CN215211470U

CN215211470U - Pumping and draining well for leachate of refuse landfill

Info

Publication number: CN215211470U
Application number: CN202120288151.7U
Authority: CN
Inventors: 马根朝; 耿震; 胡邦; 佘步存
Original assignee: Wuxi Municipal Design Institute Co Ltd
Current assignee: Huaxin Design Group Co ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-12-17
Anticipated expiration: 2031-01-29

Abstract

The utility model discloses a landfill leachate uses pump drainage well belongs to landfill environment renovation field. The pump drainage well for landfill leachate is equipped with clay layer, rubbish layer, drainage rubble french drain and reservoir bottom barrier from top to bottom in proper order, be equipped with longitudinal arrangement's pump drainage well in clay layer, rubbish layer and the drainage rubble french drain, the pump drainage well includes solid wall pipe and trompil pipe, be equipped with the stealthily dirty pump in the pump drainage well, the stealthily dirty pump has the valve well through pump drainage pipe intercommunication. The garbage leachate collecting device has high garbage leachate collecting efficiency, can effectively discharge leachate collected in the pumping and drainage well, and is simple, practical and convenient to operate; the valve well that sets up can effectively control leachate outflow, realizes the detection to liquid simultaneously, and telescopic joint and check valve in the valve well can effectively prevent the rubbish leachate reflux of extraction.

Description

Pumping and draining well for leachate of refuse landfill

Technical Field

The utility model relates to a landfill leachate uses pump drainage well belongs to landfill environment renovation field.

Background

The refuse landfill is an important component in the treatment of urban refuse and plays a significant role in environmental protection. Generally, at the initial stage of construction of a refuse landfill, a gravel guide and drainage blind ditch and a perforated pipe are arranged at the bottom of a reservoir area, so that leachate generated in a refuse dump is guided and drained. At present, large-scale domestic refuse landfill sites have construction time of decades, and due to the fact that the initial construction standard is low and the refuse inevitably has non-standard parts in the landfill process, leachate and gravel drainage blind ditches and perforated pipes are blocked occasionally. This part drainage guide system is in case blockked up and generally hardly maintains, leads to the inside leachate water level of rubbish heap body constantly to rise, and upper portion leachate can only be collected to the shallow layer rubble french drain all around of reservoir area, only guarantees that leachate is not excessive, and the inside leachate of reservoir area can not effectively be discharged, has the risk of polluting groundwater and soil, seriously influences landfill steady operation and seal maintenance, consequently an urgent need a pump drainage well with the inside leachate pump drainage in reservoir area.

SUMMERY OF THE UTILITY MODEL

[ problem ] to

The utility model discloses the problem that solves is: the leachate in the reservoir area of the existing refuse landfill cannot be discharged, so that the risk of polluting underground water and soil exists.

[ solution ]

The utility model provides a pump drainage well for landfill leachate is applicable to the pump drainage of landfill leachate, and this pump drainage well can come on the inside leachate pump drainage of landfill reservoir area and simple and practical, convenient operation.

The pump drainage well for landfill leachate is equipped with clay layer, rubbish layer, drainage rubble french drain and reservoir bottom barrier from top to bottom in proper order, be equipped with longitudinal arrangement's pump drainage well in clay layer, rubbish layer and the drainage rubble french drain, the pump drainage well includes solid wall pipe and trompil pipe, be equipped with the stealthily dirty pump in the pump drainage well, the stealthily dirty pump has the valve well through pump drainage pipe intercommunication.

The utility model discloses an in an embodiment, the pump drainage well is hollow pipe and divide into two sections from top to bottom, the upper segment of pump drainage well is solid wall pipe, the hypomere of pump drainage well is the trompil pipe.

In an embodiment of the present invention, the outer periphery of the solid-wall pipe wall is a clay layer.

In an embodiment of the present invention, the clay layer and the garbage layer are separated by geotextile.

The utility model discloses an in an embodiment, the round hole has been seted up on the trompil pipe, the periphery of trompil pipe wall is equipped with the metalling.

The utility model discloses an in an embodiment, the periphery on metalling is equipped with steel reinforcement cage, steel reinforcement cage's periphery is the rubbish layer.

The utility model discloses an in the embodiment, solid wall pipe and trompil pipe material are the real wall pipe of PE, and the pipe diameter is not less than 600 mm.

The utility model discloses an in the embodiment the upper end of pump drainage well is equipped with the walling crib support, is equipped with the well lid on the walling crib support, the well lid is the flip formula.

