摘要
为实现主动式喷粉抑爆系统的最佳抑爆效果,基于5 L管道爆炸试验平台,测试喷粉压力对碳酸氢钾(KHCO_(3))冷气溶胶分散状况的影响,并开展KHCO_(3)冷气溶胶对于9.5%甲烷-空气预混气体爆炸的抑制试验,考察了不同喷粉压力下形成的KHCO_(3)冷气溶胶对甲烷爆炸压力及火焰传播的抑制效果。结果表明:喷粉压力显著影响KHCO_(3)冷气溶胶的分散状况,进而影响其甲烷抑爆效果,KHCO_(3)冷气溶胶在低喷粉压力下难以分散且抑爆效果不佳,仅对前期火焰产生抑制作用;随着喷粉压力增加,KHCO_(3)冷气溶胶抑爆效果逐渐提升,甲烷爆炸火焰传播减缓,最大爆炸压力降低;但当KHCO_(3)冷气溶胶得到充分分散时,继续增加喷粉压力对其抑爆效果提升很小。
In order to achieve optimum suppression effect of active dusting explosion suppression system,influence of dispersion pressure on dispersion of KHCO_(3) cold aerosols was tested,and suppression experiment of the aerosol on explosion of 9.5% methane-air premixed gas was carried out via a 5 L tube testing platform.And suppression effect of KHCO_(3) cold aerosols on methane explosion pressure and flame propagation under different dispersion pressure was investigated.The results show that dispersion pressure significantly impacts dispersion of KHCO_(3) cold aerosol,thereby affecting its suppression performance on methane explosion.When at low pressure,the aerosol is hard to disperse,so it shows poor explosion suppression effect and can only inhibit early stage flame.But as the pressure increases,its suppression effect gradually improves.However,when it is fully dispersed,such effect can rarely be improved by continuing to increase dispersion pressure.
作者
王燕
林森
李忠
温小萍
郑立刚
纪文涛
WANG Yan;LIN Sen;LI Zhong;WEN Xiaoping;ZHENG Ligang;JI Wentao(College of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo Henan 454000,China;State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization,Henan Polytechnic University,Jiaozuo Henan 454000,China;School of Mechanical and Power Engineering,Henan Polytechnic University,Jiaozuo Henan 454000,China)
出处
《中国安全科学学报》
CSCD
北大核心
2021年第7期70-75,共6页
China Safety Science Journal
基金
国家自然科学基金资助(51874120,51904094)
中国博士后科学基金资助(2020M672228)
河南省重点研发与推广专项(科技攻关)(202102310292)。
关键词
喷粉压力
KHCO3冷气溶胶
抑爆效果
甲烷抑爆
分散状况
dispersion pressures
KHCO_(3)cold aerosol
explosion suppression effect
methane explosion suppression
dispersion condition
