N<sub>2</sub>双流体细水雾抑制管道瓦斯爆炸实验研究

余明高; 杨勇; 裴蓓; 牛攀; 朱新娜

doi:10.11883/1001-1455(2017)02-0194-07

N₂双流体细水雾抑制管道瓦斯爆炸实验研究

doi: 10.11883/1001-1455(2017)02-0194-07

余明高^{1, 2},
杨勇^{1, 2},
裴蓓^{1, 2, ,},
牛攀^{1, 2},
朱新娜^{1, 2}

1.
河南理工大学安全科学与工程学院，河南焦作 454003
2.
河南省瓦斯地质与瓦斯治理重点实验室，河南焦作 454003

基金项目:

国家自然科学基金项目 U1361205

国家自然科学基金项目 50974055

国家自然科学基金项目 51604095

河南省教育厅基础研究计划项目 14A620001

河南省科技厅基础与前沿基金项目 152300410100

详细信息

作者简介:
余明高(1963-)，男，教授，博士生导师

通讯作者:
裴蓓, pb128@hpu.edu.cn

中图分类号: O389
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- 被引次数: 0
出版历程
- 收稿日期: 2015-08-14
- 修回日期: 2015-11-03
- 刊出日期: 2017-03-25

Experimental study of methane explosion suppression by nitrogen twin-fluid water mist

Yu Minggao^{1, 2},
Yang Yong^{1, 2},
Pei Bei^{1, 2
, ,},
Niu Pan^{1, 2},
Zhu Xinna^{1, 2}

1.
School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan, China
2.
State Key Laboratory of Cultivation Bases Gas Geology and Gas Control, Jiaozuo 454003, Henan, China

摘要

摘要: 为了在较低压力下获得较小粒径的细水雾，降低喷雾抑爆系统的运行成本，提高系统的适用性和抑爆效率，自行搭建了尺寸为120 mm×120 mm×840 mm的透明有机玻璃瓦斯爆炸管道实验平台。采用双流体喷嘴将N₂和细水雾送入试验管道，通过调节喷雾压力和喷雾时间开展了双流体细水雾抑制瓦斯爆炸实验研究，从火焰速度、瓦斯爆炸超压2个方面探讨双流体细水雾的抑爆有效性。实验结果表明：N₂双流体细水雾抑爆效果明显，可以减小瓦斯爆炸强度；随着喷雾时间的延长，爆炸火焰的速度峰值逐渐下降，爆炸超压峰值逐渐下降，平均升压速率逐渐降低；当N₂压力为0.4 MPa、喷雾时间为3 s时，速度峰值比不喷雾时下降60.39%，爆炸超压峰值下降37.76%。
- 双流体 /
- 氮气 /
- 细水雾 /
- 甲烷爆炸
Abstract: In this work, to obtain a water mist with a finer particle size under lower pressures, reduce the running costs of the explosion-suppressing spray system, and improve its efficiency and applicability, we designed a transparent organic glass pipeline (120 mm×120 mm×840 mm) as the experimental platform for gas explosion. Then N₂ and fine water mist was pressed into the pipeline using a twin-fluid nozzle and experimental study of methane explosion suppression by nitrogen twin-fluid water mist was carried out adjusting the spray pressure and spray time and the explosion-suppression effectiveness of the twin-fluid water mist was investigated via analysis of the flame speed and the gas explosion overpressure. The results show that this twin-fluid water mist has a high explosion-suppressing efficiency, capable of reducing the damage degree of gas explosion. With the extension of the spray time, the peak value of the explosion flame speed, the peak overpressure and the average pressure rise rate decreased gradually. When the pressure of N₂ was 0.4 MPa and the spray time was 3 s, the peak value of the velocity decreased by 60.39%, and the peak overpressure decreased by 37.76%.
- twin-fluid /
- nitrogen /
- fine water mist /
- gas explosion

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图 1 实验系统图

Figure 1. Experimental stytem

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图 2 相同时刻火焰锋面位置对比图

Figure 2. Comparison of flame front position at the same moment

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图 3 N₂双流体细水雾火焰传播速度

Figure 3. Flame propagation velocity with N₂ twin-fluid

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图 4 N₂双流体细水雾火焰速度峰值

Figure 4. Peak velocity of flame with N₂ twin-fluid

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图 5 N₂双流体细水雾压力曲线

Figure 5. Pressure curve with N₂ twin-fluid

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图 6 N₂双流体细水雾爆炸超压峰值

Figure 6. Peak explosion pressure with N₂ twin-fluid

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表 1 不同压力不同喷雾时间下速度峰值的下降比例

Table 1. Decline proportion of the peak velocity under different pressure and at different times

工况	速度峰值/ (m·s^-1)	下降比例/ %
N₂-0.2 MPa-1 s	14.10	17.01
N₂-0.2 MPa-2 s	13.18	22.43
N₂-0.2 MPa-3 s	11.73	30.96
N₂-0.3 MPa-1 s	14.04	17.36
N₂-0.3 MPa-2 s	12.25	27.90
N₂-0.3 MPa-3 s	7.27	57.20
N₂-0.4 MPa-1 s	13.96	17.83
N₂-0.4 MPa-2 s	11.78	30.66
N₂-0.4 MPa-3 s	6.73	60.39

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表 2 不同压力不同喷雾时间下超压峰值的下降比例

Table 2. Decline proportion of the peak overpressure under different pressure and at different times

工况	超压峰值/ (10⁴ Pa)	下降比例/ %
N₂-0.2 MPa-1 s	2.978 2	6.68
N₂-0.2 MPa-2 s	2.792 2	12.51
N₂-0.2 MPa-3 s	2.179 3	31.72
N₂-0.3 MPa-1 s	2.917 2	8.59
N₂-0.3 MPa-2 s	2.776 8	12.99
N₂-0.3 MPa-3 s	1.996 3	37.45
N₂-0.4 MPa-1 s	2.814 5	11.81
N₂-0.4 MPa-2 s	2.202 9	30.98
N₂-0.4 MPa-3 s	1.986 4	37.76

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表 3 不同压力不同喷雾时间下平均升压速率

Table 3. Average pressure rise rate under different pressure and at different times

工况	平均升压速率/(kPa·s^-1)
N₂-0.2 MPa-1 s	495
N₂-0.2 MPa-2s	400
N₂-0.2 MPa-3s	235
N₂-0.3 MPa-1 s	402
N₂-0.3 MPa-2 s	327
N₂-0.3 MPa-3 s	218
N₂-0.4 MPa-1 s	335
N₂-0.4 MPa-2 s	248
N₂-0.4 MPa-3 s	181

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