Landfill gas collection apparatus

Abstract

This invention relates to the field of landfill treatment technology and discloses a landfill gas collection device, including a filter cylinder, and further comprising: a top cylinder, which is fixedly connected to the top of the filter cylinder, and a gas guide pipe is fixedly connected inside the top cylinder, extending to the bottom of the filter cylinder and fixedly connected to a fine filter sleeve, the gas guide pipe located inside the filter cylinder having multiple sets of extraction holes, and a separation section provided on the gas guide pipe; and an extraction pipe, which is fixedly connected to the top end of the gas guide pipe, the extraction pipe having a deodorization section for treating the extracted landfill gas, and a piston section for extracting gas installed on the extraction pipe; this invention drives a friction roller by a drive motor, and uses magnetic coupling to drive a centrifugal disc to rotate at high speed, superimposing a strong mechanical rotational force field on the fluid vortex induced by the separation channel, forming a composite centrifugal force field, effectively throwing out liquid droplets in the landfill gas, significantly reducing the moisture content of the landfill gas, so as to facilitate subsequent storage or utilization of the landfill gas.

Description

Technical Field

[0001] This invention relates to the field of landfill treatment technology, specifically to a landfill gas collection device. Background Technology

[0002] In the operation of landfills, the effective collection of landfill gas (mainly composed of methane and carbon dioxide) is not only a key link in preventing greenhouse gas emissions and reducing air pollution, but also an important foundation for realizing the recycling and utilization of biomass energy.

[0003] However, existing landfill gas collection devices still face many technical bottlenecks in practical applications, which seriously restrict collection efficiency and gas quality. First, when landfill gas is extracted from the landfill, it inevitably carries a large amount of moisture, including leachate droplets produced by landfill degradation and saturated water vapor, resulting in the collected landfill gas being in a high humidity or even liquid state, which has an adverse effect on subsequent storage and use. In addition, many existing devices use fixed-bed activated carbon adsorption, and the activated carbon particles are prone to caking or forming airflow short circuits when left stagnant for a long time, which prevents the adsorbent from fully contacting the gas, resulting in an unsatisfactory removal rate of odor molecules and a reduction in deodorization effect. Summary of the Invention

[0004] This invention provides a landfill gas collection device that efficiently separates liquid droplets through a composite centrifugal force field to reduce water content; it utilizes dynamic fluidized adsorption and flow channel design to improve deodorization effect and ensure subsequent utilization of landfill gas, thus solving the problems mentioned in the background art, such as high water content of existing landfill gas, which is not conducive to storage and use; and the problems of poor deodorization effect caused by caking and short circuits in fixed bed adsorption.

[0005] This invention provides the following technical solution: A landfill gas collection device includes a filter cartridge and further includes: a top cylinder fixedly connected to the top of the filter cartridge, wherein a gas guide pipe is fixedly connected inside the top cylinder, the gas guide pipe extends to the bottom of the filter cartridge and is fixedly connected to a fine filter sleeve, the gas guide pipe located inside the filter cartridge has multiple sets of extraction holes, and the gas guide pipe is provided with a separation section; an extraction pipe fixedly connected to the top end of the gas guide pipe, wherein the extraction pipe is provided with a deodorization section for treating the extracted landfill gas, and the extraction pipe is equipped with a piston section for extracting gas; and a drainage section provided on the gas guide pipe for discharging liquid that has permeated into the filter cartridge.

[0006] As a preferred embodiment of the present invention, the separation unit includes a separation cylinder, which is fixed on and connected to the air guide pipe. A centrifugal disc is rotatably connected inside the separation cylinder. Multiple sets of separation channels are formed inside the centrifugal disc. The separation channels are connected to the two side cavities of the separation cylinder. A drain groove matching the number and position of the separation channels is formed on the outer arc wall of the centrifugal disc. A collection groove connected to each set of drain grooves is formed at the bottom of the separation cylinder. Multiple sets of guide channels are formed between the separation channels and their corresponding drain grooves.

