四氟乙烷对甲烷/空气爆炸特性的影响

doi:10.16085/j.issn.1000-6613.2017-0351

化工进展 ›› 2017, Vol. 36 ›› Issue (10): 3596-3603.DOI: 10.16085/j.issn.1000-6613.2017-0351

四氟乙烷对甲烷/空气爆炸特性的影响

路长^1,2, 刘洋^1,2, 于子凯^1,2, 潘荣锟^1,2, 刘磊^1,2, 滕飞^1,2

1. 河南理工大学瓦斯地质与瓦斯治理国家重点实验室培育基地, 河南焦作 454003;
2. 河南理工大学煤炭安全生产河南省协同创新中心, 河南焦作 454003

收稿日期:2017-03-07 修回日期:2017-05-26 出版日期:2017-10-05 发布日期:2017-10-05
通讯作者: 路长(1975-),男,副教授,主要从事消防工程、安全工程领域的教学与科研工作.
作者简介:路长(1975-),男,副教授,主要从事消防工程、安全工程领域的教学与科研工作.E-mail:luch@hpu.edu.cn.
基金资助:
国家自然科学基金（51674103，51304070，50906023）及河南省高等学校青年骨干教师资助计划（2011GGJS-051）项目。

Experimental study on the effects of R134a on the characteristics of methane/air explosion

LU Chang^1,2, LIU Yang^1,2, YU Zikai^1,2, PAN Rongkun^1,2, LIU Lei^1,2, TENG Fei^1,2

1. State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo 454003, Henan, China;
2. Henan Province Collaborative Innovation Center of Coal Safety Production, Henan Polytechnic University, Jiaozuo 454003, Henan, China

Received:2017-03-07 Revised:2017-05-26 Online:2017-10-05 Published:2017-10-05

摘要/Abstract

摘要： 通过实验来研究四氟乙烷（R134a）对甲烷/空气爆炸的影响。在自主搭建的小尺寸甲烷管道爆炸平台上，观测R134a的加入对甲烷爆炸过程及压力、火焰传播速度产生的影响，并对此进行定性、定量分析。结果表明：各次实验中，R134a的加入会延迟破膜时间，但破膜压力主要受泄爆膜自身影响，保持在8kPa左右；当甲烷浓度一定时，随着管内R134a体积分数的增大，火焰传播速度逐渐变小；甲烷浓度接近当量比时，R134a量的改变对管内火焰传播时间延迟的影响减小，但对超压的抑制作用仍很大；在加入体积分数为2.67%的R134a后，9.0%、9.5%、10.0%浓度的超压峰值分别降低了25.34%、61.78%、38.73%，火焰传播时间延长至未加的1.28倍、1.423倍、1.17倍。R134a能够有效抑制爆炸的机理主要在于分解产生的自由基对碳氢燃料氧化链式反应具有很强的干扰和阻断作用。

关键词: 爆炸, 安全, 甲烷, 抑制, 四氟乙烷

Abstract: In order to study the inhibitory effect of R134a(CH₂FCF₃)on methane/air explosion,the experimental tube system for explosion was set up. In the experiments,with and without R134a,the explosion processes were observed,and pressures and flame propagation velocities were measured. Then, the inhibitory effect of R134a was analyzed qualitatively and quantitatively. The results showed that the PVC film is broken by itself at the pressure about 8kPa,uncorrelated with the amount of R134a. But the broken moment is delayed with the spraying amount of R134a. Under the same methane concentration,the flame propagation velocity decreases gradually in the tube with the increase of the R134a concentration. When the CH₄ concentration is close to the equivalent ratio,the influence of R134a to suppress the flame propagation becomes smaller,but the inhibitory effect on the overpressure is still great. When a volume fraction of 2.67% R134a is added to initial methane/air mixtures with methane concentrations at 9.0%,9.5% and 10.0%,the peak values of overpressure reduce 25.34%,61.78%,38.73%, respectively,and the average flame propagation velocities are slow down to 1.28, 1.423 and 1.17 times respectively. The inhibition of R134a is mainly due to the mechanism that free radical produced by R134a strongly disturbs and impedes the normal oxidative chain of gas fuel and oxygen.

Key words: explosion, safety, methane, inhibition, tetrafluoroethane(CH₂FCF₃)

中图分类号:

X932

路长, 刘洋, 于子凯, 潘荣锟, 刘磊, 滕飞. 四氟乙烷对甲烷/空气爆炸特性的影响[J]. 化工进展, 2017, 36(10): 3596-3603.

LU Chang, LIU Yang, YU Zikai, PAN Rongkun, LIU Lei, TENG Fei. Experimental study on the effects of R134a on the characteristics of methane/air explosion[J]. Chemical Industry and Engineering Progress, 2017, 36(10): 3596-3603.

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四氟乙烷对甲烷/空气爆炸特性的影响

Experimental study on the effects of R134a on the characteristics of methane/air explosion

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