A vertical flushing device and method for landfill leachate drainage system

Abstract

The invention discloses a vertical flushing device and method for a landfill leachate drainage system, wherein the vertical flushing device comprises a vertical drainage pipe, a guide pipe and a connecting device; the pipe body of the vertical drainage pipe is provided with an opening; the guide pipe is an "L"-shaped bent pipe, and one end of the guide pipe is coaxially connected to the vertical drainage pipe; the connecting device comprises a clamp clip and a locking structure, wherein the locking structure is used to lock the clamp clip on the pipe body of the leachate drainage pipe, the clamp clip is vertically installed with the bottom end of the vertical drainage pipe and the guide pipe is wrapped in the clamp clip. The vertical flushing device of the invention can quickly and effectively reach the leachate drainage system at a designated position, improve the clogging problem of the leachate drainage, and improve the efficiency of the leachate drainage.

Description

Technical Field

[0001] The invention relates to the technical field of landfill leachate drainage systems, and in particular to a vertical flushing device and method for landfill leachate drainage systems. Background Art

[0002] Landfills are one of the important facilities for solid waste management in my country, and are closely related to residents' lives and urban and rural environments. The landfill leachate drainage system is an important part of the landfill liner system, and is generally composed of a geotextile protective layer, a gravel drainage layer, a drainage blind ditch, and a leachate drainage pipe. In actual projects, it was found that after the landfill had been in operation for several years, the leachate drainage layer system became clogged, and the leachate drainage pipe was the most seriously clogged area. The blockage of the leachate drainage system will directly lead to an increase in the leachate water level in the landfill. Excessive water levels not only increase the leachate leakage rate, but also increase the risk of pile slippage and instability, posing a huge safety hazard.

[0003] In order to ensure the safe and stable operation of the landfill and reduce pollution to the surrounding environment, it is crucial to consider the problem of preventing siltation in the drainage system during the operation of the landfill and how to clean it after siltation. Due to the relatively backward design requirements, the landfills currently under construction in my country usually rarely consider the prevention and control of siltation, resulting in siltation that cannot be cleaned in time and eventually completely blocked. When cleaning siltation, the general idea is to allow the flushing equipment to enter the drainage system at the outlet for backwashing, but due to the structural layout of the drainage system or the blocked channels, it is difficult for the flushing equipment to effectively enter the leachate drainage system. Summary of the invention

[0004] In view of the shortcomings existing in the above-mentioned problems, the present invention provides a vertical flushing device and method for a landfill leachate drainage system. The vertical flushing device can quickly and effectively reach the leachate drainage system at a designated position, improve the blockage problem of the leachate drainage, and enhance the leachate drainage efficiency.

[0005] The invention discloses a vertical flushing device for a landfill leachate drainage system, comprising: a vertical drainage pipe, a guide pipe and a connecting device;

[0006] The body of the vertical drainage pipe is provided with an opening;

[0007] The guide tube is an "L"-shaped bent tube, and one end of the guide tube is coaxially connected to the vertical guide tube;

[0008] The connecting device includes a clamp clip and a locking structure, wherein the locking structure is used to lock the clamp clip on the pipe body of the leachate drainage pipe, the clamp clip is vertically installed on the bottom end of the vertical drainage pipe and the guide pipe is wrapped in the clamp clip.

[0009] As a further improvement of the present invention, when in use, the guide tube passes through the reserved hole of the leachate drainage tube and is placed in the leachate drainage tube, the clamp clip is locked on the tube body of the leachate drainage tube by the locking structure, the clamp clip after locking is coaxially arranged with the leachate drainage tube, and the other end of the guide tube is arranged parallel to the axis of the leachate drainage tube.

[0010] As a further improvement of the present invention, the guide pipe includes a forward flushing conduit in the same direction as the water flow in the leachate drainage pipe and a backwashing conduit in the opposite direction to the water flow in the leachate drainage pipe.

[0011] As a further improvement of the present invention, the vertical drainage pipe and the guide pipe are fixed by hot-melt welding or are an integrated structure.

[0012] As a further improvement of the present invention, the vertical drainage pipe is fixed to the clamp clip by hot-melt welding or is an integrated structure.

[0013] As a further improvement of the present invention, the vertical drainage pipe and the leachate drainage pipe are both HDPE pipes.

[0014] As a further improvement of the present invention, a buffer washer is provided on the inner side of the clamp clip.

