylinder, penetrating the desulfurization tower and exposed on the outside.

[0023] Preferably, the annular storage box is an annular cavity, and its interior is divided into a clean chamber and a regeneration chamber. A semi-circular cam is provided inside the regeneration chamber, and a heating rod is embedded inside the semi-circular cam. The end of the semi-circular cam forms a stepped difference with the bottom of the clean chamber.

[0024] Preferably, the top of the annular storage tank is provided with a shielding member that separates the clean chamber and the regeneration chamber, the shielding member comprising:

[0025] A vertical stop plate located at the end of the semi-circular cam;

[0026] A lifting cylinder is installed on the upper surface of the annular storage box, and a connecting plate is provided between the piston rod inside the lifting cylinder and the upper end of the baffle plate.

[0027] Preferably, the regeneration chamber is provided with a regeneration feeding mechanism for feeding the recycled filler material, the regeneration feeding mechanism comprising:

[0028] A semi-circular sliding hole is opened on the side of the annular storage box, and the semi-circular sliding hole communicates with the regeneration chamber;

[0029] A shielding ring is fitted onto the outside of the annular storage box, and the shielding ring blocks the semi-circular sliding hole;

[0030] A feeding rod located inside the regeneration chamber to feed the filler material;

[0031] And a traveling material-pushing component that drives the material-pushing rod to move.

[0032] Preferably, the walking material-feeding component includes:

[0033] A semi-circular toothed ring fixed to the right side of the annular storage box;

[0034] The sliding slider is located in the semi-circular sliding hole, and the shielding ring is connected to the sliding slider;

[0035] A walking motor is mounted on the walking slider, and the inner end of the walking motor is provided with a walking gear that cooperates with a semi-circular gear ring. The material feeding rod is connected to the walking slider.

[0036] A process for purifying and regenerating biogas for wastewater treatment plants.

[0037] S1. The biogas produced by sewage treatment is pretreated to separate particulate matter, and the treated biogas is sent into the desulfurization tower through the air inlet for purification treatment from bottom to top.

[0038] S2. The biogas entering the desulfurization tower passes through the packing Raschig ring for desulfurization and purification. The purified biogas then passes through the exhaust port into the next process for further treatment.

[0039] In S3 and S2, the Raschig rings of the packing material become saturated after the reaction, allowing the recovery component to recover the saturated packing material. At the same time, the feeding component evenly distributes the clean packing material from the annular storage box into the Raschig rings of the packing material. During this process, the biogas is always in a state of circulation and purification.

[0040] S4. The recovered packing material is regenerated in an annular storage tank. The regenerated packing material is then replenished into the packing Raschig rings by the fabric components, without affecting the continuous purification reaction of biogas.

[0041] Compared with the prior art, the beneficial effects of the present invention are:

[0042] (1) The present invention can replace and replenish the packing material in the packing Raschig ring without stopping the biogas transportation, ensuring that the biogas is always desulfurized and purified, and can regenerate the packing material without stopping the biogas production. This facilitates the reuse of the packing material for biogas desulfurization, reduces downtime costs, and improves the efficiency of biogas desulfurization and purification.

[0043] (2) By providing a shielding component, the present invention can easily divide the annular storage box into two chambers, which can not only realize the regeneration of saturated filler, but also facilitate the entry of the processed filler into the clean chamber, without mixing, and facilitate the recycling of filler, thus realizing the continuous desulfurization and purification of biogas.

[0044] (3) The present invention has a regeneration feeding mechanism that can move the regenerated filling material, so that the filling material can fully contact the gas and the heated semi-circular cam, allowing the filling material to be fully regenerated. The feeding force also makes it easy for the regenerated filling material to fall along the inclined surface of the semi-circular cam into the clean chamber for collection and use. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the biogas purification and desulfurization tower of the present invention;

[0046] Figure 2 For the present invention Figure 1 A schematic diagram of the structure for replacing the purification structure in the middle section;

[0047] Figure 3 For the present invention Figure 1 A longitudinal sectional view of the purification structure and desulfurization tower in the middle.

