|本期目录/Table of Contents|

[1]赵建会,张辛亥,程方明.甲烷爆炸过程的近球型爆炸罐定量实验研究[J].中国安全生产科学技术,2014,10(12):23-28.[doi:10.11731/j.issn.1673-193x.2014.12.004]
 ZHAO Jian-hui,ZHANG Xin-hai,CHENG Fang-ming.Quantitatively experimental study on methane explosion by a near-global explosion testing tank[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2014,10(12):23-28.[doi:10.11731/j.issn.1673-193x.2014.12.004]
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甲烷爆炸过程的近球型爆炸罐定量实验研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
10
期数:
2014年12期
页码:
23-28
栏目:
学术论著
出版日期:
2014-12-31

文章信息/Info

Title:
Quantitatively experimental study on methane explosion by a near-global explosion testing tank
作者:
赵建会1张辛亥12程方明12
(1. 西安科技大学能源学院,陕西 西安 710054; 2西部矿井开采及灾害防治教育部重点实验室,陕西 西安 710054)
Author(s):
ZHAO Jian-hui1 ZHANG Xin-hai12 CHENG Fang-ming12
(1. School of Energy, Xi'an University of Science and Technology, Xi'an Shaanxi 710054, China; 2. Western Mine Disaster Prevention and Treatment Key Lab of Ministry of Education, Xi'an Shaanxi 710054, China)
关键词:
甲烷爆炸近球形爆炸罐实验定量研究
Keywords:
methane explosion near-global explosion testing tank experiment quantitative analysis
分类号:
X932
DOI:
10.11731/j.issn.1673-193x.2014.12.004
文献标志码:
A
摘要:
甲烷爆炸是矿井生产中的重大灾害。通过20L密封的球形爆炸罐,实验测试了体积百分比浓度为6%~9%的甲烷爆炸过程中罐内压力的变化,建立了据实验结果计算爆炸过程温度、转化率及各组分浓度等重要参数的数学模型,实现爆炸过程定量研究。研究表明,实验浓度范围内,甲烷初始浓度越大,爆炸最高温度越高,达到最高温度点和终止反应的时间越短,反应最高转化率越大,反应越剧烈。甲烷初始浓度为6%和7%时,爆炸温度变化率和甲烷转化率变化率曲线各出现两个明显的峰,随着甲烷初始浓度升高,第一个峰高度增大,第二个峰高度降低,到甲烷浓度9%时仅剩第一个峰。理论分析认为,第一个峰是自由基链反应、第二个峰值则主要是热着火的结果。本研究对瓦斯爆炸危害评估及预防有重要的作用。
Abstract:
Gas explosion is one of the most serious disasters in mine production. In a 20L enclosed near-global explosion testing tank, a series of explosion experiments were conducted with methane molecular fraction ranging from 6% to 9%, and the pressure change in the tank was real-time recorded during experiments. A mathematical model was set up for calculating temperature, conversion rate of methane and concentration of different gas species. It proved that in the range of tested methane concentration, the larger the methane concentration, the higher the highest explosion temperature in the tank, and the shorter the time needed to attain the highest temperature and to finish the reaction, and the larger the highest conversion rate, the more violence the explosion. As the initial molecular fraction of methane is 6% and 7%, there appear two apparent peaks in the curves of explosion temperature change rate and methane conversion rate to time. As the initial methane concentration rises, the height of the first peak increases and the second peak decreases, until only the first peak left when initial methane molecular fraction rises to 9%. Theoretical analysis showed that the first peak is due to free radical reaction and the second one is due to heat ignition. This study is important for risk evaluation and prevention of gas explosion.

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备注/Memo

备注/Memo:
国家自然科学基金联合基金项目(U1361129);国家自然科学基金青年基金项目(51304155)
更新日期/Last Update: 2014-12-30