Coal mine methane gas oxidation device

Abstract

The invention relates to a coal mine methane gas oxidation device, comprising an outer shell and a honeycomb ceramic oxidation bed, wherein a heat insulation layer is distributed on the inner wall of the outer shell; the upper and lower ends of the honeycomb ceramic oxidation bed are respectively provided with upper and lower rectifying chambers; the side parts of the upper and lower rectifying chambers are provided with ports which are respectively communicated with an intake pipe and an exhaust pipe; the intake pipe and the exhaust pipe are respectively provided with an intake reversing valve, an exhaust reversing valve, an intake pipe temperature sensor, an exhaust pipe temperature sensor, an intake pipe gas concentration sensor and an exhaust pipe gas concentration sensor; the upper and lower parts of the honeycomb ceramic oxidation bed are respectively provided with upper and lower flow homogenizers; the middle part of the honeycomb ceramic oxidation bed is provided with a starting electric heater; the upper and lower parts of the starting electric heater are provided with built-in heat exchangers at intervals; and the back of the shell is provided with an upper rectifying chamber temperature sensor in the middle of the upper rectifying chamber, a temperature sensor at the middle of the honeycomb ceramic oxidation bed and a lower rectifying chamber temperature sensor at the middle of the lower rectifying chamber which are inserted at intervals. The invention has the advantages of compact structure, convenient operation, small occupied area and low investment and operation cost.

Description

technical field [0001] The invention relates to an oxidation device for exhaust gas in coal mines, in particular to a mining equipment for oxidizing and utilizing exhaust gas in coal mines based on the principle of heat storage, and belongs to the fields of coal mine energy saving and emission reduction, coal mine safety technology and engineering. Background technique [0002] In my country's conventional energy composition, the total amount of coal resources is about 5.57 trillion tons, and the amount of gas (coal bed methane) resources within 2000m underground is about 30-35 trillion m 3 , is a country with poor per capita resources, and the effective mining and utilization of coal and gas resources has become increasingly prominent in the development of our national economy. Gas is a non-renewable resource associated with coal. At the same time, gas is also a clean and efficient energy source, and its calorific value can reach 33.5-36.8MJ / m 3 , 1m 3 Gas is equivalent t...

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Problems solved by technology

[0004] At present, only a small number of units are conducting research on the oxidation utilization technology of coal mine exhaust gas. The patent documents disclosed "coal mine exhaust gas methane oxidation device" (200620081956.X), "mine mine exhaust gas thermal oxidation device" (200810249860.3), " Mine exhaust air oxidation device" (200820224339.X) and other technologies all use integral heat exchange devices, but due to the large-capacity integral heat exchangers, the temperature drop of the airflow and oxidation bed at the rear of the heat exchanger is too large, and it is easy to Causes unstable operation of the oxidation bed

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