Suppression effect of CO2-twin fluid water mist on methane/air explosion in vented duct

doi:10.11949/j.issn.0438-1157.20151388

CIESC Journal ›› 2016, Vol. 67 ›› Issue (7): 3101-3108.DOI: 10.11949/j.issn.0438-1157.20151388

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Suppression effect of CO₂-twin fluid water mist on methane/air explosion in vented duct

PEI Bei^1,2, YU Minggao^1,2, CHEN Liwei^1,2, YANG Yong^1,2, NIU Pan^1,2, ZHU Xinna^1,2

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

Received:2015-09-02 Revised:2016-04-11 Online:2016-07-05 Published:2016-07-05
Supported by:
supported by the National Natural Science Foundation of China (U1361205), the Basic and Frontier Research Project of Henan Province in China (152300410100) and the Basic and Advanced Technology Research Project of Henan Province in China (14A620001).

CO₂-双流体细水雾抑制管道甲烷爆炸实验

裴蓓^1,2, 余明高^1,2, 陈立伟^1,2, 杨勇^1,2, 牛攀^1,2, 朱新娜^1,2

1. 煤炭安全生产河南省协同创新中心, 河南焦作 454003;
2. 河南理工大学安全科学与工程学院, 河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地, 河南焦作 454003

通讯作者: 裴蓓
基金资助:
国家自然科学基金项目（U1361205）；河南省科技厅基础与前沿基金项目（152300410100）；河南省教育厅科学技术研究重点项目基础研究计划项目（14A620001）。

Abstract

Abstract:

The experimental study on the synergistic suppression effect of carbon dioxide and ultrafine water mist on stoichiometric premixed methane/air mixture in a vented duct was carried out in this paper. The ultrafine water mist was generated from a twin fluid nozzle. The results indicated that CO₂ and water mist had a synergistic suppression effect on methane/air explosion and the efficiency of explosion suppression was significantly improved. With the increase of mist spraying time, the peak flame propagation speed and peak overpressure decreased obviously. When the pressure of CO₂increased to 0.4 MPa and mist spraying time was more than 3 s, the methane/air mixture cannot be detonated after several times of ignition. It was beneficial to improve the explosion suppression efficiency of water mist.

Key words: gas-liquid flow, carbon dioxide, methane, explosion suppression, synergistic effect, safety

摘要：

搭建了尺寸为120 mm×120 mm×840 mm透明有机玻璃瓦斯爆炸管道实验平台，采用双流体喷嘴将二氧化碳和细水雾送入实验系统，从火焰速度、瓦斯爆炸超压两个方面探讨双流体细水雾的抑爆有效性。实验结果表明CO₂双流体细水雾抑制瓦斯爆炸效果显著。随着喷雾时间的延长，火焰传播速度呈缓慢增加趋势，火焰传播速度峰值大幅降低；爆炸超压曲线呈先增大后缓慢减小的趋势，超压峰值大幅降低；当CO₂压力增至0.4 MPa喷雾时间大于3 s时，经多次点火无法引爆, 说明CO₂-双流体细水雾抑制甲烷爆炸时具有协同效应，有利于提高细水雾的抑爆效率。

关键词: 气液两相流, 二氧化碳, 甲烷, 爆炸抑制, 协同效应, 安全

CLC Number:

TD712

PEI Bei, YU Minggao, CHEN Liwei, YANG Yong, NIU Pan, ZHU Xinna. Suppression effect of CO₂-twin fluid water mist on methane/air explosion in vented duct[J]. CIESC Journal, 2016, 67(7): 3101-3108.

裴蓓, 余明高, 陈立伟, 杨勇, 牛攀, 朱新娜. CO₂-双流体细水雾抑制管道甲烷爆炸实验[J]. 化工学报, 2016, 67(7): 3101-3108.

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Suppression effect of CO₂-twin fluid water mist on methane/air explosion in vented duct

CO₂-双流体细水雾抑制管道甲烷爆炸实验

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