Experimental study on suppression of methane explosion with ultra-fine water mist containing both optimized methane oxidizing bacteria and inorganic salt

doi:10.16265/j.cnki.issn1003-3033.2019.01.011

Abstract

Abstract: To further improve the suppression efficiency of ultra-fine water mist on methane explosion, methane-air explosion inhibition experiments were carried out by using a experiment platform. In the experiments, ultra-fine water mists containing methane-oxidizing bacteria-inorganic salts were used as the inhibitors. Three factors including the degradation time, the first spraying volume and secondary spraying volume were taken into consideration, and orthogonal experiments were carried out. The methane explosion pressure and flame propagation process under different experiment conditions were analyzed. The experimental results show that the effect of methane-oxidizing bacteria degradating methane in the modified medium is better than that in the normal medium;the degradation time has a significant influence on the maximum explosion overpressure ΔP_max of methane-air mixture, the secondary spraying volume has a certain influence on the maximum explosion overpressure ΔP_max of methane-air mixture. The degradation time has a significant influence on the average flame propagation speed,the secondary spraying volume has a certain influence on the average flame propagation speed. Simultaneous increasing both the degradation time and the secondary spraying volumecan reduce both the average pressure increasing rate and the average flame propagation speed.

Key words: methane oxidizing bacteria, methane, ultra-fine water mist, orthogonal experiment, flame, degradation time, spraying volume time

CLC Number:

X932

YANG Ke, ZHANG Ping, XING Zhixiang, JI Hong, ZHOU Yue, WANG Zhuang. Experimental study on suppression of methane explosion with ultra-fine water mist containing both optimized methane oxidizing bacteria and inorganic salt[J]. China Safety Science Journal, 2019, 29(1): 62-67.

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