Landfill leachate collecting, guiding and discharging system

Abstract

The invention discloses a landfill leachate collecting, guiding and discharging system which comprises a landfill. Inclined side slopes are arranged on the two sides of the landfill, and a plurality of flow guide structures are arranged on the side slopes; the flow guide structure comprises a groove and a flow guide pipe, and the groove is formed in the inclined direction of the slope; a groove is formed in the landfill, the two sides of the groove are inclined faces, the flow guide pipe is arranged in the middle of the groove, a liquid collecting groove is formed in the middle of the landfill, a baffle is arranged at the upper end of the liquid collecting groove, and a plurality of liquid inlet holes are formed in the baffle. By arranging the flow guide structure and the liquid collecting tank, leachate can be efficiently discharged from garbage.

Description

Technical Field

[0001] The invention relates to the technical field of garbage disposal, and in particular to a landfill leachate collection and drainage system. Background Art

[0002] Traditional landfills generally use HDPE flower pipes to collect and drain leachate at the bottom of the site. However, this method has the disadvantages of small water collection volume, easy pipe clogging, cumbersome construction, easy scaling in the pipes and difficult cleaning after scaling. In addition, higher garbage layers and uneven settlement of landfill piles may cause the HDPE flower pipes to deform and twist strongly, further reducing the drainage efficiency.

[0003] For landfills in areas with high landfill heights and heavy rainfall, the drainage system layer is required to be able to quickly discharge the leachate from the garbage body. The reasons are: first, the garbage is submerged in water for a long time, and harmful substances seep out, which increases the difficulty of leachate purification; second, waterlogging will increase the load on the lower horizontal liner layer, which can easily cause the horizontal anti-seepage system to be damaged due to overload. Summary of the invention

[0004] The problem to be solved by the present invention is to provide a landfill leachate collection and drainage system, which can efficiently discharge the leachate from the garbage body by arranging a diversion structure and a liquid collecting tank.

[0005] The present invention provides a technical solution to solve the above problems: a landfill leachate collection and drainage system, comprising a landfill; both sides of the landfill are inclined slopes, and the slopes are provided with a plurality of diversion structures;

[0006] The diversion structure includes a groove and a diversion pipe, the groove is arranged along the inclination direction of the slope; the two sides of the groove are inclined surfaces, the diversion pipe is arranged in the middle position of the groove, a liquid collecting trough is arranged in the middle position of the landfill, a baffle is arranged at the upper end of the liquid collecting trough, and a plurality of liquid inlet holes are arranged on the baffle.

[0007] Preferably, a plurality of liquid seepage holes are evenly distributed on the flow guide pipe.

[0008] Preferably, the surface of the landfill is paved with an anti-seepage structure.

[0009] Preferably, the anti-seepage structure includes a HDPE geomembrane, an isolation anti-seepage layer, a geotextile and a sprayed UHPC anti-seepage layer which are arranged in sequence from the inside to the outside.

[0010] Preferably, it further comprises a sedimentation tank and a membrane bioreactor, wherein the sedimentation tank is connected to the liquid collecting tank via a connecting pipe 1, and the sedimentation tank and the membrane bioreactor are connected via a connecting pipe 2.

[0011] Preferably, the membrane bioreactor comprises a reaction tank and a membrane filtration assembly, and the membrane filtration assembly is arranged in the reaction tank for purifying and filtering the leachate in the reaction tank.

[0012] Preferably, a water collection chamber is provided at the upper end of the interior of the reaction tank, and the upper end of the membrane filtration assembly is communicated with the water collection chamber.

[0013] Preferably, the membrane bioreactor further comprises a sludge cleaning component and an aeration component, the sludge cleaning component is transmission-connected to the aeration component, and the sludge cleaning component can clean the surface of the membrane filtration component driven by the aeration component.

[0014] Preferably, the membrane filtration assembly comprises a hollow fiber membrane tube and a connection block, and the connection blocks are arranged at both ends of the hollow fiber membrane tube.

