A domestic waste power generation device based on marsh gas fermentation technology

Abstract

The utility model discloses a kind of household garbage power generation device based on marsh gas fermentation technology, it is related to electric power technical field, and it includes: suction box;Suction pipe, it is set to one side of suction box, for extracting after fermentation marsh gas;Filter mechanism, it is set to the inside one side of suction box and close to suction pipe;Suction component, it is set to the one side of suction box and away from filter mechanism;Absorption tank, it is installed to the other side of suction box;Gas collection mechanism, it is set to the inside of absorption tank;Power generation box, it is installed to the one side of absorption tank, and power generation box and gas collection mechanism are connected by pipeline intercommunication;Control panel, it is installed to the outside one side of absorption tank;Maintenance door, it is set to the outside one side of suction box;Gas concentration sensor, it is symmetrically set to the inner top of suction box.The utility model can expand gas receiving range by setting gas collection mechanism, marsh gas can be collected and transported stably, to improve the efficiency and stability of power generation.

Description

Technical Field

[0001] This utility model relates to the field of power technology, specifically to a waste-to-energy power generation device based on biogas fermentation technology. Background Technology

[0002] Household waste, as solid waste generated from daily activities, consists of items that have lost their usability in residential, commercial, and public settings (such as kitchen waste, waste paper, and plastics). Its core characteristic is that it can achieve resource regeneration or energy conversion through classified recycling (such as waste paper recycling and kitchen waste biogas production). Management needs to take into account reduction, resource utilization, and harmlessness. Biogas fermentation technology is a technology that uses anaerobic microorganisms to decompose and transform organic matter in organic waste under anaerobic conditions, ultimately generating biogas. In order to make reasonable use of the heat and electricity generated by biogas, it is processed through power generation devices and reused to generate electricity, thereby improving the comprehensive utilization of energy.

[0003] While existing power generation devices can collect and filter waste for power generation, the complex composition of municipal solid waste and the unstable fermentation process often result in biogas containing impurities such as hydrogen sulfide, siloxanes, dust, and moisture. These impurities accelerate the corrosion of some components of the power generation device, leading to increased maintenance costs and decreased power generation efficiency.

[0004] In addition, existing power generation units rely on single-stage gas storage tanks for buffering and collection, which makes it difficult to cope with uneven gas production over a long period of time and large amounts of biogas pressure. This causes the biogas pressure to fluctuate drastically during transportation, making it difficult for the generator set to frequently adjust the load to adapt to the gas intake conditions, resulting in additional energy loss and thus reducing the stability and continuity of the power generation unit.

[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0006] In view of the problems in related technologies, this utility model proposes a municipal solid waste power generation device based on biogas fermentation technology to overcome the above-mentioned technical problems existing in the existing related technologies.

[0007] Therefore, the specific technical solution adopted by this utility model is as follows: A municipal solid waste power generation device based on biogas fermentation technology includes: an extraction box; an extraction pipe disposed on one side of the extraction box for extracting biogas after fermentation; a filtration mechanism disposed on the inner side of the extraction box near the extraction pipe; an extraction assembly disposed on the side of the extraction box away from the filtration mechanism; an absorption box installed on the other side of the extraction box; a gas collection mechanism disposed inside the absorption box; a power generation box installed on one side of the absorption box, and the power generation box is connected to the gas collection mechanism via a pipe; a control panel installed on the outer side of the absorption box; a maintenance door disposed on the outer side of the extraction box; and a gas concentration sensor disposed inside the extraction box.

[0008] Furthermore, to ensure airtightness during biogas collection and facilitate filter replacement and cleaning, the maintenance door is connected to the extraction box via a hinge, and a handle is provided on one side of the maintenance door. The top and bottom of the maintenance door are each provided with a first end block and a second end block that mate with the first and second mounting slots.

