A sewage treatment plant biogas desulfurization treatment device and treatment method

Abstract

The present application relates to sewage treatment plant energy recycling technical field, specifically, it relates to a kind of sewage treatment plant methane gas desulfurization treatment device and processing method, it includes desulfurization tank body, spray system is arranged in desulfurization tank body: the top of spray system in desulfurization tank body is provided with the flow guide assembly for the desulfurized methane gas is again backflow, mixing system is arranged in the bottom of spray system in desulfurization tank body for increasing the length of stay of methane gas in desulfurization tank body;The present application is improved by setting flow guide assembly, optimizing spray structure and introducing the mixing system with multistage buffering and homogenization function, from gas-liquid contact mode, methane gas flow path, medicament distribution form and multiple aspects of cooperation improvement, effectively solve the key technical bottleneck that methane gas stays short, contact is not sufficient etc. in prior art, significantly improve desulfurization efficiency and operating stability.

Description

Technical Field

[0001] This invention relates to the field of energy reuse technology in wastewater treatment plants, and more specifically, to a biogas desulfurization treatment device and treatment method for wastewater treatment plants. Background Technology

[0002] Wastewater treatment plants generate large amounts of sludge during wastewater treatment. This sludge can produce biogas through anaerobic digestion. This biogas mainly consists of methane (CH4) and carbon dioxide (CO2), and also contains small amounts of impurities such as hydrogen sulfide (H2S). Effectively recovering and utilizing this biogas not only helps reduce greenhouse gas emissions but also provides energy support for wastewater treatment plants.

[0003] For wet desulfurization devices used in biogas production, the common method is to spray absorbent liquid inside the desulfurization tower, allowing the absorbent to fully contact and react with the hydrogen sulfide in the biogas, thereby achieving desulfurization. However, in actual operation, problems such as insufficient biogas residence time and inadequate gas-liquid two-phase contact still exist within the desulfurization tower. This not only limits the hydrogen sulfide removal efficiency but also affects the stability of the overall desulfurization effect, becoming one of the key bottlenecks restricting the further promotion and application of wet desulfurization technology.

[0004] Based on this, the present invention discloses a biogas desulfurization treatment device for sewage treatment plants. Summary of the Invention

[0005] To address the problems of insufficient biogas residence time and inadequate gas-liquid contact commonly found in biogas wet desulfurization devices in the background art, which affect desulfurization efficiency and stability, this invention provides a biogas desulfurization treatment device and method for wastewater treatment plants. The device includes a desulfurization tank, an inlet pipe near the bottom of the tank, an outlet pipe near the top, a spray system inside the tank, a flow guide component at the top of the spray system for recirculating the desulfurized biogas, and a mixing system at the bottom of the spray system to increase the residence time of the biogas within the tank.

[0006] Traditional sprinkler systems, although using a matrix layout, still produce a diffuse spray. In order to improve the accuracy and contact area of ​​the next step with biogas;

[0007] As a further improvement to this technical solution, the spraying system includes a matrix spraying device, and a baffle is fixedly installed directly below the matrix spraying device inside the desulfurization tank. The baffle has several rings of air holes arranged in a circumferential array.

[0008] Based on this, due to insufficient residence time and uneven mixing during the mixing and contact process of biogas with desulfurization spray, the contact area is small, which affects the desulfurization effect;

[0009] As a further improvement to this technical solution, the mixing system includes an installation plate fixed near the bottom of the desulfurization tank. Several mixing rings are arranged sequentially from the center to the edge on the installation plate. Each mixing ring includes several buffer components that fit together in a circular array. Each buffer component includes a buffer tube. Several rotating disks are arranged sequentially from bottom to top on the buffer tube. The rotating disks decrease in size from bottom to top and rotate continuously as biogas enters. A diversion groove is opened on the side of the buffer tube at the position of the rotating disk. Adjacent buffer tubes are connected to each other through the diversion groove.

[0010] As a further improvement to this technical solution, the present invention uses a two-stage buffer disk as an example, see [link to relevant documentation]. Figures 6-8 As shown, the buffer tube is arranged with a second rotating disk and a first rotating disk rotating sequentially from bottom to top. The diameter of the second rotating disk is smaller than that of the first rotating disk, and the rotation directions of the second rotating disk and the first rotating disk are perpendicular to each other. The surfaces of the second rotating disk and the first rotating disk are provided with a plurality of guide grooves. The buffer tube is provided with arc-shaped second guide grooves on both sides along the rotation direction of the second rotating disk, and the buffer tube is provided with arc-shaped first guide grooves on both sides along the rotation direction of the first rotating disk.

