氩气协同超细水雾抑制甲烷爆炸试验研究

Experimental study on synergistic gas explosion suppression by argon and ultra-fine water mist

为加强超细水雾对甲烷爆炸的抑制效果,搭建小尺寸半封闭甲烷爆炸试验平台,开展氩气协同超细水雾抑制甲烷爆炸试验。通过单因素和曲面优化试验,测试氩气、超细水雾以及两者的协同作用对甲烷爆炸的抑制效果;从火焰特性、最大爆炸超压和平均升压速率3个方面探究氩气和超细水雾协同抑爆的优越性。结果表明:氩气和超细水雾协同抑制甲烷爆炸效果显著;随着氩气体积分数和超细水雾喷雾量的增加,火焰冲出管道的时间逐渐延长,最大爆炸超压和平均升压速率逐渐降低;其中氩气体积分数10%、超细水雾喷雾量4.2 m L的工况抑制效果最佳;甲烷最大爆炸超压较氩气和超细水雾单独作用下分别下降6.15和2.68 k Pa,说明氩气和超细水雾抑止甲烷爆炸具有协同效应。

In order to improve inhibition effect of ultra-fine water mist on methane explosion,a smallscale and semi-closed methane explosion test platform was built,and experiments on methane explosion inhibition by argon and ultra-fine water mist were carried out.Through tests of single factor test surface optimization,their inhibition separately and collaboratively was tested,and their superiority in synergistic explosion suppression were analyzed from three aspects,flame characteristics,maximum explosive overpressure and average boost rate.The results show that synergistic inhibition effect of argon gas and ultra-fine water mist on methane explosion is remarkable.With increase of the former’s volume fraction and the latter’s amount,time taken for flame to rush out of pipes gradually lengthens,and maximum explosion overpressure and average boost rate gradually decrease.Best inhibition effect is achieved when argon is at10%and ultra-fine water mist spray at 4.2 m L.And maximum explosion overpressure of methane decrease by 6.15 and 2.68 kPa respectively compared with the cases of argon gas and ultra-fine water mist alone,indicating that they have a synergistic effect in inhibiting methane explosion.