[0009] Furthermore, to improve biogas purity and reduce corrosivity, the filtration mechanism includes a first filter screen and a second filter screen sequentially arranged inside the extraction box. The first filter screen has several first filter holes arranged equidistantly in a linear direction. Each first filter hole has a rectangular structure, and two sets of rectangular blocks are symmetrically arranged inside each first filter hole. The second filter screen has several second filter holes arranged equidistantly in a linear direction. Several linearly arranged connecting strips are provided on one side of the second filter screen, and a sponge board is connected to one side of each connecting strip. The sponge board has several first through holes. The top and bottom of the extraction box both have first and second mounting slots, which cooperate with the first and second filter screens.

[0010] Furthermore, to improve the biogas delivery efficiency, the extraction assembly includes an extraction pump located at the top of the extraction box. The output end of the extraction pump passes through the extraction box and is connected to a connecting frame. Several extraction frames are provided on both sides of the connecting frame. Several extraction holes are opened at the bottom of the connecting frame. Both the extraction frames and extraction holes are rectangular in structure.

[0011] Furthermore, to regulate and control the incoming biogas flow, ensuring stable flow and thus improving gas delivery stability, the gas collection mechanism includes a bidirectional pump installed inside the absorption box. One side of the bidirectional pump is connected to a gas collection pipe, which in turn connects to a gas collection head. A baffle plate with a circular structure is installed on one side of the gas collection head, featuring several obstruction holes and a second through hole arranged circumferentially. An output pipe is connected to the other side of the bidirectional pump. The gas collection head has a trumpet-shaped structure. A support plate that mates with the gas collection pipe is installed inside the absorption box, and an installation hole for the gas collection head is provided on one side of the absorption box.

[0012] The beneficial effects of this utility model are as follows: 1. This utility model incorporates a filtration mechanism, an extraction component, and a gas collection mechanism. First, the extraction component extracts gas, solving the problem of uneven extraction and unstable entry of raw biogas into the device. Through a gas guiding design, it ensures continuous and uniform intake of biogas, thereby improving gas collection efficiency. During extraction, the filtration mechanism filters out impurities generated during extraction, addressing the issues of blockage and corrosion caused by impurities of varying particle sizes and water vapor in the biogas. A layered filtration design removes impurities, improving biogas purity and extending the service life of key internal components. Finally, the gas collection mechanism addresses the issue of excessively fast flow rates and large pressure fluctuations when biogas enters subsequent stages. By expanding the gas receiving range and slowing the airflow speed, biogas can be collected and transported smoothly, improving gas transport stability and preventing sudden pressure changes from interfering with the power generation process, thus enhancing power generation efficiency and stability.

[0013] 2. This utility model, by setting up a filtration mechanism, through the coordinated cooperation of components such as the first filter screen, the second filter screen, the first filter hole, the second filter hole, the sponge plate, and the first through hole, can perform preliminary filtration of the incoming biogas, intercepting larger particulate impurities and further filtering out tiny particles and impurities in the biogas, ensuring that the biogas entering subsequent stages is relatively pure, thereby improving the purity of biogas and reducing corrosivity.

[0014] 3. This utility model improves the biogas delivery efficiency by setting up an air extraction component, which utilizes the coordinated operation of an air pump, a connecting frame, a rectangular air extraction frame, and air extraction holes to extract filtered biogas and transport it to a subsequent absorption box for collection.

