A stable extraction and injection device and method for landfill gas in a domestic waste landfill site

Abstract

The present application relates to a kind of domestic waste landfill gas stable pumping device and pumping method, device includes tank, spiral air extraction part and air extractor;Positioning slot is opened in the lateral wall of tank, and the orientation of positioning slot is tangent to the inner wall of tank;Spiral air extraction part includes mutually connected spiral segment and straight section, spiral segment is located in tank, and spiral segment is attached to the inner wall of tank, and vent hole is opened in spiral segment, and the end of straight section away from spiral segment is detachably fixed in positioning slot;Air extractor is connected with the end of straight section fixed in positioning slot, for extracting gas in tank through vent hole.By installing spiral air extraction part in tank, and make the straight section of spiral air extraction part fixed in the positioning slot through the lateral wall of tank, when flammable and explosive gas or contaminated gas is generated in the interior of tank, start air extractor to extract gas in tank, avoid a large amount of gas aggregation and produce explosion in the case that possibly contact with fire point, higher safety.

Description

Technical Field

[0001] This invention relates to waste gas treatment equipment, and in particular to a landfill gas stabilization injection device and injection method for municipal solid waste landfills. Background Technology

[0002] Landfills are places where waste is disposed of by burying. Since the location of landfills should follow the principles of safety to prevent pollution and economic rationality, and comply with the overall urban plan, regional environmental plan, urban environmental sanitation professional plan and related plans, landfills are usually far away from residential areas and are generally spacious sites or deep pits.

[0003] In addition, there is currently a method of concentrating the waste in a container and then burying the container directly in a landfill. This method is more convenient when burying waste, and the waste-containing containers can be disposed of in a regular manner according to the structure of the pit, which saves space.

[0004] However, for household waste containing a wide variety of types, whether it is directly piled up in a pit or concentrated in a container, the accumulation of a large amount of waste may cause fermentation and produce flammable gas. This gas will concentrate in the pit or container, and once it comes into contact with a ignition point, it may cause an explosion, which is very dangerous. Summary of the Invention

[0005] Therefore, it is necessary to provide a landfill gas stabilization injection device and injection method for municipal solid waste landfills to address the above-mentioned technical problems. The device is equipped with a spiral gas extraction component to extract flammable, explosive or polluting gases from inside the tank, thereby preventing a large amount of gas from accumulating inside the tank and causing an explosion if it comes into contact with a ignition point, thus ensuring higher safety.

[0006] This invention provides a landfill gas stabilization injection device for municipal solid waste landfills, comprising:

[0007] The tank body has a positioning groove on its side wall, and the orientation of the positioning groove is tangent to the inner wall of the tank body;

[0008] A spiral suction component includes a spiral section and a straight section connected to each other. The spiral section is located inside the tank and fits against the inner wall of the tank. A vent hole is provided on the spiral section. The end of the straight section away from the spiral section is detachably fixed in the positioning groove.

[0009] An air extraction device is connected to one end of the straight section that is fixed in the positioning groove, and is used to extract the gas inside the tank through the vent.

[0010] In one embodiment, the spiral suction component is elastic, and the maximum diameter of the spiral segment is not less than the inner diameter of the tank when not subjected to external force.

[0011] In one embodiment, the spiral suction component has at least two surfaces, a first surface and a second surface, the first surface being in contact with the inner wall of the tank, and the second surface facing the center of the tank; one end of the spiral suction component is provided with a mounting hole, the mounting hole extending along the length of the spiral suction component to the other end of the spiral suction component, and the second surface of the spiral segment is provided with a plurality of ventilation holes at intervals, and the plurality of ventilation holes are all connected to the mounting hole.

[0012] In one embodiment, the plurality of vent holes are located on the underside of the second surface of the spiral segment, and the vent holes are inclined downward and toward the center of the tank.

[0013] In one embodiment, a water-drawing pipe is movably inserted into the mounting hole, with one end of the water-drawing pipe protruding from the end of the spiral section away from the straight section and placed on the bottom surface of the tank body.

[0014] In one embodiment, the second surface of the spiral segment is provided with a mounting groove, the mounting groove is arranged along the length direction of the spiral segment, and the two ends of the mounting groove respectively extend to the two ends of the spiral air extraction component. The mounting groove is connected to the vent hole, and a breathable pad is movably inserted into the mounting groove.

