含NaCl超细水雾对不同阻塞率管道内爆炸的抑制

贾海林; 项海军; 李第辉; 翟汝鹏

doi:10.11883/bzycj-2019-0268

含NaCl超细水雾对不同阻塞率管道内爆炸的抑制

doi: 10.11883/bzycj-2019-0268

贾海林^{1, 2,},
项海军^{1, 2},
李第辉^{1, 2},
翟汝鹏^{1, 2}

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

基金项目: 国家重点研发计划（2018YFC0807900）；国家自然科学基金(51304069)；教育部创新团队发展支持计划（IRT_16R22）

详细信息

作者简介:
贾海林（1980－　），男，博士，副教授，jiahailin@hpu.edu.cn

中图分类号: O389; X932
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出版历程
- 收稿日期: 2019-07-10
- 修回日期: 2019-11-05
- 网络出版日期: 2020-03-25
- 刊出日期: 2020-04-01

Suppression of explosion in pipelines with different blocking ratios by ultrafine water mist containing sodium chloride

JIA Hailin^{1, 2
,},
XIANG Haijun^{1, 2},
LI Dihui^{1, 2},
ZHAI Rupeng^{1, 2}

1.
State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo 454000, Henan, China
2.
School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China

摘要

摘要: 针对长距离输气管道频发的爆炸问题，在自行搭建的水平透明管道平台中开展了含NaCl超细水雾对不同阻塞率管道爆炸特性的影响研究。通过对瓦斯爆炸压力、火焰传播速度等特征参数进行分析，探究含NaCl超细水雾与不同阻塞率泄压口对爆炸特性的影响规律。结果表明：仅在不同阻塞率（0、0.2、0.4和0.6）的泄压口作用下的管道瓦斯爆炸，爆炸超压随着管道阻塞率的增大而增强，阻塞率与火焰锋面传播至管道末端时间呈非线性关系，在阻塞率为0.2时火焰平均速度最快；两者共同作用下，雾通量为8.4 mL、质量分数为8%的NaCl超细水雾阻火抑爆效果最佳，最大爆炸压力下降幅度可达59.2%；含NaCl超细水雾直接作用于爆炸火焰从而抑制爆炸传播。
- 含氯化钠超细水雾 /
- 瓦斯爆炸 /
- 阻塞率 /
- 爆炸压力 /
- 火焰传播
Abstract: This work aims at the explosion problem in long-distance gas pipelines. An experimental study on the influence of ultrafine water mist with NaCl on the gas explosion characteristics of pipes with different blocking ratios was carried out in a self-built horizontally transparent duct. Such effects are quantified via the analysis of pressure and flame speed. The results show that the explosion overpressure increases with the increase of the pipeline blocking ratio in such gas explosion of the pipeline that is only under the pressure relief ports with different blocking ratios (0, 0.2, 0.4 and 0.6). Under the action of ultrafine water mist, the blocking ratio varies nonlinear with the time of flame front movement propagation to the end of the pipe. When the blocking rate is 0.2, the average flame velocity is the highest. When the fog flux is 8.4 mL and mass fraction of NaCl in it is 8%, the ultrafine water mist containing NaCl has the best fire and explosion suppression effect as the maximum explosion pressure drops by 59.2%. The ultra-fine mist containing NaCl acts directly on the explosion flame to suppress the explosion.
- ultrafine water mist containing sodium chloride /
- gas explosion /
- blocking ratio /
- explosion pressure /
- flame propagation

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图 1 实验系统

Figure 1. The experimental system

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图 2 超声雾化过程

Figure 2. Ultrasonic atomization process

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图 3 不同阻塞率对爆炸压力的影响

Figure 3. Influence of different blocking ratios on explosion pressure

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图 4 不同阻塞率下火焰锋面位置的变化

Figure 4. Flame front position varying with time at different blocking ratios

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图 5 不同阻塞率下管道B内火焰速度的变化

Figure 5. Flame speed in pipe B varying with time at different blocking ratios

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图 6 火焰平均速度和最大爆炸压力与阻塞率的变化关系

Figure 6. Average flame speed and maximum explosion pressure varying with blocking ratio

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图 7 含NaCl超细水雾对不同阻塞率下爆炸压力的影响

Figure 7. Effect of ultrafine water mist containing NaCl on explosion overpressure for different blocking ratios

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图 8 含NaCl质量分数为8%的超细水雾作用下不同阻塞率火焰锋面位置变化

Figure 8. Change in flame front positions for different blocking ratios under the action of ultrafine water mist containing NaCl with the mass fraction of 8%

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图 9 不同阻塞率下超细水雾对最大爆炸压力的影响

Figure 9. Effect of ultrafine water mist on the maximum explosion pressure at different blocking ratios

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图 10 不同阻塞率下超细水雾对火焰平均速度影响

Figure 10. Effect of ultrafine water mist on the average flame speed at different blocking ratios

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图 11 含NaCl超细水雾作用下火焰图像

Figure 11. Flame image with the action of ultrafine water mist containing NaCl

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