[0015] Preferably, the aeration assembly includes a blower, an air pipe and an aeration plate, one end of the air pipe is connected to the blower, and the other end of the air pipe is connected to the aeration plate located in the reaction tank.

[0016] Compared with the prior art, the present invention has the advantages that the present invention can efficiently discharge the leachate from the garbage body by providing a diversion structure and a liquid collecting tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 is a cross-sectional view of the present invention;

[0020] Figure 3 yes Figure 1 The enlarged schematic diagram of point A in the middle;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the membrane bioreactor of the present invention;

[0022] Figure 5 is a cross-sectional view of a membrane bioreactor of the present invention;

[0023] Figure 6 yes Figure 5 The enlarged schematic diagram of point B in the middle;

[0024] Figure 7 is a top cross-sectional view of the sludge cleaning assembly of the present invention;

[0025] Figure 8is a cross-sectional view of an aeration plate of the present invention;

[0026] Fig. 9 yes Figure 8 Enlarged schematic diagram of point C in the middle.

[0027] The attached drawings are marked with: 1. landfill, 2. matching cavity, 3. sedimentation tank, 4. membrane bioreactor, 5. groove, 6. guide pipe, 7. seepage hole, 8. collecting tank, 9. baffle, 10. liquid inlet hole, 11. HDPE geomembrane, 12. isolation anti-seepage layer, 13. geotextile, 14. sprayed UHPC anti-seepage layer, 15. connecting pipe one, 16. reaction tank, 17. buoyancy ring, 18. pull rod, 19. water collection chamber, 20. connecting block, 21. mounting rod, 22. bristles, 23. hollow fiber membrane tube, 24. aeration plate, 25. air pipe, 26. top plate, 27. connecting rod, 28. accommodating cavity, 29. block, 30. vent, 31. connecting pipe two, 32. blade, 33. mounting column, 34. connector, 35. rotating ring. DETAILED DESCRIPTION

[0028] The following will describe the implementation methods of the present invention in detail with reference to the accompanying drawings and embodiments, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0029] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise specified and limited, the terms "assemble", "connect", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or the two elements can be internally connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0033] It should also be understood that the terms used in this description of the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present invention. As used in the description of the embodiments of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms of "a", "an" and "the" are intended to include plural forms.

[0034] The specific embodiment of the present invention is shown in the accompanying drawings, a landfill 1 leachate collection and drainage system, comprising a landfill 1; both sides of the landfill 1 are inclined slopes, and the slopes are provided with a plurality of diversion structures;

[0035] The diversion structure includes a groove 5 and a diversion pipe 6, and the groove 5 is arranged along the inclination direction of the slope; the two sides of the groove 5 are inclined surfaces, and the diversion pipe 6 is arranged in the middle position of the groove 5. A liquid collecting trough 8 is arranged in the middle position of the landfill 1, and a baffle 9 is arranged at the upper end of the liquid collecting trough 8, and a plurality of liquid inlet holes 10 are arranged on the baffle 9.

[0036] Specifically, the diversion pipe 6 is evenly distributed with a plurality of seepage holes 7. The surface of the landfill 1 is paved with an anti-seepage structure; further, the anti-seepage structure includes a HDPE geomembrane, an isolation anti-seepage layer 12, a geotextile 13 and a sprayed UHPC anti-seepage layer 14 arranged in sequence from the inside to the outside.

[0037] In the above scheme, a diversion structure is set up, which includes a groove and a diversion pipe. The groove 5 is set along the inclination direction of the slope; the two sides of the groove are inclined surfaces, and the leachate in the landfill gathers along the inclined surface of the groove to the middle position of the groove and enters the diversion pipe, and then flows into the collecting tank along the diversion pipe, so that the leachate in the landfill can be collected and drained more efficiently.

