Large-flow vertical shaft grading guide and drainage process for deep percolate of landfill site

Abstract

The invention relates to the field of leachate treatment, and provides a high-flow vertical shaft grading guide and discharge process for landfill deep leachate, which comprises the following steps of: 1, drilling a well hole with the inner diameter of 1000mm in a garbage body by using a drilling machine; secondly, a guide and drainage structure with the multi-height graded water inlet capacity is installed in the well hole, the guide and drainage structure comprises an HDPE well pipe, a plurality of circles of pipe hole sets are formed in the HDPE well pipe, the multiple circles of pipe hole sets are distributed all over the HDPE well pipe at different heights, and one circle of pipe hole set comprises a plurality of pipe hole bodies; and thirdly, the pump body is connected to the stable protection device, and the stable protection device is conveyed into the bottom wall of the HDPE well pipe through the hoisting device to extract percolate. Through cooperative arrangement of the HDPE well casing and the stable protection device, the problem that well casing materials in a large-diameter vertical shaft are not matched is solved, and the technical problems that a pump body is lowered unstably, operation is prone to deviation, and maintenance is inconvenient are effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of leachate treatment, in particular to a large-flow vertical shaft grading drainage process for deep leachate in a landfill. BACKGROUND

[0002] The landfill will continuously produce leachate during operation, which is usually guided out to the ground surface for treatment by setting a vertical shaft in the garbage body and cooperating with the pumping body. At present, the vertical shaft structure for leachate drainage in the existing landfill still has the following shortcomings in actual application: Firstly, the well pipe in the existing vertical shaft is mostly made of galvanized steel pipe, which can meet the basic structural strength and use requirements in small-diameter vertical shafts. However, when the diameter of the vertical shaft increases and the depth increases, the galvanized steel pipe has large rigidity, large self-weight, and limited corrosion resistance. Under the combined action of long-term lateral load, garbage body settlement, and leachate corrosion, local deformation, corrosion thinning, and even structural failure are likely to occur, which is difficult to adapt to the long-term stable drainage requirements of large-diameter vertical shafts. Secondly, during the pumping process of the vertical shaft, the pump body is usually installed at the bottom of the well pipe by hoisting. Since the existing structure lacks effective stability and protection measures, the pump body is prone to rotation and swinging during lowering, which causes the pipe connected to the pump body to be entangled, the pump body to be knocked against the inner wall of the well pipe, and the pump body or the well pipe to be damaged. After the installation of the pump body is completed, the pump body is also prone to positional deviation under the action of vibration during operation, which affects the pumping stability and service life. SUMMARY

[0003] In view of the above technical problems, the present application aims to provide a large-flow vertical shaft grading drainage process for deep leachate in a landfill. To solve the above technical problems, the present application adopts the following technical scheme: A large-flow vertical shaft grading drainage process for deep leachate in a landfill, comprising the following steps: Step one, using a drilling machine to drill a well hole on the garbage body, the well hole has an inner diameter of 1000mm; Step two, installing a drainage structure with multi-height grading water inlet capacity in the well hole, the drainage structure includes an HDPE well pipe, the HDPE well pipe is provided with a plurality of pipe hole groups, the pipe hole groups are respectively distributed at different heights of the HDPE well pipe, and one pipe hole group includes a plurality of pipe hole bodies; Step three, connecting the pump body to the stability protection device, and using a hoisting device to send the stability protection device into the bottom wall of the HDPE well pipe to extract leachate.