[0015] 4. By setting up a gas collection mechanism, this utility model can expand the biogas collection range and improve the collection efficiency through the coordinated operation of a bidirectional pump, a gas collection pipe, a gas collection head with a horn structure, a flow baffle, a flow baffle hole, and a second through hole. This allows the incoming biogas flow to be regulated and controlled, ensuring a stable flow and thus improving the stability of gas delivery. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a municipal solid waste power generation device based on biogas fermentation technology according to an embodiment of the present utility model; Figure 2This is a cross-sectional view of a municipal solid waste power generation device based on biogas fermentation technology according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the absorption box in a municipal solid waste power generation device based on biogas fermentation technology according to an embodiment of the present utility model; Figure 4 This is a partial structural schematic diagram of a maintenance door in a municipal solid waste power generation device based on biogas fermentation technology according to an embodiment of the present utility model; Figure 5 This is a partial structural schematic diagram of a municipal solid waste power generation device based on biogas fermentation technology according to an embodiment of the present utility model; Figure 6 yes Figure 5 A magnified view of part A; Figure 7 This is a schematic diagram of the filtration mechanism in a municipal solid waste power generation device based on biogas fermentation technology according to an embodiment of the present utility model; Figure 8 This is a schematic diagram of the gas collection mechanism in a municipal solid waste power generation device based on biogas fermentation technology, according to an embodiment of the present utility model.

[0018] In the picture: 1. Air extraction box; 101. First mounting slot; 102. Second mounting slot; 2. Air extraction pipe; 3. Filtering mechanism; 301. First filter screen; 302. Second filter screen; 303. First filter hole; 304. Rectangular block; 305. Second filter hole; 306. Connecting strip; 307. Sponge board; 308. First through hole; 4. Air extraction assembly; 401. Air extraction pump; 402. Connecting frame; 403. Air extraction frame; 404. Air extraction hole 5. Absorption box; 501. Support plate; 502. Mounting hole; 6. Gas collection mechanism; 601. Two-way pump; 602. Gas collection pipe; 603. Gas collection head; 604. Baffle plate; 605. Baffle hole; 606. Second through hole; 607. Output pipe; 7. Generator box; 8. Control panel; 9. Maintenance door; 901. First end block; 902. Second end block; 10. Hinge; 11. Handle; 12. Gas concentration sensor. Detailed Implementation

[0019] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0020] According to an embodiment of the present invention, a municipal solid waste power generation device based on biogas fermentation technology is provided.

[0021] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figures 1-8 As shown, a waste-to-energy power generation device based on biogas fermentation technology according to an embodiment of this utility model includes: an extraction box 1; an extraction pipe 2, disposed on one side of the extraction box 1, for extracting biogas after fermentation; a filter mechanism 3, disposed on the inner side of the extraction box 1 near the extraction pipe 2; an extraction assembly 4, disposed on the side of the extraction box 1 away from the filter mechanism 3; an absorption box 5, installed on the other side of the extraction box 1; a gas collection mechanism 6, disposed inside the absorption box 5; a power generation box 7, installed on one side of the absorption box 5, and the power generation box 7 and the gas collection mechanism 6 are connected by a pipe; a control panel 8, installed on the outer side of the absorption box 5; a maintenance door 9, disposed on the outer side of the extraction box 1; and gas concentration sensors 12, symmetrically disposed on the inner top of the extraction box 1.

[0022] By employing the above-mentioned technical solution of this utility model, a filtration mechanism 3, an extraction component 4, and a gas collection mechanism 6 are set up. First, the extraction component 4 is used to extract gas, solving the problem of uneven extraction and difficulty in stable entry of raw biogas into the device. Through gas guidance design, it is ensured that biogas can be continuously and evenly drawn in, thereby improving gas collection efficiency. During the extraction process, the filtration mechanism 3 is used to filter impurities generated during extraction, solving the problem of easy clogging and corrosion by impurities of different particle sizes and water vapor contained in biogas. Through layered filtration design, impurities are removed, thereby improving biogas purity and extending the service life of key internal components of the device. After extraction, the gas collection mechanism 6 is used again to prevent the biogas from flowing too fast and the pressure from fluctuating greatly when it enters the subsequent stages. By expanding the gas receiving range and slowing down the airflow speed, biogas can be collected and transported smoothly, thereby improving the stability of gas transportation, avoiding interference from sudden pressure changes in the power generation process, and thus improving the efficiency and stability of power generation.

