作　　者： ; ; ; ; ;

机构地区： 中国矿业大学安全工程学院

出　　处： 《北京科技大学学报》 2013年第10期1375-1381,共7页

摘　　要： 为研究含水汽低浓度瓦斯气体在多孔介质燃烧器中的燃烧特性,采用计算流体力学方法对其进行数值分析,研究了瓦斯含不同水汽量燃烧时燃烧器中温度分布规律和污染物排放情况.随着瓦斯中水汽含量的增大,燃烧器轴向温度及燃烧热效率下降.由温度二维等值线图可以直观看到不同工况下燃烧器中各个地点的温度分布,为燃烧器设计提供指导.在确保一定热效率时,适当增加水汽含量,可降低燃烧器中NOx排放量,不但可以保护环境,而且有助于CO转化为CO2以控制有毒气体排放量. In order to research the combustion characteristics of low concentration coal mine gas containing aqueous vapor in porous media, numerical analysis was carried out by the computational fluid dynamics （CFD） method. The temperature distribution law and pollutant discharge were studied when the gases with different aqueous vapor contents burnt in a porous media burner. It is shown that the axial temperature and combustion efficiency of the burner decrease with the increase of moisture content in the gas. Temperature distributions at each location in the burner under different working conditions are visualized through two-dimensional temperature contours and they provide guidance for burner design. The NOx discharge amount decreases when the aqueous vapor content increases at appropriate thermal efficiency; this not only contributes to protect the environment, but also is useful to make CO change into CO2 for controlling toxic gas production.

关 键 词： 煤矿瓦斯 燃烧 多孔介质 水汽 数值方法

领　　域： [动力工程及工程热物理]