温度与CO气体耦合作用对瓦斯爆炸界限影响实验

白刚; 周西华; 宋东平

doi:10.11858/gywlxb.20180612

温度与CO气体耦合作用对瓦斯爆炸界限影响实验

doi: 10.11858/gywlxb.20180612

白刚^{1, 2,},
周西华^{1, 2,*, ,},
宋东平^{1, 2}

1.
辽宁工程技术大学安全科学与工程学院，辽宁阜新　123000
2.
矿山热动力灾害与防治教育部重点实验室（辽宁工程技术大学），辽宁阜新　123000

基金项目: 国家自然科学基金（51274115）；辽宁省教育厅城市研究院重点项目（LJCL001）

详细信息

作者简介:
白　刚（1991－），男，博士，讲师，主要从事矿井瓦斯灾害与火灾防治研究. E-mail：1272661640@qq.com

通讯作者:
周西华（1968－），男，博士，教授，主要从事矿井瓦斯灾害与火灾防治研究. E-mail：xihua_zhou68@163.com

中图分类号: O383
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出版历程
- 收稿日期: 2018-08-09
- 修回日期: 2018-08-26
- 刊出日期: 2018-04-25

Experimental Study on the Coupling Influence of Temperature and CO Concentration on CH₄ Explosion Limit

BAI Gang^{1, 2
,},
ZHOU Xihua^{1, 2,*
, ,},
SONG Dongping^{1, 2}

1.
College of Safety Science & Engineering, Liaoning Technical University, Fuxin 123000, China
2.
Key Laboratory of Mine Thermodynamic Disasters & Control of Ministry of Education(Liaoning Technical University), Fuxin 123000, China

摘要

摘要: 针对煤矿火区封闭过程中常发生的瓦斯爆炸问题，运用20 L爆炸装置，实验研究了不同环境温度(25～200 ℃)和CO浓度(1%～10%，体积分数)条件下瓦斯的爆炸极限和最大爆炸压力。结果表明：单因素可燃性气体CO体积分数升高，瓦斯爆炸上限、下限均下降，爆炸极限范围变宽；温度升高，爆炸上限升高，下限下降；常压条件下，随着温度升高，爆炸上限与初始温度呈二次函数关系变化，爆炸下限与初始温度呈对数关系变化；瓦斯爆炸上限与下限爆炸压力随着初始温度升高均降低，随着CO体积分数升高均升高。多因素高温与CO气体耦合作用下，瓦斯爆炸上限升高，下限下降，瓦斯爆炸危险性增加；初始温度和CO气体对爆炸极限的耦合影响比单一因素的影响大，对爆炸上限的影响更为显著。
- 温度 /
- 可燃性气体CO /
- 爆炸界限 /
- 爆炸危险性
Abstract: Gas explosion often occurs in the course of closing fired coal mine. The explosion limit and maximum explosion pressure under temperatures ranging from 25 ℃ to 200 ℃ and CO volume fractions of 1%−10% are studied by using a special 20 L explosive device. The results show that upper and lower explosion limits all decrease with increasing CO volume fraction, the range of explosion limit is widened in the presence of only CO. The upper gas explosive limit increases while its lower limit decreases as temperature increases. At ambient pressure, the upper gas explosive limit increases quadratically with initial temperature while the lower limit increases logarithmically with initial temperature. Increasing CO volume fraction results in increase in both the upper pressure limit and the lower pressure limit. Coupling CO gas with high temperature, the gas explosive upper limit increases and the lower limit decreases thus higher risk is expected in such condition. Explosive limits, especially the upper limit are more sensitive to coupling factors than to single factor.
- temperature /
- combustible gas CO /
- explosion limit /
- explosion hazard

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图 1 爆炸装置系统示意图

Figure 1. Schematic diagram of explosive device

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图 2 不同温度下瓦斯的爆炸极限（常压）

Figure 2. CH₄ explosion limits under different temperatures （ambient pressure）

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图 3 不同CO浓度时瓦斯爆炸极限（温度100 ℃）

Figure 3. CH₄ explosion limits with different CO concentration（T=100 ℃）

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图 4 瓦斯爆炸压力与温度关系

Figure 4. Relationship between CH₄ explosion pressure and temperature

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图 5 瓦斯爆炸压力与CO体积分数关系

Figure 5. Relationship between CH₄ explosion pressure and CO volume fraction

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图 6 不同CO体积分数下瓦斯爆炸极限与温度的关系

Figure 6. Relationship between CH₄ explosion limits and temperature under different CO concentrations

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图 7 不同温度下瓦斯爆炸极限与CO体积分数的关系

Figure 7. Relationship between CH₄ explosion limit and CO concentration

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图 8 初始温度与CO气体浓度对甲烷爆炸极限的耦合影响

Figure 8. Coupling influence of initial temperature and CO concentration on CH₄ explosion limit

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表 1 实验数据与历史数据对比

Table 1. Comparison of experimental data with historical data

Researchers	LEL/%	UEL/%
Kondo, et al.^[19]	5.0	15.5
Vanderstraeten, et al.^[20]	4.6±0.3	15.8±0.4
Li, et al.^[13]	5.0±0.1	15.7±0.1
This study	5.29	13.16

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表 2 不同温度条件下瓦斯爆炸极限与爆炸压力（常压）

Table 2. CH₄ explosion limit and explosion pressure under different temperatures (ambient pressure)

Temperature/℃	UEL/%	LEL/%	UEL pressure/MPa	LEL pressure/MPa
25	13.16	5.29	0.62	0.100
50	12.50	5.20	0.58	0.081
75	12.40	4.90	0.56	0.073
100	12.30	4.50	0.56	0.073
120	12.40	4.40	0.52	0.065
200	12.80	4.30	0.45	0.052

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表 3 不同CO浓度时瓦斯爆炸极限与爆炸压力（温度100 °C）

Table 3. CH₄ explosion limit and explosion pressure with different concentrations of CO (T=100 °C)

CO concentration/%	UEL/%	LEL/%	UEL pressure/MPa	LEL pressure/MPa
1	17.7	4.5	0.42	0.27
5	16.5	2.8	0.52	0.27
10	16.0	0.7	0.56	0.28

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表 4 温度与CO浓度耦合条件下拟合函数各参数

Table 4. Function fitting parameters under coupling conditions with varying temperatures and CO concentrations

Explosion limit	a	b	c	R²
UEL	15.581 15	0.024 67	–0.257 92	0.863 63
LEL	6.471 86	–0.012 67	–0.470 77	0.990 92

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