[0023] Furthermore, in practical applications, a control panel 8 is installed on the external side of the absorption box 5. This control panel 8 is electrically connected to the gas extraction assembly 4, the gas collection mechanism 6, the power generation box 7, and the gas concentration sensor 12. Operators can input relevant data through the human-machine interface of the control panel 8, thereby enabling the gas extraction assembly 4, the gas collection mechanism 6, the power generation box 7, and the gas concentration sensor 12 to extract and filter biogas, collect biogas, generate electricity, and detect the gas concentration inside each box.

[0024] In one embodiment, the maintenance door 9 is connected to the extraction box 1 via a hinge 10, and a handle 11 is provided on one side of the maintenance door 9. The maintenance door 9 has a first end block 901 and a second end block 902 at both its top and bottom, which mate with the first mounting groove 101 and the second mounting groove 102, thereby ensuring the sealing of biogas collection and facilitating the replacement and cleaning of the filter screen.

[0025] In one embodiment, the filtration mechanism 3 includes a first filter screen 301 and a second filter screen 302 sequentially disposed inside the extraction box 1. The first filter screen 301 has a plurality of first filter holes 303 arranged linearly and equidistantly, each with a rectangular structure. Two sets of rectangular blocks 304 are symmetrically arranged inside each first filter hole 303. The second filter screen 302 has a plurality of second filter holes 305 arranged linearly and equidistantly. A plurality of linearly arranged connecting strips 306 are disposed on one side of the second filter screen 302, and a sponge plate 307 is connected to one side of each connecting strip 306. The sponge plate 307 has a plurality of first through holes 308. The top and bottom of the extraction box 1 are provided with a first mounting groove 101 and a second mounting groove 102, which cooperate with the first filter screen 301 and the second filter screen 302 to improve biogas purity and reduce corrosivity.

[0026] Working principle of filtration mechanism 3: After the biogas in the biogas digester is introduced into the extraction box 1 through the extraction pipe 2 by the extraction component 4, the biogas comes into contact with the first filter screen 301. The first filter screen 301 has multiple rectangular filter holes 303, and there are two sets of rectangular blocks 304 symmetrically inside. When the biogas passes through the first filter holes 303 and the rectangular blocks 304, larger particulate impurities are blocked by the rectangular blocks 304 and intercepted, thus completing the initial filtration of larger particulate impurities in the biogas. When biogas reaches the second filter screen 302, the surface of the second filter screen 302 has second filter holes 305 distributed in an orderly manner. A linearly arranged connecting strip 306 on one side of the second filter screen 302 is connected to a sponge plate 307 with several first through holes 308. The biogas first passes through the second filter holes 305, where finer particulate impurities are further blocked. Then it passes through the first through holes 308 of the sponge plate 307. The sponge plate 307 has its own adsorption properties, adsorbing tiny particles, droplets, and some corrosive substances in the biogas. After preliminary filtration by the first filter screen 301 and deep processing by the second filter screen 302 and the sponge plate 307, the impurity content in the biogas is significantly reduced, its purity is improved, and corrosive substances are correspondingly reduced, thus increasing the purity of the biogas. Furthermore, the first mounting groove 101 and the second mounting groove 102, which are adapted to the top and bottom of the extraction box 1 and the first filter screen 301 and second filter screen 302, stabilize the filter screen position and ensure the stability of the filtration process.

[0027] In one embodiment, the above-mentioned extraction assembly 4 includes an extraction pump 401 disposed at the top of the extraction box 1. The output end of the extraction pump 401 passes through the extraction box 1 and is connected to a connecting frame 402. Several extraction frames 403 are disposed on both sides of the connecting frame 402. Several extraction holes 404 are opened at the bottom of the connecting frame 402. The extraction frames 403 and the extraction holes 404 are all rectangular in structure, thereby improving the biogas delivery efficiency.

