粉尘-CO/H_2杂混合物爆燃特性研究  

Experimental study on deflagration parameters of dust-CO/H_2 hybrid mixture

作　　者：刘原一[1] 李文广 谭厚章[1] 张兰 王学斌[1] 

机构地区：[1]西安交通大学热流科学与工程教育部重点实验室,陕西西安710049 [2]河南省锅炉压力容器安全检测研究院,河南郑州450008

出　　处：《爆炸与冲击》2017年第2期215-220,共6页Explosion and Shock Waves

基　　金：国家自然科学基金项目(51376147);国家自然科学基金青年科学基金项目(51406149)

摘　　要：实验研究了半开放环境下煤粉-CO/H_2杂混合物中粉尘种类、粒径、质量浓度对其爆燃特性的影响规律。结果表明:杂混合物中粉尘颗粒对爆燃特性的影响主要是挥发分析出吸热和挥发分参与反应两种作用相互竞争的结果。对于高挥发分煤粉,挥发分析出参与反应占主要地位,混合物的爆燃强度随着挥发分含量升高而逐渐升高;对于低挥发分煤粉,挥发分析出的吸热作用大于挥发分参与反应的作用,导致了爆燃强度的降低。对于银北煤等普通烟煤,随着粉尘质量浓度的增加,混合物的爆燃强度呈U型变化趋势;对于低挥发分的焦炭粉末,其爆燃强度随粉尘质量浓度的变化不明显。In the present work,we carried out an experimental study of the influence of the coal dust categories,concentration and particle size on the coal dust-CO/H2 hybrid mixture＇s deflagration characteristics in a semi-open environment.The results indicate that the influence of the dust on the hybrid mixture＇s deflagration is mainly the outcome of the competitive relation between two opposite effects,the heat absorption for volatile releasing and the reaction of the released volatile.For the high volatile coal dust,the deflagration reaction of the released volatile dominates,which makes the deflagration severity gradually rise with the rising of the volatile content;while for the low volatile coal dust,the heat absorption for the volatile dominates,which reduces the deflagration severity.For bitumite like the Yinbei coal,with the increase of the dust concentration,the deflagration severity varies with a Ushaped tendency,while for the coke dust with a low volatile content,the change of the deflagration severity with the dust concentration is not obvious.

关 键 词：爆燃 粉尘 一氧化碳 氢气 锅炉 

分 类 号：O389[理学—流体力学] TK16[理学—力学]