[0004] Optionally, the stabilizing protection device has an installation cavity and a component cavity. A support frame is fixed to the inner wall of the installation cavity, and two clamping assemblies are slidably connected to the inner wall of the installation cavity. A roller assembly is fixed to the outer wall of the stabilizing protection device. A hanger and a rack are slidably connected to the stabilizing protection device. A damping guide rail is fixed to the inner wall of the component cavity, and an L-shaped push bar is slidably connected to the damping guide rail. The hanger and the rack extend into the component cavity. A limiting piece is fixed to the hanger, and the limiting piece is connected to the inner wall of the component cavity through an elastic element one. The rack is connected to the inner wall of the component cavity through an elastic element two. A roller assembly two is slidably connected to the extension rod. A toothed T-shaped limiting piece is slidably connected to the inner wall of the component cavity, and the toothed T-shaped limiting piece is connected to the inner wall of the component cavity through an elastic element three. A rotating plate and a transmission bar are rotatably connected to the inner wall of the component cavity. A passive ring is slidably connected to the transmission bar, and the passive ring is connected to the transmission bar through an elastic element four. An extension rod is rotatably connected to the rotating plate, and the extension rod is slidably connected to the transmission bar. The pump body is clamped and fixed using two clamping assemblies. Both roller assembly one and roller assembly two are in contact with the inner wall of the HDPE well pipe to prevent the pump body from rotating and bumping when it moves down, and to prevent the pump body from shifting due to vibration generated when it starts up.

[0005] Optionally, the hanger is fixedly connected with lifting lugs.

[0006] Optionally, the roller assembly 2 is provided with a locking mechanism 1, and the clamping assembly is provided with a locking mechanism 2.

[0007] Optionally, the transmission bar has a channel, and the extension rod is slidably connected to the inner wall of the channel.

[0008] Optionally, the clamping assembly is provided with a flexible buffer layer.

[0009] Optionally, both roller assembly one and roller assembly two are provided with an anti-slip layer.

[0010] Optionally, a ring of the tube hole group includes six tube holes, each with a diameter of 20 mm.

[0011] Optionally, the pump body is connected to the compressed air control system.

[0012] Optionally, the compressed air control system includes an air compressor and an air tank.

[0013] The present invention has the following beneficial effects: By coordinating the installation of HDPE well pipes and stabilization protection devices, not only is the problem of incompatible well pipe materials in large-diameter vertical shafts solved, but technical problems such as unstable pump lowering, easy deviation during operation, and inconvenient maintenance are also effectively solved, making the high-flow vertical shaft drainage process of deep leachate in landfills safer, more reliable, and easier to operate for a long time. Attached Figure Description

[0014] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the wellbore, drainage structure and stabilization protection device in a high-flow vertical well graded drainage process for deep leachate in landfills according to the present invention. Figure 2 This is a schematic diagram of the stabilizing and protective device in this invention; Figure 3 This is a structural schematic diagram of the stabilizing and protective device in this invention from another angle; Figure 4 This is an internal structural diagram of the stabilizing and protective device in this invention; Figure 5 This is a schematic diagram of the structure of some components inside the component cavity in this invention; Figure 6 This is a schematic diagram of the transmission bar and rotating plate in this invention.

[0016] Reference numerals: 1. Stabilizing and protective device; 2. Mounting cavity; 3. Support frame; 4. Clamping assembly; 5. Hanger; 6. Limiting plate; 7. Elastic component one; 8. Roller assembly one; 9. Roller assembly two; 10. Rack; 11. Elastic component two; 12. L-shaped push bar; 13. Damping guide rail; 14. Rotating plate; 15. Toothed T-shaped limiting component; 16. Elastic component three; 17. Transmission bar; 18. Elastic component four; 19. Passive ring; 20. Extension rod; 21. Component cavity; 22. HDPE well casing. Detailed Implementation

[0017] 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.

[0018] In the description of this invention, it should be noted that the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0019] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] Example 1:

[0021] like Figures 1-6 As shown, a high-flow-rate vertical shaft staged drainage process for deep landfill leachate includes the following steps: Step 1: Use a drilling rig to drill a well hole in the debris, with an inner diameter of 1000mm. Step 2: Install a guide structure with multi-height graded water intake capability in the wellbore. The guide structure includes HDPE well pipe 22. Multiple sets of pipe holes are opened on HDPE well pipe 22. The multiple sets of pipe holes are distributed at different heights of HDPE well pipe 22. Each set of pipe holes includes multiple pipe holes. Step 3: Connect the pump body to the stabilization and protection device 1, and use the hoisting device to send the stabilization and protection device 1 into the bottom wall of the HDPE well pipe 22 to extract the seepage fluid.

