【作者】

Guochang Zhang,Shanxiang Mu,Kangyao Deng

【摘要】

论文已在中国上海举行的第27届CIMAC大会上发表。论文的版权归CIMAC所有。When volume fraction of mine gas reaches 5%~15%, it will explode in case of fire. Forthe mine gas with concentration under 25%, the traditional approach is to extract the wet mine gas and discharge it to the air, which is a waste of resources, and endangers environmental protection. China has rich gas geological storage. According to estimation of concerning department, the annual emission of mine gas is about 13.5 billion cubic meters during the process of coal mining, more than 90% of which has a methane concentration under 25%. In order to effectively utilize the low concentration gas, Shengli Power Machinery Co. Ltd. developed 12V190 gas engine, which can use mine gas with methane concentrations in the range of 6%~30%. This paper introduces low concentration gas safety conveying technology, engine control system, as well as research on en-gine performance improvements. Gas delivery system uses techniques including water-block fire arrestor technology with automatically controlled water level, corrugated-metal-strip gas pipeline fire extinguishing technology and water mist fire extinguishing tech-nology. Engine control technologies include double-butterfly-gate mixer, low-pressure and large-flow pilot valve pressure control and TEM electronic management system. Through the use of pre-chamber spark plug and high efficiency turbocharger, the engine power was increased from 550kW to 900kW, further power improvement is expected through the use of Miller cycle technology. Until now, low concentra-tion gas generator has a nationwide application, and achieved good economic benefit and environmental benefit.

【会议名称】

第27届CIMAC会议

【会议地点】

上海

【下载次数】

1

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