[0038] It should be noted that the specific scheme of this embodiment also includes a sedimentation tank 3 and a membrane bioreactor 4. The sedimentation tank 3 is connected to the liquid collecting tank 8 through a connecting pipe 15, and the sedimentation tank 3 and the membrane bioreactor 4 are connected through a connecting pipe 2 31. The leachate is first treated in the sedimentation tank, and the larger impurities in the leachate are precipitated to the bottom of the sedimentation tank, and then the leachate is further treated by the membrane bioreactor.

[0039] In this embodiment, specifically, the membrane bioreactor 4 includes a reaction tank 16 and a membrane filtration assembly, and the membrane filtration assembly is arranged in the reaction tank 16 for purifying and filtering the leachate in the reaction tank 16. Specifically, a water collection chamber 19 is arranged at the upper end of the reaction tank 16, and the upper end of the membrane filtration assembly is connected to the water collection chamber 19. In this embodiment, the membrane bioreactor 4 also includes a sludge cleaning assembly and an aeration assembly, and the sludge cleaning assembly is connected to the aeration assembly in a transmission manner, and the sludge cleaning assembly can clean the surface of the membrane filtration assembly driven by the aeration assembly.

[0040] Specifically, the membrane filtration assembly includes a hollow fiber membrane tube 23 and a connection block 20 , and the connection block 20 is arranged at both ends of the hollow fiber membrane tube 23 .

[0041] Furthermore, the aeration assembly includes a blower, an air pipe 25 and an aeration plate 24 . One end of the air pipe 25 is connected to the blower, and the other end of the air pipe 25 is connected to the aeration plate 24 located in the reaction tank 16 .

[0042] Specifically, a plurality of air vents 30 are provided in the aeration plate 24, the air vents 30 are connected to the air pipe 25, a plurality of accommodating chambers 28 are arranged at intervals in the air vents 30, the sludge cleaning assembly comprises a connector 34, a mounting column 33, a plurality of blades 32, a plurality of mounting rods 21 and two rotating rings 35, the two rotating rings are rotatably mounted on the two connecting blocks 20, the two ends of the mounting rod 21 are respectively connected to the two rotating rings, the mounting rod 21 is provided with bristles 22, the end of the bristles 22 away from the mounting rod 21 is in contact with the outer circumferential surface of the hollow fiber membrane tube 23, the connector 34 is arranged at the lower end of the rotating ring and can rotate with the rotating ring, the mounting column 33 is arranged at the lower end of the connector 34 and extends into the accommodating chamber 28, a plurality of blades 32 are evenly distributed on the mounting column 33, when air is passed into the air vent 30, the air drives the blades 32 to rotate and then drives the entire sludge cleaning assembly to rotate.

[0043] Among them, in order to prevent the sludge cleaning component from scraping the hollow fiber membrane tube 23 during the operation of the membrane bioreactor 4 and reducing the service life of the hollow fiber membrane tube 23, further, this embodiment also includes an on-off control component and a detection component. The on-off control component is used to open and close the air vent 30. Specifically, the on-off control component includes a block 29 and a connecting rod 27. The aeration plate 24 is provided with a movable hole that cooperates with the connecting rod 27 and a matching cavity 2 that cooperates with the block 29. One end of the connecting rod 27 is connected to the block 29, and the other end is connected to the detection component. The matching cavity 2 is arranged on the upper part of the vent 30 and is connected to the vent 30. The detection component includes a buoyancy ring 17, a pull rod 18 and a top plate 26. The buoyancy ring 17 is arranged on the upper part of the reaction tank 16. One end of the pull rod 18 is connected to the buoyancy ring 17, and the other end is connected to the top plate 26. The connecting rod 27 is fixedly connected to the upper end surface of the top plate 26.

[0044] In the above scheme, when the filtering capacity of the hollow fiber membrane tube is good, the block is located in the vent to block the vent, and the sludge cleaning component does not work, which can effectively prevent the sludge cleaning component from constantly cleaning the hollow fiber membrane tube during the operation of the equipment and reducing the service life of the hollow fiber membrane tube. When the filtering capacity of the hollow fiber membrane tube is weakened to the set value, the buoyancy ring drives the pull rod and the top plate to move upward, and then drives the block upward into the matching cavity, the vent is no longer blocked, and the wind with a certain flow rate in the blower is blown into the vent to drive the blades to rotate and then drive the entire sludge cleaning component to rotate.

