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Biogas and leachate integrated pumping and drainage system for garbage landfill

A landfill and biogas technology, applied in waterway systems, sewage removal, drainage structures, etc., can solve problems such as unsatisfactory biogas and leachate pumping and drainage effects, and poor permeability of garbage bodies, and achieve later maintenance. The effect of convenient management, convenient adjustment and processing, and convenient construction

Inactive Publication Date: 2009-08-12
CHINA UNIV OF MINING & TECH
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

This independent pumping method requires separate engineering construction, and as the waste degrades, the particles in the leachate block the migration channels of gas and liquid, and the permeability of the waste body deteriorates, resulting in the extraction of biogas and leachate. The row effect becomes less than ideal

Method used

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  • Biogas and leachate integrated pumping and drainage system for garbage landfill
  • Biogas and leachate integrated pumping and drainage system for garbage landfill

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with the embodiment in the accompanying drawings:

[0011] The extraction system of the present invention is a combination of a liquid collection well and a gas recovery well, figure 2 As shown, a shaft 1, a multi-branch collection and drainage channel 2, an air suction pump 5, a submersible sewage pump 6, an air extraction pipe 7, a drain pipe 8, and a sealing cover 9 are involved. The construction of the vertical shaft 1 is completed before the landfill is put into use, and the height l of the wellhead above the closure of the landfill is 300-500mm; the height h between the bottom of the well and the bottom of the drainage layer 4 is 3000-5000mm. The shaft wall is constructed of reinforced concrete material with strong deformation resistance, and multiple horizontal holes are reserved in the shaft wall to communicate with the multi-branch collection and drainage channel 2 when the garbage 12 is land...

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Abstract

An integrated drainage system for biogas and leachate in a landfill site. Before the landfill site is put into use, the shaft is built, and the multi-level and multi-branch shafts connected with the shaft are laid sequentially from bottom to top along with the landfill operation. The collection and drainage channel is filled with water-conducting and air-conducting gravel, and the angle α between the multi-branch collecting and drainage channel and the vertical shaft gradually increases from bottom to top; Extraction device for extracting biogas and leachate. The multi-level and multi-branch collection and drainage channels at a certain angle to the horizontal plane laid radially in layers can improve the water permeability and air permeability inside the garbage body, and carry out the integrated collection and transportation of gas and liquid; through the divergent multi-level, multi- The branch collection and drainage channels converge to the central shaft to realize the accumulation of biogas and leachate, which is convenient for pumping and drainage. The structure of the whole system is simple, the collection efficiency of biogas and leachate is high, the construction is convenient, the engineering cost is low, and the later maintenance and management are convenient.

Description

technical field [0001] The invention relates to a garbage landfill system, in particular to a garbage landfill multi-branch biogas and leachate integrated pumping and drainage system. Background technique [0002] At present, biogas and leachate in landfills are pumped independently: biogas is pumped through pre-buried drainage pipes or vertical holes are drilled after the site is closed, and leachate is pumped from the bottom of the landfill. After the blind ditch is collected, it enters the liquid collection well and is pumped out. This independent pumping method requires separate engineering construction, and as the waste degrades, the particles in the leachate block the migration channels of gas and liquid, and the permeability of the waste body deteriorates, resulting in the extraction of biogas and leachate. The discharge effect becomes less than ideal. Contents of the invention [0003] The purpose of the present invention is to overcome the existing problems in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E03F1/00E03F5/00
Inventor 桑树勋周效志曹丽文程云环张时音刘会虎
Owner CHINA UNIV OF MINING & TECH
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