[0011] In another scheme, since the spray from the matrix spraying device will fall onto the mounting plate, in order to ensure that the agent near the mounting plate can also come into contact with the biogas in the buffer pipe;

[0012] As a further improvement to this technical solution, the intersection of the tops of the plurality of buffer tubes on the mounting plate is provided with a protruding structure, and a liquid guiding ring is fixed on the top of the buffer tube. The top of the liquid guiding ring is smoothly connected to the protrusion of the mounting plate, and the liquid guiding ring has an inward concave structure.

[0013] In another scheme, in order to make the biogas more evenly and precisely collide with the gas holes on the baffle plate, thereby increasing the contact area and reaction efficiency.

[0014] As a further improvement to this technical solution, a spiral structure second guide plate is provided at the top of the buffer tube. The rotation angles of the corresponding second guide plates on each turn of the buffer tube are connected to each other, and several turns of the second guide plates form several corresponding airflow rings. Moreover, the rotation direction of the rotating disk and the opening direction of the flow channel in each turn of the buffer tube are adapted to the rotation direction of the corresponding second guide plate on each turn of the buffer tube.

[0015] A treatment method for a biogas desulfurization treatment device in a wastewater treatment plant includes the following steps:

[0016] Step 1: Biogas is introduced into the desulfurization tank through the gas inlet pipe. The biogas first enters through the bottom of the buffer pipe. Under the high pressure of the biogas, it first blows the second rotating disk to rotate. Then, through the second diversion grooves on both sides of the rotation direction of the second rotating disk, the biogas is introduced into the adjacent buffer pipes. Due to the pressure difference, the biogas is gradually divided into the first stage. Then, the biogas enters the vicinity of the first rotating disk in the buffer pipe, driving the first rotating disk to rotate.

[0017] Similarly, the rotation of the first rotating disc gradually guides the biogas through the first diversion channel to the adjacent buffer pipe, and then distributes it evenly in the second stage, so that the biogas is evenly distributed.

[0018] Step 2: After the spray from the matrix spray device passes through the air holes on the baffle, the spray is directed and sprayed directly through the air holes, forming a single contact.

[0019] When the agent sprayed by the matrix spraying device gathers on the mounting plate, which is the intersection of several buffer tubes, it is guided to the top of the buffer tube through the protruding structure, and then guided to the center of the buffer tube through the liquid guiding ring. With the help of the rotation of the first rotating plate, it is further brought into contact with biogas.

[0020] Step 3: Through the cooperation of the second guide plate, buffer pipe, corresponding rotating disk and diversion channel, the biogas and spray mixture is pushed out again through the buffer pipe. The multiple sets of second guide plates guide the flow to form several airflow rings, which then form efficient collision contact with the several rings of air holes of the corresponding baffle.

[0021] Step 4: After the biogas has been desulfurized, it passes through the matrix spray device and impacts the bottom of the first guide plate. Under the guiding effect of the horizontal V-shaped structure of the first guide plate, the biogas gradually increases its flow speed and flows downwards, producing a backflow effect, and comes into contact with the spray again to improve the desulfurization effect.

[0022] Step 5: Finally, the biogas flows out through the gas outlet pipe to complete the subsequent actions.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. This biogas desulfurization treatment device for a wastewater treatment plant improves gas-liquid contact efficiency and uniformity. Through the coordination of a matrix spray device and a baffle plate, the spray is directed and directly injected through the air holes on the baffle plate, improving the initial contact accuracy and coverage area between the spray and biogas. Simultaneously, a mixing system (including an mounting plate and several mixing rings) is installed at the bottom of the desulfurization tank. The design of the buffer pipe and rotating disc drives the rotating disc to rotate with the biogas flow, gradually buffering the impact of the biogas and achieving uniform gas distribution. Furthermore, the guide grooves on the surface of the rotating disc not only further guide the biogas flow but also promote the atomization and diffusion of liquid agents, thereby enhancing the effective contact area and reaction rate between the agents and biogas. These measures work together to significantly improve the efficiency and uniformity of gas-liquid contact.

