Secondary explosions in relief duct during aluminum dust explosion venting

摘要：

　　Experiments of aluminum dust explosion venting were conducted with a cylindrical vessel of 68 mm internal diameter and 305 mm height connected with a relief duct of 25 mm internal diameter.The relief duct length and the dust concentration could be adjusted.Four piezoelectric pressure transducers were used to record the pressure characteristics in both the vessel and relief duct.The results indicate that,secondary explosion occurs when the relief duct and dust concentration are no less than 1 500 mm and 500 g·m-3,respectively.The occurrence of secondary explosion is probabilistic,with probability ranging from 17% to 50%.The second pressure peak appears in the duet because of secondary explosion.The residual unburnt combustible mixture in vessel re-reacts due to the disturbance of secondary explosion and hence the secondary pressure peak also appears in the vessel.

关键词： dust explosion venting relief duct secondary explosion secondary pressure peak

作者: YAN Xingqing LI Di YU Jianliang

作者单位: School of Chemical Machinery,Dalian University of Technology,No 2,Ling Gong Road,Dalian 116024,Liaoning,China

会议类型: 国际会议

会议名称: 2012 International Symposium on Safety Science and Technology (2012安全科学与技术国际会议)

会议地点: 南京

会议语种:英文

页码: 431-434

在线出版日期: 2012-10-23（万方平台首次上网日期，不代表论文的发表时间）