含NaCl超细水雾抑制甲烷爆炸实验研究
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摘要
为研究含NaCl添加剂超细水雾对甲烷爆炸的影响,在自制的半封闭透明管道内,进行含NaCl添加剂超细水雾抑制甲烷爆炸试验,通过检测和分析在不同NaCl浓度情况下超细水雾的粒径和甲烷爆炸的平均火焰传播速度、爆炸超压以及平均升压速率,探究NaCl浓度对超细水雾粒径及其对抑制甲烷爆炸有效性的影响。研究结果表明:NaCl浓度对超细水雾粒径影响较小;对于体积分数为9.5%的甲烷,相比于纯甲烷爆炸,其平均火焰传播速率、最大爆炸超压以及平均升压速率分别下降了53.7%,63.4%和60.7%,相比于超细纯水雾,其平均火焰传播速率、最大爆炸超压以及平均升压速率分别下降了38.6%,58%,56%;在通雾量相同的条件下,浓度为2.5%NaCl超细水雾对体积分数为9.5%的甲烷爆炸抑制性能最佳;含NaCl添加剂超细水雾的物理化学共同作用可以有效抑爆甲烷。
In order to investigate the influence of ultrafine water mist containing NaCl additive on methane explosion,a methane explosion suppression experiment with ultra-fine water mist containing NaCl additive is carried out in a self-made semiclosed transparent chamber to detect and analyze the particle size of ultrafine water mist and average flame propagation velocity,explosion overpressure,average pressure rise rate of methane explosion under different concentration of NaCl additive,explore the influence of NaCl additive concentration on ultrafine water mist particle size and its effectiveness in suppressing methane explosion. The results show that the NaCl additive concentration has little effect on the particle size of ultrafine water mist. For methane with a volume fraction of 9. 5%,2. 5% NaCl additive concentration shows the most significant explosion suppression performance under the same spraying time. Compared with the no spraying condition,the average flame propagation velocity,maximum explosion overpressure and the average pressure rise rate decreased by 53. 7%,63. 4%,and 60. 7%,respectively; compared with pure water ultrafine water mist suppressing the explosion,those parameters decreased by 38. 6%,58%,and 56%,respectively; the combination of physical and chemical properties of ultra-fine water mist containing NaCl additive can effectively suppress methane.
In order to investigate the influence of ultrafine water mist containing NaCl additive on methane explosion,a methane explosion suppression experiment with ultra-fine water mist containing NaCl additive is carried out in a self-made semiclosed transparent chamber to detect and analyze the particle size of ultrafine water mist and average flame propagation velocity,explosion overpressure,average pressure rise rate of methane explosion under different concentration of NaCl additive,explore the influence of NaCl additive concentration on ultrafine water mist particle size and its effectiveness in suppressing methane explosion. The results show that the NaCl additive concentration has little effect on the particle size of ultrafine water mist. For methane with a volume fraction of 9. 5%,2. 5% NaCl additive concentration shows the most significant explosion suppression performance under the same spraying time. Compared with the no spraying condition,the average flame propagation velocity,maximum explosion overpressure and the average pressure rise rate decreased by 53. 7%,63. 4%,and 60. 7%,respectively; compared with pure water ultrafine water mist suppressing the explosion,those parameters decreased by 38. 6%,58%,and 56%,respectively; the combination of physical and chemical properties of ultra-fine water mist containing NaCl additive can effectively suppress methane.
引文
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[13]罗振敏,康凯,任军莹.NH3对甲烷链式爆炸的微观作用机理[J].煤炭学报,2016,41(4):876-883.LUO Zhenmin,KANG Kai,REN Junying.Microscopic mechanism of NH3on methane chain explosion[J].Journal of China Coal Society,2016,41(4):876-883.
[14]余明高,朱新娜,裴蓓,等.二氧化碳-超细水雾抑制甲烷爆炸实验研究[J].煤炭学报,2015,40(12):2843-2848.YU Minggao,ZHU Xinna,PEI Bei,et al.Experimentalstudy on methane explosion suppression using carbon dioxide and ultra-fine water mist[J].Journal of China Coal Society,2015,40(12):2843-2848.
[15]WU Binbin,LIAO Guangxuan.Experimental study on fire extinguishing of water mist with a newly prepared multi-component additive[J].Procedia Engineering,2013,62:317-323.
[16]ZHANG T W,HAN Z Y,DU Z M.Application of thermal mechanism to evaluate the effectiveness of the extinguishment of CH4/air cup-burner flame by water mist with additives[J].International Journal of Hydrogen Energy,2016,41(33):15078-15088.
