Method and device for destroying low-concentration gas methane in coal mines

Abstract

A method and device for destroying low-concentration gas methane in coal mines. The method includes a device for destroying low-concentration gas methane in coal mines. Gas methane is input into the oxidation bed, and the methane will quickly react with oxygen and release heat; (C) store the heat and continue the reaction; (D) clean exhaust gas after the reaction is discharged from the oxidation bed; (E) switch direction, and then The low-concentration gas methane in the coal mine is input into the oxidation bed for oxidation reaction and release of heat; (F) store and output excess reaction heat, and repeat steps (B) (C) (D) (E) (F). The device includes a switching valve mechanism, an oxidation bed, a recovery valve mechanism, an air intake system and a detection and control system. The switching valve mechanism and the oxidation bed are installed together, and are integrated with the recovery mechanism and the air intake system. The invention has the characteristics of energy saving, environmental protection, high efficiency, safety, fast response and thoroughness, and is mainly applied in coal mine low-concentration gas methane destruction process engineering or similar engineering.

Description

1. Technical field [0001] The invention relates to methane destruction technology and equipment in coal mine gas with low-concentration methane content, in particular to a method and device for destroying methane in coal mine low-concentration gas. 2. Background technology [0002] At present, in coal mining activities, there is no suitable technical and economic means to destroy and utilize this part of the gas, which is called "puffy wind" and contains less than 1.5% methane, and basically all of it is discharged into the atmosphere. The basic principle of the research and demonstration treatment and utilization of coal mine gas extraction (exhaust air) is based on the "counter-current thermal oxidation reaction" technology, but due to the low content of methane, the relative consumption of additional energy in the destruction process is relatively large, and due to The molecular weight difference between methane and oxygen and nitrogen in the air is quite large, and rapid...

AI Technical Summary

Problems solved by technology

Due to the poor air permeability of coal seams in some coal mines, although the methane content of the pumped gas is low, below 6% by volume, there is currently no suitable technical and economic means to destroy and utilize this part of the gas, and basically all of it is discharged into the atmosphere

Some coal mine gas contains more nitrogen and carbon dioxide. Although the volume content of methane is higher than 6%, it still cannot be processed and utilized.

In this way, on the one hand, these available resources are wasted, and on the other hand, the environment is polluted to a certain extent, which is actually a loss

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