[0022] Large-diameter vertical shafts are flexible underground structures designed for long-term service. Their operating environment is characterized by uneven lateral loads, long-term settlement, and the coexistence of highly corrosive media. HDPE well pipe 22, with its corrosion resistance, flexibility, and continuous structural characteristics, can absorb uneven stress through elastic deformation, avoiding stress concentration and structural failure. In contrast, galvanized steel pipes, due to their high rigidity, susceptibility to corrosion, and heavy weight, present construction difficulties and insufficient long-term structural reliability under the aforementioned conditions. Therefore, HDPE well pipe 22 is mechanistically more suitable for large-diameter vertical shafts.

[0023] By distributing the perforated groups along the axial direction of the HDPE well pipe 22 at different heights, the leachate can enter the perforated groups at the corresponding heights according to its distribution depth within the waste body, achieving stratified collection and graded drainage of large-flow leachate. This structure avoids the problem of concentrated pumping load caused by water entering at a single point at the bottom of the well, allowing leachate at different depths to enter the well pipe simultaneously and evenly, which helps improve pumping stability and reduce the risk of blockage in the bottom area.

[0024] Before drilling, you can choose to pre-treat the solid waste in the landfill, such as by crushing the solid waste.

[0025] Based on the above scheme, in some embodiments, the stabilizing protection device 1 has an installation cavity 2 and a component cavity 21. A support frame 3 is fixedly connected to the inner wall of the installation cavity 2, and two clamping assemblies 4 are slidably connected to the inner wall of the installation cavity 2. A roller assembly 8 is fixedly connected to the outer wall of the stabilizing protection device 1. A hanger 5 and a rack 10 are slidably connected to the stabilizing protection device 1. A damping guide rail 13 is fixedly connected to the inner wall of the component cavity 21, and an L-shaped pusher 12 is slidably connected to the damping guide rail 13. Both the hanger 5 and the rack 10 extend into the component cavity 21. A limiting piece 6 is fixedly connected to the hanger 5, and the limiting piece 6 is connected to the component cavity 21 by an elastic element 7. The inner wall of cavity 21 is connected, and rack 10 is connected to the inner wall of component cavity 21 through elastic element 2 11. Roller assembly 2 9 is slidably connected to extension rod 20. Toothed T-shaped limiting element 15 is slidably connected to the inner wall of component cavity 21. Toothed T-shaped limiting element 15 is connected to the inner wall of component cavity 21 through elastic element 3 16. Rotating plate 14 and transmission bar 17 are rotatably connected to the inner wall of component cavity 21. Passive ring 19 is slidably connected to transmission bar 17. Passive ring 19 is connected to transmission bar 17 through elastic element 4 18. Extension rod 20 is rotatably connected to rotating plate 14. Extension rod 20 is slidably connected to transmission bar 17. The pump body is clamped and fixed by two clamping components 4. Roller assembly 1 8 and roller assembly 2 9 are both in contact with the inner wall of HDPE well pipe 22 to prevent the pump body from rotating and bumping when it moves down, and to prevent the pump body from shifting due to vibration generated when the pump body is started.

[0026] It is worth noting that the hanger 5 is fixedly connected with a lifting lug.

[0027] To achieve the component locking effect, the roller assembly 2 9 is provided with a locking mechanism 1, and the clamping assembly 4 is provided with a locking mechanism 2.

[0028] In a preferred embodiment, the transmission bar 17 has a channel, and the extension rod 20 is slidably connected to the inner wall of the channel.

[0029] In a preferred embodiment of the present invention, the clamping assembly 4 is provided with a flexible buffer layer.