The utility model discloses an in an embodiment, the inside buttress that is equipped with of pump drainage well, the buttress is established on the drainage and guide rubble french drain, and the top of buttress does the stealthy dirty pump.

The utility model discloses an in an embodiment, the valve well includes telescopic joint, check valve, gate valve, sample connection and sump pit.

[ advantageous effects ]

1. The utility model discloses not only set up the drainage and guide rubble french drain in order to collect rubbish layer bottom leachate in rubbish layer bottom, still set up trompil pipe and metalling around the pump drainage well in order to collect the leachate on rubbish layer upper portion, can improve the collection efficiency of pump drainage well to rubbish leachate greatly.

2. The utility model discloses a stealthily dirty pump intercommunication row of taking out pipe can discharge the leachate of collecting in the pump drainage well effectively, simple and practical, convenient operation.

3. The utility model discloses valve and sample connection in the valve well can the effective control leachate outflow, realize the detection to liquid simultaneously, and telescopic joint and the check valve in the valve well can effectively prevent the rubbish leachate reflux that draws.

4. The utility model discloses be equipped with the steel reinforcement cage outside the pump drainage well, can guarantee the stable in structure of whole pump drainage well, can prevent again that the intraformational debris of rubbish from blockking up the pump drainage well influence the collection to the leachate.

Drawings

Fig. 1 is a schematic longitudinal section view of the pumping drainage well of the present invention installed on a refuse landfill.

Fig. 2 is a schematic top view of the present invention.

Fig. 3 is a schematic view of a partial longitudinal section of the pumping well of the present invention.

In the figure, 1, a pumping drainage well; 2. guiding and discharging the crushed stone blind ditch; 3. a submersible sewage pump; 4. a tube drawing and discharging tube; 5. an expansion joint; 6. a check valve; 7. a gate valve; 8. a sampling port; 9. a valve well; 10. a sump; 11. a well cover; 12. a walling crib support; 13. a solid wall pipe; 14. perforating a pipe; 15. a reinforcement cage; 16. a clay layer; 17. a crushed stone layer; 18. geotextile; 19. buttress; 20. a waste layer; 21. a reservoir bottom barrier layer.

Detailed Description

To achieve the above objects, features and advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, the present invention will be described in detail with reference to the accompanying drawings.

Example 1

The pumping drainage well for leachate of the refuse landfill is sequentially provided with a clay layer 16, a refuse layer 20, a drainage and macadam blind ditch 2 and a reservoir bottom impermeable layer 21 from top to bottom as shown in figure 1. The drainage well 1 is longitudinally arranged in the clay layer 16, the garbage layer 20 and the guide and discharge broken stone blind ditch 2, the compactness of the clay layer 16 is not less than 93%, and geotextile is adopted between the clay layer 16 and the garbage layer 2018 are separated, and the geotextile 18 is not less than 400g/m². The pumping drainage well 1 is a hollow circular pipe and is divided into an upper section and a lower section, the upper section of the pumping drainage well 1 is a solid-wall pipe 13, and the periphery of the pipe wall of the solid-wall pipe 13 is a clay layer 16; the lower section of the pumping well 1 is an open hole pipe 14. As shown in fig. 3, a plurality of circular holes are formed in the perforated pipe 14, the size and the distance of the circular holes are set on the premise that the structural strength of the pumping and drainage well 1 and the draining and draining of leachate are satisfied, the aperture of the circular hole in the perforated pipe 14 is not less than 20mm, and the center distance between the circular holes is 100 mm. The periphery of 14 pipe walls of trompil pipe is equipped with metalling 17, metalling 17's periphery is equipped with steel reinforcement cage 15, and steel reinforcement cage 15's cage eye size is not more than 1600mm²And the blockage of the reinforcement cage 15 and the perforated pipe 14 caused by the sundries in the garbage layer is prevented. The periphery of the steel reinforcement cage 15 is a garbage layer 20, and the thickness of the gravel layer 17 is 50-100 mm. The solid-wall pipe 13 and the perforated pipe 14 are made of PE solid-wall pipes, the pipe diameter is not less than 600mm, SDR (ratio of pipe outer diameter to pipe wall thickness) is not less than 17, and the requirement of structural stability inside the pump drainage well 1 can be met.

