English            | 设为主页 | 加入收藏 | 网站导航 | 读者留言 | 联系我们 | 返回首页 |
 
褐煤煤尘爆炸固态残留物粒度变化及气态残留物可燃性分析
Particle size change of solid residue and flammability analysis of gaseous residue of lignite coal dust explosion
【索引】祝超,王浩.褐煤煤尘爆炸固态残留物粒度变化及气态残留物可燃性分析[J].工矿自动化,2021,47(8):69-76.
【Reference】ZHU Chao,WANG Hao.Particle size change of solid residue and flammability analysis of gaseous residue of lignite coal dust explosion[J].Industry and Mine Automation,2021,47(8):69-76.
【DOI】10.13272/j.issn.1671-251x.2021040040
【作者】祝超,王浩
【Author】 ZHU Chao,WANG Hao
【作者机构】江苏安全技术职业学院 工业安全与职业健康学院, 江苏 徐州221011
【Unit】School of Industrial Safety and Career Heath, Jiangsu College of Safety Technology, Xuzhou 221011, China
【摘要】煤尘爆炸固态、气态残留物是分析起爆地点、传播路径的物证及部署救援工作的依据。采用20 L球形爆炸系统对不同浓度、不同粒径的褐煤煤尘进行爆炸实验,分析了褐煤煤尘爆炸固态残留物的粒度变化和气态残留物的可燃性。结果表明:褐煤煤尘爆炸固态残留物的粒度范围较原始褐煤煤尘有所扩大;煤尘浓度一定时,随着煤尘粒径减小,褐煤煤尘爆炸固态残留物的D10变化率趋于负向增大,D50变化率在10%~20%范围内波动,D90变化率趋于正向增大;煤尘粒径一定时,随着煤尘浓度增大,褐煤煤尘爆炸固态残留物的D10先减小后增大,而D50和D90不断增大;褐煤煤尘爆炸气态残留物中主要含有O2,CO,H2,CO2,CH4,C2H6,C2H4,C2H2,C3H6;随着煤尘粒径减小或浓度增大,气态残留物中O2和CO2含量不断减小,CO,H2及CH4等烃类气体含量不断增大;煤尘粒径一定时,100~200 g/m3浓度范围内的褐煤煤尘爆炸气态残留物的可燃性指数小于1,表明气态残留物不可燃,300~600 g/m3浓度范围内的褐煤煤尘爆炸气态残留物的可燃性指数大于1,表明气态残留物可燃;煤尘浓度一定时,180~250 μm粒径范围内的褐煤煤尘爆炸气态残留物的可燃性指数小于1,表明气态残留物不可燃,38~180 μm粒径范围内的褐煤煤尘爆炸气态残留物的可燃性指数大于1,表明气态残留物可燃;气态残留物中H2和CO含量是影响褐煤煤尘爆炸气态残留物是否可燃的关键因素,且H2的影响程度最大,CO次之。
【Abstract】The solid and gaseous residues of coal dust explosion are the physical evidence for analyzing the detonation site and propagation path and the basis for deploying rescue work. The 20 L spherical explosion system is used to conduct explosion experiments on lignite coal dust with different concentrations and particle sizes. And the particle size change of the solid residue and the flammability of the gaseous residue of the lignite coal dust explosion are analyzed. The results show that the particle size range of lignite coal dust explosion solid residues is larger than that of the original lignite coal dust. When the coal dust concentration is constant, as the particle size decreases, the D10 change rate of lignite coal dust explosion solid residues tends to increase negatively, the D50 change rate fluctuates in the range of 10% to 20%, and the D90 change rate tends to increase positively. When the coal dust particle size is constant, as the coal dust concentration increases, the D10 of the lignite coal dust explosion solid residue first decreases and then increases, while the D50 and D90 continue to increase. The lignite coal dust explosion gaseous residue mainly contains O2, CO, H2,CO2,CH4,C2H6,C2H4,C2H2 and C3H6. As the particle size of coal dust decreases or the concentration increases, the content of O2 and CO2 in the gaseous residue decreases continuously, and the content of hydrocarbon gases such as CO, H2 and CH4 increases continuously. When the coal dust particle size is constant, the flammability index of lignite coal dust explosion gaseous residue within the concentration range of 100-200 g/m3 is less than 1, indicating that the gaseous residue is not combustible. The flammability index of lignite coal dust explosion gaseous residue within the concentration range of 300-600 g/m3 is greater than 1, indicating that the gaseous residue is combustible. When the coal dust concentration is constant, the flammability index of lignite coal dust explosion gaseous residue with the particle size of 180-250 μm is less than 1, indicating that the gaseous residue is not combustible. The flammability index of lignite coal dust explosion gaseous residue with the particle size of 38-180 μm is greater than 1, indicating that the gaseous residue is combustible. The content of H2 and CO in the gaseous residue is the key factor affecting the flammability of lignite coal dust explosion gaseous residue. The flammability is mostly affected by H2, followed by CO.
【关键词】 煤尘爆炸; 褐煤煤尘; 固态残留物; 气态残留物; 粒度分析; 可燃性分析; 可燃性指数
【Keywords】coal dust explosion; lignite coal dust; solid residue; gaseous residue; particle size analysis; flammability analysis; flammability index
【文献出处】工矿自动化,2021年8期
【基金】江苏高校“青蓝工程”优秀教学团队项目(苏教师函〔2021〕11号);江苏省高校优秀中青年教师和校长赴境外研修计划资助项目(苏教师函〔2019〕12号)
【分类号】TD714.5
HTML PDF下载
本网站仅提供本刊2009年之后的全文下载,其它年份的全文下载将自动转到中国知网。中国知网不支持迅雷等加速下载工具,请取消加速工具后下载。
【关 闭】