Study on Combustion Characteristics of Low Concentration Coalbed Methane Induced by Hydrogen Jet based on Excess Air Ratio

Zonghui Liu; Rundai Yang; Liheng Qin; Zhonghua Qian

doi:10.54691/j59tvh52

Authors

Zonghui Liu
Rundai Yang
Liheng Qin
Zhonghua Qian

DOI:

https://doi.org/10.54691/j59tvh52

Keywords:

Coalbed Methane; Excess Air Ratio; Constant Volume Bomb; Combustion Heat Release Rate.

Abstract

Low concentration coal bed gas used for power generation is a better treatment scheme at present, which solves the problem of environmental pollution caused by the direct emptying of coal bed gas. Coal bed methane is a methyl alkyl fuel, and slow combustion rate will cause abnormal combustion phenomena such as large combustion cycle changes. The initial ambient gas concentration has a great influence on the development and propagation of the flame. In this paper, a constant volume bomb model is established to change the excess air coefficient of methane air premix in the initial constant volume bomb, and the change law of combustion heat release is analyzed. The results show that when hydrogen participates in the combustion stage, the combustion rate increases with the increase of excess air coefficient. When hydrogen is burned out, the combustion rate decreases with the increase of excess air coefficient.

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