雾
甲烷
燃烧
煤尘
煤
粉尘爆炸
粒子(生态学)
热解
化学
废物管理
材料科学
化学工程
环境科学
地质学
气象学
工程类
物理
海洋学
有机化学
作者
Xiujuan Feng,Jingjie Ren,P. G. Min,Biao Chen,Mingshu Bi
标识
DOI:10.1016/j.powtec.2022.117590
摘要
Methane and coal dust hybrid explosion and its suppression have always been a hot issue. In this study, the suppression effect of ultra-fine water mist on methane coal dust mixed explosion was investigated experimentally and numerically. The pressure of the hybrid explosion was significantly reduced and the pressure rising process was delayed by applying ultra-fine water mist. The results show that the microscopic processes of methane combustion, particle pyrolysis, and particle combustion have a definite time sequence during the explosion. Analysis of the suppression mechanism indicates that the contribution of the fixed carbon combustion to the explosion pressure decreases the most in three sub-processes by 50.8% with the addition of water mist under fuel-lean combustion. Meanwhile, the contribution of the volatile component devolatilization to the explosion pressure decreases the most in three sub-processes by 36.3% and 40.8% with the addition of water mist under stoichiometric combustion and fuel-rich combustion, respectively.
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