[0025] 2. In this biogas desulfurization treatment device for a wastewater treatment plant, the biogas residence time is extended and reaction opportunities are increased: A flow guiding component (a horizontally placed V-shaped first flow guiding plate) is installed at the top of the desulfurization tank to guide and reflux the desulfurized biogas in multiple stages, effectively extending the residence time of the biogas in the desulfurization tank and promoting some of the biogas to come into contact with the sprayed agent again. In addition, by opening a diversion channel on the buffer pipe and combining it with the rotation direction design of the rotating disk, it is beneficial to guide the biogas between multiple buffer pipes to form a continuous circulation path, increasing the interaction frequency between biogas and the agent, providing more reaction opportunities, and further enhancing the desulfurization effect.

[0026] 3. This biogas desulfurization treatment device for wastewater treatment plants achieves efficient resource utilization and reduces waste: By combining a liquid guiding ring at the top of the buffer pipe with the raised structure of the mounting plate, the liquid reagent retained on the mounting plate is guided into the buffer pipe, realizing the reuse and efficient dispersion of the reagent and reducing waste. Furthermore, the multi-stage rotating disc design (with decreasing diameter from bottom to top) buffers and guides biogas flow in stages, compensating for the shortcomings of single-stage treatment, improving the adaptability and stability of the overall desulfurization system, and enabling more efficient resource utilization. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a cross-sectional view of the desulfurization tank of the present invention;

[0029] Figure 3 This is a schematic diagram of the internal structure of the desulfurization tank of the present invention;

[0030] Figure 4 This is a top view of the structure of the buffer assembly of the present invention;

[0031] Figure 5 This is a top view of the mounting disk of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the buffer component of the present invention;

[0033] Figure 7 This is one of the structural cross-sectional views of the buffer tube of the present invention;

[0034] Figure 8 This is a second cross-sectional view of the buffer tube of the present invention.

[0035] The meanings of the labels in the diagram are as follows:

[0036] 1. Desulfurization tank; 2. Inlet pipe; 3. Outlet pipe; 4. Matrix spray device; 5. Baffle plate; 6. First guide plate; 7. Mounting plate; 8. Buffer assembly; 9. Second guide plate; 10. Airflow ring;

[0037] 81. Buffer tube; 82. First rotating disk; 83. First drainage channel; 85. Second rotating disk; 86. Second drainage channel; 87. Liquid guiding ring. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0039] Existing biogas wet desulfurization devices generally suffer from insufficient biogas residence time and inadequate gas-liquid contact within the desulfurization tower, affecting desulfurization efficiency and stability.

[0040] Therefore, this invention provides a biogas desulfurization treatment device and method for wastewater treatment plants. See [link to related document]. Figures 1-3 As shown, it includes a desulfurization tank 1, an inlet pipe 2 near the bottom of the desulfurization tank 1, an outlet pipe 3 near the top of the desulfurization tank 1, a spray system inside the desulfurization tank 1, a flow guide component for recirculating the desulfurized biogas at the top of the spray system inside the desulfurization tank 1, and a mixing system for increasing the residence time of biogas inside the desulfurization tank 1 at the bottom of the spray system.

[0041] During operation, biogas is introduced into the desulfurization tank 1 through the inlet pipe 2. The spraying system then sprays the chemical agent towards the bottom of the desulfurization tank 1. The biogas entering through the inlet pipe 2 at the bottom is then slowed down by the mixing system, which increases the contact area between the biogas and the spray from the spraying system, thereby improving the desulfurization efficiency. After desulfurization, the biogas rises further and passes through the top guide component, allowing some of the biogas to flow back and mix with the spray for further desulfurization, further improving the desulfurization effect. Finally, the biogas flows out through the outlet pipe 3 for recycling, realizing the reuse of energy.

[0042] For details, see Figure 3 As shown, although the traditional spray system adopts a matrix layout, the sprayed mist is still in a diffuse state. In order to improve the accuracy and contact area of ​​the next step of contact with biogas, the present invention adopts a spray system including a matrix spray device 4. A baffle 5 is fixedly installed directly below the matrix spray device 4 inside the desulfurization tank 1. Several rings of air holes are opened on the baffle 5 in a circumferential array.

[0043] During operation, the spray from the matrix spray device 4 passes through the air holes on the baffle plate 5, allowing the spray to be directed and sprayed directly through the air holes, paving the way for the subsequent mixing system.

