| 大尺度管道中煤粉爆炸的试验研究 |
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| 引用本文： | 李小东,王晶禹,刘庆明.大尺度管道中煤粉爆炸的试验研究[J].中国安全科学学报,2011,21(2). |
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| 作者姓名： | 李小东 王晶禹 刘庆明 |
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| 作者单位： | 1. 中北大学,化工与环境学院,山西,太原,030051
2. 北京理工大学爆炸科学与技术国家重点实验室,北京,100081 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 煤粉爆炸传播特性的试验研究对于深入了解和预防矿井煤尘爆炸事故有重要意义。利用自制的长29.6 m,内径199 mm的试验管道,对煤粉-空气混合物爆炸压力波传播过程进行试验研究。采用压电传感器测量压力信号,得到爆炸压力波沿管道传播过程中不同测点处的压力时间历程曲线,探讨煤粉粒度和浓度对其爆炸超压的影响规律。结果表明:煤粉-空气混和物在弱点火条件下能够实现粉尘火焰的形成和传播。煤粉爆炸压力波传播过程中速度为400~430 m/s,峰值超压为68~72 kPa。煤粉爆炸峰值超压随着煤粉粒度的减小而增大,但煤粉粒度对其爆炸峰值超压的影响程度随着浓度的增加将逐渐减弱。
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| 关 键 词： | 粉尘爆炸 煤粉 爆燃 超压 管道 |
Experimental Study on Coal Dust Explosions in a Large-scale Tube |
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| LI Xiao-dong,WANG Jing-yu,LIU Qing-ming.Experimental Study on Coal Dust Explosions in a Large-scale Tube[J].China Safety Science Journal,2011,21(2). |
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| Authors: | LI Xiao-dong WANG Jing-yu LIU Qing-ming |
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| Institution: | LI Xiao-dong1 WANG Jing-yu1 LIU Qing-ming2(1 College of Chemical Engineering & Environment,North University of China,Taiyuan Shanxi 030051,China 2 State Key Laboratory of Explosion Science & Technology,Beijing Institute of Technology,Beijing 100081,China) |
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| Abstract: | It is significant to study the propagation properties of coal dust explosions by experimental method for the understanding and preventing of coal dust explosion accidents in mining.The propagation of explosion pressure wave in coal dust-air mixture was investigated in a self-made tube with an inner diameter of 199 mm and length of 29.6 m.Piezoelectric pressure sensors were used to record the pressure histories at different points along the tube during the pressure wave propagation process.The influences of ... |
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| Keywords: | dust explosion coal dust deflagration overpressure tube |
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