蒙脱石粉体对瓦斯爆炸特性参数的影响研究
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摘要
选用天然矿物粉体蒙脱石作为抑爆材料,通过20 L球形爆炸装置和自主设计的5 L管道实验系统,测试了蒙脱石粉体及其浓度对甲烷-空气预混气体的爆炸压力、火焰传播速度等特性参数的影响.结果表明:蒙脱石粉体对甲烷爆炸具有一定的抑制作用,甲烷-空气预混气体的最大爆炸压力和爆炸火焰传播的平均速度随着粉体浓度的增加呈现先降低后上升的趋势.其中,当粉体浓度为0.16 g/L时,爆炸压力下降至最低,比未添加粉体时下降了29.2%;当粉体浓度为0.20 g/L时,火焰传播平均速度最小.此外,结合蒙脱石粉体的元素组成及热解特性分析其瓦斯抑爆机理.
With natural mineral montmorillonite powder as gas explosion inhibitor, the effect of the concentration of montmorillonite powder on the characteristic parameters of explosion pressure and the average velocity of flame propagation at 9.5% methane-air premixed gas were tested using the 20 L spherical explosion device and the 5 L pipeline experimental system. The results showed that montmorillonite powder displayed a good suppression effect on methane explosion, the max-pressure of methane explosion and the average velocity of flame propagation of 9.5% methane-air premixed gas decreased firstly and then increased with the increased concentration of montmorillonite powder. The max-pressure of methane explosion, decreasing by 29.2%, was the lowest when the mass concentration of montmorillonite powder was 0.16 g/L in the 20 L spherical explosive device; in the pipeline explosion suppression test system, when the mass concentration of montmorillonite powder was 0.20 g/L, the flame propagation velocity was the lowest. In addition, the mechanism of the inhibition methane explosion by montmorillonite powder was also discussed.
With natural mineral montmorillonite powder as gas explosion inhibitor, the effect of the concentration of montmorillonite powder on the characteristic parameters of explosion pressure and the average velocity of flame propagation at 9.5% methane-air premixed gas were tested using the 20 L spherical explosion device and the 5 L pipeline experimental system. The results showed that montmorillonite powder displayed a good suppression effect on methane explosion, the max-pressure of methane explosion and the average velocity of flame propagation of 9.5% methane-air premixed gas decreased firstly and then increased with the increased concentration of montmorillonite powder. The max-pressure of methane explosion, decreasing by 29.2%, was the lowest when the mass concentration of montmorillonite powder was 0.16 g/L in the 20 L spherical explosive device; in the pipeline explosion suppression test system, when the mass concentration of montmorillonite powder was 0.20 g/L, the flame propagation velocity was the lowest. In addition, the mechanism of the inhibition methane explosion by montmorillonite powder was also discussed.
引文
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[19]Kang Peng,Fu Liangjie,Ouyang Jing,et al.Emerging parallel dual 2D composites:natural clay mineral hybridizing MoS2 and interfacial structure[J].Advanced Functional Materials,2016,26(16):2666-2675.
[20]苗春省.X射线衍射快速划分膨润土类型的方法[J].矿物学报,1984(1):90-93. Miao Chunxing.The method of rapidly differentiating bentonite by X-ray diffraction[J].Acta Mineralogical Sinica,1984(1):90-93.(in Chinese)
[21]章庆和.膨润土差热曲线与物理化学性质的关系[J].矿物学报,1989,9(2):177-180. Zhang Qinghe.A study on the relationship between dta curves and physico-chemical properties of bentonite[J].Acta Mineralogical Sinica,1989,9(2):177-180.(in Chinese)
[22]Krasnyansky M.Studies of fundamental physical-chemical mechanisms and processes of flame extinguishing by powder aerosols[J].Fire and Mater,2008,32:27-47.
[23]Ni Xiaomin,Chow W K.Experimental study of new gas-solid composite particles in extinguishing cooking oil fires[J].Journal of Fire Sciences,2010,29:152-176.
[2]邢晓江,范宝春,杨宏伟.管内粉尘抑爆效果的实验研究[J].弹道学报,2000,12(4):72-76. Xing Xiaojiang,Fan Baochun,Yang Hongwei.The experiment research on explosion suppression of fine powder in tube[J].Journal of Ballistics,2000,12(4):72-76.(in Chinese)
[3]Luo Zhenmin,Wang Tao,Tian Zhihui,et al.Experimental study on the suppression of gas explosion using the gas-solid suppressant of CO2/ABC powder[J].Journal of Loss Prevention in the Process Industries,2014,30:17-23.
[4]Krasnyansky M.Prevention and suppression of explosions in gas-air and dust-air mixtures using powder aerosol-inhibitor[J].Journal of Loss Prevention in the Process Industries,2006,19:729-735.
[5]Boeck L R,Kink A,Oezdin D,et al.Influence of water mist on flame acceleration,DDT and detonation in H2-air mixtures[J].International Journal of Hydrogen Energy,2015,40:6995-7004.
[6]陈晓坤,林滢,罗振敏,等.水系抑制剂控制瓦斯爆炸的实验研究[J].煤炭学报,2006,31(5):603-606. Chen Xiaokun,Lin Ying,Luo Zhenmin,et al.Experiment study on controlling gas explosion by water-depressant[J].Journal of China Coal Society,2006,31(5):603-606.(in Chinese)
[7]Zeng Wen,Ma Hongan,Liang Yuntao,et al.Experimental and modeling study on effects of N2 and CO2 on ignition characteristics of methane/air mixture[J].Journal of Advanced Research,2015,6:189-201.