[0015] As a further improvement of the present invention, the locking structure comprises a locking bolt, a nut and a gasket;

[0016] The locking bolt passes through the reserved connection hole of the fixing end of the clamp clip and is fixed by the nut and the gasket.

[0017] The present invention also discloses a flushing method based on a vertical flushing device, comprising:

[0018] Establish one or more vertical wells to the body of the leachate drainage pipe;

[0019] A hole is provided at the pipe body of the leachate drainage pipe for the guide pipe to pass through;

[0020] Extending the guide pipe into the leachate drainage pipe through the opening at the upper end of the leachate drainage pipe, and fixing the vertical drainage pipe and the leachate drainage pipe by the connecting device;

[0021] After the vertical flushing device is installed, a steel bar mesh is installed on the wall of the vertical well, and gravel is densely filled between the vertical well and the vertical drainage pipe;

[0022] A high-pressure spray gun is extended from the vertical drainage pipe into the leachate drainage pipe, and the guide pipe is used to perform forward and reverse flushing to clean the clogging in the leachate drainage pipe.

[0023] As a further improvement of the present invention, a rain shielding device is provided at the top end of the vertical drainage pipe, and the rain shielding device is opened when in use.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The vertical flushing device of the present invention enters the drainage system vertically from the pile body, solving the problem that it is difficult for general flushing equipment to effectively enter the channel of the leachate drainage system;

[0026] 2. The connection device of the present invention can solve the problem of underwater pipeline connection and meet the requirements of general leachate drainage pipeline connection;

[0027] 3. The vertical flushing device of the present invention can realize the function of precise positioning. The arrangement form, quantity and position of the vertical flushing device can be arranged according to the coordinate position of the leachate pipeline. It can be used in the entire landfill area or in a local transformation, and has a wide and flexible application range.

[0028] 4. The vertical flushing device of the present invention has openings on the vertical drainage pipe, so that it can also take into account the vertical drainage function and increase the drainage capacity of the leachate;

[0029] 5. The vertical flushing device and flushing method of the present invention make the flushing operation that completely relies on the entry of the leachate collection pipe end convenient and selectively operable, allowing the flushing device to quickly and effectively reach the leachate drainage system at a designated location, improve the blockage problem of the leachate drainage, and reduce the leachate water level in the garbage pile, thereby improving the landfill's ability to resist risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic cross-sectional structure diagram of a vertical flushing device disclosed in an embodiment of the present invention; Figure 2 A schematic diagram of a positive flushing structure of a vertical flushing device disclosed in an embodiment of the present invention;

[0031] Figure 3 A schematic diagram of a backwashing structure of a vertical flushing device disclosed in an embodiment of the present invention;

[0032] Figure 4 The present invention is a schematic diagram of the positive flushing operation of a vertical flushing device disclosed in an embodiment of the present invention.

[0033] In the figure:

[0034] 1. Vertical drainage pipe; 2. Guide pipe; 3. Connecting device; 4. Opening; 5. Clamp clip; 6. Buffer washer; 7. Locking structure; 8. Locking bolt; 9. Nut; 10. Gasket; 11. Leachate drainage pipe; 12. Forward flushing conduit; 13. Backwashing conduit; 14. High-pressure spray gun; 15. Leachate drainage layer; 16. Steel braided mesh; 17. Pebble filling layer. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0037] like Figure 1-3 As shown, the present invention provides a vertical flushing device for a landfill leachate drainage system, comprising: a vertical drainage pipe 1, a guide pipe 2 and a connecting device 3; wherein:

[0038] The vertical drainage pipe 1 of the present invention has an opening 4 on its body. By providing the opening on the vertical drainage pipe, the vertical drainage pipe can also take into account the vertical drainage function, thereby increasing the drainage capacity of the leachate.

[0039] The guide pipe 2 of the present invention is an "L"-shaped bent pipe, and one end of the guide pipe 2 (the first circular tube portion of the bent pipe) is coaxially connected to the vertical drainage pipe 1; wherein the vertical drainage pipe 1 and the guide pipe 2 are fixed by hot-melt welding or are an integrated structure, and the guide pipe 2 includes a positive flushing conduit 12 that is consistent with the water flow direction in the leachate drainage pipe 11 and a backwashing conduit 13 that is opposite to the water flow direction in the leachate drainage pipe 11.

