混合煤质协同作用下煤尘爆炸火焰特性研究

发布时间：2018-03-01 23:20

本文关键词： 煤尘爆炸火焰特性混合煤质无烟煤　出处：《煤炭科学技术》2017年04期 　论文类型：期刊论文

【摘要】：为了研究不同煤质协同作用下煤尘爆炸火焰特性,采用水平玻璃管试验装置,对混合煤质煤尘爆炸火焰长度与火焰持续时间展开研究。结果表明:无烟煤与褐煤混合时,褐煤质量百分比达45%时对无烟煤起到协同爆炸作用,确定了混合煤尘爆炸火焰特性波动敏感区,该类爆炸属于"逆向协同爆炸",肥煤、贫煤与褐煤混合爆炸也属于此类爆炸;长焰煤与褐煤混合爆炸特性曲线中出现"波峰",这是由混合煤粉分子表面活性自由基种类增多导致的,该类爆炸属于"正向协同爆炸"。无烟煤对贫煤、肥煤、长焰煤均起到抑制焰体发展作用,贫煤与无烟煤混合比肥煤与无烟煤混合火焰更长,但火焰持续时间较短,这是由于局部缺氧导致焰体过早破裂。
[Abstract]:In order to study the flame characteristics of coal dust explosion under the synergistic action of different coal quality, a horizontal glass tube test device was used to study the flame length and flame duration of mixed coal dust. The results show that: when anthracite and lignite are mixed, When the mass percentage of lignite reaches 45%, it plays a synergistic role on anthracite, and determines the sensitive zone of flame characteristic fluctuation of mixed coal dust explosion. This kind of explosion belongs to "reverse cooperative explosion", and the mixed explosion of fat coal, lean coal and lignite also belongs to this kind of explosion. The "wave peak" appeared in the characteristic curve of mixed explosion of long flame coal and lignite, which was caused by the increase of surface active free radical species of mixed pulverized coal, which belongs to "positive synergistic explosion". The long flame coal can inhibit the flame development. The mixture of lean coal and anthracite is longer than that of fat coal and anthracite, but the flame duration is shorter, which is due to the premature rupture of the flame due to local hypoxia.
【作者单位】：辽宁工程技术大学安全科学与工程学院;矿山热动力灾害与防治教育部重点实验室;
【基金】：国家自然科学基金资助项目(51204089) 辽宁省教育厅科研资助项目(L2014131) 辽宁省自然科学基金资助项目(201602355)
【分类号】：TD714.5

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