Experimental Study on Methane-Coal Dust Mixture Explosion Mitigation by Ultra-Fine Water Mist

摘要：

This paper presents the results of experimental investigation on methane-coal dust mixture explosion mitigation by ultra-fine water mist. Different concentrations of coal dust, different diameters of coal particles and different volumes of ultra-fine water mist were considered. Their effects on methanecoal dust mixture explosion mitigation are discussed. A GigaView High-speed camera was used to visualize the processes while four E12-1-K type fast response thermocouples and two PCB piezotronic pressure transducers were used to obtain the temperature and pressure history of methane-coal dust mixture explosion mitigated with ultra-fine water mist, respectively. The parameters of the maximum explosion pressure, the maximum rate of pressure rise, and the critical volume flux of explosion mitigation with ultra-fine water mist were determined. The results show that the mitigating efficiency of the methanecoal dust mixture explosion by ultra-fine water mist is mainly influenced by the coal dust concentration, coal dust diameter and application volume flux of ultra-fine water mist, i.e., both the maximum explosion overpressure and the maximum rate of overpressure rise increase with increasing of coal dust concentrations, and the larger the coal dust diameter and applied volume flux of ultra-fine water mist are, the easier the explosion can be mitigated.

关键词： coal dust methane-coal dust mixture explosion water mist explosion mitigation fire suppression

作者: XU Hongli WANG Xishi GU Rui ZHANG Heping

作者单位: State Key Lab.of Fire Science, University of Science & Technology of China, Hefei 230026, Anhui, China

会议类型: 国际会议

会议名称: The 2010 International Symposium on Safety Science and Technology(2010 安全科学与技术国际会议)

会议地点: 杭州

会议语种:英文

页码: 1552-1557

在线出版日期: 2010-10-26（万方平台首次上网日期，不代表论文的发表时间）