[0007] As a preferred embodiment of the present invention, the bottom of the separation cylinder is fixedly connected to multiple sets of return pipes, the top end of the return pipes is connected to the bottom of the inner cavity of the liquid collection tank, the bottom end of the return pipes extends through to the top cylinder, and a one-way valve is provided inside the return pipes.

[0008] As a preferred embodiment of the present invention, the deodorizing unit includes a spherical cylinder, which is fixedly connected to and communicates with the suction pipe. A spherical disk is rotatably connected inside the spherical cylinder. An adsorption chamber is formed in the middle of the spherical disk. Acceleration channels are symmetrically formed on both sides of the spherical disk. The two ends of the acceleration channels are respectively connected to the inner cavity of the spherical cylinder and the adsorption chamber.

[0009] As a preferred embodiment of the present invention, a first magnetic ring is rotatably sleeved on the outer wall of the separating cylinder, and the first magnetic ring is magnetically attracted to the centrifugal disk. A first inclined ring is fixedly connected to the outer arc wall of the first magnetic ring. A second magnetic ring is rotatably sleeved on the outer wall of the spherical disk, and the second magnetic ring is magnetically attracted to the spherical disk. A second inclined ring is fixedly connected to the outer arc wall of the second magnetic ring. A drive motor is fixedly connected to the side wall of the top cylinder, and a friction roller is fixedly connected to the output end of the drive motor. The friction roller is in contact with the inclined surfaces of the first inclined ring and the second inclined ring, respectively, so that the friction roller can synchronously drive the first inclined ring and the second inclined ring to rotate.

[0010] As a preferred embodiment of the present invention, both the separation channel and the acceleration channel adopt a spiral design.

[0011] As a preferred embodiment of the present invention, the drainage section includes a drainage pipe, which is fixedly connected inside the air guide pipe. The input end of the drainage pipe extends into the fine filter sleeve, and the output end of the drainage pipe penetrates into the outer wall of the air guide pipe. A drainage pump is installed on the output end side of the drainage pipe.

[0012] As a preferred embodiment of the present invention, the piston part includes a piston box, which is fixedly connected to and communicates with the suction pipe. A piston plate is slidably connected inside the cavity of the piston box. An electric cylinder is fixedly connected to the top of the piston box. The telescopic end of the electric cylinder passes through the piston box and is fixedly connected to the top of the piston plate. A one-way valve is provided in the suction pipes on both sides of the piston box.

[0013] As a preferred embodiment of the present invention, the top cylinder, the drain pipe and the air extraction pipe are together wrapped and fixed with a protective box. An air guide window is installed on one side of the protective box. The top two sides of the piston box are respectively fixed and connected with a first conduit and a second conduit. The other end of the first conduit is connected to the inner cavity of the protective box, and the other end of the second conduit is connected to the atmospheric environment. A one-way valve is provided in both the first conduit and the second conduit.

[0014] As a preferred embodiment of the present invention, the inner wall of the filter cylinder is fixedly connected with geotextile, a filter chamber is provided inside the filter cylinder, and the filter chamber is filled with gravel.

[0015] Compared with the prior art, the present invention provides a landfill gas collection device for landfills, which has the following beneficial effects: 1. This landfill gas collection device uses a drive motor to drive a friction roller, which in turn uses magnetic coupling to drive a centrifugal disc to rotate at high speed. Based on the fluid swirling induced by the separation channel, a powerful mechanical rotational force field is superimposed to form a composite centrifugal force field, which effectively throws out the liquid droplets in the landfill gas, significantly reducing the water content of the landfill gas, so that the landfill gas can be stored or utilized in the future.

[0016] 2. This landfill gas collection device features a structure that enhances the rotation of the spherical disk driven by magnetic coupling. This keeps the activated carbon particles in the adsorption chamber in a dynamically tumbling fluidized state, breaking down the gas film boundary layer on the particle surface and accelerating the diffusion and adsorption of odor molecules. It also avoids the caking or channeling effect that can occur when activated carbon is left to stand for a long time, ensuring that each activated carbon particle can fully participate in the reaction. In addition, the jet effect of the accelerating flow channel and the diffusion and deceleration design enable the gas to enter quickly and exit slowly in the adsorption chamber, extending the contact time between the gas and the activated carbon particles and significantly improving the deodorization effect.

