摘要
为探索进气预热温度对煤矿乏风热逆流氧化的影响,对不同进气温度条件下煤矿乏风热逆流氧化的温度场、甲烷转化率、最低甲烷体积分数及最大换向半周期开展了数值模拟和试验研究,结果表明:随着进气预热温度的升高,氧化床高温区域拓宽,而峰值温度变化不明显;随着进气预热温度的不断提高,氧化装置甲烷转化率几乎成线性升高;提高进气预热温度,可以降低装置维持自运行所需的最低甲烷体积分数和延长最大换向半周期,有利于氧化装置的稳定运行。
In order to investigate the effects of preheat temperature on the thermal flow-reversal oxidation of coal mine ventilation return air,the temperature field,the methane conversion rate,the lowest methane concentration and the maximum half cycle of the thermal flow-reversal oxidation of methane in coal mine ventilation return air were studied by numerical simulation and experiments. The study results show that with the increase of preheat temperature,the high-temperature zone widens,and the change of maximum temperature is not obvious. The methane conversion rate increases linearly with the preheat temperature increases. It can also reduce the lowest methane concentration and prolong the maximum half cycle by increasing the preheat temperature,which will be beneficial to the stable operation of oxidation device.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2015年第5期1070-1075,共6页
Journal of China Coal Society
基金
国家自然科学基金资助项目(51306047
51076042)
湖南省自然科学基金青年人才联合基金资助项目(13JJB009)
关键词
煤矿乏风
热逆流氧化
预热温度
coal mine ventilation air methane
thermal flow-reversal oxidation
preheat temperature