[0028] Working principle of the extraction assembly 4: After the biogas passes through and is filtered, the extraction pump 401 located at the top of the extraction box 1 is started by the control panel 8. The output end of the extraction pump 401 is connected to the connecting frame 402 located inside the extraction box, and several rectangular extraction frames 403 are distributed on both sides of the connecting frame 402. At the same time, there are multiple rectangular extraction holes 404 at the bottom of the connecting frame 402. Under the negative pressure generated by the extraction pump 401, the filtered biogas is quickly extracted. The biogas can enter the interior of the connecting frame 402 through the extraction frames 403 on both sides of the connecting frame 402, or it can rush in from the extraction holes 404 at the bottom. The multi-channel air intake method increases the biogas intake area, allowing biogas to be collected more quickly and in larger quantities into the connecting frame 402. Then, under the continuous power output of the suction pump 401, the biogas is stably transported into the suction box 1. When suctioning, the gas concentration and sealing of the suction box 1 are detected by the symmetrical gas concentration sensors 12 inside the suction box 1. When the gas concentration reaches the preset threshold or a sealing leak is detected, the data value of the gas concentration and the detected sealing leak are fed back to the control panel 8, and manual inspection or repair is carried out by opening the maintenance door 9.

[0029] Conversely, when evacuation is not required, the air pump 401 can be stopped via the control panel 8 for subsequent work or maintenance.

[0030] In one embodiment, the gas collection mechanism 6 includes a bidirectional pump 601 disposed inside the absorption box 5. One side of the bidirectional pump 601 is connected to a gas collection pipe 602, which is connected to a gas collection head 603. A baffle plate 604 is disposed on one side of the gas collection head 603. The baffle plate 604 has a circular structure and is provided with a plurality of baffle holes 605 and a second through hole 606 arranged sequentially in a circumferential direction. An output pipe 607 is connected to the other side of the bidirectional pump 601. The gas collection head 603 has a trumpet-shaped structure. A support plate 501 that cooperates with the gas collection pipe 602 is disposed inside the absorption box 5. An installation hole 502 that cooperates with the gas collection head 603 is opened on one side of the absorption box 5, thereby allowing the incoming biogas flow to be regulated and controlled, ensuring stable flow and improving the stability of gas delivery.

[0031] Working principle of the gas collection mechanism 6: After the pure biogas completes the filtration and extraction process, the two-way pump 601 inside the absorption box 5 is started via the control panel 8. One side of the two-way pump 601 is connected to the gas collection pipe 602, and the end of the gas collection pipe 602 is connected to the trumpet-shaped gas collection head 603. The trumpet-shaped gas collection head 603, with its large air intake, can capture biogas over a wider area, gathering the surrounding dispersed biogas. The biogas enters the gas collection pipe 602 connected to the gas collection head 603. During the transmission process in the gas collection pipe 602, the flow-blocking holes 605 and the second through hole 606, which are connected to one side of the gas collection head 603 and have a circular structure, are distributed in sequence along the circumference of the flow-blocking plate 604. The incoming biogas flow is adaptively regulated. The flow-blocking hole 605 slows down the flow rate and prevents instability caused by excessively fast flow. The second through hole 606 ensures the flow of biogas, allowing it to continue to be transmitted in a relatively stable state. The support plate 501 inside the absorption box 5, which cooperates with the gas collection pipe 602, provides a stable support for the gas collection pipe 602, ensuring its stable position and preventing interference during biogas transmission. The regulated and stabilized biogas is stably delivered through the output pipe 607 connected to the other side of the bidirectional pump 601 for subsequent recycling in the power generation box 7. This ensures stable biogas delivery and efficient utilization of biogas by the entire power generation unit.

[0032] Conversely, when it is not necessary to supply biogas to the generator box 7, the bidirectional pump 601 inside the absorption box 5 can be stopped by controlling the control panel 8, thereby stopping the supply of processed biogas.