[0015] In one embodiment, the positioning groove includes a first positioning groove and a second positioning groove that are interconnected. The port of the first positioning groove is located inside the port of the second positioning groove. The first positioning groove is closer to the inner wall of the tank, and the second positioning groove is closer to the outer wall of the tank. The end of the straight section away from the spiral section is detachably fixed in the first positioning groove, and a sealing block is installed in the second positioning groove.

[0016] In one embodiment, a connecting pipe is fixed to the sealing block, one end of which passes through the sealing block and is opposite to the mounting hole of the straight section, and the other end of which is bent and oriented away from the tank.

[0017] This invention also provides a method for landfill gas stabilization injection in municipal solid waste landfills, comprising:

[0018] Insert the end of the spiral segment away from the straight segment into the tank along the positioning groove until the end of the straight segment away from the spiral segment is located in the positioning groove.

[0019] Connect the vacuum pump to one end of the straight section that is fixed in the positioning groove, and start the vacuum pump to extract the gas from the tank.

[0020] In one embodiment, the method further includes:

[0021] Insert one end of the water pumping pipe along the mounting hole, so that one end of the water pumping pipe protrudes from the end of the spiral section away from the straight section and is placed on the bottom surface of the tank body;

[0022] Insert one end of the venting pad along the mounting groove to separate the vent from the waste inside the tank, thus preventing waste from entering the vent.

[0023] The aforementioned landfill gas stabilization and injection device and its injection method for municipal solid waste landfills utilize a spiral gas extraction component installed inside the tank. The straight section of the spiral gas extraction component is fixed in a positioning groove that runs through the side wall of the tank. When flammable, explosive, or polluting gases are generated inside the tank due to the long-term accumulation and fermentation of municipal solid waste, the gas extraction machine can be activated to extract the gas from the tank through the vent on the spiral gas extraction component. This prevents a large amount of gas from accumulating and potentially exploding if it comes into contact with a ignition point, thus ensuring higher safety. By setting the positioning groove tangentially to the inner wall of the tank, during installation, the spiral section of the spiral suction component needs to be inserted into the tank. Force is applied to the straight section of the spiral suction component, causing a slight bend until it can be accommodated within the tank along with the spiral section. The spiral suction component is then pushed towards the bottom of the tank until the end of the straight section furthest from the spiral section is at the same level as the positioning groove. At this point, the spiral suction component is rotated to adjust the position of the straight section, so that the end furthest from the spiral section faces the positioning groove. The spiral suction component is then rotated again to move the straight section towards the positioning groove. When the end of the straight section reaches the positioning groove, it is no longer compressed by the inner wall of the tank and can be inserted into the positioning groove. This structure allows for the installation of a top cover on the tank to prevent waste overflow, ensures high structural integrity of the spiral suction component, and makes assembly and disassembly smoother and more convenient.

[0024] Because the spiral suction component is elastic, during installation, one end of the spiral section can be inserted into the positioning groove, and the component can be inserted into the tank along the groove until the straight end furthest from the spiral section is within the groove. This installation method can be performed even if there are obstructions inside the tank, preventing the spiral suction component from being unable to be installed due to these obstructions. Since the maximum diameter of the spiral section is not less than the inner diameter of the tank, when the spiral section is installed inside the tank, it will fit tightly against the inner wall, effectively preventing debris from getting stuck between the inner wall and the spiral section. This also allows the spiral section to stably bend downwards along the inner wall of the tank until it is fully installed, making the installation process relatively more stable.

[0025] Because of the diverse types of household waste, liquid may seep out from the tank where a large amount of waste accumulates, eventually forming a large pool of sewage at the bottom and exacerbating the fermentation of polluting gases. Therefore, by inserting a suction pipe along the mounting hole until one end protrudes beyond the straight section of the spiral section and is placed on the ground inside the tank, the sewage accumulated at the bottom of the tank is also drawn out along the suction pipe when the vacuum pump is used for gas extraction. This prevents sewage accumulation from further aggravating the fermentation of polluting gases. Furthermore, since the suction pipe is inserted along the mounting hole, and one end of the mounting hole is exposed to the external environment through a positioning groove, it can be easily removed and cleaned after sewage extraction to ensure no contaminant residue remains inside the pipe.