[0030] Both roller assembly 8 and roller assembly 9 are provided with an anti-slip layer. The anti-slip layer can prevent excessive horizontal displacement when roller assembly 8 and roller assembly 9 move downward, thereby improving the anti-rotation effect.

[0031] Regarding the arrangement of the borehole group, one ring of the borehole group includes six boreholes, and the borehole diameter is 20mm.

[0032] Preferably, the guide structure further includes a mesh body, a reinforcing cage, and hard crushed stone; The installation steps of the guide structure include: installing the reinforcing cage inside the well hole, installing the mesh on the outer wall of the reinforcing cage, installing the HDPE well pipe 22 inside the reinforcing cage, and filling the space between the HDPE well pipe 22 and the reinforcing cage with hard crushed stone.

[0033] The mesh can be made of single-sided composite geotextile or double-layer nylon mesh.

[0034] The drainage structure can also include various existing pipes, on which water-saving valves can be installed.

[0035] Preferably, the pump body is connected to the compressed air control system.

[0036] The compressed air control system is located in the air compressor room on the ground. The compressed air control system uses compressed air to drain the leachate in the vertical shaft. The compressed air control system includes an air compressor, an air tank, and various connecting pipes.

[0037] An air compressor is a device used to generate and supply compressed air, while an air tank is used to store this compressed air.

[0038] As an alternative, the outer wall of the HDPE well pipe 22 can be covered with an impermeable layer, which can be made of EPDM rubber, and is used to waterproof, prevent corrosion and provide cushioning protection for the outer wall of the HDPE well pipe 22.

[0039] Working principle of stabilization and protection device 1: The pump body is placed on the top wall of the support frame 3 inside the installation cavity 2. The pump body is clamped and fixed by two clamping components 4. The length of the clamping components 4 is locked by the locking mechanism 2. The lifting lug on the lifting frame 5 is lifted by the hook of the lifting device. Due to the self-weight of the stabilizing and protective device 1, the lifting frame 5 will overcome the elastic force of the elastic element 7 and move upward relative to the stabilizing and protective device 1 until the limiting piece 6 and the top wall inside the component cavity 21 abut against each other.

[0040] The sliding roller assembly 29 is adjusted to increase the extension of the roller assembly 29 on the rack 10, so that the farthest distance between the roller assembly 18 and the roller assembly 29 is slightly greater than the inner diameter of the well hole. The locking mechanism 1 locks the roller assembly 29 and the rack 10, preventing the roller assembly 29 from sliding on the rack 10. The lower end of the vertical section of the L-shaped push bar 12 extends below the stabilizing protection device 1. The L-shaped push bar 12 does not fall off under the damping action of the damping guide rail 13. The horizontal section of the L-shaped push bar 12 remains in contact with the rotating plate 14.

[0041] The hoisting device places the stabilizing protection device 1 into the HDPE well pipe 22. Roller assembly 8 and roller assembly 9 are both in contact with the inner wall of the HDPE well pipe 22, and elastic element 11 is compressed. The hoisting device controls the stabilizing protection device 1 to move downward. During the downward movement of the stabilizing protection device 1, under the elastic force of elastic element 11, roller assembly 8 and roller assembly 9 maintain a certain pressure contact with the inner wall of the HDPE well pipe 22, thereby preventing the stabilizing protection device 1 from rotating significantly and preventing the multiple pipes connected to the pump body from becoming entangled. Since the inner wall of the HDPE well pipe 22 is not smooth and flat, roller assembly 9 can move slightly horizontally under the elastic force of elastic element 11, so that roller assembly 9 and roller assembly 8 can pass through the uneven parts of the inner wall of the HDPE well pipe 22, so that the stabilizing protection device 1 can move downward smoothly and stably without rotation.