[0033] Furthermore, it should be noted that after the treated biogas enters the generator box 7, it flows into the gas engine cylinder, mixes with air, and ignites. The high-temperature, high-pressure gas generated by combustion drives the piston in a reciprocating linear motion, which is converted into crankshaft rotational motion by the connecting rod, thus realizing the conversion of thermal energy into mechanical energy. The crankshaft drives the generator rotor to rotate, and according to the principle of electromagnetic induction, the stator winding generates alternating current. The alternating current is stabilized by voltage and frequency regulators and distributed for use through a power distribution device, completing the conversion of biogas into electrical energy. The above are all existing technologies (not shown in the figure) and will not be elaborated on here.

[0034] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0035] In practical applications, after the biogas in the biogas digester is drawn into the extraction box 1 through the extraction pipe 2 via the extraction assembly 4, the control panel 8 controls the extraction pump 401 at the top of the extraction box 1 of the extraction assembly 4 to start. The power of the extraction pump 401 is transmitted to the connecting frame 402 connected inside the extraction box 1. The rectangular extraction frames 403 on both sides of the connecting frame 402 and the rectangular extraction hole 404 at the bottom allow the biogas to enter the connecting frame 402 through multiple channels under the negative pressure of the extraction pump 401, and then be stably delivered into the extraction box 1. During extraction, the symmetrical gas concentration sensors 12 inside the extraction box 1 detect the gas concentration and sealing performance, and provide feedback to the control panel 8 (the working principle of the extraction assembly 4 is as described above).

[0036] The maintenance door 9, connected to the extraction box 1 via hinge 10 and with a handle 11 on one side, can be opened for inspection and repair. When not extracting gas, the control panel 8 stops the extraction pump 401. The extraction pipe 2 draws biogas from the biogas digester into the extraction box 1. The biogas first contacts the first filter screen 301 of the filter mechanism 3. The rectangular first filter holes 303 and the internal symmetrical rectangular blocks 304 on the first filter screen 301 block larger particles of impurities. The second filter holes 305 on the surface of the second filter screen 302 block even finer particles of impurities. The connecting strip 306 on one side of the second filter screen 302 connects to the first filter screen. When biogas passes through the first through hole 308, the sponge plate 307 adsorbs tiny particles, droplets, and some corrosive substances. The first mounting groove 101 and the second mounting groove 102, which are adapted to the top and bottom of the extraction box 1 and the first filter screen 301 and the second filter screen 302, stabilize the position of the filter screen. The first end block 901 and the second end block 902 at the top and bottom of the maintenance door 9 cooperate with the first mounting groove 101 and the second mounting groove 102 to ensure sealing and facilitate the replacement and cleaning of the filter screen (the working principle of the filter mechanism 3 is as described above).

[0037] After the pure biogas has completed the filtration and extraction process, the control panel 8 controls the start of the bidirectional pump 601 inside the absorption box 5 of the gas collection mechanism 6. The trumpet-shaped gas collection head 603 at the end of the gas collection pipe 602 on one side of the bidirectional pump 601 captures and gathers the biogas over a wide range. When the biogas enters the gas collection pipe 602 for transmission, the flow-blocking holes 605 and the second through hole 606 on the circumference of the circular flow-blocking plate 604 connected to the gas collection head 603 adaptively adjust the airflow. The flow-blocking holes 605 slow down the airflow, and the second through hole 606 ensures the passage. The support plate 501 inside the absorption box 5 stabilizes the gas collection pipe 602. The biogas after adjustment and stabilization is stably transported to the power generation box 7 for recycling through the output pipe 607 connected to the other side of the bidirectional pump 601. When it is not necessary to supply biogas to the power generation box 7, the bidirectional pump 601 inside the absorption box 5 can be stopped by the control panel 8, thereby stopping the supply of processed biogas (the working principle of the gas collection mechanism 6 is as described above).

