摘要
在内径357 mm、长32.4 m的管道中,以电离探针作为爆炸火焰传播速度的主要检测手段,利用自主研制的爆炸抑制装置,开展了超细粉体云幕抑制体积分数为9.5%的瓦斯爆炸火焰传播的研究。结果表明:触发时间为125 ms条件下,采用超细ABC粉体抑爆剂,能使爆炸火焰传播得到不同程度的抑制,当抑爆剂充装量为800 g时,爆炸火焰得以完全熄灭;就抑爆介质而言,其爆炸抑制效果依次为:超细ABC粉体、超细SiO_2粉体、普通ABC、超细Mg(OH)_2;抑爆装置触发时间大于一临界值时,仅能够减弱火焰传播,而不能将其完全熄灭。
Explosion suppression of methane/air mixtures with methane concentration 9.5% in volume by various ul- trafine powders were conducted in a 32.4 m long pipelines with an internal diameter of 357mm, the self-developed suppressor were applied to discharge the powders and the array of ionization probes were used to measure the flame propagation velocity. Results indicated that flame propagation can be mitigated when different mass of ultrafine ABC powder were discharged with 125 ms in trigger time,the flame propagation can be suppressed entirely while 800 g ul- trafine ABC powder was discharged. The order of uhrafine ABC, uhrafine SiO2, normal partial size ABC and ultrafine Mg（OH）2 powders can be concluded in the suppression efficiency from the present experiments, the flame can＇t be inhibited 100% when the trigger time is above critical.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2017年第6期1482-1488,共7页
Journal of China Coal Society
基金
国家国际科技合作专项资助项目(2013DFG71760)
国家自然科学基金资助项目(51174182)
关键词
超细粉体云幕
瓦斯爆炸
火焰传播
抑制
clouds of uhrafine powders
explosion of methane
flame propagation
suppression
作者简介
王信群（1967-），男，安徽无为人，副教授，博士。E—mail：xinqunwang@cjlu．edu．cn