[0044] Further, see Figures 3-8 As shown, due to insufficient residence time and uneven mixing during the mixing and contact of biogas with desulfurization spray, the contact area is small, affecting the desulfurization effect. Therefore, the present invention adopts a mixing system including an installation plate 7 fixed near the bottom of the desulfurization tank 1. The installation plate 7 has several mixing rings arranged sequentially from the center to the edge. The mixing rings include several buffer components 8 that are closely attached to each other and arranged in a circumferential array. The buffer components 8 include buffer tubes 81. Several rotating disks are arranged sequentially from bottom to top on the buffer tubes 81. The rotating disks decrease in size from bottom to top. The rotating disks rotate continuously as biogas enters. A diversion groove is opened on the side of the buffer tube 81 at the position of the rotating disk. Adjacent buffer tubes 81 are interconnected through the diversion groove.

[0045] During operation, biogas enters through the bottom of buffer pipe 81. Under the high pressure of the biogas, it drives the rotating disc to rotate, which slows down the impact speed of the biogas. Secondly, the buffer pipe 81 is surrounded by diversion channels corresponding to the rotation direction of the rotating disc. Therefore, when the rotating disc rotates, the biogas is introduced into other buffer pipes 81 through the diversion channels. The multiple buffer pipes 81 are closely connected to each other, so that the distribution of biogas is as uniform as possible. This increases the evenness of contact between the spray entering or exiting the buffer pipe 81, preventing density gradients that could lead to insufficient or excessive contact in some areas. Furthermore, the diameter of the rotating disc decreases from bottom to top, which gradually increases the buffering effect on the biogas, allowing the biogas to be quickly distributed between the buffer pipes 81 through the rotating disc. The multi-stage rotating disc effectively increases the uniform distribution efficiency of biogas. The task of uniform distribution of biogas that the first-stage rotating disc could not complete is handled by the second-stage rotating disc, and so on, with the buffering force increasing step by step.

[0046] Specifically, this invention uses a two-stage buffer disk as an example, see [link to relevant documentation]. Figures 6-8 As shown, the buffer tube 81 is arranged with a second rotating disk 85 and a first rotating disk 82 rotating from bottom to top. The diameter of the second rotating disk 85 is smaller than the diameter of the first rotating disk 82, and the rotation directions of the second rotating disk 85 and the first rotating disk 82 are perpendicular to each other. The surfaces of the second rotating disk 85 and the first rotating disk 82 are provided with a number of guide grooves. The buffer tube 81 is provided with arc-shaped second guide grooves 86 on both sides along the rotation direction of the second rotating disk 85, and the buffer tube 81 is provided with arc-shaped first guide grooves 83 on both sides along the rotation direction of the first rotating disk 82.

[0047] During operation, the biogas first blows the second rotating disk 85 to rotate. Then, the biogas is introduced into the nearby buffer pipe 81 through the second diversion grooves 86 on both sides of the rotation direction of the second rotating disk 85. Due to the pressure difference, the biogas can be gradually distributed in the first stage. Then, the biogas enters the vicinity of the first rotating disk 82 in the buffer pipe 81, driving the first rotating disk 82 to rotate. Similarly, the rotation of the first rotating disk 82 gradually guides the biogas through the first diversion groove 83 into the nearby buffer pipe 81, and then distributes it in the second stage. In this process, the impact force and residence time of the biogas are gradually slowed down, and the biogas is distributed as evenly as possible. At the same time, the matrix spraying device 4 above also sprays downward through the air holes, which comes into contact with the corresponding several circles of evenly and slowly distributed biogas, achieving the desulfurization effect.

[0048] In addition, the guide grooves on the surfaces of the first rotating disk 82 and the second rotating disk 85 can also achieve a higher guiding effect, and if part of the spray is liquid, it can also accelerate the impact speed of the liquid agent with the buffer tube 81, allowing it to atomize and further improve the contact reaction with biogas.

[0049] Furthermore, since the spray from the matrix spraying device 4 will fall onto the mounting plate 7, in order to allow the agent near the mounting plate 7 to also come into contact with the biogas in the buffer pipe 81, the present invention adopts a raised structure at the intersection of the tops of several buffer pipes 81 on the mounting plate 7. A liquid guiding ring 87 is fixed on the top of the buffer pipe 81, and the top of the liquid guiding ring 87 is smoothly connected to the raised part of the mounting plate 7. The liquid guiding ring 87 has an inward concave structure.

[0050] During operation, if the agent sprayed by the matrix spraying device 4 accumulates on the mounting plate 7, which is the intersection of several buffer tubes 81, and if some of it is liquid, it will flow into the top of the buffer tube 81 through the protrusion, and then be guided to the center of the buffer tube 81 through the liquid guiding ring 87. With the help of the rotation of the first rotating plate 82, it will come into further contact with biogas.

