Influence of multi-component combustible gases on explosion characteristics and free radical emission spectrum of CH4

doi:10.16265/j.cnki.issn1003-3033.2020.04.001

Abstract

Abstract: In order to investigate influence of multi-component combustible gases on explosion characteristics of CH₄ in fire area of mines, a 20 L multifunctional spherical gas explosion device was used for experiments to collect explosion pressure parameters. Then, emission spectra of key free radicals OH^* and CH₂O^* of CH₄ explosion were obtained through a digital oscilloscope. Finally, influence of multi-component combustible gases on explosion characteristics of CH₄ was analyzed from macro and micro aspects, and they were correlated and compared. The research shows that their influence indicates different characteristics due to different oxygen contents. An increase in multi-component combustible gas content under an oxygen-depleted state can inhibit explosion of CH_4. But its inhibition effect gradually weakens as oxygen content increases until an oxygen-rich state is reached. Relative intensity of key radical emission spectra is basically consistent with corresponding changes of explosion pressure parameters. Although different radicals have the same change trend in participating in reaction process, they are affected by oxygen content to different degrees, and CH₂O*, compared with OH*, is more susceptible to oxygen content during the process.

Key words: multi-component combustible gas, methane explosion, premixed gases, explosion pressure, emission spectrum

CLC Number:

X932

LUO Zhenmin, WANG Zijin, SU Bin, LI Kui, SHI Jing. Influence of multi-component combustible gases on explosion characteristics and free radical emission spectrum of CH₄[J]. China Safety Science Journal, 2020, 30(4): 1-7.