[0017] 3. This landfill gas collection device uses a three-stage physical filtration system consisting of geotextile, gravel layer, and fine filter sleeve to effectively block soil and waste impurities of different particle sizes, preventing pipe blockage. Furthermore, it utilizes a liquid level sensor at the bottom of the gas duct and a drainage pump to form an intelligent closed-loop linkage. Once the accumulated liquid exceeds the threshold, it automatically starts to discharge, avoiding problems such as poor gas flow or reduced gas extraction efficiency due to water accumulation, thereby improving the landfill gas collection efficiency. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0019] Figure 1 This is a first-view perspective stereoscopic diagram of the present invention; Figure 2 This is a second-view perspective stereoscopic diagram of the present invention; Figure 3 This is a schematic diagram of the internal structure of the protective box of the present invention; Figure 4 This is a partial cross-sectional schematic diagram of the present invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram of region A in the middle; Figure 6 For the present invention Figure 4 Enlarged structural diagram of region B in the middle; Figure 7 For the present invention Figure 4 Enlarged structural diagram of region C in the middle; Figure 8 This is a schematic diagram of the centrifuge disc structure of the present invention; Figure 9 This is a schematic diagram of the spherical disk structure of the present invention.

[0020] In the diagram: 1. Filter cartridge; 2. Top cylinder; 21. Air guide pipe; 22. Fine filter sleeve; 23. Air extraction hole; 3. Air extraction pipe; 4. Separation cylinder; 41. Centrifuge disc; 42. Separation channel; 43. Drainage tank; 44. Collection tank; 45. Flow guide channel; 46. Return pipe; 47. First magnetic ring; 48. First inclined ring; 5. Spherical cylinder; 51. Spherical disc; 52. Adsorption chamber; 53. Acceleration channel; 54. Second magnetic ring; 55. Second inclined ring; 6. Drive motor; 61. Friction roller; 7. Drain pipe; 71. Drain pump; 8. Piston box; 81. Piston plate; 82. Electric cylinder; 9. Protective box; 91. Air guide window; 92. First guide pipe; 93. Second guide pipe. Detailed Implementation

[0021] 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.

[0022] Reference Figures 1-9A landfill gas collection device includes a filter cylinder 1, with geotextile fixedly connected to the inner wall of the filter cylinder 1. A filter chamber is formed inside the filter cylinder 1 and filled with gravel. The device also includes: a top cylinder 2, fixedly connected to the top of the filter cylinder 1, with a gas guide pipe 21 fixedly connected inside the top cylinder 2. The top cylinder 2 and the gas guide pipe 21 are coaxially arranged. The gas guide pipe 21 extends to the bottom of the filter cylinder 1 and is fixedly connected to a fine filter sleeve 22. Multiple sets of extraction holes 23 are formed on the gas guide pipe 21 inside the filter cylinder 1, and a separation section is provided on the gas guide pipe 21; an extraction pipe 3, fixedly connected to the top end of the gas guide pipe 21, with the output end of the extraction pipe 3 connected to a gas storage device or a gas-fired power generation device. The extraction pipe 3 is provided with a deodorization section for treating the extracted landfill gas and a piston section for extracting gas; and a drainage section, located on the gas guide pipe 21, for discharging liquid that has permeated into the filter cylinder 1.

[0023] Reference Figures 1-4 The piston part includes a piston box 8, which is fixedly connected to the suction pipe 3 and communicates with the suction pipe 3. A piston plate 81 is slidably connected inside the cavity of the piston box 8. An electric cylinder 82 is fixedly connected to the top of the piston box 8. The telescopic end of the electric cylinder 82 passes through the piston box 8 and is fixedly connected to the top of the piston plate 81. One-way valves are provided in the suction pipes 3 on both sides of the piston box 8.

[0024] It should be noted that the one-way valve located on the output side of the extraction pipe 3 (near the air guide pipe 21) can only allow the gas in the extraction pipe 3 to enter the piston box 8; the one-way valve located on the input side of the extraction pipe 3 (near the next stage equipment) can only allow the gas in the piston box 8 to enter the extraction pipe 3.