[0051] For details, see Figures 3-5 As shown, in order to make the biogas more evenly and precisely collide with the gas holes on the baffle plate 5, thereby increasing the contact area and reaction efficiency, the present invention adopts a second guide plate 9 with a spiral structure at the top of the buffer tube 81. The rotation angle of the corresponding second guide plate 9 on each ring of the buffer tube 81 is connected to each other, and several rings of the second guide plate 9 form several corresponding airflow rings 10. Moreover, the rotation direction of the rotating disk in each ring of the buffer tube 81 and the opening direction of the diversion groove are adapted to the rotation direction of the corresponding second guide plate 9 on each ring of the buffer tube 81.

[0052] During work, through Figure 5 As can be seen from the dotted line, the design of the second guide plate 9, combined with the buffer pipe 81 and the corresponding rotating disk and diversion groove, allows the biogas and spray mixture to be sprayed out again through the buffer pipe 81. The second guide plate 9 guides the flow, forming several airflow rings 10, which then form efficient collision contact with the several rings of air holes on the corresponding baffle 5. The biogas in the airflow rings 10 is averaged, so this combination with several rings of collision further improves the contact efficiency and desulfurization effect.

[0053] In addition, in order to further enhance the contact reaction between the biogas flowing out of the matrix spraying device 4 and the sprayed agent, and to create a final barrier at the end stage to improve the desulfurization effect, the present invention adopts a flow guiding component including several first flow guiding plates 6 fixed in the desulfurization tank 1. The first flow guiding plates 6 have a horizontal V-shaped structure, and the included angle of the horizontal V-shaped structure of several first flow guiding plates 6 increases sequentially.

[0054] During operation, the desulfurized biogas passes through the matrix spray device 4 and impacts the bottom of the first guide plate 6. The horizontal V-shaped structure of the first guide plate 6 guides the flow, and the gradually increasing angle of the structure design gradually increases the flow speed and causes it to flow downwards, resulting in a partial backflow effect. This further contacts the spray and improves the desulfurization effect, while the remaining part gradually flows out through the channels between the first guide plates 6.

[0055] In summary, this invention addresses the problems of insufficient biogas residence time and inadequate gas-liquid contact in existing wet biogas desulfurization devices by optimizing the spray structure, introducing a mixing system with multi-stage buffering and homogenization functions, and setting up flow guiding components. These measures aim to improve gas-liquid contact efficiency and uniformity, extend biogas residence time and increase reaction opportunities, and achieve efficient resource utilization and reduce waste.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A biogas desulfurization treatment device for a wastewater treatment plant, comprising a desulfurization tank (1), wherein a spray system is provided inside the desulfurization tank (1); characterized in that: The desulfurization tank (1) is provided with an air inlet pipe (2) at the bottom and an air outlet pipe (3) at the top. A flow guide component is installed at the top of the spray system inside the desulfurization tank (1) to guide the desulfurized biogas back to the system. A mixing system is installed at the bottom of the spray system inside the desulfurization tank (1) to increase the residence time of biogas in the desulfurization tank (1); The mixing system includes an installation plate (7) fixed at the bottom of the desulfurization tank (1). Several mixing rings are arranged sequentially from the inside to the outside along the diameter of the installation plate (7). The mixing rings include several buffer components (8) that fit together and are arranged in a circular array. The buffer assembly (8) includes a buffer tube (81), and a number of rotating disks are arranged sequentially from bottom to top on the buffer tube (81). The number of coaxial rotating disks increase in size sequentially from bottom to top. The rotating disks rotate continuously as biogas enters. A diversion groove is provided on the side of the buffer tube (81) at the position of the corresponding rotating disk, and adjacent buffer tubes (81) are interconnected through the diversion groove.

2. The biogas desulfurization treatment device for a wastewater treatment plant according to claim 1, characterized in that: The spray system includes a matrix spray device (4), and a baffle (5) is fixedly installed inside the desulfurization tank (1) directly below the matrix spray device (4). The baffle (5) has several rings of air holes arranged in a circular array.

3. The biogas desulfurization treatment device for a sewage treatment plant according to claim 2, characterized in that: The buffer tube (81) is arranged with a second rotating disk (85) and a first rotating disk (82) rotating from bottom to top. The diameter of the second rotating disk (85) is smaller than the diameter of the first rotating disk (82). The diameters of the first rotating disk (82) and the second rotating disk (85) are both smaller than the inner diameter of the buffer tube (81).