References

[1] 张江,罗振敏,杨忠民.不同可燃气体影响氮气惰化甲烷爆炸的试验[J].安全与环境学报,2019,19(2): 494-501.
ZHANG Jiang, LUO Zhenmin,YANG Zhongmin. Experimental approach to testing the impact of different flammable gases on the inertion of methane explosion via nitrogen[J].Journal of Safety and Environment,2019,19(2): 494-501.
[2] 徐阿猛,陈学习,贾进章.障碍物对瓦斯爆炸冲击波传播的影响研究[J].中国安全科学学报,2019,29(9): 96-101.
XU Ameng,CHEN Xuexi,JIA Jinzhang. Effects of obstacles on gas explosion shock wave propagation[J].China Safety Science Journal,2019,29(9): 96-101.
[3] KUZNETSOV M,CICCARELLI G, DOROFEEV S.DDT in methane-air mixtures[J].Shock Waves,2002, 12(3): 215-220.
[4] 罗振敏,邓军,文虎,等.小型管道中瓦斯爆炸火焰传播特性的实验研究[J].中国安全科学学报,2007,17(5):106-109,1.
LUO Zhenmin,DENG Jun,WEN Hu,et al. Experimental study on flame propagation characteristics of gas explosion in small-scale duct[J].China Safety Science Journal,2007,17(5):106-109,1.
[5] 李鹏.密闭空间瓦斯爆炸温度与压力变化规律研究[D].阜新:辽宁工程技术大学,2015.
LI Peng.Experimental study on flame propagation characteristics of gas explosion in small pipes[D]. Fuxin: Liaoning University of Engineering and Technology,2015.
[6] 祝钊.管道瓦斯爆炸流场及其影响因素数值模拟研究[J].中国矿业大学学报,2017,46(2): 300-305.
ZHU Zhao.Numerical simulation of gas explosion flow field characteristics and influencing factors in pipelines[J].Journal of China University of Mining ＆ Technology,2017,46(2): 300-305.
[7] 李孝斌,张瑞杰,崔沥巍,等.尿素抑制甲烷爆炸过程中爆炸压力与自由基变化耦合分析[J].爆炸与冲击,2020,40(3): 13-23.
LI Xiaobin,ZHANG Ruijie,CUI Liwei,et al. Coupling analysis of explosion pressure and free radical change during methane explosion inhibited by urea[J].Explosion and Shock Waves,2020,40(3): 13-23.
[8] 罗振敏,王涛,文虎,等.CO对CH₄爆炸及自由基发射光谱特性的影响[J].煤炭学报,2019,44(7): 2 167-2 177.
LUO Zhenmin,WANG Tao,WEN Hu,et al. Explosion and flame emission spectra characteristics of CH4-Air mixtures with CO addition[J].Journal of China Coal Society,2019,44(7): 2 167-2 177.
[9] 李孝斌,李会荣,何昆,等. 甲烷爆炸感应期内CN/CH/CHO/CH₂O/NCN特征光谱分析[J].煤炭学报,2014,39(10): 2 042-2 046.
LI Xiaobin,LI Huirong,HE Kun,et al. Analysis of characteristic spectrum of CN/CH/CHO/CH2O/NCN in induction period of methane explosion[J]. Journal of China Coal Society,2014,39(10): 2 042-2 046.
[10] GRERORY P, SMITH D G. Gri-Mech 3.0 [EB/OL]. [2019-06-30].http://www.Me.berkeley.edu/gri_mech/version30/text30.html.
[11] 贾宝山,温海燕,梁运涛,等.受限空间瓦斯爆炸与氢气促进机理研究[J].中国安全科学学报,2012,22(2): 81-87.
JIA Baoshan,WEN Haiyan,LIANG Yuntao,et al. Study on the methane explosion in an enclosed space and hydrogen promoting mechanism [J].China Safety Science Journal,2012,22(2): 81-87.
[12] 刘奎,李孝斌,郑丹.甲烷爆炸感应期内火焰光谱特征分析方法研究[J].光谱学与光谱分析,2015,35(8): 2 067-2 072.
LIU Kui,LI Xiaobin,ZHENG Dan. The study about spectrum characteristic analysis method in the induction period of gas explosion flame[J].Spectroscopy and Spectral Analysis,2015,35(8): 2 067-2 072.
[13] 王利东,李萍,张昌华.正葵烷燃烧反应中OH、CH和C₂自由基的瞬态发射光谱[J].光谱学与光谱分析,2012,32(5): 1 166-1 168.
WANG Lidong,LI Ping,ZHANG Changhua. Transient emission spectra from OH, CH and C₂ free radicals in the combustion reaction of n-decane[J].Spectroscopy and Spectral Analysis,2012,32(5): 1 166-1 168.
[14] LUO Zhenmin, SU Bin, LI Qing, SU B, LI Q, et al. Micromechanism of the initiation of a multiple flammable gas explosion[J]. Energy & Fuels 2019,33: 7 738-7 748.
[15] HOU Jinli, JIN Ping. Reduced mechanism for oxygen/methane combustion based on sensitivity analysis[J]. Journal of Aerospace Power, 2012, 27(7): 1 549-1 554.
[16] 李成兵,吴国栋,周宁,等.N₂/CO₂/H₂O抑制甲烷燃烧数值分析[J].中国科学技术大学学报,2010,40(3): 288-293.
LI Chengbing,WU Guodong,ZHOU Ning,et al. Numerical analysis of methane combustion suppression by N₂/CO₂/H₂O[J].Journal of University of Science and Technology of China,2010,40(3): 288-293.
[17] 陆守香,何杰,于春红,等.水抑制瓦斯爆炸的机理研究[J].煤炭学报,1998,23(4): 83-87.
LU Shouxiang,HE Jie,YU Chunhong,et al. Mechanism of gas explosion suppression by water[J].Journal of China Coal Society,1998,23(4): 83-87.
[18] 杨春丽,刘艳,李祥春.甲烷/空气混合气体爆炸基元反应特征及能量分析[J].煤矿安全,2018,49(5): 171-174.
YANG Chunli,LIU Yan,LI Xiangchun. Elementary reaction characteristics and energy analysis of methane and air mixture exploration[J]. Safety in Coal Mines,2018,49(5): 171-174.

Influence of multi-component combustible gases on explosion characteristics and free radical emission spectrum of CH₄

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