[0026] An installation groove is made at the position where the vent is located on the second surface of the spiral section, and the installation groove is connected to the vent. The vent is separated from the external environment by the installation groove. Then, the vent pad is inserted into the installation groove on the straight section of the spiral air extraction component fixed to the positioning groove until the vent pad blocks all the surfaces of the vent. This effectively prevents small debris in the tank from being attracted by the airflow and entering or getting stuck in the vent during the operation of the air extraction machine. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the tank structure provided by the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the spiral air extraction component provided by the present invention;

[0030] Figure 3 A schematic diagram of the forces acting on the spiral air extraction component under natural conditions provided by the present invention;

[0031] Figure 4 Provided by the present invention Figure 2 Schematic diagram of the structure at point B;

[0032] Figure 5 Provided by the present invention Figure 1 Schematic diagram of the structure at point A;

[0033] Figure 6 This is a schematic diagram of the connecting pipe provided by the present invention;

[0034] Figure 7A schematic diagram of the deflection blade provided by the present invention;

[0035] Figure 8 Provided by the present invention Figure 7 Schematic diagram of the structure at point C;

[0036] Figure 9 A flowchart of the injection method of the apparatus provided by the present invention.

[0037] Figure label:

[0038] 110. Tank body; 111. First positioning groove; 112. Second positioning groove; 120. Top cover; 200. Spiral suction component; 210. Spiral section; 211. Mounting hole; 212. Vent hole; 213. Mounting groove; 220. Straight section; 300. Water suction pipe; 400. Air vent; 510. Sealing block; 520. Connecting pipe; 610. First connecting rod; 620. Rotating ring; 630. First one-way tooth; 640. Deflecting blade; 650. Second connecting rod; 660. Moving ring; 661. Slot; 670. Second one-way tooth; 680. Locking block. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0040] The following is combined with Figures 1-9 This invention describes a landfill gas stabilization injection device and injection method for municipal solid waste landfills.

[0041] like Figures 1 to 4 As shown, in one embodiment, a landfill gas stabilization and injection device for municipal solid waste landfills includes a tank 110, a spiral extraction component 200, and an extraction machine. A positioning groove is provided on the side wall of the tank 110, the orientation of which is tangent to the inner wall of the tank 110. The spiral extraction component 200 includes a spiral section 210 and a straight section 220 connected to each other. The spiral section 210 is located inside the tank 110 and fits against the inner wall of the tank 110. A vent hole 212 is provided on the spiral section 210. One end of the straight section 220 away from the spiral section 210 is detachably fixed in the positioning groove. The extraction machine is connected to the end of the straight section 220 fixed in the positioning groove and is used to extract gas from the tank 110 through the vent hole 212.

[0042] Specifically, a positioning groove is made on the upper side wall of the tank 110, with the orientation of the positioning groove tangent to the inner wall of the tank 110. From a top-down view, the inner wall of the tank 110 is circular. The side of the positioning groove furthest from the inside of the tank 110 extends through to and connects to the inner wall of the tank 110, thus achieving tangency. If the spiral suction component 200 is made of a relatively hard material, during installation, the spiral section 210 of the spiral suction component 200 is inserted into the tank 110, and force is applied to the straight section 220 of the spiral suction component 200, causing it to be slightly bent until it can be accommodated together with the spiral section 210 within the tank 110. Then, the spiral suction component 200 is pushed towards the bottom of the tank 110 until the end of the straight section 220 furthest from the spiral section 210 is at the same horizontal level as the positioning groove. At this point, rotate the spiral suction component 200 to adjust the position of the straight section 220, so that the end of the straight section 220 away from the spiral section 210 faces the positioning groove. Then rotate the spiral suction component 200 again to move the straight section 220 towards the positioning groove. When the end of the straight section 220 moves into the positioning groove, the straight section 220 is no longer squeezed by the inner wall of the tank 110 and can be inserted into the positioning groove. When the tank 110 is filled with various kinds of domestic waste and produces flammable, explosive, or polluting gases such as biogas after long-term fermentation, connect the suction machine to the straight section 220 fixed in the positioning groove and start the suction machine to extract the gas inside the tank 110 through the vent 212.