[0025] With the above structure, when landfill gas needs to be collected, the electric cylinder 82 is activated, causing the piston plate 81 to slide back and forth in the piston box 8. When the piston plate 81 moves upward, a negative pressure suction force is generated in the piston box 8, thereby opening the one-way valve on the input side of the suction pipe 3, allowing the landfill gas in the air guide pipe 21 to enter the piston box 8 along the suction pipe 3. Then, when the piston plate 81 moves downward, it squeezes the landfill gas sucked into the piston box 8 and opens the one-way valve on the output side of the suction pipe 3, allowing the landfill gas to flow into the next stage of equipment along the suction pipe 3, thereby achieving the collection of landfill gas.

[0026] Reference Figures 2-4 and Figure 8The separation unit includes a separation cylinder 4, which is fixed to and connected to the air guide pipe 21. A centrifugal disc 41 is rotatably connected inside the separation cylinder 4. Multiple sets of separation channels 42 are formed inside the centrifugal disc 41, and the separation channels 42 are connected to the two side cavities of the separation cylinder 4. Drainage grooves 43 are formed on the outer arc wall of the centrifugal disc 41, matching the number and position of the separation channels 42. A collection groove 44 is formed at the bottom of the separation cylinder 4, which is connected to each set of drainage grooves 43. Multiple sets of guide channels 45 are formed between the separation channels 42 and their corresponding drainage grooves 43, and the guide channels 45 are designed in a spiral shape. The bottom of the separation cylinder 4 is fixedly connected to multiple sets of return pipes 46. The top end of the return pipe 46 is connected to the bottom of the inner cavity of the liquid collection tank 44, and the bottom end of the return pipe 46 extends through into the top cylinder 2. A one-way valve is provided in the return pipe 46. A first magnetic ring 47 is rotatably sleeved on the outer wall of the separation cylinder 4. The first magnetic ring 47 is magnetically attracted to the centrifugal disc 41. A first inclined ring 48 is fixedly connected to the outer arc wall of the first magnetic ring 47. A drive motor 6 is fixedly connected to the side wall of the top cylinder 2. A friction roller 61 is fixedly connected to the output end of the drive motor 6. The friction roller 61 is in contact with the inclined surface of the first inclined ring 48.

[0027] It should be noted that the one-way valve in the return pipe 46 can only allow the liquid in the collection tank 44 to enter the top cylinder 2 through the return pipe 46.

[0028] With the above structure, the gas entering the separation cylinder 4 will enter each set of spiral separation channels 42. At this time, the side wall of the spiral channel forces the fluid to change its linear motion direction, generating a rotational motion around the axis. As the fluid rotates, centrifugal force is generated. At this time, the denser droplets are thrown towards the wall of the separation channel 42 and condense under the action of centrifugal force, while the less dense gas gathers in the center of the separation channel 42. When the liquid rotates and moves along the wall of the separation channel 42, it will pass through the guide channel 45. At this time, under the action of centrifugal force, the liquid will enter the drain tank 43 along the guide channel 45 and converge into the collection tank 44 under the action of gravity. Finally, it is guided to the top cylinder 2 by the return pipe 46 and then slides down to the bottom of the gas guide pipe 21. In this way, the gas-liquid separation is achieved by utilizing the density difference between the gas and liquid phases. Simultaneously, the drive motor 6 is started. The friction between the friction roller 61 and the first inclined ring 48 causes the first inclined ring 48 to rotate. When the first inclined ring 48 rotates, it drives the first magnetic ring 47 to rotate. Utilizing the magnetic attraction between the first magnetic ring 47 and the centrifugal disk 41, the centrifugal disk 41 rotates at high speed within the separation cylinder 4. This superimposes a powerful mechanical rotational force field onto the spiral motion of the fluid itself, forming a composite centrifugal force field with a strength far exceeding that of a single action, further achieving efficient gas-liquid separation. Separation; in addition, under the high-speed rotation of the centrifugal disc 41, the landfill gas initially entering the separation cylinder 4 will directly collide with the windward side of the centrifugal disc 41 due to inertia. At this time, the centrifugal force can directly achieve solid-liquid separation, effectively reducing the moisture content of the landfill gas entering the separation channel 42. The separated liquid will be thrown onto the inner wall of the separation cylinder 4 and condense. Finally, under the action of gravity, it will slide down the inner wall of the separation cylinder 4 and the gas guide pipe 21. In summary, the moisture content of the landfill gas is effectively reduced for subsequent storage or utilization.

