携煤尘高压气流诱导沉积煤粉爆炸火焰特性研究

发布时间：2018-08-23 19:56

【摘要】：为研究携煤尘高压气流诱导沉积煤粉联合爆炸的火焰特性,采用水平玻璃管煤尘爆炸试验装置,分别对褐煤、长焰煤、不粘煤、气煤等4种煤尘的联合爆炸火焰传播最远距离l和火焰持续时间t等2项火焰特性展开试验分析,并研究沉积煤粉质量m、沉积煤粉粒径r、沉积煤粉中混入CaCO_3岩粉量k对联合爆炸火焰特性的影响。结果表明:随m在0~4.5 g范围内增大,4种煤尘l和t先增大后减小,l和t达到局部极值后减小。4种煤尘的l均随r的增大缓慢减小,且分别在r为26、26、26和38μm时,l依次达最大值106、73、37和22 cm。t_3和t_4随r的增大而增大,甚至当r大于40μm时亦如此。k为6 g时,褐煤、长焰煤l抑制效率分别为62.5%和79.7%,而不粘煤与气煤均不再爆炸。
[Abstract]:In order to study the flame characteristics of the combined explosion of deposited coal powder induced by high pressure airflow with coal dust, the horizontal glass tube coal dust explosion test device was used to treat lignite, long flame coal and non-caking coal, respectively. Two flame characteristics, such as the longest distance l and flame duration t, of combined explosion flame propagation of four kinds of coal dust, such as gas-coal dust, are tested and analyzed. The effects of the mass of deposited pulverized coal (m), the particle size of deposited pulverized coal (r) and the amount of CaCO_3 rock powder mixed in the deposited pulverized coal (k) on the characteristics of the combined explosion flame were studied. The results show that with the increase of m in the range of 0 ~ 4.5 g, the l of 4 kinds of coal dust increases first, then decreases and then decreases to the local maximum, and then decreases to 4 kinds of coal dust slowly with the increase of r. When r is 26 渭 m and 38 渭 m, respectively, the maximum values of T4 and T4 increase with the increase of r, even when r is more than 40 渭 m, when k is 6 g, the lignite increases with the increase of r, and the maximum values of T4 and T4 increase with the increase of r, even when r is more than 40 渭 m, k is 6 g. The inhibition efficiency of long flame coal is 62.5% and 79.7%, respectively.
【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辽宁工程技术大学;
【基金】：国家自然科学基金资助(51204089) 辽宁省自然科学基金资助(201602355) 辽宁省教育厅科研项目(L2014131)
【分类号】：TD714.5

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