[0048] Figure 4 For the present invention Figure 3 A schematic diagram of the structure of the recycled components;

[0049] Figure 5 For the present invention Figure 4 Enlarged view of region A in the middle;

[0050] Figure 6 For the present invention Figure 2 Longitudinal sectional view of the central ring storage tank;

[0051] Figure 7 For the present invention Figure 2 A cross-sectional view of the central ring-shaped storage tank;

[0052] Figure 8 For the present invention Figure 7 Right view structural schematic diagram of the material feeding component in the middle walking direction;

[0053] Figure 9 For the present invention Figure 8 Enlarged view of region B in the middle;

[0054] In the diagram: 100, Desulfurization tower; 101, Exhaust port; 102, Inlet; 103, Centrifuge; 104, Collection hood; 200, Replacement purification structure; 201, Annular storage tank; 2011, Clean chamber; 2012, Regeneration chamber; 2013, Heating rod; 2014, Semi-circular cam; 202, Fabric feeding component; 2021, Fabric suction pump; 2022, First feed pipe; 2023, First suction pipe; 2024, Annular gear ring; 2025, Annular rail; 2026, Drive motor housing; 2027, Guide slide; 2028, Drive gear; 2029, Support plate; 20210, Drive cylinder; 20211, Fabric feeding pipe; 20212, Fabric feeding nozzle; 20213, Support frame; 203, Packing Raschig ring; 204 2041. Recycling component; 2042. Corrugated pipe; 2043. Feed hood; 2044. Material cylinder; 2045. Auxiliary air pipe; 2046. Second suction pipe; 2047. Recycling suction pump; 2058. Second feeding pipe; 2059. Blocking component; 2051. Baffle plate; 2052. Connecting plate; 2053. Lifting cylinder; 2060. Recycling feeding mechanism; 2061. Blocking ring; 2062. Semi-circular sliding hole; 2063. Walking feeding component; 20631. Semi-circular gear ring; 20632. Walking motor; 20633. Walking gear; 20634. Walking slider; 2064. Feeding rod; 20641. Fixed rod; 20642. Extension plate; 20643. Rotating feeding plate; 20644. Fixed lug; 20645. Movable pipe. Detailed Implementation

[0055] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0056] Please see Figure 1 - Figure 5 This application provides a biogas purification and regeneration device and process for wastewater treatment plants, including:

[0057] The desulfurization tower 100 has an air inlet 102 at the bottom for biogas to enter and an exhaust port 101 at the top. Inside the desulfurization tower 100, there is a collection hood 104 and a centrifuge 103 located above the packing Raschig ring 203. The collection hood 104 serves to guide condensation and remove moisture, while the centrifuge 103 separates the biogas into liquid.

[0058] The replacement and purification structure 200 installed inside the desulfurization tower 100 allows for the replacement and replenishment of the packing material in the Raschig rings 203 without stopping biogas delivery. This ensures continuous desulfurization and purification of biogas without interrupting biogas production, enabling the regeneration of the packing material. This facilitates the reuse of the packing material for biogas desulfurization, reduces downtime costs, and improves biogas desulfurization and purification efficiency. The replacement and purification structure 200 includes:

[0059] The annular storage box 201, which is installed outside the desulfurization tower 100 to store the packing material, is located outside the desulfurization tower 100 and does not affect the internal desulfurization and purification treatment of biogas.

[0060] The packing material Raschig ring 203 is embedded inside the desulfurization tower 100. The packing material Raschig ring 203 is filled with a packing material that reacts with biogas desulfurization, including but not limited to iron oxide.

[0061] Recovery component 204 for recovering saturated packing material inside packing Raschig ring 203;

[0062] And a feeding member 202 that feeds new filler material from above the filler Raschig ring 203.

[0063] In this embodiment, preferably, the fabric component 202 for replenishing the filler Raschig ring 203 includes:

[0064] An annular toothed ring 2024 is fixed to the inner wall of the desulfurization tower 100. An annular rail 2025 located below the annular toothed ring 2024 is provided on the inner wall of the desulfurization tower 100. The annular rail 2025 is T-shaped and slides with the guide slide 2027 but is not easy to detach laterally.

[0065] A fabric suction pump 2021 is installed on the annular storage box 201. The fabric suction pump 2021 sucks the filler material in the clean chamber 2011. The fabric suction pump 2021 is used to suck the filler material inside the annular storage box 201 and supply it to the fabric nozzle 20212.