4. The biogas desulfurization treatment device for a wastewater treatment plant according to claim 3, characterized in that: The first rotating disk (82) has a rotating shaft on both sides, and the second rotating disk (85) has a rotating shaft on both sides; the rotating shaft and the rotating shaft are perpendicular to each other, so that the rotation directions of the second rotating disk (85) and the first rotating disk (82) are perpendicular to each other; The surfaces of the second rotating disk (85) and the first rotating disk (82) are provided with a number of guide grooves.

5. The biogas desulfurization treatment device for a sewage treatment plant according to claim 4, characterized in that: The buffer tube (81) has an arc-shaped second drainage groove (86) on both sides along the rotation direction of the second rotating disk (85), and the buffer tube (81) has an arc-shaped first drainage groove (83) on both sides along the rotation direction of the first rotating disk (82).

6. The biogas desulfurization treatment device for a wastewater treatment plant according to claim 1, characterized in that: The mounting plate (7) is provided with a raised structure at the intersection of the tops of the buffer tubes (81); a liquid guide ring (87) is fixed on the top of the buffer tube (81), and the top of the liquid guide ring (87) is smoothly connected to the raised part of the mounting plate (7); the liquid guide ring (87) has a concave structure.

7. A biogas desulfurization treatment device for a wastewater treatment plant according to claim 6, characterized in that: The top of the buffer tube (81) is provided with a spiral structure second guide plate (9). The rotation angles of the corresponding second guide plates (9) on each turn of the buffer tube (81) are connected to each other, and several turns of the second guide plates (9) form several corresponding airflow rings (10).

8. A biogas desulfurization treatment device for a wastewater treatment plant according to claim 5, characterized in that: The rotation direction of the rotating disk and the opening direction of the flow channel in each loop of the buffer tube (81) are adapted to the rotation direction of the corresponding second guide plate (9) on each loop of the buffer tube (81).

9. A biogas desulfurization treatment device for a wastewater treatment plant according to claim 1, characterized in that: The flow guiding component includes several first flow guiding plates (6) fixed inside the desulfurization tank (1). The first flow guiding plates (6) have a horizontal V-shaped structure, and the included angle of the horizontal V-shaped structure of the several first flow guiding plates (6) increases sequentially.

10. A treatment method for a biogas desulfurization treatment device in a wastewater treatment plant, characterized in that, Includes the following steps: Step 1: Biogas is introduced into the desulfurization tank (1) through the gas inlet pipe (2). The biogas first enters through the bottom of the buffer pipe (81). Under the large gas pressure of the biogas, the second rotating disk (85) is first blown to rotate. Then, through the second diversion grooves (86) on both sides of the rotation direction of the second rotating disk (85), the biogas is introduced into the adjacent buffer pipe (81). Due to the pressure difference, the biogas is gradually divided into the first stage. Then, the biogas enters the vicinity of the first rotating disk (82) in the buffer pipe (81) and drives the first rotating disk (82) to rotate. Similarly, the rotation of the first rotating disk (82) gradually guides the biogas through the first diversion channel (83) into the adjacent buffer pipe (81), and then distributes it evenly in the second stage, so that the biogas is evenly distributed. Step 2: After the spray from the matrix spray device (4) passes through the air holes on the baffle (5), the spray is directed and sprayed directly through the air holes, forming a single contact. When the agent sprayed by the matrix spraying device (4) gathers on the mounting plate (7), which is the intersection of several buffer tubes (81), it is guided to the top of the buffer tube (81) through the protruding structure, and then guided to the center of the buffer tube (81) through the liquid guiding ring (87). With the help of the rotation of the first rotating plate (82), it is further brought into contact with biogas. Step 3: Through the cooperation of the second guide plate (9), buffer pipe (81), corresponding rotating disk and diversion groove, the biogas and spray mixture is pushed to spray out again through the buffer pipe (81). The multiple sets of second guide plates (9) guide the flow to form several airflow rings (10), which then form a high-efficiency collision contact with several rings of air holes of the corresponding baffle (5). Step 4: After the biogas is desulfurized, it passes through the matrix spray device (4) and impacts the bottom of the first guide plate (6). Under the guiding effect of the horizontal V-shaped structure of the first guide plate (6), the biogas gradually increases its flow speed and flows downwards in part, producing a backflow effect, and comes into contact with the spray again to improve the desulfurization effect. Step 5: The biogas that finally flows out flows out through the gas outlet pipe (3) to complete the subsequent actions.

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