Influence study on inhibitory effect of porous materials on LPG explosion in vent pipe

doi:10.16265/j.cnki.issn1003-3033.2024.06.1139

Abstract

Abstract:

In order to investigate the influence of porous materials on the explosion propagation characteristics of LPG in vent pipes, experiments were conducted on a self-built gas explosion test platform. The inhibitory effect of silicon carbide materials with different thicknesses and porosities on the flame propagation characteristics and explosion overpressure in the vent pipe was investigated. The results show that porous materials can effectively prevent the propagation of LPG explosion flame. With the increase of porosity and thickness, the propagation distance, propagation speed and intensity of LPG flame are reduced, and the porosity has a greater effect on the fire resistance than the thickness. The installation of porous materials also reduces the maximum explosion overpressure. When LPG is not ignited behind the installation location, increasing the porosity and thickness of porous materials, the maximum explosion overpressure in front of the material (PT1, PT2) increases, and that behind the material (PT3) is close to the static film-breaking pressure. The firestopping effect of material porosity and thickness shows that increasing the porosity of the material for firestopping should be prioritized when the strength of the material is up to standard in engineering applications.

Key words: porous materials, vent pipe, liquefied petroleum gas (LPG), inhibiting effect, explosion overpressure

CLC Number:

X932爆炸安全与防火、防爆

GUAN Wenling, HOU Yifei, REN Changxing, DONG Chengjie, ZHANG Wang. Influence study on inhibitory effect of porous materials on LPG explosion in vent pipe[J]. China Safety Science Journal, 2024, 34(6): 82-89.