[0066] A guide slide 2027 is fitted on the annular rail 2025. A drive motor housing 2026 is provided on the guide slide 2027. The drive motor housing 2026 includes a housing and a motor. The housing protects the motor. A drive gear 2028 that meshes with the annular gear ring 2024 is provided on the top of the drive motor housing 2026. The drive gear 2028 meshes with the annular gear ring 2024.

[0067] The support frame 20213 supports the fabric nozzle 20212. The support frame 20213 and the guide slide 2027 move synchronously. The synchronous movement facilitates the fabric nozzle 20212 to uniformly replenish the filler Raschig ring 203 with new filler material.

[0068] In this embodiment, preferably, the fabric suction pump 2021 is provided with a first feeding pipe 2022, and a fabric pipe 20211 is provided between the first feeding pipe 2022 and the fabric nozzle 20212. The unfolded length of the fabric pipe 20211 allows the guide slide 2027 to move one revolution without affecting the internal material conveying. The fabric pipe 20211 can be a flexible hose, which does not affect the internal material flow and is convenient to adapt to the movement of the fabric nozzle 20212. The guide slide 2027 is provided with a support plate 2029, and a drive cylinder 20210 is embedded inside the support plate 2029. The drive cylinder 20210 is also a combination of an outer shell and an inner cylinder. The outer shell protects the inner cylinder. One end of the drive cylinder 20210 is connected to the support frame 20213, and the piston rod inside the drive cylinder 20210 is connected to the support frame 20213.

[0069] In this embodiment, preferably, an annular frame is provided on the outside of the Raschig ring 203, and the recovery component 204 for recovering the saturated packing material inside the Raschig ring 203 includes:

[0070] The corrugated pipe 2041 installed at the bottom of the annular frame can be used when the discharge hood 2042 moves downward. The edge of the discharge hood 2042 and the inner wall of the desulfurization tower 100 are provided with a descending cylinder with the same structure as the drive cylinder 20210. The descending cylinders are vertically distributed. A short section of hose is provided between the two sides of the material cylinder 2043 and the auxiliary gas pipe 2044 and the second suction pipe 2045 respectively. The hose is located inside the desulfurization tower 100. The hose has the same structure as the material distribution pipe 20211, which is convenient to adapt to the subsequent downward movement of the discharge hood 2042 a short distance, and surrounds the space between the discharge hood 2042 and the packing Raschig ring 203 to prevent the packing material from leaking outward.

[0071] The discharge hood 2042 is installed at the bottom of the corrugated pipe 2041. The discharge hood 2042 is a mesh cover with small holes evenly opened on its surface for biogas to pass through, but it does not allow the filler to pass through. The cone-shaped end of the discharge hood 2042 is equipped with a material cylinder 2043 and a material valve.

[0072] A recovery suction pump 2046 is installed on the top right side of the annular storage tank 201, and a second suction pipe 2045 is provided between the recovery suction pump 2046 and the material cylinder 2043.

[0073] In this embodiment, preferably, a second feeding pipe 2047 is provided between the recovery suction pump 2046 and the annular storage tank 201. The second feeding pipe 2047 is connected to the regeneration chamber 2012. An auxiliary gas pipe 2044 is provided on the left side of the material cylinder 2043, penetrating the desulfurization tower 100 and exposed on the outside. The function of the auxiliary gas pipe 2044 is to facilitate the suction and delivery of the saturated packing material falling into the material cylinder 2043 into the regeneration chamber 2012, which is convenient for the suction of saturated packing material. The auxiliary gas pipe 2044 can be vented with air or other gases. An exhaust hole is provided at the top of the annular storage tank 201, and a filter screen is provided in the exhaust hole to facilitate the discharge of gas while the packing material remains in the regeneration chamber 2012.

