废弃煤矿低浓度瓦斯发电效率影响因素及提效措施
董稳军，阳廷孝，于志军，马玉祥
（中节能宁夏新能源股份有限公司，宁夏 银川 750000）
摘要： 为了有效提高废弃煤矿低浓度瓦斯发电机组的发电效率和发电量，对瓦斯发电站机组运行参数进行长期监测、
记录，通过分析各监测数据对瓦斯发电效率的影响和通径系数，得到CH₄体积分数、瓦斯流量、环境温度、气源温度和
厂房温度与发电效率的相关性。结果表明，影响废弃煤矿低浓度瓦斯发电效率最主要的因素为CH₄体积分数，其次为瓦
斯流量。针对关键影响因素提出一种瓦斯分流提纯高、低浓度混合配比工艺，通过提升CH₄体积分数，混合配比达到瓦
斯发电机组发电最佳浓度参数要求，从而提高废弃煤矿低浓度瓦斯发电机组的发电效率。
关键词： 废弃煤矿；低浓度瓦斯；发电效率；分流提纯；CH₄体积分数
中图分类号： TD712⁺.6     文献标识码： A     文章编号： 2095-0802-(2022)01-0012-03
Influencing Factors and Improving Measures of Power Generation Efficiency with
Low-concentration Gas in Abandoned Coal Mines
DONG Wenjun, YANG Tingxiao, YU Zhijun, MA Yuxiang
(CECEP Ningxia New Energy Resources Joint Stock Co., Ltd., Yinchuan 750000, Ningxia, China)
Abstract: In order to effectively improve the power generation efficiency and capacity of low-concentration gas generator units in
abandoned coal mines, the operation parameters of gas generator units were monitored and recorded for a long time. By analyzing
the influence and path coefficient of each monitoring data on gas power generation efficiency, the correlation between volume
fraction of CH₄, gas flow, ambient temperature, gas source temperature and plant temperature and power generation efficiency was
obtained.The results show that the main influencing factor of low-concentration gas power generation efficiency in abandoned coal
mines is the volume fraction of CH₄, followed by gas flow. Aiming at the key influencing factors, a high and low concentration
mixing ratio process of gas separation and purification was proposed. By increasing the volume fraction of CH₄, the mixing ratio
could meet the requirements of the optimal concentration parameters of gas generator set, so as to improve the power generation
efficiency of low-concentration gas generator set in abandoned coal mines.

Key words: abandoned coal mine; low-concentration gas; power generation efficiency; shunt purification; volume fraction of CH₄