[0045] Among them, it should be noted that the delivery of the leachate in this scheme is intermittent, that is, the leachate is delivered to the reaction tank once every 30 minutes or so, and the amount of leachate delivered each time is fixed. When the filtration capacity of the hollow fiber membrane tube is better, after the leachate filtered last time is processed, the leachate is delivered to the reaction tank again. The liquid level of the leachate is at the same position as the liquid level of the last leachate. When the filtration capacity of the hollow fiber membrane tube is reduced to the set value, the leachate filtered last time was not completely processed in time. After the leachate is delivered to the reaction tank again, the leachate will be higher than the liquid level of the last leachate, and therefore, the buoyancy ring will be driven to move upward.

[0046] The above description is only for the best embodiment of the present invention, but it should not be understood as limiting the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the scope of protection of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. A landfill leachate collection and drainage system, comprising a landfill (1); characterized in that: Both sides of the landfill (1) are inclined slopes, and the slopes are provided with a plurality of diversion structures; The diversion structure comprises a groove (5) and a diversion pipe (6); the groove (5) is arranged along the inclination direction of the slope; both sides of the groove (5) are inclined surfaces; the diversion pipe (6) is arranged in the middle of the groove (5); a liquid collecting trough (8) is arranged in the middle of the landfill (1); a baffle (9) is arranged at the upper end of the liquid collecting trough (8); and a plurality of liquid inlet holes (10) are arranged on the baffle (9).

2. A landfill leachate collection and drainage system according to claim 1, characterized in that: The flow guide pipe (6) is evenly distributed with a plurality of liquid seepage holes (7).

3. A landfill leachate collection and drainage system according to claim 1, characterized in that: The surface of the landfill (1) is paved with an anti-seepage structure.

4. A landfill leachate collection and drainage system according to claim 3, characterized in that: The anti-seepage structure comprises a HDPE geomembrane (11), an isolation anti-seepage layer (12), a geotextile (13) and a sprayed UHPC anti-seepage layer (14) which are arranged in sequence from the inside to the outside.

5. A landfill leachate collection and drainage system according to claim 1, characterized in that: It also comprises a sedimentation tank (3) and a membrane bioreactor (4); the sedimentation tank (3) is connected to the liquid collecting tank (8) via a connecting pipe (15); the sedimentation tank (3) and the membrane bioreactor (4) are connected via a connecting pipe (31).

6. A landfill leachate collection and drainage system according to claim 5, characterized in that: The membrane bioreactor (4) comprises a reaction tank (16) and a membrane filtration component, wherein the membrane filtration component is arranged in the reaction tank (16) and is used for purifying and filtering the filtrate in the reaction tank (16).

7. A landfill leachate collection and drainage system according to claim 6, characterized in that: A water collection chamber (19) is provided at the upper end of the reaction tank (16), and the upper end of the membrane filtration assembly is in communication with the water collection chamber (19).

8. A landfill leachate collection and drainage system according to claim 7, characterized in that: The membrane bioreactor (4) further comprises a sludge cleaning component and an aeration component. The sludge cleaning component is in driving connection with the aeration component. The sludge cleaning component can clean the surface of the membrane filtration component under the drive of the aeration component.

9. A landfill leachate collection and drainage system according to claim 8, characterized in that: The membrane filtration assembly comprises a hollow fiber membrane tube (23) and a connection block (20), wherein the connection block (20) is arranged at both ends of the hollow fiber membrane tube (23).

10. A landfill leachate collection and drainage system according to claim 9, characterized in that: The aeration assembly comprises a blower, an air pipe (25) and an aeration plate (24); one end of the air pipe (25) is connected to the blower, and the other end is connected to the aeration plate (24) located in the reaction tank (16).

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