[0042] When the lower end of the vertical section of the L-shaped pusher 12 abuts against the bottom wall of the HDPE well pipe 22, the L-shaped pusher 12 moves into the component cavity 21. The horizontal section of the L-shaped pusher 12 pushes the rotating plate 14 to rotate counterclockwise around the rotating shaft. The rotating plate 14 pushes the passive ring 19, causing the passive ring 19 to overcome the elastic force of the elastic element 18 and slide on the transmission bar 17. The transmission bar 17 rotates clockwise around the rotating shaft under the drive of the extension rod 20. When the rotating plate 14 and the transmission bar 17 are parallel, the L-shaped pusher 12 pushes the rotating plate 14 to rotate counterclockwise by a small amplitude. The elastic element 18 will quickly rebound and push the passive ring. 19. Reverse movement: The passive ring 19 drives the extension rod 20 and the rotating plate 14 to rotate counterclockwise quickly. The rotating plate 14 pushes the toothed T-shaped limiting member 15 to overcome the elastic force of the elastic member 3 16 and move upward. The teeth on the vertical section of the elastic member 3 16 insert into the teeth on the rack 10 to limit the rack 10, so that the rack 10 cannot move horizontally. At this time, the roller assembly 1 8 and the rack 10 still remain in contact with the inner wall of the HDPE well pipe 22. Therefore, when vibration occurs during the subsequent pump start-up process, the stabilizing protection device 1 is limited and will not be excessively offset.

[0043] Then, the stabilizing protection device 1 continues to move downwards until its bottom wall abuts against the bottom wall of the HDPE well pipe 22. At this time, the lifting hook of the lifting device still lifts the lifting lug on the lifting frame 5, and the limiting plate 6 remains in contact with the top wall of the component cavity 21. Because the weight of the stabilizing protection device 1 and the pump body is large enough, and the rollers on roller assembly 8 and roller assembly 9 can rotate, the stabilizing protection device 1 can continue to move downwards smoothly. During this process, the horizontal section of the L-shaped push bar 12 continues to move upwards from the right side of the rotating plate 14 to above the rotating plate 14.

[0044] The leachate can be extracted and recycled by turning on the pump. For example, it can be treated with water control agents, such as ammonia nitrogen removal agents, to remove ammonia nitrogen from the liquid. The specific working principle is based on existing technology and will not be described in detail here.

[0045] When the pump body needs to be inspected or cleaned, the hook of the lifting device moves down, so that the hanger 5 moves down under the elastic force of the elastic element 7. One end of the hanger 5 pushes the rotating plate 14, and the rotating plate 14 rotates clockwise around the rotating shaft. The transmission bar 17 rotates counterclockwise around the rotating shaft. When the rotating plate 14 and the transmission bar 17 are parallel, the hanger 5 pushes the rotating plate 14 to rotate clockwise by a small amplitude, so that the rotating plate 14 can quickly rotate clockwise until it abuts against the bottom wall of the component cavity 21. After the toothed T-shaped limiting member 15 loses the thrust of the rotating plate 14, it falls down under the elastic force of the elastic element 16, thereby releasing the limitation on the rack 10 so that the rack 10 can move horizontally, so that the subsequent stabilizing protection device 1 can move upward inside the HDPE well pipe 22.

[0046] Since the horizontal section of the L-shaped push bar 12 is already above the rotating plate 14, the rotating plate 14 will not come into contact with the horizontal section of the L-shaped push bar 12 when it rotates clockwise.

[0047] The lifting hook of the hoisting device moves upward, thereby causing the stabilizing protection device 1 to move the pump body upward. The same principle applies to the downward movement, so that the stabilizing protection device 1 and the pump body will not rotate, allowing the stabilizing protection device 1 to move stably upward. This allows the stabilizing protection device 1 and the pump body to be moved above the HDPE well pipe 22 for maintenance or cleaning.