[8]黄寅生,戴晓静,曹卫国.磷酸二氢盐与SiO2粉体抑制煤尘爆炸的试验研究[J].中国安全科学学报,2013,23(3):57-61. Hang Yinsheng,Dai Xiaojing,Cao Weiguo.Experimental study on coal dust explosion suppression with dihydrogen phosphate salts and SiO2 powders[J].China Safety Science Journal,2013,23(3):57-61.(in Chinese)
[9]伍毅,袁旌杰,蒯念生,等.碳酸盐对密闭空间粉尘爆炸压力影响的试验研究[J].中国安全科学学报,2010,20(10):92-96. Wu Yi,Yuan Jingjie,Kuai Niansheng,et al.Effects of carbonates on dust explosion pressure in closed vessel[J].China Safety Science Journal,2010,20(10):92-96.(in Chinese)
[10]张跃,张景林,张包民,等.ABC和BC干粉抑制92号汽油蒸气-空气混合物爆炸效果研究[J].中国安全科学学报,2013,23(8):53-58. Zhang Yue,Zhang Jinglin,Zhang Baomin,et al.A study on explosion suppression effect of No.92 gasoline vapor-air mixture using ABC and BC dry powders[J].China Safety Science Journal,2013,23(8):53-58.(in Chinese)
[11]余明高,王天政,游浩.粉体材料热特性对瓦斯抑爆效果影响的研究[J].煤炭学报,2012,37(5):830-835. Yun Minggao,Wang Tianzheng,You Hao,et al.Study on gas explosion suppression influence of thermal properties of powder[J].Journal of China Coal Society,2012,37(5):830-835.(in Chinese)
[12]文虎,王秋红,邓军,等.超细Al(OH)3粉体浓度对甲烷爆炸压力的影响[J].煤炭学报,2009,34(11):1479-1482. Wen Hu,Wang Qiuhong,Deng Jun,et al.Effect of the concentration of Al(OH)3 ultrafine powder on the pressure of methane explosion[J].Journal of China Coal Society,2009,34(11):1479-1482.(in Chinese)
[13]王燕,程义伸,曹建亮,等.核-壳型KHCO3/赤泥复合粉体的甲烷抑爆特性[J].煤炭学报,2017,42(3):653-658. Wang Yan,Cheng Yishen,Cao Jianliang,et al.Suppression characteristics of KHCO3/red-mud composite powders with core-shell structure on methane explosion[J].Journal of China Coal Society,2017,42(3):653-658.(in Chinese)
[14]Wang Yan,Cheng Yishen,Yu Minggao,et al.Methane explosion suppression characteristics based on the NaHCO3/red-mud composite powders with core-shell structure[J].Journal of Hazardous Materials,2017,335:84-91.
[15]余明高,孔杰,王燕,等.改性赤泥粉体抑制瓦斯爆炸的实验研究[J].煤炭学报,2014,39(7):1289-1295. Yu Minggao,Kong Jie,Wang Yan,et al.Experimental research on gas explosion suppression by modified red mud[J].Journal of China Coal Society,2014,39(7):1289-1295.(in Chinese)
[16]Koshiba Y,Okazaki S,Ohtani H.Experimental investigation of the fire extinguishing capability of ferrocene-containing water mist[J].Fire Safety Journal,2016,83:90-98.
[17]Luo Zhenmin,Cheng Fangming,Wang Tao,et al.Suppressive effects of silicon dioxide and diatomite powder aerosols on coal mine gas explosions in highlands[J].Aerosol&Air Quality Research,2016,16:2119-2128.
[18]杨柳燕.有机蒙脱土和微生物联合处理有机污染物的机理与应用[M].北京:中国环境科学出版社,2004. Yang Liuyan.Study on mechanism and application of combined treatment organic contaminants using organic montmorillonite and microorganism[M].Beijing:China Environmental Science Press,2004.(in Chinese)
[19]Kang Peng,Fu Liangjie,Ouyang Jing,et al.Emerging parallel dual 2D composites:natural clay mineral hybridizing MoS2 and interfacial structure[J].Advanced Functional Materials,2016,26(16):2666-2675.
[20]苗春省.X射线衍射快速划分膨润土类型的方法[J].矿物学报,1984(1):90-93. Miao Chunxing.The method of rapidly differentiating bentonite by X-ray diffraction[J].Acta Mineralogical Sinica,1984(1):90-93.(in Chinese)
[21]章庆和.膨润土差热曲线与物理化学性质的关系[J].矿物学报,1989,9(2):177-180. Zhang Qinghe.A study on the relationship between dta curves and physico-chemical properties of bentonite[J].Acta Mineralogical Sinica,1989,9(2):177-180.(in Chinese)
[22]Krasnyansky M.Studies of fundamental physical-chemical mechanisms and processes of flame extinguishing by powder aerosols[J].Fire and Mater,2008,32:27-47.
[23]Ni Xiaomin,Chow W K.Experimental study of new gas-solid composite particles in extinguishing cooking oil fires[J].Journal of Fire Sciences,2010,29:152-176.
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