摘要
通过瓦斯爆炸情形下褐煤的快速热裂解实验,研究了褐煤煤层发生煤矿瓦斯爆炸后褐煤发生次生火灾的机理。基于对褐煤的工业分析和元素分析,应用能够满足瓦斯爆炸特征的居里点快速热裂解仪,对褐煤进行了热作用持续时间分别为1,2,5,10s,热作用温度588～1 313K的快速热裂解实验。对析出气体的最低助燃氧浓度和燃烧浓度极限进行了分析。瓦斯爆炸情形下褐煤热裂解会产生包括CH4,C2H4,C2H6,C2H2,C3H6,C3H8,C4～C5系列,CO,CO2在内的气体,以及焦炭、焦油。除焦炭产量随温度和时间呈减少趋势外,所有气体和焦油的产量均随温度的升高和热作用时间的延长而增加。析出气体中CH4,CO,CO2的比例较大,其余烯烃类气体比例很小。析出的混合气体在一定条件下会发生火灾。
The fast pyrolysis experiment of lignite in the circumstances of methane explosion was carried out so as to study the mechanism of fire disaster of lignite induced by flame of methane explosions. Based on proximate and ele- mental analyses of lignite, the fast pyrolysis experiment of lignite was carried out with heat holding time 1, 2, 5, 10 s, and heating temperature from 588 1 313 K. The minimum oxygen concentration for gas combustion and the limit of ignition concentration of gas from lignite were studied. The results showed that the lignite pyrolysis could produce lots of products includingCH4,G2H4,C2 H6,C2H2,C3H6,bH8,G4-C5, CO, CO2, and tar, jar. All products increased with the increases of temperature and extending time of pyrolysis except for char. The outputs of CH4 , CO and CO2 were much more larger than olefin gas and the gas mixture could be fired under certain condi- tions.
出处
《山东科技大学学报（自然科学版）》
CAS
2012年第2期62-67,共6页
Journal of Shandong University of Science and Technology(Natural Science)
基金
国家科技支撑计划项目(2012BAK04B01)
重庆市自然科学基金项目(cstc2011jjA0959)
关键词
瓦斯爆炸
火焰波
褐煤
快速热裂解
methane explosion
flame wave
lignite
fast pyrolysis
