多元可燃气体对CH4爆炸及其自由基发射光谱影响试验

doi:10.16265/j.cnki.issn1003-3033.2020.04.001

中国安全科学学报 ›› 2020, Vol. 30 ›› Issue (4): 1-7.doi: 10.16265/j.cnki.issn1003-3033.2020.04.001

• 安全工程技术 • 下一篇

多元可燃气体对CH₄爆炸及其自由基发射光谱影响试验

罗振敏^1,2,3 教授, 王子瑾^1,2,3, 苏彬^1,2,3, 李逵^1,2,3, 石静^1,2,3

1.西安科技大学安全科学与工程学院,陕西西安 710054;
2.教育部西部矿井开采及灾害防治重点实验室,陕西西安 710054;
3.陕西省工业过程安全与应急救援工程技术研究中心,陕西西安 710054

收稿日期:2020-01-06 修回日期:2020-03-02 出版日期:2020-04-28 发布日期:2021-01-27
作者简介:罗振敏(1976—),女,山东济宁人,博士,教授,博士生导师,主要从事气体粉尘爆炸及防控研究。E-mail:zmluo@xust.edu.cn。
基金资助:
国家重点研发计划资助项目(2017YFC0804702);国家自然科学基金资助(51674193);陕西省自然科学基础研究计划联合基金资助(2019JLM-9);中国博士后科学基金面上项目资助(2019M663780)。

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

LUO Zhenmin^1,2,3, WANG Zijin^1,2,3, SU Bin^1,2,3, LI Kui^1,2,3, SHI Jing^1,2,3

1. College of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an Shaanxi 710054, China;
2. Key Laboratory of Western Mine Exploitation and Hazard Prevention, Ministry of Education, Xi'an Shaanxi 710054, China;
3. Shaanxi Engineering Research Center for Industrial Process Safety and Emergency Rescue, Xi'an Shaanxi 710054, China

Received:2020-01-06 Revised:2020-03-02 Online:2020-04-28 Published:2021-01-27

摘要/Abstract

摘要： 为探究矿井火区多元可燃气体对CH₄爆炸特性的影响,采用20 L多功能球形气体爆炸试验装置开展爆炸试验,采集爆炸压力参数;通过数字示波器得到CH₄爆炸关键自由基OH^*和CH₂O^*的发射光谱信息;从宏观、微观2方面分别分析多元可燃气体对CH₄爆炸特性的影响,并将两者进行关联对比。研究表明:多元可燃气体对CH₄爆炸的影响因氧气含量不同呈现不同特征,贫氧状态下多元可燃气体含量的增加对CH₄爆炸起到抑制作用,随着氧气含量的增加抑制作用逐渐减弱,最后达到富氧状态时变为促进作用;关键自由基发射光谱的相对强度与其对应的爆炸压力参数变化特征基本一致;不同自由基虽然在参与反应过程中整体变化趋势相同,但是受到氧气含量影响程度不同,相对于OH^*而言CH₂O^*在整个反应过程中更易受到氧气含量的影响。

关键词: 预混气体, CH₄爆炸, 多元可燃气体, 爆炸压力, 发射光谱

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

中图分类号:

X932

罗振敏, 王子瑾, 苏彬, 李逵, 石静. 多元可燃气体对CH₄爆炸及其自由基发射光谱影响试验[J]. 中国安全科学学报, 2020, 30(4): 1-7.

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.

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多元可燃气体对CH₄爆炸及其自由基发射光谱影响试验

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

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