The upper end of the pumping drainage well is provided with a well ring support 12, the well ring support 12 is provided with a well cover 11, the well cover 11 is a flip cover type, so that the operation safety of the pumping drainage well 1 can be maintained, a closed space can be formed in the pumping drainage well 1, and the odor of garbage leachate is prevented from being discharged. The drainage well is characterized in that a buttress 19 is arranged inside the drainage well 1, the buttress 19 is arranged on the guide and drainage gravel blind ditch 2, a submersible sewage pump 3 is arranged on the top surface of the buttress 19, and the submersible sewage pump 3 is communicated with the valve well 9 through a drainage pipe 4.

As shown in fig. 2, the valve well 9 comprises an expansion joint 5, a check valve 6, a gate valve 7, a sampling port 8 and a water collecting pit 10, and the valve well 9 is communicated to a rear-end regulating reservoir through a pipeline. When garbage leachate enters the valve well 9 from the pumping and draining pipe 4, the expansion joint 5 extends and presses the check valve 6, and the check valve 6 is compressed, so that the leachate can be effectively prevented from flowing back. The gate valve 7 close to the sampling port 8 is opened, so that leachate can flow to the sampling port 8, a worker can sample at any time, the garbage leachate can be monitored, and meanwhile, the flow of the leachate can be regulated.

The utility model discloses a working process: a part of leachate in the garbage pile flows into the pumping well 1 through the drainage and guide macadam blind ditch 2 at the bottom of the pumping well 1, and the other part of leachate permeates into the pumping well 1 through the gravel layer 17 and the perforated pipe 14. Under normal conditions, stealthily dirty pump 3 is in the closed condition, and along with the rising of the inside leachate water level of rubbish heap, stealthily dirty pump 3 starts, takes out the leachate, is equipped with warning water level and minimum water level in stealthily dirty pump 3, ensures that the inside leachate water level of rubbish heap is in lower level. The extracted leachate is discharged into the valve well 9 through the drainage pipe 4, and the valve well 9 can sample and regulate the flow of the extracted leachate. And opening a gate valve 7 in the valve well 9 to discharge the garbage leachate into a rear-end regulating tank.

The protection scope of the present invention is not limited to the above embodiments, and any modifications, equivalent replacements, and improvements that can be made by a person skilled in the art within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a pump drainage well for landfill leachate, a serial communication port, pump drainage well for landfill leachate top-down is equipped with clay layer (16), rubbish layer (20), drainage rubble french drain (2) and storehouse end barrier (21) in proper order, be equipped with longitudinal arrangement's pump drainage well (1) in clay layer (16), rubbish layer (20) and drainage rubble french drain (2), pump drainage well (1) is including solid wall pipe (13) and trompil pipe (14), be equipped with submersible sewage pump (3) in pump drainage well (1), submersible sewage pump (3) have valve well (9) through pump drainage pipe (4) intercommunication.

2. The landfill leachate pumping well of claim 1, wherein the pumping well (1) is a hollow round pipe and is divided into an upper section and a lower section, the upper section of the pumping well (1) is a solid-wall pipe (13), and the lower section of the pumping well (1) is a perforated pipe (14).

3. The landfill leachate drainage well of claim 2, wherein the solid wall pipe (13) has a clay layer (16) around the outer circumference of the pipe wall.

4. A drainage well for landfill leachate according to claim 3, wherein the clay layer (16) and the landfill layer (20) are separated by geotextile (18).

5. The drainage well for leachate in landfill site of claim 2, wherein the perforated pipe (14) is provided with a circular hole, and the periphery of the pipe wall of the perforated pipe (14) is provided with a gravel layer (17).

6. The drainage well for leachate of refuse landfill as claimed in claim 5, wherein the periphery of the gravel layer (17) is provided with a reinforcement cage (15), and the periphery of the reinforcement cage (15) is a refuse layer (20).

7. The drainage well for leachate in the landfill site as claimed in claim 6, wherein the solid-wall pipe (13) and the open pore pipe (14) are made of PE solid-wall pipe, and the pipe diameter is not less than 600 mm.

8. The pumping well for the leachate of the refuse landfill as claimed in claim 1, wherein the pumping well (1) is provided with a well ring support (12) at the upper end, the well ring support (12) is provided with a well lid (11), and the well lid (11) is of a flip type.

9. The drainage well for leachate of the refuse landfill as claimed in claim 8, characterized in that the drainage well (1) is internally provided with a buttress (19), the buttress (19) is arranged on the drainage and gravel blind ditch (2), and the submersible sewage pump (3) is arranged above the buttress (19).

10. The landfill leachate pumping well of claim 1, wherein the valve well (9) comprises a telescopic joint (5), a check valve (6), a gate valve (7), a sampling port (8) and a sump pit (10).