Study on Release Mechanism and Control Technology of Hydrogen Sulfide Gas in Coal Mine

Abstract

in the process of high sulfur coal mining, with coal gas outburst, a large amount of highly toxic flammable hydrogen sulfide (H 2 S) gas is produced which threats miner's health and pollutes the environment seriously. it is shown that adding an oxidizing agent in alkaline absorption liquid can obviously increase the removal rate of h 2 S in mine air in the experiment results, and there's no the hydrogen sulfide gas evolution after oscillation of the absorbing tail liquid, the removal efficiency is very remarkable. it is also shown that surfactant can reduce the surface tension of the absorption liquid in the research, accelerate the process of mass transfer between gas-liquid two phases, and improve the absorption efficiency.