Experimental study on the mitigation via an ultra-fine water mist of methane/coal dust mixture explosions in the presence of obstacles

被引：51

作者：

Xu, Hongli ^{[1
]}

Li, Yuan ^{[1
]}

Zhu, Pei ^{[1
]}

Wang, Xishi ^{[1
]}

Zhang, Heping ^{[1
]}

机构：

[1] Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Peoples R China

来源：

JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES | 2013年 / 26卷 / 04期

关键词：

Methane; Coal dust; Mixtures explosion; Explosion mitigation; Water mist; SIMULATION; FLAMES;

D O I：

10.1016/j.jlp.2013.02.014

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this paper, experimental investigations were performed for the mitigation via an ultra-fine water mist of methane/coal dust mixture explosions in the presence of obstacles to reveal the effects of the obstacles in this scenario. Two PCB piezo-electronic pressure transducers were used to acquire the pressure history, a Fastcam Ultima APX high-speed video camera was used to visualize both the process of the mixture explosion and its mitigation. The diameters of the coal dust, the types of obstacles and the volumes of ultra-fine water mist were varied in the tests. The parameters of the explosion overpressure and the range of critical volume flux of the ultra-fine water mist for explosion mitigation were determined. The results show that the mixture explosion and its mitigation are primarily influenced by the number, shape and set locations of the obstacles. When the volume flux of the water mist is larger than a certain amount, the mixture explosions and the effects of obstacles can be completely mitigated with the ultra-fine water mist. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：815 / 820

页数：6