[0029] Reference Figure 2 , Figure 3 , Figure 5 and Figure 9 The deodorization unit includes a spherical cylinder 5, which is fixedly connected to and communicates with the suction pipe 3. A spherical disk 51 is rotatably connected inside the spherical cylinder 5. An adsorption chamber 52 is opened in the middle of the spherical disk 51, and activated carbon particles are filled in the adsorption chamber 52. Acceleration channels 53 are symmetrically opened on both sides of the spherical disk 51. The acceleration channels 53 are spirally designed, and the two ends of the acceleration channels 53 are respectively connected to the inner cavity of the spherical cylinder 5 and the adsorption chamber 52. A second magnetic ring 54 is rotatably sleeved on the outer wall of the spherical disk 51. The second magnetic ring 54 is magnetically attracted to the spherical disk 51. A second inclined ring 55 is fixedly connected to the outer arc wall of the second magnetic ring 54. The inclined surface of the second inclined ring 55 is in contact with the friction roller 61.

[0030] With the above-described structure, the dehydrated landfill gas enters the spherical cylinder 5 and then enters the adsorption chamber 52 after passing through the acceleration channel 53. When the friction roller 61 rotates, it also drives the second inclined ring 55 to rotate, which in turn drives the second magnetic ring 54 to rotate. Utilizing the magnetic attraction between the second magnetic ring 54 and the spherical disk 51, the spherical disk 51 rotates within the spherical cylinder 5, causing the activated carbon particles in the adsorption chamber 52 to roll. This ensures uniform contact between the gas and the activated carbon particles, allowing each activated carbon particle to participate in the adsorption process, thereby improving the utilization rate of the activated carbon. Furthermore, this breaks the gas film boundary layer on the surface of the activated carbon particles, accelerating the diffusion rate of odor molecules into the micropores of the activated carbon, thus improving the adsorption efficiency. In addition, by utilizing the spiral-shaped acceleration channel 53 and the centrifugal effect generated by the overall rotation of the spherical disk 51, the landfill gas entering the adsorption chamber 52 can be accelerated, so that the landfill gas rushes into the adsorption chamber 52 in a jet-like state, so as to better break the gas film boundary layer on the surface of the activated carbon particles and further improve the adsorption efficiency. After the landfill gas enters the adsorption chamber 52, the inner diameter of the adsorption chamber 52 suddenly increases compared with the acceleration channel 53, and the landfill gas will decelerate, thereby increasing the residence time of the landfill gas in the adsorption chamber 52, that is, the contact time with the activated carbon particles, and thus improving the adsorption effect.

[0031] In addition, it should be noted that since the generation of landfill gas takes a certain amount of time, the collection of landfill gas is carried out periodically. Before each collection, the activated carbon particles in the spherical disc 51 can be replaced according to the actual situation to maintain a good odor adsorption effect. At the same time, regular replacement can also prevent excessive wear of the activated carbon particles during rolling.

[0032] Reference Figures 1-4 and Figure 7 The drainage section includes a drain pipe 7, which is fixedly connected inside the air guide pipe 21. The inlet end of the drain pipe 7 extends into the fine filter sleeve 22, which is used to finely filter the liquid to prevent clogging of the drain pipe 7. The outlet end of the drain pipe 7 extends through the outer wall of the air guide pipe 21, and a drain pump 71 is installed on the outlet end side of the drain pipe 7. A liquid level sensor is installed on the lower part of the side wall of the air guide pipe 21, and the liquid level sensor is lower than the lowest air extraction hole 23. The liquid level sensor is electrically connected to the drain pump 71, so the start and stop of the drain pump 71 can be controlled by the liquid level height feedback of the liquid level sensor.

