竖直管道内煤尘浓度对瓦斯爆炸特性影响研究

doi:10.16265/j.cnki.issn1003-3033.2020.03.003

中国安全科学学报 ›› 2020, Vol. 30 ›› Issue (3): 15-20.doi: 10.16265/j.cnki.issn1003-3033.2020.03.003

竖直管道内煤尘浓度对瓦斯爆炸特性影响研究

景国勋^1,2 教授, 张胜旗¹, 段新伟³, 郭绍帅¹, 刘闯¹

1.河南理工大学安全科学与工程学院,河南焦作 454003;
2.安阳工学院,河南安阳 455000;
3.河南能源化工集团青海义海能源有限公司,青海海西州 817000

收稿日期:2020-01-05 修回日期:2020-03-02 出版日期:2020-03-28 发布日期:2021-01-26
作者简介:景国勋(1963—),男,河南襄城人,博士,教授,博士生导师,主要从事安全系统工程、气体粉尘爆炸等方面的研究。E-mail:gxjing@hpu.edu.cn。
基金资助:
国家自然科学基金资助(51774120);国家自然科学基金联合基金重点项目资助(U1904210)。

Impact of coal dust concentration on gas explosion in vertical pipelines

JING Guoxun^1,2, ZHANG Shengqi¹, DUAN Xinwei³, GUO Shaoshuai¹, LIU Chuang¹

1. School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo Henan 454003, China;
2. Anyang Institute of Technology, Anyang Henan 455000, China;
3. Qinghai Yihai Energy Co., Ltd., Henan Energy and Chemical Industry Group Co., Ltd., Haixi Qinghai 817000, China

Received:2020-01-05 Revised:2020-03-02 Online:2020-03-28 Published:2021-01-26

摘要/Abstract

摘要： 为研究不同煤尘质量浓度对瓦斯爆炸的影响,采用自主搭建的竖直管道,开展质量浓度为25、50、100、200 g/m³的4种煤尘与体积分数为9%的瓦斯混合爆炸试验,分析爆炸室和传播管道内爆炸压力及火焰传播变化特征。结果表明:增加煤尘质量浓度,混合爆炸压力减小;爆炸室和传播管道内的爆炸特性对煤尘的敏感性不同,爆炸室内爆炸压力对高浓度煤尘较敏感,传播管道内爆炸压力对低浓度煤尘较敏感;煤尘的参与,能促进爆炸室和传播管道内火焰的发展,而煤尘质量浓度的增加主要影响爆炸室后段中的火焰发展,对传播管道内火焰的发展有明显的促进作用,当煤尘质量浓度为50 g/m³传播管道内火焰发展速度最快。

关键词: 竖直管道, 煤尘质量浓度, 爆炸压力, 爆炸室, 火焰传播

Abstract: In order to study impact of coal dust concentration on gas explosion, experiments were conducted in a self-built vertical pipeline with coal dust concentration of 25, 50, 100 and 200 g/m³ and volume fraction of 9%. Then, change features of gas explosion pressure and flame propagation in explosion chamber and pipeline were analyzed. The results show that as coal dust concentration increases, mixed explosion pressure decreases. Explosion pressure in chambers and pipelines have different sensitivity to coal dust, with the former one being more sensitive to high-concentration coal dust while the latter more sensitive to low-concentration coal dust. It is also found that participation of coal dust can promote development of flames in chambers and pipelines, and an increase in its concentration mainly affects flame development in rear section of chambers, but can obviously promote flame development in pipelines which reaches the fastest as the concentration is 50 g/m³.

Key words: vertical pipeline, coal dust concentration, explosion pressure, explosion chamber, flame propagation

中图分类号:

X936

景国勋, 张胜旗, 段新伟, 郭绍帅, 刘闯. 竖直管道内煤尘浓度对瓦斯爆炸特性影响研究[J]. 中国安全科学学报, 2020, 30(3): 15-20.

JING Guoxun, ZHANG Shengqi, DUAN Xinwei, GUO Shaoshuai, LIU Chuang. Impact of coal dust concentration on gas explosion in vertical pipelines[J]. China Safety Science Journal, 2020, 30(3): 15-20.

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竖直管道内煤尘浓度对瓦斯爆炸特性影响研究

Impact of coal dust concentration on gas explosion in vertical pipelines

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