Biogas and leachate integrated pumping and drainage system for garbage landfill

A landfill and biogas technology, which is applied to waterway systems, sewage discharge, drainage structures, etc., can solve the problems of poor permeability of waste bodies, unsatisfactory biogas and leachate pumping effects, etc., and achieve post-maintenance Convenient management, convenient adjustment and processing, and convenient construction

Inactive Publication Date: 2007-07-11
CHINA UNIV OF MINING & TECH
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AI Technical Summary

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

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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 pumping system of the present invention is a combination of a liquid collection well and a gas recovery well. As shown in Figure 2, it involves a shaft 1, a multi-branch collection and drainage channel 2, an air suction pump 5, a submersible sewage pump 6, an air suction pipe 7, and a drainage system. Tube 8, sealing cap 9. The construction of the 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 landfilled....

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Abstract

The invention relates to an integrated drainage system for landfill biogas and leachate. Before the landfill is used, the shaft well is finished. Multi-level and multi-branch collection and drainage passages connected with the shaft well are put from bottom to top in turn as rubbish landfill operation carries. Gravels with air and water guide are filled in collection and drainage passages and the angle alpha between multi-branch collection and drainage passage and the level of shaft well enlarges gradually from bottom to top. There is no sealing cover for shaft well and drainage device, which can drain biogas and leachate, is set in it. By multi-level multi-branch collection and drainage passage, which are put with layered radial pattern and with certain angle of the level, air and water permeability in rubbish is improved so that gas-liquid integrated collection and conduction are carried. As multi-level multi-branch collection and drainage passages with diverging pattern gather to the center of shaft well, accumulation of biogas and leachate is realized so as to be convenience for drainage. The whole system is provided with simple structure, high collection efficiency for biogas and leachate, convenience construction, low project cost, convenience later maintenance and management.

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 Applications(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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