[0074] In summary, biogas enters the desulfurization tower 100 and flows upwards, first passing through the feed hood 2042 and the Raschig ring packing 203. The biogas reacts with the packing material in the Raschig ring 203 to purify the biogas. The treated biogas continues to flow upwards, contacting the collection hood 104 for condensation, and then passes through the centrifuge 103 for gas-liquid separation. The separated biogas is then transported to the next process through the exhaust port 101. As the biogas continues to react with the Raschig ring packing 203, the packing material may become saturated due to the prolonged reaction time, affecting the purification and desulfurization effect. At this point, the lowering cylinder is activated, and the internal piston rod moves the feed hood 2042 downwards, causing the material cylinder 2043 to move downwards. The hose moves accordingly, resulting in a slight bend, but this does not affect the internal medium flow. As the space between the Raschig ring 2042 and the packing ring 203 gradually increases, the bellows 2041 expands, and the packing material inside the Raschig ring 203 falls onto the discharge hood 2042 due to gravity. Meanwhile, the upper part of the Raschig ring 203 gradually becomes empty, and the material suction pump 2021 operates, sucking the regenerated packing material from the clean chamber 2011 into the first feed pipe 2022 via the first suction pipe 2023, and then into the material distribution pipe 20211. Finally, the material is sprayed out through the material distribution nozzle 20212 into the empty gaps in the Raschig ring 203. Simultaneously, the motor in the drive motor housing 2026 operates, driving the drive gear 2028 to rotate. As it rotates, it meshes with the ring gear 2024, causing the guide slide 2027 to move along the ring track 2025, thereby... The fabric nozzle 20212 rotates once to evenly distribute material onto the annular Raschig ring 203, replenishing the filler. Simultaneously, the piston rod inside the drive cylinder 20210 moves the fabric nozzle 20212 outward, expanding the distribution area onto the Raschig ring 203. After the guide slide 2027 moves once, the drive motor housing 2026 reverses, causing the guide slide 2027 to move one revolution in the opposite direction along the annular track 2025 back to its original position, achieving uniform material distribution onto the Raschig ring 203. The saturated filler falls into the discharge hood 2042 and enters the feed cylinder 2043 through the opened feed valve until the saturated filler reaches the set capacity in the feed cylinder 2043, which is slightly more than the capacity after the saturated filler has completely filled the feed cylinder 2043. The saturated packing material is collected efficiently. After collection, the material valve closes, and the lowering cylinder operates again, causing the material lowering hood 2042 to move upward and reset. Meanwhile, the material distribution nozzle 20212 continues to distribute material onto the packing Raschig ring 203 until it is completely filled, meaning the reduction in packing material in the clean chamber 2011 is the same as the reduction in the packing Raschig ring 203. The recovery suction pump 2046 then operates, and the auxiliary gas pipe 2044 opens. The recovery suction pump 2046 draws the saturated packing material, carrying gas, from the material cylinder 2043 into the regeneration chamber 2012. Gas and the heating rod 2013 regenerate the saturated packing material. The regenerated packing material then enters the clean chamber 2011 for easy re-suction by the material distribution component 202. Throughout this process, biogas delivery is not interrupted. During replacement...It can consistently perform desulfurization and purification of biogas, improving biogas purification efficiency. Example 2

[0075] Reference Figure 6 This is the second embodiment of the present invention.

[0076] In this embodiment, preferably, the annular storage box 201 is an annular cavity, and its interior is divided into a clean chamber 2011 and a regeneration chamber 2012. A semi-circular cam 2014 is provided inside the regeneration chamber 2012. The two ends of the semi-circular cam 2014 are lower, while the middle position is higher. The interior of the semi-circular cam 2014 is hollow, and a heating rod 2013 is provided inside the semi-circular cam 2014 to heat the semi-circular cam 2014, which facilitates the heating and regeneration of the filler material falling on the semi-circular cam 2014. The heating rod 2013 is embedded inside the semi-circular cam 2014. The end of the semi-circular cam 2014 forms a step difference with the bottom of the clean chamber 2011, which facilitates the filler material on the semi-circular cam 2014 to fall into the clean chamber 2011 along its inclined surface.

[0077] In this embodiment, preferably, the top of the annular storage tank 201 is provided with a shielding member 205 that separates the clean chamber 2011 and the regeneration chamber 2012. By providing the shielding member 205, the annular storage tank 201 is conveniently divided into two chambers, which allows for the regeneration of saturated packing material and facilitates the entry of the processed packing material into the clean chamber 2011, preventing mixing and facilitating the recycling of the packing material. This enables continuous desulfurization and purification of biogas. The shielding member 205 includes:

[0078] The baffle plate 2051 is vertically located at the end of the semi-circular cam 2014. The baffle plate 2051 completely separates the clean chamber 2011 and the regeneration chamber 2012, and also facilitates subsequent communication between the two.

