封闭空间低浓度CO对CH_4爆炸影响的数值模拟  

Numerical Simulation of the Effect of Low CO Concentration on CH_4 Explosion in Closed Space

作　　者：刘玉胜[1,2,3] 王平春 刘风芹[4] 张金东[1,5] 

机构地区：[1]国核工程有限公司,上海200233 [2]煤炭资源与安全开采国家重点实验室,江苏徐州221008 [3]中国矿业大学安全工程学院,江苏徐州221008 [4]江苏大学文法学院,江苏镇江212013 [5]上海理工大学机械工程学院,上海200093

出　　处：《煤矿安全》2013年第5期14-18,共5页Safety in Coal Mines

摘　　要：为了研究煤在低温氧化过程中生成的CO对CH4爆炸产生的影响,首先在理论上分析了CO/CH4/O2/N2混合气体的爆炸下限,依据设定方案开展了充分预混情况下低浓度CO在封闭空间内对CH4爆炸影响的数值模拟。结果表明:相同条件下,CO浓度的增加降低了甲烷爆炸的可能性;而CO比例的增大提高了爆炸威力;对CO、NO2的生成影响最大的3个基元反应均为Rxn#155、Rxn#156和Rxn#158。To discover the effect of CO which is produced by coal during the process of low -temperature oxidation on CH4 explosion, the lower explosion limit of CO/CH4/O2/N2 mixed gas is analyzed, and based on preset scheme, the effect of low CO concentration on CH4 explosion is researched by numerical simulation under perfectly pre - mixed conditions in closed space. The results indicate that the increase of CO concentration reduces the possibility of methane explosion under the same condition; the raise of CO proportion strengthens explosive effect. Three most influential elementary reactions on the production of CO and NO2 are Rxn^#155, Rxn^#156 and Rxn^#158.

关 键 词：封闭空间 CO 瓦斯爆炸 数值模拟 低温氧化 爆炸下限 

分 类 号：TD712[矿业工程—矿井通风与安全]