[0048] The effects of this invention are as follows: By using HDPE well pipe 22 instead of traditional galvanized steel pipe, the vertical shaft guide structure is more suitable for large-diameter vertical shaft conditions. HDPE well pipe 22 has the characteristics of corrosion resistance, light weight and good flexibility. Under the combined effects of long-term settlement of garbage, uneven lateral load and leachate corrosion, it can release stress through elastic deformation, avoiding problems such as local buckling or corrosion thinning. This overcomes the defects of galvanized steel pipe in large-diameter, deep vertical shafts that are easy to deform and fail, and significantly improves the long-term stability and service life of the vertical shaft guide structure under large-diameter conditions. By installing a stabilizing protection device 1 on the outside of the pump body, the pump body is stably guided and protected during the descent process. The roller assembly 8 and roller assembly 9 installed on the outer wall of the stabilizing protection device 1 are always in contact with the inner wall of the HDPE well pipe 22 during the descent process, so that the stabilizing protection device 1 and the pump body inside it move axially stably in the well pipe. This effectively limits the rotation and large swing of the pump body during the descent process, prevents the multiple pipelines connected to the pump body from getting tangled, and avoids the pump body from colliding with the inner wall of the HDPE well pipe 22, thereby reducing the risk of damage to the pump body and well pipe and improving installation safety. Through the non-electric mechanical linkage structure within the stabilizing protection device 1, the pump body is automatically fixed and automatically released after it is in place. This locks the roller assembly 8 and keeps it in contact with the inner wall of the HDPE well pipe 22 in conjunction with the roller assembly 9. When the pump body starts and vibrates, the stabilizing protection device 1 is effectively limited to prevent the pump body from shifting during operation. The lifting device drives the lifting frame 5 to move, which in turn drives the rotating plate 14, the transmission bar 17, and the toothed T-shaped limiting piece 15 to move in the opposite direction. This automatically releases the limiting on the rack 10, allowing the roller assembly 8 and roller assembly 9 to return to an adjustable state. This enables the stabilizing protection device 1 and the pump body to move stably upward within the HDPE well pipe 22, preventing rotation or jamming during lifting. In summary, the coordinated installation of HDPE well pipe 22 and stabilization protection device 1 not only solves the problem of incompatibility of well pipe materials in large-diameter vertical shafts, but also effectively solves technical problems such as unstable pump lowering, easy deviation during operation, and inconvenient maintenance, making the high-flow vertical shaft drainage process of deep leachate in landfills safer, more reliable, and easier to operate for a long time.

[0049] Example 2: Based on Embodiment 1, 57 large-diameter vertical wells are set up for leachate drainage. The parameters of the 57 large-diameter vertical wells are shown in the table below:

[0050]

[0051]

[0052] In a compressed air control system, the main function of the air compressor is to compress the intake air and increase its pressure. During this process, the air is compressed to a higher pressure and then delivered to the pump body in a large-diameter well to provide a stable and large amount of compressed air.

[0053] The air compressor has a discharge capacity of 8m³. 3 The exhaust pressure is 0.8 MPa, the power is 55 kW, and the exhaust port is DN110.

[0054] Air tanks are used to store compressed air, providing an air supply for a period of time when the air compressor malfunctions or requires maintenance; they also act as a buffer to stabilize pressure fluctuations and protect downstream equipment from such fluctuations; air tanks are typically equipped with silencers to reduce noise generated during gas discharge; the gas inside the tank can reduce vibrations generated by the air compressor during discharge, thereby reducing fatigue damage to the equipment; and in some cases, air tanks can reduce the number of times the air compressor starts, thus saving energy.

[0055] The gas storage tank has a volume of 3m³. 3 The gas storage pressure is 1.0 MPa.