[0043] The aforementioned landfill gas stabilization and injection device for municipal solid waste landfills, by installing a spiral suction component 200 inside the tank 110 and fixing the straight section 220 of the spiral suction component 200 in a positioning groove that penetrates the side wall of the tank 110, can extract flammable, explosive or polluting gases from the tank 110 through the vent 212 on the spiral suction component 200 when flammable, explosive or polluting gases are generated inside the tank 110 due to the long-term accumulation and fermentation of municipal solid waste. This avoids the accumulation of large amounts of gas and prevents an explosion in the event of contact with a ignition point, thus ensuring higher safety. By setting the positioning groove tangentially to the inner wall of the tank 110, during installation, the spiral segment 210 of the spiral suction component 200 needs to be inserted into the tank 110, and force is applied to the straight segment 220 of the spiral suction component 200 to slightly bend it until it can be accommodated in the tank 110 along with the spiral segment 210. Then, the spiral suction component 200 is pushed towards the bottom of the tank 110 until the end of the straight segment 220 away from the spiral segment 210 is at the same horizontal level as the positioning groove. At this point, the spiral suction component 200 is rotated. 0. Adjust the position of the straight section 220 so that the end of the straight section 220 away from the spiral section 210 faces the positioning groove. Then rotate the spiral suction component 200 to move the straight section 220 toward the positioning groove. When the end of the straight section 220 moves to the positioning groove, the straight section 220 is no longer squeezed by the inner wall of the tank 110 and can be inserted into the positioning groove. This structure allows the top cover 120 to be installed on the top of the tank 110 to prevent garbage from overflowing. It also makes the spiral suction component 200 structurally intact and makes disassembly and assembly smoother and more convenient.

[0044] In one embodiment, the present invention provides a landfill gas stabilization injection device for municipal solid waste landfills, wherein the spiral extraction component 200 is elastic, and the maximum diameter of the spiral section 210 is not less than the inner diameter of the tank 110 when not subjected to external force.

[0045] Specifically, because the spiral suction component 200 is elastic, when installing it, one end of the spiral segment 210 of the spiral suction component 200 can be inserted into the positioning groove, and the spiral suction component 200 can be inserted into the tank 110 along the positioning groove until the end of the straight segment 220 away from the spiral segment 210 is located in the positioning groove. This installation method can be performed even if there are obstructions inside the tank 110, avoiding the inability to install the spiral suction component 200 due to obstructions inside the tank 110. Since the maximum diameter of the spiral segment 210 is not less than the inner diameter of the tank 110, when the spiral segment 210 is installed inside the tank 110, the spiral segment 210 will fit tightly against the inner wall of the tank 110, such as... Figure 3As shown, this design effectively prevents garbage from getting stuck between the inner wall of the tank 110 and the spiral section 210. It also allows the spiral suction component 200 to bend steadily downwards along the inner wall of the tank 110 until it is installed in place when it is inserted into the tank 110. This makes the installation process more stable.

[0046] In one embodiment, the present invention provides a landfill gas stabilization injection device for municipal solid waste landfills. The spiral suction component 200 has at least two surfaces, a first surface and a second surface. The first surface is in contact with the inner wall of the tank 110, and the second surface faces the center of the tank 110. One end of the spiral suction component 200 is provided with a mounting hole 211, which extends along the length of the spiral suction component 200 to the other end. The second surface of the spiral segment 210 is provided with a plurality of ventilation holes 212 at intervals, and the plurality of ventilation holes 212 are all connected to the mounting hole 211.

[0047] Specifically, the first surface is flat and can fit against the inner wall of the tank 110, the second surface is curved, and the two ends of the second surface are connected to the two ends of the first surface, with the middle of the second surface being far from the first surface, thus forming a protrusion. Since the spiral suction component 200 is made of an elastic material such as rubber, the spiral suction component 200 can be integrally injection molded.

[0048] In one embodiment, the present invention provides a landfill gas stabilization injection device for municipal solid waste landfills, wherein a plurality of vent holes 212 are located on the lower side of the second surface of the spiral section 210, and the vent holes 212 are inclined downward and toward the center of the tank 110.

[0049] Specifically, when garbage is disposed of, it may come into contact with the upper side of the second surface of the spiral section 210. Therefore, by opening the vent 212 on the lower side of the second surface of the spiral section 210, it is possible to effectively prevent garbage from entering the vent 212 and causing blockage when it is disposed of into the tank 110.

[0050] In one embodiment, the present invention provides a landfill gas stabilization injection device for municipal solid waste landfills, wherein a water pumping pipe 300 is movably inserted into the mounting hole 211, and one end of the water pumping pipe 300 protrudes from the end of the spiral section 210 away from the straight section 220 and is placed on the bottom surface of the tank body 110.

