携煤尘高压气流诱导沉积煤粉爆炸火焰特性研究

doi:10.16265/j.cnki.issn1003-3033.2017.05.011

中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (5): 58-63.doi: 10.16265/j.cnki.issn1003-3033.2017.05.011

携煤尘高压气流诱导沉积煤粉爆炸火焰特性研究

李雨成^1,2 副教授, 刘天奇^1,2, 周西华^1,2 教授, 刘蓉蒸^1,2

1 辽宁工程技术大学安全科学与工程学院,辽宁阜新 123000;
2 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,辽宁阜新 123000

收稿日期:2017-01-10 修回日期:2017-04-06 出版日期:2017-05-20 发布日期:2020-10-30
作者简介:李雨成 (1978—),男,内蒙古赤峰人,博士,副教授,博士生导师,主要从事矿井通风与粉尘防治技术及理论研究。E-mail:lyclntu@163.com。
基金资助:
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)。

Flame characteristics of deposited coal powder explosion induced by high-pressure airflow carrying coal dust

LI Yucheng^1,2, LIU Tianqi^1,2, ZHOU Xihua^1,2, LIU Rongzheng^1,2

1 School of Safety Science and Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China;
2 Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education(Liaoning Technical University), Fuxin Liaoning 123000, China

Received:2017-01-10 Revised:2017-04-06 Online:2017-05-20 Published:2020-10-30

摘要/Abstract

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CaCO₃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38 μm时,l依次达最大值106、73、37 和22 cm。t₃和t₄随r的增大而增大,甚至当r大于40 μm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。

关键词: 煤尘爆炸, 高压气流, 沉积煤粉, 火焰特性, CaCO₃粉末

Abstract: In order to study flame characteristics of combined explosion of coal dust carried by high pressure airflow and induced deposited coal powder, experiments were carried out on samples of the lignite, long flame coal, non-stick coal and gas coal by using a horizontal glass tube test device. Effects of the mass of deposited coal powder(m), the particle size of deposited coal powder(r) and the mass of CaCO\-3 mixed with deposited coal powder(k) on flame characteristics of combined explosion, the longest distance of flame propagation(l) and the duration of flame(t)were studied. Study result shows that with the increase of m in the range of 0-4.5 g, l and t of four kinds of coal dust increase first and then decrease, after l and t reach the local maximum value, they begin to decrease, that for these four kinds of coal dust, l decreases slowly with the increase of r, that the maximum values of l are 106, 73, 37 and 22 cm respectively. t\-3 and t\-4 increase with the increase of r, even when r> 40 μm and that when k=6 g, the inhibitory efficiency of lignite and long flame coal are 62.5% and 79.7% respectively, while the non-stick coal and the gas coal are no longer explosive.

Key words: coal dust explosion, high pressure air, cumulated coal powder, flame characteristic, CaCO₃ powder

中图分类号:

X932

李雨成, 刘天奇, 周西华, 刘蓉蒸. 携煤尘高压气流诱导沉积煤粉爆炸火焰特性研究[J]. 中国安全科学学报, 2017, 27(5): 58-63.

LI Yucheng, LIU Tianqi, ZHOU Xihua, LIU Rongzheng. Flame characteristics of deposited coal powder explosion induced by high-pressure airflow carrying coal dust[J]. China Safety Science Journal, 2017, 27(5): 58-63.

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携煤尘高压气流诱导沉积煤粉爆炸火焰特性研究

Flame characteristics of deposited coal powder explosion induced by high-pressure airflow carrying coal dust

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