[0040] The connecting device 3 of the present invention includes a clamp clip 5 and a locking structure 7. The locking structure 7 is used to lock the clamp clip 5 on the pipe body of the leachate drainage pipe 11. The clamp clip 5 is vertically installed on the bottom end of the vertical drainage pipe 1 and the guide pipe 2 is wrapped in the clamp clip 5; wherein the other end of the guide pipe 2 (the second circular tube portion of the bent pipe) is placed in the clamp clip 5, and the other end of the guide pipe 2 is arranged parallel to the axis of the clamp clip 5; the vertical drainage pipe 1 and the clamp clip 5 are fixed by hot-melt welding or are an integrated structure.

[0041] When the vertical flushing device of the present invention is used, the guide pipe 2 passes through the reserved hole of the leachate drainage pipe 11 and is placed in the leachate drainage pipe 11. The clamp clip 5 is locked on the pipe body of the leachate drainage pipe 11 through the locking structure 7. The locked clamp clip 5 is coaxially arranged with the leachate drainage pipe 11, and the other end of the guide pipe 2 is arranged parallel to the axis of the leachate drainage pipe 11.

[0042] Furthermore, the vertical drainage pipe 1 and the leachate drainage pipe 11 of the present invention are both HDPE pipes.

[0043] Furthermore, a buffer washer 6 is provided on the inner side of the clamp clip 5 of the present invention.

[0044] Furthermore, the locking structure 7 of the present invention includes a locking bolt 8, a nut 9 and a gasket 10. Figure 1 As shown, the locking bolt 8 passes through the reserved connection hole at the fixed end of the clamp clip 5, and is fixed and disassembled and adjusted by the nut 9 and the gasket 10; the locking bolt 8, the nut 9, and the gasket 10 are made of corrosion-resistant plastic material, and when the locking structure 7 is made of other materials, it needs to be wrapped with polyethylene material or subjected to corrosion-resistant treatment.

[0045] like Figure 4 As shown, the present invention also provides a flushing method based on a vertical flushing device, comprising:

[0046] One or more vertical wells are established to the pipe body of the leachate drainage pipe 11; an opening for the guide pipe 2 to pass through is opened at the pipe body of the leachate drainage pipe 11; the guide pipe 2 is extended into the leachate drainage pipe 11 through the opening at the upper end of the leachate drainage pipe 11, and the vertical drainage pipe 1 and the leachate drainage pipe 11 are fixed by the connecting device 3; after the vertical flushing device is installed, a steel mesh 16 is installed on the wall of the vertical well, and gravel is densely filled between the vertical well and the vertical drainage pipe 1 to form a gravel filling layer 17; a high-pressure spray gun 14 is extended from the vertical drainage pipe 1 into the leachate drainage pipe 11, and the guide pipe 2 is used for forward and reverse flushing to clear the blockage in the leachate drainage pipe 11.

[0047] Specifically include:

[0048] Step 1: Position the vertical well according to the design layout, and combine the coordinate position of the leachate pipeline 11 to complete the vertical well and take measures to stabilize the well wall.

[0049] Step 2: After the well is completed, clean the bottom leachate drainage layer 15 at the connection between the vertical well and the leachate drainage pipe 11, and open an opening slightly larger than the outer diameter of the vertical drainage pipe 1 at the upper end of the leachate drainage pipe 11; install the vertical flushing device in the vertical well, keep the vertical flushing device located in the center of the vertical well, extend the guide pipe 2 into the leachate drainage pipe 11 through the opening at the upper end of the leachate drainage pipe 11, and tightly fix the vertical drainage pipe 1 to the bottom leachate drainage pipe 11 through the connecting device 3.

[0050] Step 3: After the vertical flushing device is installed, a steel mesh is installed on the wall of the vertical well, and the well is densely filled with pebbles and gravels. After the entire device is set up, a device to prevent rainwater from entering is set at the top of the vertical drainage pipe 1.

[0051] Step 4: When flushing, open the rainwater prevention device at the top of the vertical drainage pipe, put the high-pressure spray gun 14 from the vertical drainage pipe 1 into the leachate drainage pipe 11, and use the guide pipe 2 to adjust the direction, angle and position of forward and reverse flushing. The nozzle of the high-pressure spray gun 14 sprays high-pressure water into the leachate drainage pipe 11 to clear the blockage. After flushing, remove the high-pressure spray gun 14 and close the rainwater prevention device at the top of the vertical drainage pipe. Formulate a reasonable vertical flushing arrangement and a regular flushing plan, and regularly clear the blockage of the drainage system to ensure the normal operation of the leachate drainage system and extend the effective service life of the leachate drainage system.