[2]史文芳,张爱绒,郭勇义,等.超细水雾抑制煤燃烧的模拟实验研究[J].中国安全生产科学技术,2013,9(2):49-53.SHI Wenfang,ZHANG Airong,GUO Yongyi,et al.Simulation experiment study on ultrafine water mist suppressing coal combustion[J].Journal of Safety Science and Technology,2013,9(2):49-53.
[3]ZHANG P P,ZHOU Y H,CAO X Y,et al.Mitigation of methane/air explosion in a closed vessel by ultrafine water fog[J].Safety Science,2014,62(56):1-7.
[4]CAO X Y,REN J J,BI M S,et al.Experimental research on methane/air explosion inhibition using ultrafine water mist containing additive[J].Journal of Loss Prevention in the Process Industries,2016,43:352-360.
[5]CAO X Y,REN J J,ZHOU Y H,et al.Suppression of methane/air explosion by ultrafine water mist containing sodium chloride additive[J].Journal of Hazardous Materials,2015,285:311-318.
[6]JOSEPH P,NICHOLS E,NOVOZHILOV,et al.A comparative study of the effects of chemical additives on the suppression efficiency of water mist[J].Fire Safety Journal,2013,58:221-225.
[7]ZHANG T W,DU Z M,HAN Z Y,et al.Performance evaluation of water mist with additives in suppressing cooking oil fires based on temperature analysis[J].Applied Thermal Engineering,2016,102:1069-1074.
[8]YU M G,WAN S J,XU Y L,et al.Suppressing methane explosion overpressure using a charged water mist containing a Na Cl additive[J].Journal of Natural Gas Science and Engineering,2016,29:21-29.
[9]余明高,吴丽洁,万少杰,等.含Na Cl荷电细水雾对甲烷爆炸火焰传播的抑制特性[J].化工学报,2017,68(11):4445-4452.YU Minggao,WU Lijie,WAN Shaojie,et al.Inhibition characteristics on methane explosion flame propagation affected by charged water mist containing sodium chloride additive[J].CIESC Journal,2017,68(11):4445-4452.
[10]刘江虹,丛北华.含添加剂细水雾临界灭火浓度的实验研究[J].中国矿业大学学报,2011,40(1):116-119.LIU Jianghong,CONG Beihua.Experimental study on critical fire extinguishing concentration of water mist containing additives[J].Journal of China University of Mining&Technology,2011,40(1):116-119.
[11]许红利,倪小敏,李权威,等.添加剂对细水雾高原灭火性能影响的试验研究[J].中国安全科学学报,2015,25(11):58-63.XU Hongli,NI Xiaomin,LI Quanwei,et al.Experimental study on the effect of additives on fire performance of water mist plateau[J].China Safety Science Journal,2015,25(11):58-63.
[12]纪虹,杨克,黄维秋,等.超细水雾协同甲烷氧化菌降解与抑制甲烷爆炸的实验研究[J].化工学报,2017,68(11):4461-4468.JI Hong,YANG Ke,HUANG Weiqiu,et al.Experimental study on degradation of ultra-fine water mist and methane oxidizing bacteria and inhibition of methane explosion[J].CIESC Journal,2017,68(11):4461-4468.
[13]罗振敏,康凯,任军莹.NH3对甲烷链式爆炸的微观作用机理[J].煤炭学报,2016,41(4):876-883.LUO Zhenmin,KANG Kai,REN Junying.Microscopic mechanism of NH3on methane chain explosion[J].Journal of China Coal Society,2016,41(4):876-883.
[14]余明高,朱新娜,裴蓓,等.二氧化碳-超细水雾抑制甲烷爆炸实验研究[J].煤炭学报,2015,40(12):2843-2848.YU Minggao,ZHU Xinna,PEI Bei,et al.Experimentalstudy on methane explosion suppression using carbon dioxide and ultra-fine water mist[J].Journal of China Coal Society,2015,40(12):2843-2848.
[15]WU Binbin,LIAO Guangxuan.Experimental study on fire extinguishing of water mist with a newly prepared multi-component additive[J].Procedia Engineering,2013,62:317-323.
[16]ZHANG T W,HAN Z Y,DU Z M.Application of thermal mechanism to evaluate the effectiveness of the extinguishment of CH4/air cup-burner flame by water mist with additives[J].International Journal of Hydrogen Energy,2016,41(33):15078-15088.