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N2和CO2对煤明火燃烧灭火性能的对比实验研究

郭志国, 吴兵

郭志国, 吴兵. N2和CO2对煤明火燃烧灭火性能的对比实验研究[J]. 矿业科学学报, 2017, 2(2): 150-157.
引用本文: 郭志国, 吴兵. N2和CO2对煤明火燃烧灭火性能的对比实验研究[J]. 矿业科学学报, 2017, 2(2): 150-157.
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Guo Zhiguo, Wu Bing. Comparative study on the fire-extinguishing effectiveness of N2 and CO2 on coal flame combustion[J]. Journal of Mining Science and Technology, 2017, 2(2): 150-157.
Citation: Guo Zhiguo, Wu Bing. Comparative study on the fire-extinguishing effectiveness of N2 and CO2 on coal flame combustion[J]. Journal of Mining Science and Technology, 2017, 2(2): 150-157.
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N2和CO2对煤明火燃烧灭火性能的对比实验研究

  • 中国矿业大学(北京)资源与安全工程学院,北京100083

基金项目: 国家自然科学基金资助项目(51274205)
详细信息
    作者简介:

    郭志国(1988—),男,江西九江人,博士研究生,主要从事矿井火灾与瓦斯灾害防治方面的研究。

  • 中图分类号: TD75

Comparative study on the fire-extinguishing effectiveness of N2 and CO2 on coal flame combustion

  • College of Resources and Safety Engineering,China University of Mining and Technology,Beijing 100083,China

摘要

    摘要
  • 摘要: 为掌握N2和CO2对煤明火燃烧过程的不同灭火效果,采用自主研制的煤明火燃烧实验装置,对平煤八矿煤样进行了通入相同流量N2和CO2气体灭火剂的煤明火燃烧灭火实验,测定了在煤有焰燃烧和阴燃熄灭阶段的温度场温度、标志性气体(O2、CO和CH4)组分、热释放速率以及火焰图像面积的变化规律。结果表明:相比于煤自由燃烧,在煤有焰燃烧阶段,通入CO2时明火火焰熄灭时间、煤温上升速度、耗氧量、热释放速率以及CO和CH4浓度的下降速度比通入N2时更低;同时,通入CO2时火焰图像面积呈指数下降,而通入N2时呈线性下降;在煤阴燃熄灭阶段,通入CO2时煤温、CO和CH4浓度下降速度比通入N2时的更高,而通入CO2时的耗氧量和热释放速率比通入N2时的更低;说明CO2比N2具有更好的熄灭煤明火燃烧的能力。
    Abstract: In order to master thoroughly the different fire-extinguishing effects of N2 and CO2 on coal flame combustion,the self-developed experiment device of coal flame combustion was used to conduct the fire-extinguishing experiment on coal flame combustion under the condition of importing same flux N2 and CO2 gas fire-extinguishing agent for coal samples in Eight mine of Ping Dingshan coal mine,and the change laws of temperature of temperature field,index gas formation(O2,CO and CH4),heat release rate and flame image area obtained from the experimental stages of the coal flame combustion and smoldering extinguished were measured,The results show that:compared to the free combustion of coal,in coal flame combustion stage,flame out time,coal temperature rise rate,oxygen consumption,heat release rate as well as the speed of CO and CH4 concentration decline in coal combustion with CO2 much lower than that of coal combustion with N2;meanwhile,the flame image area exponentially decline in coal combustion with CO2,but the flame image area linearly decreases in coal combustion with N2,In the coal smoldering extinguishes stage,the coal temperature,the speed of CO and CH4 concentration decline in the coal combustion with CO2 much higher than that of coal combustion with N2,but the oxygen consumption and heat release rate are lower,It follows that CO2 has greater capacity of extinguishing coal combustion compared to N2.
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出版历程
  • 收稿日期:  2016-06-30
  • 刊出日期:  2017-04-28

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