Methane oxidation device, mounting method and oxidation method

Abstract

The invention discloses a methane oxidation device, a mounting method and an oxidation method, and belongs to the technical field of greenhouse gas emission reduction of household garbage landfill. The methane oxidation device comprises a shell, wherein the bottom of the shell is connected with a gas guide vertical shaft in a garbage heap body, the shell is divided into a plurality of cavities which are communicated up and down through a plurality of layers of sieve pore plates, and the lowermost cavity is communicated with the gas guide vertical shaft; the lowermost cavity is filled with a gravel packing layer, and the rest cavities are filled with a methane oxidation packing layer. An oxidation method comprises the following steps: dispersing methane collected by the gas guide vertical shaft through a gravel packing layer, and then carrying out oxidation treatment through one or more methane oxidation packing layers; and after the treatment is finished, discharging the treatment gasfrom an upper opening of the shell. According to the invention, the problems of fracture and gas 'short circuit 'caused by differential settlement of a site in the traditional methane oxide layer horizontal plastic paving process are solved, the treatment effect is convenient to detect and evaluate, and the effectiveness, safety and long-term performance of the methane emission reduction effect are ensured.

Description

technical field [0001] The invention relates to the technical field of domestic waste landfill greenhouse gas emission reduction, in particular to a methane oxidation device, an installation method and an oxidation method. Background technique [0002] The disorderly escape of methane in the process of domestic waste landfill is considered to be an important source of greenhouse gas emissions from human activities, and its release runs through the entire operation and later maintenance stages of domestic landfills. Usually, active extraction wells and gas treatment systems need to be installed in the landfill to collect, process or utilize the generated landfill gas (including methane), thereby reducing environmental and safety risks. The collection process of landfill gas mainly depends on the practical experience of the operators. At the same time, due to the large differences in domestic waste in various regions, the actual collection efficiency of landfill gas is general...

AI Technical Summary

Problems solved by technology

[0005] 1. Existing codes generally require the use of HDPE film and clay as the upper covering layer for landfill closure, making it difficult to add methane oxide layer structural units on the basis of existing standards in actual engineering;

[0006] 2. The existing tiling method ignores the efficient collection and drainage of landfill gas by the gas guide shaft in the garbage dump;

[0007] 3. During the stabilization process, the garbage dump will produce uneven settlement, which will lead to the fracture of the horizontally arranged methane oxidation material layer, thereby forming a gas "short circuit" phenomenon, causing the entire oxidation system to collapse;

[0008] 4. The design and practice of the existing methane oxidation technology system lacks the support of the device, which makes it difficult to control and evaluate the actual treatment effect

[0009] All in all, the lack of existing technology and equipment limits the engineering application of methane oxidation technology to a certain extent

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