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References 27

[1]	大连坤马燃气有限公司“9·10”较大管道液化石油气泄漏爆炸事故调查报告[EB/OL]. (2021-10-18). https://yjgl.ln.gov.cn/uiFramework/js/pdfjs/web/viewer.html?file=/eportal/fileDir/data/lnsafetyweb/P020220607592681808672.pdf.
[2]	中共中央国务院关于全面推进乡村振兴加快农业农村现代化的意见[EB/OL].(2021-01-04). https://www.gov.cn/gongbao/content/2021/content_5591401.htm.
[3]	仝晓波, 李玲. 燃气下乡重在因地制宜[N]. 中国能源报,2021-03-01(013).
[4]	曾瑜, 陈司达, 加永边巴. 高原液化石油气管道的腐蚀现状与防护[J]. 中国特种设备安全, 2023, 39(增2):90-92.
	ZENG Yu, CHEN Sida,, JIAYONG Bianba. Corrosion status and its anticorrosion of plateau liquefied petroleum pipeline[J]. China Special Equipment Safety, 2023, 39(S2):90-92.
[5]	王辉. 液化石油气输运管道泄漏扩散及其危险性研究[D]. 天津: 河北工业大学, 2023.
	WANG Hui. Study on leakage diffusion and risk of LPG transportation pipeline[D]. Tianjin: Hebei University of Technology, 2023.
[6]	ADIGA K C, WILLAUER H D, ANANTH R, et al. Implications of droplet breakup and formation of ultra fine mist in blast mitigation[J]. Fire Safety Journal, 2009, 44(3):363-369.
[7]	CHEN Zhihua, FAN Baochun, JIANG Xiaohai. Suppression effects of powder suppressants on the explosions of oxyhydrogen gas[J]. Journal of Loss Prevention in the Process Industries, 2006, 19(6):648-655.
[8]	FERRARA G, WILLACY S K, PHYLAKTOU H N, et al. Venting of gas explosion through relief ducts: interaction between internal and external explosions[J]. Journal of Hazardous Materials, 2008, 155(1/2):358-368.
[9]	丁清泉, 袁必和, 陈先锋, 等. PVDF球形多孔材料的抑爆性能研究[J]. 中国安全科学学报, 2023, 33(1):177-182. doi: 10.16265/j.cnki.issn1003-3033.2023.01.0437
	DING Qingquan, YUAN Bihe, CHEN Xianfeng, et al. Study on explosion suppression performance of PVDF spherical porous material[J]. China Safety Science Journal, 2023, 33(1):177-182. doi: 10.16265/j.cnki.issn1003-3033.2023.01.0437
[10]	WANG Zhirong, NI Lei, LIU Xinyong, et al. Effects of N₂/CO₂ on explosion characteristics of methane and air mixture[J]. Journal of Loss Prevention in the Process Industries, 2014, 31:10-15.
[11]	TANG Zesi, LI Jialin, GUO Jin, et al. Effect of vent size on explosion overpressure and flame behavior during vented hydrogen/air mixture deflagrations[J]. Nuclear Engineering and Design, 2020, 361: DOI: 10.1016/j.nucengdes.2020.110578.
[12]	ALEXIOU A, ANDREWS G E, PHYLAKTOU H. Side-vented gas explosions in a long vessel: the effect of vent position[J]. Journal of Loss Prevention in the Process Industries, 1996, 9(5):351-356.
[13]	QIU Yanyu, XING Huadao, SUN Song, et al. Experimental study of the effects of vent area and ignition position on internal and external pressure characteristics of venting explosion[J]. Fuel, 2021, 300: DOI: 10.1016/j.fuel.2021.120935.
[14]	SUN Song, QIU Yanyu, XING Huadao, et al. Effects of concentration and initial turbulence on the vented explosion characteristics of methane-air mixtures[J]. Fuel, 2020, 267: DOI: 10.1016/j.fuel.2020.117103.
[15]	NIE Baisheng, HE Xueqiu, ZHANG Ruming, et al. The roles of foam ceramics in suppression of gas explosion overpressure and quenching of flame propagation[J]. Journal of Hazardous Materials, 2011, 192(2):741-747. doi: 10.1016/j.jhazmat.2011.05.083 pmid: 21704454
[16]	孙建华, 李艳霞, 魏春荣, 等. 泡沫铁镍金属抑制瓦斯爆炸冲击波的实验研究[J]. 功能材料, 2013, 44(10):1390-1394.
	SUN Jianhua, LI Yanxia, WEI Chunrong, et al. Experimental study on the porous foam iron-nickel metal inhibition of gas explosion wave[J]. Journal of Functional Materials, 2013, 44(10):1390-1394.
[17]	CHEN Peng, HUANG Fujun, SUN Yongduo, et al. Effects of metal foam meshes on premixed methane-air flame propagation in the closed duct[J]. Journal of Loss Prevention in the Process Industries, 2017, 47:22-28.
[18]	ZHUANG Chunji, WANG Zhirong, ZHANG Kai, et al. Explosion suppression of porous materials in a pipe-connected spherical vessel[J]. Journal of Loss Prevention in the Process Industries, 2020, 65: DOI: 10.1016/j.jlp.2020.104106.
[19]	DUAN Yulong, WANG Shuo, YANG Yanling, et al. Experimental study on methane explosion characteristics with different types of porous media[J]. Journal of Loss Prevention in the Process Industries, 2021, 69: DOI: 10.1016/j.jlp.2020.104370.
[20]	邵继伟, 庄春吉, 王志荣, 等. 组合型多孔材料对容器管道系统内甲烷/空气的抑爆效果[J]. 爆炸与冲击, 2018, 38(4):905-912.
	SHAO Jiwei, ZHUANG Chunji, WANG Zhirong, et al. Explosion suppression effect of CH₄/air by combined porous materials in a container piping system[J]. Explosion and Shock Waves, 2018, 38(4):905-912.
[21]	袁必和, 张玉铎, 员亚龙, 等. 多孔聚丙烯复合材料的抑爆性能研究[J]. 中国安全科学学报, 2021, 31(8):91-96. doi: 10.16265/j.cnki.issn1003-3033.2021.08.013
	YUAN Bihe, ZHANG Yuduo, YUN Yalong, et al. Study on explosion suppression performance of porous polypropylene[J]. China Safety Science Journal, 2021, 31(8):91-96. doi: 10.16265/j.cnki.issn1003-3033.2021.08.013
[22]	WANG Qiao, LUO Xinjiao, LI Quan, et al. Explosion venting of hydrogen-air mixture in an obstructed rectangular tube[J]. Fuel, 2022, 310: DOI: 10.1016/j.fuel.2021.122473.
[23]	NFPA-2023, Standard on explosion protection by deflagration venting[S].
[24]	GONG Haofeng, GUAN Wenling, WANG Xiaoli, et al. Experimental study of the suppression effect of N₂/CO₂ on the LPG explosion behavior in a half-open duct with large aspect ratios[J]. Combustion Science and Technology, 2022: DOI: 10.1080/00102202.2022.2158735.
[25]	NIE Baisheng, YANG Longlong, WANG Jingwei. Experiments and mechanisms of gas explosion suppression with foam ceramics[J]. Combustion science and technology, 2016, 188(11/12):2117-2127.
[26]	LU Yawei, WANG Zhirong, CAO Xingyan, et al. Interaction mechanism of wire mesh inhibition and ducted venting on methane explosion[J]. Fuel, 2021, 304: DOI: 10.1016/j.fuel.2021.121343.
[27]	GUO Jin, WANG Xuebiao, ZHANG Kai, et al. Effects of nitrogen addition on vented hydrogen:air deflagration in a vertical duct[J]. International Journal of Hydrogen Energy, 2021, 46(50):25 763-25 770.

孔隙度/ PPI	平均孔径/mm	最大孔径/mm	最小孔径/mm	上偏差	下偏差
10	2.54	3.18	2.12	0.64	-0.42
15	1.69	1.95	1.49	0.26	-0.2
20	1.27	1.41	1.15	0.14	-0.12

厚度/mm	孔隙度/PPI
厚度/mm	10	15	20
15	×	Δ	Δ
20	Δ	Δ	√
30	Δ	Δ	√