[0079] A lifting cylinder 2053 is installed on the upper surface of the annular storage box 201. A connecting plate 2052 is provided between the piston rod inside the lifting cylinder 2053 and the upper end of the baffle plate 2051, which drives the baffle plate 2051 to move together.

[0080] In summary, during use, the lifting cylinder 2053 drives the connecting plate 2052 and the baffle plate 2051 to move downwards. The baffle plate 2051 separates the clean chamber 2011 and the regeneration chamber 2012. The clean chamber 2011 stores the regenerated filler, while the regeneration chamber 2012 processes the saturated filler. After the saturated filler has been regenerated, the lifting cylinder 2053 drives the baffle plate 2051 to move upwards, removing the obstruction. The clean chamber 2011 and the regeneration chamber 2012 are connected, and the filler falls into the clean chamber 2011 along the inclined surface of the semi-circular cam 2014, facilitating the subsequent replenishment of filler to the Raschig ring 203. Example 3

[0081] Reference Figure 7 - Figure 9 This is the third embodiment of the present invention.

[0082] In this embodiment, preferably, the regeneration chamber 2012 is provided with a regeneration feeding mechanism 206 for feeding the recovered filler material. By providing the regeneration feeding mechanism 206, the regenerated filler material can be moved, facilitating full contact between the filler material and the gas, and contact with the heated semi-circular cam 2014, allowing for thorough regeneration. The feeding force also facilitates the regenerated filler material falling along the inclined surface of the semi-circular cam 2014 into the clean chamber 2011 for collection and use. The regeneration feeding mechanism 206 includes:

[0083] A semi-circular sliding hole 2062 is opened on the side of the annular storage box 201, and the semi-circular sliding hole 2062 communicates with the regeneration chamber 2012;

[0084] A shielding ring 2061 is fitted on the outside of the annular storage box 201. The shielding ring 2061 shields the semi-circular sliding hole 2062, which facilitates the leakage prevention function of the regeneration chamber 2012.

[0085] A feeding rod 2064 located inside the regeneration chamber 2012 for feeding the filler material;

[0086] And a traveling material-pushing component 2063 that drives the material-pushing rod 2064 to move.

[0087] In this embodiment, preferably, the material-pulling rod 2064 includes an extension plate 20642 fixed to the inner surface of the walking slider 20634. A fixing rod 20641 is provided on the lower surface of the extension plate 20642. A movable tube 20645 is movably sleeved on the outside of the fixing rod 20641. The lower end of the movable tube 20645 is spherical to facilitate contact with the upper surface of the semi-circular cam 2014. Fixing lugs 20644 are provided on both sides of the lower end of the movable tube 20645. The fixing lugs 20644 are rotatably connected to the rotating material-pulling plate 20643. The shape and size of the rotating material-pulling plate 20643 can be set according to actual needs.

[0088] In this embodiment, preferably, the walking material-shifting component 2063 includes:

[0089] A semi-circular toothed ring 20631 fixed on the right side of the annular storage box 201;

[0090] The sliding slider 20634 located in the semi-circular sliding hole 2062 slides. The sliding slider 20634 can be T-shaped. The shielding ring 2061 is connected to the sliding slider 20634 and can rotate as the sliding slider 20634 moves, always covering and shielding the semi-circular sliding hole 2062.

[0091] The walking motor 20632 is installed on the walking slider 20634, and the two can be connected synchronously. The walking slider 20634 cooperates with the semi-circular sliding hole 2062 to limit the movement of the walking motor 20632. The inner end of the walking motor 20632 is provided with a walking gear 20633 that cooperates with the semi-circular gear ring 20631. The material pusher 2064 is connected to the walking slider 20634.