[0056] The components, modules, mechanisms, and devices in this invention that are not described in detail are all general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A high-flow-rate vertical shaft staged drainage process for deep leachate from landfills, characterized in that, Includes the following steps: Step 1: Use a drilling rig to drill a well hole in the debris, with an inner diameter of 1000mm. Step 2: Install a guide structure with multi-height graded water intake capability in the wellbore. The guide structure includes an HDPE well pipe (22). Multiple sets of pipe holes are opened on the HDPE well pipe (22). The multiple sets of pipe holes are distributed at different heights of the HDPE well pipe (22). Each set of pipe holes includes multiple pipe holes. Step 3: Connect the pump body to the stabilization and protection device (1), and use the hoisting device to send the stabilization and protection device (1) into the bottom wall of the HDPE well pipe (22) to extract the seepage fluid.

2. The high-flow-rate vertical shaft staged drainage process for deep landfill leachate according to claim 1, characterized in that, The stabilizing protection device (1) has an installation cavity (2) and a component cavity (21). A support frame (3) is fixed to the inner wall of the installation cavity (2). Two clamping assemblies (4) are slidably connected to the inner wall of the installation cavity (2). A roller assembly (8) is fixed to the outer wall of the stabilizing protection device (1). A hanger (5) and a rack (10) are slidably connected to the stabilizing protection device (1). A damping guide rail (13) is fixed to the inner wall of the component cavity (21). An L-shaped pusher (12) is slidably connected to the damping guide rail (13). The hanger (5) and the rack (10) both extend into the component cavity (21). A limiting piece (6) is fixed to the hanger (5). The limiting piece (6) passes through an elastic element (7) and the inner wall of the component cavity (21). The rack (10) is connected to the inner wall of the component cavity (21) via the second elastic element (11). The extension rod (20) is slidably connected to the second roller assembly (9). The inner wall of the component cavity (21) is slidably connected to the toothed T-shaped limiting element (15). The toothed T-shaped limiting element (15) is connected to the inner wall of the component cavity (21) via the third elastic element (16). The inner wall of the component cavity (21) is rotatably connected to the rotating plate (14) and the transmission bar (17). The transmission bar (17) is slidably connected to the passive ring (19). The passive ring (19) is connected to the transmission bar (17) via the fourth elastic element (18). The rotating plate (14) is rotatably connected to the extension rod (20). The extension rod (20) is slidably connected to the transmission bar (17). The pump body is clamped and fixed by two clamping components (4). Roller assembly one (8) and roller assembly two (9) are both in contact with the inner wall of HDPE well pipe (22) to prevent the pump body from rotating and bumping when it moves down, and to prevent the pump body from shifting due to vibration generated when the pump body starts.

3. The high-flow-rate vertical shaft staged drainage process for deep landfill leachate according to claim 2, characterized in that, The hanger (5) is fixedly connected with a lifting lug.

4. The high-flow-rate vertical shaft staged drainage process for deep landfill leachate according to claim 2, characterized in that, The roller assembly (9) is provided with a locking mechanism 1, and the clamping assembly (4) is provided with a locking mechanism 2.

5. The high-flow-rate vertical shaft staged drainage process for deep landfill leachate according to claim 2, characterized in that, The transmission bar (17) has a channel, and the extension rod (20) is slidably connected to the inner wall of the channel.

6. The high-flow-rate vertical shaft staged drainage process for deep landfill leachate according to claim 2, characterized in that, The clamping assembly (4) is provided with a flexible buffer layer.

7. The high-flow-rate vertical shaft staged drainage process for deep landfill leachate according to claim 2, characterized in that, Both the first roller assembly (8) and the second roller assembly (9) are provided with anti-slip layers.

8. The high-flow-rate vertical shaft staged drainage process for deep landfill leachate according to claim 1, characterized in that, The set of tube holes in one ring includes six tube holes, each with a diameter of 20 mm.

9. A high-flow-rate vertical shaft staged drainage process for deep landfill leachate according to any one of claims 1-8, characterized in that, The pump body is connected to the compressed air control system.

10. A high-flow-rate vertical shaft staged drainage process for deep landfill leachate according to claim 9, characterized in that, The compressed air control system includes an air compressor and an air tank.

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