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A municipal solid waste power generation device based on biogas fermentation technology, characterized in that, include: Evacuation box (1); The extraction pipe (2) is located on one side of the extraction box (1) and is used to extract biogas after fermentation. The filter mechanism (3) is located inside the air extraction box (1) and close to the air extraction pipe (2); The air extraction assembly (4) is located on the side of the air extraction box (1) away from the filter mechanism (3); Absorption box (5) is installed on the other side of the extraction box (1); The gas collection mechanism (6) is located inside the absorption box (5); A generator box (7) is installed on one side of the absorption box (5), and the generator box (7) is connected to the gas collection mechanism (6) through a pipe; Control panel (8) is installed on the outside of the absorption box (5); Maintenance door (9) is located on the outside side of the extraction box (1); A gas concentration sensor (12) is symmetrically arranged on the inner top of the extraction box (1).

2. The municipal solid waste power generation device based on biogas fermentation technology according to claim 1, characterized in that, The maintenance door (9) is connected to the air extraction box (1) by a hinge (10), and a handle (11) is provided on one side of the maintenance door (9).

3. A municipal solid waste power generation device based on biogas fermentation technology according to claim 1, characterized in that, The filtration mechanism (3) includes a first filter screen (301) and a second filter screen (302) sequentially disposed inside the air extraction box (1). The first filter screen (301) has a plurality of first filter holes (303) arranged equidistantly in a linear direction. The first filter holes (303) have a rectangular structure and two sets of rectangular blocks (304) are symmetrically arranged inside the first filter holes (303). The second filter screen (302) has a plurality of second filter holes (305) arranged equidistantly in a linear direction. A plurality of linearly arranged connecting strips (306) are provided on one side of the second filter screen (302). A sponge board (307) is connected to one side of the connecting strips (306). A plurality of first through holes (308) are provided on the sponge board (307).

4. A municipal solid waste power generation device based on biogas fermentation technology according to claim 3, characterized in that, The top and bottom of the air extraction box (1) are provided with a first mounting groove (101) and a second mounting groove (102), and the first mounting groove (101) and the second mounting groove (102) cooperate with the first filter screen (301) and the second filter screen (302).

5. A municipal solid waste power generation device based on biogas fermentation technology according to claim 4, characterized in that, The maintenance door (9) has a first end block (901) and a second end block (902) at the top and bottom, which cooperate with the first mounting groove (101) and the second mounting groove (102).

6. A municipal solid waste power generation device based on biogas fermentation technology according to claim 1, characterized in that, The air extraction assembly (4) includes an air pump (401) disposed on the top of the air extraction box (1). The output end of the air pump (401) passes through the air extraction box (1) and is connected to a connecting frame (402). Several air extraction frames (403) are provided on both sides of the connecting frame (402). The bottom of the connecting frame (402) is provided with several air extraction holes (404), and the air extraction frame (403) is provided with several air extraction holes (404).

7. A municipal solid waste power generation device based on biogas fermentation technology according to claim 6, characterized in that, Both the air extraction frame (403) and the air extraction hole (404) are rectangular structures.

8. A municipal solid waste power generation device based on biogas fermentation technology according to claim 1, characterized in that, The gas collection mechanism (6) includes a bidirectional pump (601) installed inside the absorption box (5). A gas collection pipe (602) is connected to one side of the bidirectional pump (601). A gas collection head (603) is connected to the gas collection pipe (602). A flow baffle (604) is installed on one side of the gas collection head (603). The flow baffle (604) has a circular structure. A plurality of flow baffle holes (605) and a second through hole (606) are arranged in sequence in the circumferential direction on the flow baffle (604). The other side of the bidirectional pump (601) is connected to an output pipe (607).

9. A municipal solid waste power generation device based on biogas fermentation technology according to claim 8, characterized in that, The air intake head (603) has a trumpet-shaped structure.

10. A municipal solid waste power generation device based on biogas fermentation technology according to claim 9, characterized in that, The absorption box (5) is provided with a support plate (501) that cooperates with the gas collection pipe (602), and an installation hole (502) that cooperates with the gas collection head (603) is provided on one side of the absorption box (5).

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