[0052] The advantages of the present invention are:

[0053] 1. For completed landfills, due to the structural layout of the drainage system or the blocked passage, it is difficult for general flushing equipment to effectively enter the drainage system of leachate. Therefore, the vertical flushing device of the present invention enters the drainage system vertically from the landfill body, solving the problem that it is difficult for general flushing equipment to effectively enter the channel of the leachate drainage system.

[0054] 2. Some leachate usually accumulates at the bottom of the operating landfill, and the connection of underwater plastic pipes can no longer be made by the original hot-melt welding. Therefore, the connection device of the present invention can solve the problem of underwater pipe connection and meet the requirements of general leachate drainage pipe connection.

[0055] 3. The vertical flushing device of the present invention can realize the function of precise positioning. The arrangement form, quantity and position of the vertical flushing device can be arranged according to the coordinate position of the leachate pipeline. It can be used in the entire landfill area or in a local transformation, and has a wide and flexible application range.

[0056] 4. The vertical flushing device of the present invention has openings on the vertical drainage pipe, so that it can also take into account the vertical drainage function and increase the drainage capacity of the leachate;

[0057] 5. The vertical flushing device and flushing method of the present invention make the flushing operation that completely relies on the entry of the leachate collection pipe end convenient and selectively operable, allowing the flushing device to quickly and effectively reach the leachate drainage system at a designated location, improve the blockage problem of the leachate drainage, and reduce the leachate water level in the garbage pile, thereby improving the landfill's ability to resist risks.

[0058] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vertical flushing device for a landfill leachate drainage system, characterized in that: include: Vertical drainage pipes, guide tubes and connecting devices; The body of the vertical drainage pipe is provided with an opening; The guide tube is an "L"-shaped bent tube, and one end of the guide tube is coaxially connected to the vertical guide tube; The connecting device comprises a clamping piece and a locking structure, wherein the locking structure is used to lock the clamping piece on the pipe body of the leachate drainage pipe, the clamping piece is vertically installed with the bottom end of the vertical drainage pipe and the guide pipe is wrapped in the clamping piece; When in use, the guide pipe is placed in the leachate drainage pipe through the reserved hole of the leachate drainage pipe, the clamp clip is locked on the pipe body of the leachate drainage pipe through the locking structure, the clamp clip is coaxially arranged with the leachate drainage pipe after locking, and the other end of the guide pipe is arranged parallel to the axis of the leachate drainage pipe; The vertical guide pipe is fixed to the guide pipe by hot-melt welding or is an integrated structure, and the vertical guide pipe is fixed to the clamp clip by hot-melt welding or is an integrated structure.

2. The vertical flushing device according to claim 1, characterized in that: The guide pipe comprises a forward flushing conduit which is consistent with the water flow direction in the leachate drainage pipe and a backwashing conduit which is opposite to the water flow direction in the leachate drainage pipe.

3. The vertical flushing device according to claim 1, characterized in that: The vertical drainage pipe and the leachate drainage pipe are both HDPE pipes.

4. The vertical flushing device according to claim 1, characterized in that: A buffer washer is arranged on the inner side of the clamp clip.

5. The vertical flushing device according to claim 1, characterized in that: The locking structure includes a locking bolt, a nut and a gasket; The locking bolt passes through the reserved connection hole of the fixing end of the clamp clip and is fixed by the nut and the gasket.

6. A flushing method based on the vertical flushing device according to any one of claims 1 to 5, characterized in that: include: Establish one or more vertical wells to the body of the leachate drainage pipe; A hole is provided at the pipe body of the leachate drainage pipe for the guide pipe to pass through; Extending the guide pipe into the leachate drainage pipe through the opening at the upper end of the leachate drainage pipe, and fixing the vertical drainage pipe and the leachate drainage pipe by the connecting device; After the vertical flushing device is installed, a steel bar mesh is installed on the wall of the vertical well, and gravel is densely filled between the vertical well and the vertical drainage pipe; A high-pressure spray gun is extended from the vertical drainage pipe into the leachate drainage pipe, and the guide pipe is used to perform forward and reverse flushing to clean the clogging in the leachate drainage pipe.

7. The flushing method according to claim 6, characterized in that: A rain shielding device is arranged at the top end of the vertical drainage pipe, and the rain shielding device is opened when in use.

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