N<sub>2</sub>和CO<sub>2</sub>对煤明火燃烧灭火性能的对比实验研究

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

郭志国,
吴兵

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。

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出版历程
- 收稿日期: 2016-07-01
- 刊出日期: 2017-04-29

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

Guo Zhiguo,
Wu Bing

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

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。
- N₂ /
- CO₂ /
- 煤明火燃烧 /
- 标志性气体 /
- 火焰图像 /
- 灭火性能
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 CO₂gas 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 CH₄concentration 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.
- N₂ /
- CO₂ /
- coal flame combustion /
- index gas /
- flame image /
- fire-extinguishing effectiveness

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参考文献(22)

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N₂和CO₂对煤明火燃烧灭火性能的对比实验研究

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。

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

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留言板

N2和CO2对煤明火燃烧灭火性能的对比实验研究

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。

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出版历程

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

计量

出版历程

目录

N₂和CO₂对煤明火燃烧灭火性能的对比实验研究

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。

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