Method for steady operation of low concentration firedamp gas switching catalytic reaction

Abstract

The invention relates to an energy utilization and environment protection technique and is a method for stable operation of low concentration gas switched catalytic reaction. The low concentration gas switches a catalytic reactor through flow direction to generate catalytic combustion reaction, methane is consumed and simultaneously heat is generated, the temperature range of stable operation of the catalytic reactor is 200 to 600 DEG C. The invention obtains signals through real-time measurement to the concentration of the inlet of reactor and the temperature of the reactor, and the signals are transmitted to a signal processing and control system which compares the signals and optimization reaction operational parameters, then the signals are transmitted to a high concentration coal gas pipe line inlet control system and high temperature heat interchanger control system. When the temperature is in the range of normal operation, the prior operation is maintained; when the temperature strays from the set value, if the temperature is higher, a high temperature heat interchanger is controlled to strengthen heat exchange so as to reduce the temperature of the reactor, if the concentration or the temperature is lower, a valve of high concentration coal gas in a coal mine is opened to maintain fuel concentration so as to make the reaction smoothly progress.

Description

field of invention [0001] The invention relates to the technical fields of energy utilization and environmental protection, and relates to a method for stable operation of low-concentration gas switching catalytic reactions. Background technique [0002] As an important energy source, coal will produce a large amount of gas (methane) during its mining. Many coal mine gas explosion accidents occur in our country every year, which seriously threaten the safe production of coal mines. In order to improve the safety of coal mine production, a large amount of ventilation is usually used to discharge coal mine gas. Worldwide coal mine methane (CMM) emissions are about 10% of human methane emissions. During the process of coal mining in my country, the amount of methane emitted into the atmosphere reaches 19.4 billion m3 per year. 2 , accounting for about 1 / 3 of the world's total methane emissions from coal mining, 90% of which are discharged into the atmosphere in the form of mi...

AI Technical Summary

Problems solved by technology

However, since the concentration of methane in the low-concentration gas in the actual mine is unstable, it changes within a certain range. Therefore, if the low-concentration gas fed into the reactor is only randomly catalytically combusted, then the reaction temperature It will also fluctuate, and the catalyst works within a certain temperature range. If it exceeds its optimum temperature range, it may not be able to ignite or cause serious problems such as catalyst deactivation and destruction.

[0008] The patent publication No. CN 1718274A provides the preparation method of the catalyst, but does not provide the detailed operation and treatment method for the elimination and utilization of low-concentration gas, and it cannot be directly used in coal mine ventilation

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