Tree-like refuse leachate generated in landfill construction and closure as well as landfill gas guide and exhaust system and method

Abstract

The invention discloses a tree-like refuse leachate generated in landfill construction and closure as well as a landfill gas guide and exhaust system and method. The landfill gas guide and exhaust system comprises gabions, gas collecting shafts, horizontal branch gas collecting pipes, water guide blind ditches and a leachate collecting device, wherein the gas collecting shafts are arranged according to the slopes of a backfilling units of a refuse landfill and are enabled to be parallel to the axes of refuse dump backfilling units; one layer of branch gas collecting pipe is paved on every 1-2 backfilling units, and the branch gas collecting pipes communicate with the gas collecting shafts; the water guide blind ditches are arranged in a dump in a layered way, and every two adjacent layers of water guide blind ditches are communicated through the vertically arranged gabions; and the gas collecting shafts communicate with each layer of water guide blind ditch through the gabions. A tree-like guide and exhaust system is established for landfill gas and leachate according to the structure of the refuse landfill, the landfill gas and the leachate are connected and crossed by using pipelines, the arrangement of the water guide blind ditches in the vertical direction is omitted due to the communication of the gas collecting shafts and the water guide blind ditches, so that the collecting efficiencies of the landfill gas and the leachate are increased, meanwhile, the investment cost is reduced, and the landfill gas guide and exhaust system is safe and simple in operation.

Description

technical field [0001] The invention relates to a guide and drainage technology of a garbage landfill site, in particular to a tree-shaped garbage leachate and landfill gas guide and drainage system and a method thereof that can improve collection efficiency. Background technique [0002] At present, most landfills use independent systems to collect leachate and landfill gas, and the investment cost is relatively high. Moreover, landfill gas treatment in landfills generally adopts the method of drilling to build landfill shafts, some of which do not lay gas-collecting branch pipes, and some lay horizontal gas-collecting branch pipes, and use gas extraction facilities to extract gas. The method of not laying gas-collecting branch pipes makes the gas-collecting efficiency relatively low, and the way of laying horizontal gas-collecting branch pipes will make the landfill leachate collected and generated in the horizontal gas-collecting branch pipes unable to be effectively guid...

AI Technical Summary

Problems solved by technology

The way of not laying gas-collecting branch pipes makes the gas-collecting efficiency relatively low, and the way of laying horizontal gas-collecting branch pipes will make the landfill leachate collected and generated in the horizontal gas-collecting branch pipes unable to be effectively guided and discharged, which will affect the air extraction effect

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