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Explosion mitigation of methane‐air mixture in combined application of inert gas and ABC dry powders in a closed compartment
Author(s) -
Li Manhou,
Xu Jingchao,
Li Quan,
Wang Changjian,
Wang Baozhen,
Jiang Jiacheng
Publication year - 2020
Publication title -
process safety progress
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.378
H-Index - 40
eISSN - 1547-5913
pISSN - 1066-8527
DOI - 10.1002/prs.12101
Subject(s) - explosive material , dust explosion , inert , ignition system , methane , settling , inert gas , materials science , gas explosion , dry cleaning , waste management , environmental science , nuclear engineering , chemistry , forensic engineering , composite material , environmental engineering , engineering , aerospace engineering , organic chemistry
The explosion is one of the most serious safety incidents occurring in the application of the gas methane in industrial process. The new developments in attenuating the destruction and environmental hazard of this explosion are conducted using the combined inert gas and ABC dry powder. The explosive characteristic parameters including flame configuration, velocity of flame propagation, explosion pressure, and pressure rising rate are quantified and revealed. The difference of explosion mitigation effect of ordinary and ultra‐fine ABC dry powders are examined based upon the specific surface area and the settling velocity. As the concentration of ordinary or ultra‐fine ABC dry powder increases, the explosion pressure initially increases and decreases afterwards, indicating that there is an optimal mass concentration of explosion mitigation for both powders. The effect of ignition delay time on the explosion mitigation of ultra‐fine ABC dry powder is characterized on the basis of the turbulent lever and the dry powder particle settling state. Moreover, the mechanisms of explosion mitigation with CO 2 and the ultra‐fine ABC dry powder are fully revealed both on the physical and chemical properties. The present research provides basic data and theoretical guidance for prevention and controlling of gas explosion accidents.