[0051] Specifically, due to the diverse types of household waste, liquid may seep out from the tank 110 where a large amount of waste accumulates, eventually pooling at the bottom of the tank 110 to form a large area of ​​sewage, thus exacerbating the fermentation of polluting gases. Therefore, by inserting the suction pipe 300 along the mounting hole 211 until one end of the suction pipe 300 protrudes beyond the straight section 220 of the spiral section 210 and is placed on the ground inside the tank 110, the sewage pooling at the bottom of the tank 110 will also be extracted by the pump along the suction pipe 300 when the pump is injecting gas. This prevents sewage accumulation from exacerbating the fermentation of polluting gases. Furthermore, since the suction pipe 300 is inserted along the mounting hole 211, and one end of the mounting hole 211 is exposed to the external environment through a positioning groove, the suction pipe 300 can be removed and cleaned at any time after sewage extraction to ensure that no pollutants remain inside the suction pipe 300.

[0052] It should be noted that the vacuum pump in this embodiment can be replaced by any device that can provide negative pressure inside the tank 110, such as a water pump. In other words, the vacuum pump is equivalent to a water pump, and both can pump gas or liquid into the tank 110.

[0053] In one embodiment, the present invention provides a landfill gas stabilization injection device for municipal solid waste landfills. The second surface of the spiral section 210 is provided with an installation groove 213. The installation groove 213 is arranged along the length direction of the spiral section 210, and the two ends of the installation groove 213 are respectively connected to the two ends of the spiral extraction component 200. The installation groove 213 is connected to the vent hole 212, and a breathable pad 400 is movably inserted into the installation groove 213.

[0054] Specifically, an installation groove 213 is provided at the position where the vent 212 is provided on the second surface of the spiral section 210, and the installation groove 213 is connected to the vent 212. The vent 212 is separated from the external environment by the installation groove 213. Then, the vent pad 400 is inserted into the installation groove 213 on the straight section 220 of the spiral suction component 200 fixed to the positioning groove until the vent pad 400 blocks all the surfaces of the vent 212. This effectively prevents small debris in the tank 110 from being attracted by the airflow and entering or getting stuck in the vent 212 during the operation of the suction machine.

[0055] like Figure 5 and Figure 6As shown in one embodiment, the present invention provides a landfill gas stabilization injection device for municipal solid waste landfills. The positioning groove includes a first positioning groove 111 and a second positioning groove 112 that are interconnected. The port of the first positioning groove 111 is located inside the port of the second positioning groove 112. The first positioning groove 111 is close to the inner wall of the tank 110, and the second positioning groove 112 is close to the outer wall of the tank 110. The end of the straight section 220 away from the spiral section 210 is detachably fixed in the first positioning groove 111. A sealing block 510 is installed in the second positioning groove 112.

[0056] Specifically, since the port of the first positioning groove 111 is located inside the port of the second positioning groove 112, and the second positioning groove 112 is used to install the sealing block 510, and the first positioning groove 111 is used to snap and fix one end of the straight section 220 of the spiral suction component 200, and due to the elasticity of the spiral suction component 200 and the fact that the maximum diameter of the spiral suction component 200 is not less than the inner diameter of the tank body 110, when the sealing block 510 is installed in the second positioning groove 112, the surface of the sealing block 510 is also tightly fitted with the bottom surface of the second positioning groove 112 and one end of the spiral suction component 200, respectively, thereby ensuring that the end of the spiral suction component 200 located in the positioning groove will not communicate with the inside of the tank body 110 through the positioning groove.

[0057] In one embodiment, the present invention provides a landfill gas stabilization injection device for municipal solid waste landfills, wherein a connecting pipe 520 is fixed on a sealing block 510, one end of the connecting pipe 520 passes through the sealing block 510 and is opposite to the mounting hole 211 of the straight section 220, and the other end of the connecting pipe 520 is bent and oriented away from the tank 110.

[0058] Specifically, since the sealing block 510, when installed in the second positioning groove 112, prevents the mounting hole 211 of the spiral suction component 200 from reconnecting with the interior of the tank 110 through the first positioning groove 111, a bent connecting pipe 520 is installed through the sealing block 510. One end of the connecting pipe 520 is connected to the mounting hole 211, and the other end is located outside the tank 110 for connection to the suction machine. Since the positioning groove is tangent to the inner wall of the tank 110, the end of the connecting pipe 520 located outside the tank 110 is bent away from the tank 110 to facilitate the subsequent connection of the corresponding equipment to the connecting pipe 520 and to prevent the installation progress from being affected by proximity to the outer wall of the tank 110.

