Coal mine low concentration mash gas methane destroying method and apparatus

Abstract

The invention relates to a coal mine low concentration gas methane destroying method and a device thereof. The method comprises the following steps automatically carried out by the coal mine low concentration gas methane destroying device: (A) electrifying an oxidizing bed, and starting and heating the oxidizing bed to be at least 800 DEG C; (B) inputting coal mine low concentration gas methane into the oxidizing bed, carrying out the rapid reaction of methane and oxygen, and releasing heat; (C) storing the heat, and maintaining and continuing the reaction; (D) discharging clean waste gas out of the oxidizing bed after the reaction; (E) switching the direction, and inputting the coal mine low concentration gas methane into the oxidizing bed again so as to carry out an oxidization reaction and release heat; and (F) storing and outputting redundant reaction heat, and repeating the steps (B)(C)(D)(E)(F). The device comprises a switch valve mechanism, the oxidizing bed, a recovery valve mechanism, a gas inlet system and a process detection and control system. The switch valve mechanism and the oxidizing bed are assembled together and are integrated with the recovery mechanism and the gas inlet system into a whole. The method and the device are characterized by energy conservation, environmental protection, high efficiency, safety, and rapid and thorough reaction, and mainly applied to the coal mine low concentration gas methane destroying process project or similar projects.

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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