Citation

Yang K, Zhang P, Xing Z, Ji H, Zhou Y, Wang Z. China Saf. Sci. J. 2019; 29(1): 62-67.

Copyright

(Copyright © 2019, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2019.01.011

PMID

unavailable

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 ΔPmax of methane-air mixture, the secondary spraying volume has a certain influence on the maximum explosion overpressure ΔPmax 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 volume can reduce both the average pressure increasing rate and the average flame propagation speed. © 2019 China Safety Science Journal. All rights reserved.

Language: zh