[0033] With the above-described structure, filter cartridge 1 blocks large particles of soil and garbage impurities. Landfill gas and liquid generated inside the landfill waste then enter the filter chamber filled with crushed stone for coarse filtration, followed by fine filtration through the geotextile on the inner wall of filter cartridge 1. Finally, landfill gas enters the air guide pipe 21 through the exhaust port 23, while liquid passes through the fine filter sleeve 22 and also enters the air guide pipe 21. When the liquid level sensor detects that the liquid level at the bottom of the air guide pipe 21 is higher than the set value, the drainage pump 71 is automatically activated to discharge the accumulated liquid through the drainage pipe 7, preventing liquid from clogging the gas path.

[0034] Reference Figures 1-4 The top cylinder 2, drain pipe 7 and air extraction pipe 3 are together wrapped and fixed with a protective box 9. The protective box 9 is used to protect the equipment. A vent window 91 is installed on one side of the protective box 9. The top two sides of the piston box 8 are respectively fixed and connected to the first conduit 92 and the second conduit 93. The other end of the first conduit 92 is connected to the inner cavity of the protective box 9, and the other end of the second conduit 93 is connected to the atmospheric environment. Both the first conduit 92 and the second conduit 93 are equipped with one-way valves.

[0035] It should be noted that the one-way valve in the first conduit 92 can only allow the gas in the protective box 9 to enter the top cavity of the piston box 8; the one-way valve in the second conduit 93 can only allow the airflow in the top cavity of the piston box 8 to be discharged into the atmospheric environment.

[0036] With the above-described structure, when the piston plate 81 moves downward within the piston box 8, it creates a suction effect in the top cavity of the piston box 8 and opens the one-way valve in the first conduit 92, allowing the airflow in the protective box 9 to be drawn into the top cavity of the piston box 8. At this time, the airflow in the atmospheric environment will be replenished into the protective box 9 through the air guide window 91. When the piston plate 81 moves upward, it compresses the drawn-in gas and opens the one-way valve in the second conduit 93, allowing the gas to be discharged into the atmospheric environment. This process repeats, accelerating the heat exchange rate of the airflow in the protective box 9, improving the effective protection of its internal components, and increasing the overall service life of the device.

[0037] Reference Figures 1-9 In this invention, during use, the filter cartridge 1 is first buried in the landfill, and the filter cartridge 1 is used to block large particles of soil and garbage impurities. Then, the landfill gas and liquid generated inside the landfill garbage will enter the filter chamber filled with crushed stone for coarse filtration, and then pass through the geotextile on the inner wall of the filter cartridge 1 for fine filtration. Finally, the landfill gas will enter the air guide pipe 21 through the air extraction hole 23, while the liquid will pass through the fine filter sleeve 22 and also enter the air guide pipe 21. When the liquid level sensor detects that the liquid level at the bottom of the air guide pipe 21 is higher than the set value, the drainage pump 71 is automatically started to discharge the accumulated liquid through the drainage pipe 7, preventing the liquid from blocking the gas path.

[0038] When landfill gas needs to be collected, the electric cylinder 82 is activated, causing the piston plate 81 to slide back and forth in the piston box 8. When the piston plate 81 moves upward, a negative pressure suction force is generated in the piston box 8, thereby opening the one-way valve on the input side of the suction pipe 3, allowing the landfill gas in the air guide pipe 21 to enter the piston box 8 along the suction pipe 3. Then, when the piston plate 81 moves downward, it compresses the landfill gas sucked into the piston box 8 and opens the one-way valve on the output side of the suction pipe 3, allowing the landfill gas to flow into the next stage of equipment along the suction pipe 3, thereby achieving the collection of landfill gas.