[0092] In summary, during operation, the travel motor 20632 operates, driving the travel gear 20633. The travel gear 20633 meshes with the semi-circular gear ring 20631, causing the travel gear 20633, travel motor 20632, and travel slider 20634 to slide backward along the semi-circular sliding hole 2062. When the material-pulling rod 2064 moves to a higher position with the travel motor 20632, the movable tube 20645 moves upward, rotating the angle of the material-pulling plate 20643 to match the inclined surface of the semi-circular cam 2014. When the material-pulling rod 2064 moves to a lower position on the semi-circular cam 2014, the movable tube 20645 moves downward due to gravity until its lower end contacts the surface of the semi-circular cam 2014. Simultaneously, the rotating material feeding plate 20643 rotates downwards, with its end contacting the surface of the semi-circular cam 2014. During this process, the rotating material feeding plate 20643 continuously feeds the saturated filler material falling on the semi-circular cam 2014. When the walking motor 20632 slides forward, it drives the material feeding rod 2064 to move forward and feed the material. Throughout the entire process, the material feeding is continuously fed, facilitating the tumbling of the filler material and its contact with the heated semi-circular cam 2014 and the ventilated gas for regeneration. After regeneration, the walking motor 20632 drives the material feeding rod 2064 to continue moving, feeding the filler material towards the end of the semi-circular cam 2014, facilitating the rapid falling of the filler material into the clean chamber 2011. Example 4

[0093] The apparatuses from Examples 1, 2, and 3 are combined to obtain the biogas purification and regeneration process for wastewater treatment plants described in this example.

[0094] S1. The biogas generated from sewage treatment is pretreated to separate particulate matter, and the treated biogas is sent into the desulfurization tower 100 through the air inlet 102 for purification treatment from bottom to top.

[0095] S2. The biogas entering the desulfurization tower 100 passes through the packing Raschig ring 203 for desulfurization and purification. The purified biogas is processed by the collection hood 104 and centrifuge 103 and then passes through the exhaust port 101 to enter the next process for further processing.

[0096] In S3 and S2, the Raschig ring 203 packing material is saturated after the reaction, allowing the recovery component 204 to recover the saturated packing material. At the same time, the feeding component 202 evenly distributes the clean packing material in the annular storage box 201 into the Raschig ring 203 packing material. During this process, the biogas is always in a circulating and purified state.

[0097] S4. The recovered packing material is regenerated in the annular storage tank 201. The regenerated packing material is then replenished into the packing Raschig ring 203 by the fabric component 202, without affecting the continuous purification reaction of biogas.

[0098] The principles not mentioned in detail in this application are existing technologies and will not be elaborated here, such as the forward and reverse rotation of the motor.

[0099] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

1. A biogas purification and regeneration device for wastewater treatment plants, characterized in that, include: A desulfurization tower (100) is provided with an air inlet (102) at the bottom for biogas to enter. A replacement purification structure (200) installed inside the desulfurization tower (100), the replacement purification structure (200) comprising: An annular storage tank (201) is installed outside the desulfurization tower (100) to store the packing material. Raschig rings (203) are embedded inside the desulfurization tower (100). Recovery component (204) for recovering saturated packing material inside the packing Raschig ring (203); And a fabrication component (202) that distributes new filler material from above the filler Raschig ring (203); The fabric feeding component (202) for replenishing the packing Raschig ring (203) includes: an annular toothed ring (2024) fixed to the inner wall of the desulfurization tower (100), wherein the inner wall of the desulfurization tower (100) is provided with an annular rail (2025) located below the annular toothed ring (2024); and a fabric suction pump (2021) installed on the annular storage tank (201), wherein the fabric suction pump (2021) is used to suction the packing material inside the annular storage tank (201) and supply it to the fabric. Nozzle (20212); guide slide (2027) sleeved on an annular rail (2025), wherein a drive motor housing (2026) is provided on the guide slide (2027), and a drive gear (2028) cooperating with an annular gear ring (2024) is provided on the top of the drive motor housing (2026); support frame (20213) supporting the fabric nozzle (20212), wherein the support frame (20213) moves synchronously with the guide slide (2027); The fabric suction pump (2021) is provided with a first feeding pipe (2022), and a fabric pipe (20211) is provided between the first feeding pipe (2022) and the fabric nozzle (20212). The guide slide (2027) is provided with a support plate (2029), and a drive cylinder (20210) is embedded inside the support plate (2029). One end of the drive cylinder (20210) is connected to the support frame (20213). An annular frame is provided on the outside of the Raschig ring (203). The recovery component (204) for recovering the saturated packing material inside the Raschig ring (203) includes: a bellows (2041) installed at the bottom of the annular frame; a discharge hood (2042) installed at the bottom of the bellows (2041), wherein a material cylinder (2043) is provided at the conical end of the discharge hood (2042); and a recovery suction pump (2046) installed at the top right side of the annular storage tank (201), wherein a second suction pipe (2045) is provided between the recovery suction pump (2046) and the material cylinder (2043).