[0059] like Figure 7 and Figure 8As shown in one embodiment, the landfill gas stabilization injection device for municipal solid waste landfills provided by the present invention further includes multiple coaxially arranged and interconnected flat-laying components. Each flat-laying component includes a first connecting rod 610, a rotating ring 620, deflecting blades 640, a second connecting rod 650, and a moving ring 660. The rotating ring 620 is rotatably mounted on the top of the first connecting rod 610. Multiple deflecting blades 640 are circumferentially arranged on the rotating ring 620, and each deflecting blade 640 has two side ends, one high and one low. The second connecting rod 650 is located directly above the first connecting rod 610. A locking block 680 is longitudinally arranged on the side wall of the second connecting rod 650. A slot 661 matching the locking block 680 is longitudinally opened on the inner wall of the moving ring 660. The moving ring 660 is longitudinally movably mounted on the lower end of the second connecting rod 650 through the matching locking block 680 and slot 661. The top surface of the rotating ring 620 is provided with a first one-way tooth 630, and the bottom surface of the moving ring 660 is provided with a second one-way tooth 670 that matches the first one-way tooth 630.

[0060] Specifically, when the second connecting rod 650 rotates in one direction, the first one-way tooth 630 and the second one-way tooth 670 engage with each other, causing the rotating ring 620 to rotate, thereby driving the deflecting blade 640 to rotate. At this time, the rotation direction of the deflecting blade 640 is from the lower end of the deflecting blade 640 to the higher end of the deflecting blade 640, which can effectively level the garbage in the tank 110 and avoid interference between the deflecting blade 640 and the garbage. When the second connecting rod 650 rotates in another direction, a longitudinal thrust is generated between the second one-way tooth 670 and the first one-way tooth 630, causing the moving ring 660 to move upward longitudinally, while the rotating ring 620 remains stationary.

[0061] like Figure 9 As shown, in one embodiment, the landfill gas stabilization injection method for municipal solid waste landfills provided by the present invention is applied to the aforementioned landfill gas stabilization injection device for municipal solid waste landfills, and includes the following steps:

[0062] S910, insert the end of the spiral section 210 away from the straight section 220 into the tank 110 along the positioning groove until the end of the straight section 220 away from the spiral section 210 is located in the positioning groove.

[0063] S920, insert one end of the water pump 300 along the mounting hole 211, so that one end of the water pump 300 protrudes from the end of the spiral section 210 away from the straight section 220 and is placed on the bottom surface of the tank body 110.

[0064] S930, insert one end of the venting pad 400 along the mounting groove 213 to separate the vent 212 from the garbage inside the tank 110 and prevent garbage from entering the vent 212.

[0065] S940, connect the vacuum pump to one end of the straight section 220 that is fixed in the positioning groove, and start the vacuum pump to extract the gas from the tank 110.