[0039] Additionally, the gas entering the separation cylinder 4 enters each set of spiral separation channels 42. The sidewalls of these spiral channels force the fluid to change its linear motion, generating rotational motion around its axis. This rotation generates centrifugal force, causing denser droplets to be thrown towards the walls of the separation channels 42 and coalesce, while less dense gas accumulates at the center of the separation channels 42. As the liquid rotates along the walls of the separation channels 42, it passes through the guide channel 45. Under centrifugal force, the liquid flows through the guide channel 45 into the drain tank 43 and, under gravity, converges into the collection tank 44. Finally, it is guided by the return pipe 46 to the top cylinder 2 and then slides down the gas guide pipe 21 to its bottom. This utilizes the density difference between the gas and liquid phases to achieve gas-liquid separation. Simultaneously, the drive motor 6 is activated, using the friction between the friction roller 61 and the first inclined ring 48 and the second inclined ring 55 to simultaneously rotate them. When the first inclined ring 48 rotates, it drives the first magnetic ring 47 to rotate. Utilizing the magnetic attraction between the first magnetic ring 47 and the centrifugal disk 41, the centrifugal disk 41 rotates at high speed within the separation cylinder 4. This superimposes a powerful mechanical rotational force field onto the spiral motion of the fluid itself, forming a composite centrifugal force field with strength far exceeding that of a single action, further achieving effective gas-liquid separation. Furthermore, under the high-speed rotation of the centrifugal disk 41, the initial landfill gas entering the separation cylinder 4 will directly collide with the windward side of the centrifugal disk 41 due to inertia. At this point, centrifugal force directly achieves solid-liquid separation, effectively reducing the moisture content of the landfill gas subsequently entering the separation channel 42. The separated liquid is thrown onto the inner wall of the separation cylinder 4 and condenses, eventually sliding down the inner wall of the separation cylinder 4 and the gas guide pipe 21 under gravity. In summary, this effectively reduces the moisture content of the landfill gas for subsequent storage or utilization.

[0040] Furthermore, the landfill gas, after dehydration, enters the spherical cylinder 5 and, after passing through the acceleration channel 53, enters the adsorption chamber 52. When the second inclined ring 55 rotates, it drives the second magnetic ring 54 to rotate. Utilizing the magnetic attraction between the second magnetic ring 54 and the spherical disk 51, the spherical disk 51 rotates within the spherical cylinder 5, causing the activated carbon particles in the adsorption chamber 52 to roll. This ensures uniform contact between the gas and the activated carbon particles, allowing each activated carbon particle to participate in the adsorption process, thereby improving the utilization rate of the activated carbon. It also breaks the gas film boundary layer on the surface of the activated carbon particles, accelerating the diffusion rate of odor molecules into the micropores of the activated carbon, thus improving the adsorption efficiency. In addition, by utilizing the spiral-shaped acceleration channel 53 and the centrifugal effect generated by the overall rotation of the spherical disk 51, the landfill gas entering the adsorption chamber 52 can be accelerated, so that the landfill gas rushes into the adsorption chamber 52 in a jet-like state, so as to better break the gas film boundary layer on the surface of the activated carbon particles and further improve the adsorption efficiency. After the landfill gas enters the adsorption chamber 52, the inner diameter of the adsorption chamber 52 suddenly increases compared with the acceleration channel 53, and the landfill gas will decelerate, thereby increasing the residence time of the landfill gas in the adsorption chamber 52, that is, the contact time with the activated carbon particles, and thus improving the adsorption effect.

[0041] Components not described in detail in this article are existing technologies.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A landfill gas collection device, comprising a filter cartridge (1), characterized in that, Also includes: Top cylinder (2), which is fixedly connected to the top of filter cylinder (1), The top cylinder (2) is fixedly connected to an air guide pipe (21), which extends to the bottom of the filter cylinder (1) and is fixedly connected to a fine filter sleeve (22). Multiple sets of air extraction holes (23) are opened on the air guide pipe (21) located inside the filter cylinder (1), and a separation part is provided on the air guide pipe (21). The suction pipe (3) is fixedly connected to the top end of the air guide pipe (21). The gas extraction pipe (3) is provided with a deodorization section for treating the extracted landfill gas, and the gas extraction pipe (3) is equipped with a piston section for extracting gas. The drainage section is provided on the air guide pipe (21) and is used to discharge the liquid that has permeated into the filter cartridge (1).