2. The biogas purification and regeneration device for wastewater treatment plants according to claim 1, characterized in that, A second feeding pipe (2047) is provided between the recovery suction pump (2046) and the annular storage tank (201), and an auxiliary gas pipe (2044) is provided on the left side of the material cylinder (2043) that penetrates the desulfurization tower (100) and protrudes to the outside.

3. The biogas purification and regeneration device for wastewater treatment plants according to claim 1, characterized in that, The annular storage box (201) is an annular cavity, and its interior is divided into a clean chamber (2011) and a regeneration chamber (2012). A semi-circular cam (2014) is provided inside the regeneration chamber (2012), and a heating rod (2013) is embedded inside the semi-circular cam (2014). The end of the semi-circular cam (2014) and the bottom of the clean chamber (2011) form a stepped difference.

4. A biogas purification and regeneration device for wastewater treatment plants according to claim 3, characterized in that, The annular storage tank (201) is provided with a shielding member (205) at the top, which separates the clean chamber (2011) and the regeneration chamber (2012). The shielding member (205) includes: A baffle plate (2051) is located vertically at the end of the semi-circular cam (2014). A lifting cylinder (2053) is installed on the upper surface of the annular storage box (201). A connecting plate (2052) is provided between the piston rod inside the lifting cylinder (2053) and the upper end of the baffle plate (2051).

5. A biogas purification and regeneration device for wastewater treatment plants according to claim 4, characterized in that, The regeneration chamber (2012) is equipped with a regeneration feeding mechanism (206) for feeding the recycled filler material. The regeneration feeding mechanism (206) includes: A semi-circular sliding hole (2062) is opened on the side of the annular storage box (201), and the semi-circular sliding hole (2062) communicates with the regeneration chamber (2012); A shielding ring (2061) is fitted on the outside of the annular storage box (201), and the shielding ring (2061) shields the semi-circular sliding hole (2062); A feeding rod (2064) located inside the regeneration chamber (2012) for feeding the filler material. And a traveling material-pushing component (2063) that drives the material-pushing rod (2064) to move.

6. A biogas purification and regeneration device for wastewater treatment plants according to claim 5, characterized in that, The walking material-feeding component (2063) includes: A semi-circular toothed ring (20631) fixed on the right side of the annular storage box (201). The sliding slider (20634) located in the semi-circular sliding hole (2062) is connected to the sliding slider (20634); A walking motor (20632) is installed on the walking slider (20634). The inner end of the walking motor (20632) is provided with a walking gear (20633) that cooperates with the semi-circular gear ring (20631). The material-pulling rod (2064) is connected to the walking slider (20634).

7. A biogas purification and regeneration process for wastewater treatment plants, employing a biogas purification and regeneration device for wastewater treatment plants as described in any one of claims 1-6, characterized in that, S1. The biogas generated from sewage treatment is pretreated to separate particulate matter, and the treated biogas is sent into the desulfurization tower (100) through the air inlet (102) to purify the biogas from bottom to top. S2. The biogas entering the desulfurization tower (100) passes through the packing Raschig ring (203) for desulfurization and purification. The purified biogas passes through the exhaust port (101) and enters the next process for further processing. In S3 and S2, the Raschig ring (203) of the packing material is saturated by the reaction, which allows the recovery component (204) to recover the saturated packing material. At the same time, the feeding component (202) evenly distributes the clean packing material in the annular storage box (201) into the Raschig ring (203). During this process, the biogas is always in a circulating and purified state. S4. The recovered filler is regenerated in the annular storage tank (201). The regenerated filler is subsequently replenished into the filler Raschig ring (203) by the fabric component (202), without affecting the continuous purification reaction of biogas.

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