[0066] The aforementioned landfill gas stabilization injection method for municipal solid waste landfills allows for the extraction of flammable, explosive, or polluting gases from tank 110 when flammable, explosive, or polluting gases are generated due to prolonged accumulation and fermentation of municipal solid waste. This is achieved by activating the gas extractor, which extracts the gas through the vent 212 on the spiral extractor component 200, preventing large amounts of gas from accumulating and potentially exploding upon contact with a ignition point, thus enhancing safety. Furthermore, due to the elasticity of the spiral extractor component 200, during installation, one end of the spiral section 210 is inserted into the positioning groove, and the component is inserted into the tank 110 along the groove until the end of the straight section 220 furthest from the spiral section 210 is located within the groove. This installation method allows for installation even when there are obstructions inside the tank 110, preventing the spiral extractor component 200 from being unable to be installed due to such obstructions. Since the maximum diameter of the spiral section 210 is not less than the inner diameter of the tank 110, when the spiral section 210 is installed inside the tank 110, it will fit tightly against the inner wall of the tank 110. This effectively prevents garbage from getting stuck between the inner wall of the tank 110 and the spiral section 210. It also allows the spiral suction component 200 to bend steadily downwards along the inner wall of the tank 110 until it is installed in place when it is inserted into the tank 110. The installation process is relatively more stable.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A stable injection and extraction device for landfill gas in a domestic waste landfill site, characterized in that, The device comprises: a tank body, a positioning slot is formed on the side wall of the tank body, and the orientation of the positioning slot is tangent to the inner wall of the tank body; a spiral air extraction member, which comprises a spiral segment and a straight segment connected with each other, the spiral segment is located in the tank body and is in close contact with the inner wall of the tank body, a ventilation hole is formed on the spiral segment, and the end of the straight segment away from the spiral segment is detachably fixed in the positioning slot; an air extractor, which is connected with the end of the straight segment fixed in the positioning slot, and is used for extracting the gas in the tank body through the ventilation hole; the spiral air extraction member has elasticity, and the maximum diameter of the spiral segment is not less than the inner diameter of the tank body under the condition that no external force is applied; the spiral air extraction member has at least two surfaces, i.e., a first surface and a second surface, the first surface is in close contact with the inner wall of the tank body, and the second surface is directed to the center of the tank body, an installation hole is formed on one end of the spiral air extraction member, the installation hole penetrates through the other end of the spiral air extraction member along the length direction of the spiral air extraction member, the second surface of the spiral segment is spaced apart to form a plurality of ventilation holes, and the plurality of ventilation holes are all in communication with the installation hole; a water extraction pipe is movably inserted in the installation hole, one end of the water extraction pipe protrudes from the end of the spiral segment away from the straight segment and is placed on the inner bottom surface of the tank body; an installation slot is formed on the second surface of the spiral segment, the installation slot is arranged along the length direction of the spiral segment, the two ends of the installation slot penetrate through the two ends of the spiral air extraction member respectively, the installation slot is in communication with the ventilation hole, and a breathable pad is movably inserted in the installation slot; the device further comprises a plurality of flatly arranged components arranged coaxially and connected with each other, each flatly arranged component comprises a first connecting rod, a rotating ring, a deflection blade, a second connecting rod and a moving ring, the rotating ring is rotatably installed on the top end of the first connecting rod, a plurality of deflection blades are circumferentially arranged on the rotating ring, and each deflection blade has a high side end and a low side end, the second connecting rod is located directly above the first connecting rod, a clamping block is longitudinally arranged on the side wall of the second connecting rod, a clamping groove matched with the clamping block is longitudinally formed on the inner wall of the moving ring, and the moving ring is longitudinally movably installed on the lower end of the second connecting rod through the matched clamping block and clamping groove; a first one-way tooth is arranged on the top surface of the rotating ring, and a second one-way tooth matched with the first one-way tooth is arranged on the bottom surface of the moving ring; when the air extractor extracts the gas, the sewage gathered on the inner bottom of the tank body is also extracted by the air extractor along the water extraction pipe, so that the sewage accumulation is avoided to prevent the fermentation of the polluted gas.

2. The stable injection and extraction device for landfill gas of the domestic waste landfill site according to claim 1, characterized in that, The plurality of ventilation holes are all located on the lower side of the second surface of the spiral segment, and the ventilation holes are inclined downward and directed to the center of the tank body.

3. The device according to claim 1, wherein the device is characterized by, The positioning slot comprises a first positioning slot and a second positioning slot connected with each other, the port of the first positioning slot is located in the port of the second positioning slot, the first positioning slot is close to the inner wall of the tank body, the second positioning slot is close to the outer wall of the tank body, the end of the straight segment away from the spiral segment is detachably fixed in the first positioning slot, and a sealing block is installed in the second positioning slot.

4. The device according to claim 3, wherein the device is characterized by, The connecting pipe is fixed on the sealing block, one end of the connecting pipe penetrates through the sealing block and is opposite to the mounting hole of the straight section, and the other end of the connecting pipe is bent and faces away from the tank body.

5. A method for stable extraction and injection of landfill gas from a municipal solid waste landfill, applied to the device for stable extraction and injection of landfill gas from a municipal solid waste landfill according to claim 1, characterized in that, Comprise: Inserting one end of the spiral section away from the straight section into the tank body along the positioning groove until the end of the straight section away from the spiral section is located in the positioning groove; Connecting the air extractor with the end of the straight section fixed in the positioning groove and starting the air extractor to extract the gas in the tank body.

6. The method according to claim 5, wherein the method is characterized by, Also comprise: Inserting one end of the water extractor along the mounting hole so that the end of the water extractor protrudes from the end of the spiral section away from the straight section and is placed on the bottom surface of the tank body; Inserting one end of the air permeable pad along the mounting groove so that the air passage is separated from the garbage inside the tank body, avoiding garbage entering the air passage.

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