2. The landfill gas collection device according to claim 1, characterized in that, The separation section includes a separation cylinder (4), which is fixed on the air guide pipe (21) and connected to the air guide pipe (21). A centrifugal disc (41) is rotatably connected inside the separation cylinder (4). Multiple sets of separation channels (42) are opened inside the centrifugal disc (41). The separation channels (42) are connected to the two side cavities of the separation cylinder (4). A drain trough (43) matching the number and position of the separation channels (42) is opened on the outer arc wall of the centrifugal disc (41). A collection trough (44) connected to each set of drain troughs (43) is opened at the bottom of the separation cylinder (4). Multiple sets of guide channels (45) are opened between the separation channels (42) and their corresponding drain troughs (43).

3. A landfill gas collection device according to claim 2, characterized in that, The bottom of the separation cylinder (4) is fixedly connected to multiple sets of return pipes (46). The top end of the return pipe (46) is connected to the bottom of the inner cavity of the liquid collection tank (44). The bottom end of the return pipe (46) extends through to the top cylinder (2). A one-way valve is provided inside the return pipe (46).

4. A landfill gas collection device according to claim 2, characterized in that, The deodorization unit includes a spherical cylinder (5), which is fixedly connected to the suction pipe (3) and communicates with the suction pipe (3). A spherical disk (51) is rotatably connected inside the spherical cylinder (5). An adsorption chamber (52) is opened in the middle of the spherical disk (51). Acceleration channels (53) are symmetrically opened on both sides of the spherical disk (51). The two ends of the acceleration channels (53) are respectively connected to the inner cavity of the spherical cylinder (5) and the adsorption chamber (52).

5. A landfill gas collection device according to claim 4, characterized in that, A first magnetic ring (47) is rotatably sleeved on the outer wall of the separation cylinder (4). The first magnetic ring (47) is magnetically attracted to the centrifugal disk (41). A first inclined ring (48) is fixedly connected to the outer arc wall of the first magnetic ring (47). A second magnetic ring (54) is rotatably sleeved on the outer wall of the spherical disk (51). The second magnetic ring (54) is magnetically attracted to the spherical disk (51). A second inclined ring (55) is fixedly connected to the outer arc wall of the second magnetic ring (54). A drive motor (6) is fixedly connected to the side wall of the top cylinder (2). A friction roller (61) is fixedly connected to the output end of the drive motor (6). The friction roller (61) is in contact with the inclined surfaces of the first inclined ring (48) and the second inclined ring (55) respectively. That is, the friction roller (61) can synchronously drive the first inclined ring (48) and the second inclined ring (55) to rotate.

6. A landfill gas collection device according to claim 4, characterized in that, Both the separation channel (42) and the acceleration channel (53) adopt a spiral design.

7. A landfill gas collection device according to claim 1, characterized in that, The drainage section includes a drain pipe (7), which is fixedly connected inside the air guide pipe (21). The inlet end of the drain pipe (7) extends into the fine filter sleeve (22), and the outlet end of the drain pipe (7) penetrates into the outer wall of the air guide pipe (21). A drain pump (71) is installed on the outlet end side of the drain pipe (7).

8. A landfill gas collection device according to claim 7, characterized in that, The piston part includes a piston box (8), which is fixedly connected to the suction pipe (3) and communicates with the suction pipe (3). A piston plate (81) is slidably connected inside the cavity of the piston box (8). An electric cylinder (82) is fixedly connected to the top of the piston box (8). The telescopic end of the electric cylinder (82) extends into the piston box (8) and is fixedly connected to the top of the piston plate (81). A one-way valve is provided in the suction pipe (3) on both sides of the piston box (8).

9. A landfill gas collection device according to claim 8, characterized in that, The top cylinder (2), drain pipe (7) and air extraction pipe (3) are together wrapped and fixed with a protective box (9). A vent window (91) is installed on one side of the protective box (9). The top two sides of the piston box (8) are respectively fixed and connected with a first conduit (92) and a second conduit (93). The other end of the first conduit (92) is connected to the inner cavity of the protective box (9), and the other end of the second conduit (93) is connected to the atmospheric environment. A one-way valve is provided in both the first conduit (92) and the second conduit (93).

10. A landfill gas collection device according to claim 1, characterized in that, The inner wall of the filter cylinder (1) is fixedly connected with geotextile, and a filter chamber is opened inside the filter cylinder (1), and the filter chamber is filled with gravel.

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