含菌-无机盐超细水雾抑制甲烷爆炸试验研究
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摘要
为进一步提高超细水雾抑制甲烷爆炸的效率,搭建抑制甲烷爆炸试验平台,开展用含甲烷氧化菌-无机盐超细水雾降解与抑爆甲烷的试验研究,考虑降解时间、第1次通雾量、第2次通雾量等3个因素进行正交试验,分析不同试验条件下甲烷爆炸压力和火焰传播过程。结果表明:改性培养基中的甲烷氧化菌降解甲烷效果优于普通培养基;降解时间对甲烷最大爆炸超压ΔP_(max)有显著影响,第2次通雾量对甲烷最大爆炸超压ΔP_(max)有一定影响;降解时间对火焰平均传播速度有显著影响,第2次通雾量对火焰平均传播速度有一定影响;同时增加降解时间和第2次通雾量可以降低平均升压速率和火焰平均传播速度。
To further improve the suppression efficiency of ultra-fine water mist on methane explosion, methane-air explosion inhibition experiments were carried out by using a experiment platform. In the experiments, ultra-fine water mists containing methane-oxidizing bacteria-inorganic salts were used as the inhibitors. Three factors including the degradation time, the first spraying volume and secondary spraying volume were taken into consideration, and orthogonal experiments were carried out. The methane explosion pressure and flame propagation process under different experiment conditions were analyzed. The experimental results show that the effect of methane-oxidizing bacteria degradating methane in the modified medium is better than that in the normal medium;the degradation time has a significant influence on the maximum explosion overpressure ΔP_(max) of methane-air mixture, the secondary spraying volume has a certain influence on the maximum explosion overpressure ΔP_(max) of methane-air mixture. The degradation time has a significant influence on the average flame propagation speed,the secondary spraying volume has a certain influence on the average flame propagation speed. Simultaneous increasing both the degradation time and the secondary spraying volume can reduce both the average pressure increasing rate and the average flame propagation speed.
To further improve the suppression efficiency of ultra-fine water mist on methane explosion, methane-air explosion inhibition experiments were carried out by using a experiment platform. In the experiments, ultra-fine water mists containing methane-oxidizing bacteria-inorganic salts were used as the inhibitors. Three factors including the degradation time, the first spraying volume and secondary spraying volume were taken into consideration, and orthogonal experiments were carried out. The methane explosion pressure and flame propagation process under different experiment conditions were analyzed. The experimental results show that the effect of methane-oxidizing bacteria degradating methane in the modified medium is better than that in the normal medium;the degradation time has a significant influence on the maximum explosion overpressure ΔP_(max) of methane-air mixture, the secondary spraying volume has a certain influence on the maximum explosion overpressure ΔP_(max) of methane-air mixture. The degradation time has a significant influence on the average flame propagation speed,the secondary spraying volume has a certain influence on the average flame propagation speed. Simultaneous increasing both the degradation time and the secondary spraying volume can reduce both the average pressure increasing rate and the average flame propagation speed.
引文
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[13] 林滢,李孝斌,宋久壮. 超细水雾抑制瓦斯爆炸的可行性研究[J]. 矿业安全与环保,2006,33(4): 15-17.LIN Ying, LI Xiaobin, SONG Jiuzhuang. Feasibility study on ultra-fine water mist suppressing gas explosion[J]. Mining Safety and Environmental Protection, 2006,33 (4): 15-17.
[2] 毕明树,郑秋红,唐皓,等. 细水雾对障碍物遮挡火源抑制作用的数值研究[J]. 中国安全科学学报,2010,20(10): 72-75.BI Mingshu, ZHENG Qiuhong, TANG Hao, et al. Numerical study on the inhibition effect of water mist on obstacles[J]. China Safety Science Journal, 2010,20(10): 72-75.
[3] 余明高,李喜玲,马科世,等. 含添加剂细水雾熄灭油池火的机理及实验[J]. 河南理工大学学报:自然科学版,2006,25(6): 433-437.YU Minggao, LI Xiling, MA Keshi, et al. Mechanism and experiment of extinguishing oil pool fire with additive water mist[J]. Journal of Henan Polytechnic University: Science and Technology, 2006,25(6): 433-437.
[4] CAO Xingyan, REN Jingjie, BI Mingshu, et al. Experimental research on mechane/air explosion inhibition using ultrafine water mist containing additive[J]. Journal of loss prevention in the process industries, 2016,43: 352-360.
[5] LAZZARINI A K, KRAUSS R H, CHELLIAH H K, et al. Extinction conditions of non-premixed flames with fine droplets of water and water/NaOH solutions[J]. Proceedings of the Combustion Institute, 2000,28(2): 2 939-2 945.
[6] CHELLIAN H K, WANIGARATHNE P C, LENTATI A M, et al. Effect of sodium bicarbonate particle size on the extinction condition of non-premixed counterflow flames[J]. Combustion & Flame, 2003,134(3): 261-272.
[7] 刘江虹,廖光煊. 含添加剂细水雾熄灭甲烷/空气火焰的研究[J]. 北京理工大学学报,2010,30(10): 1 240-1 244.LIU Jianghong, LIAO Guangxuan. Study on extinguishing methane/air flame with additive water mist[J]. Journal of Beijing Institute of Technology, 2010,30(10): 1 240-1 244.
[8] 余明高,安安,赵万里,等. 含添加剂细水雾抑制瓦斯爆炸有效性试验研究[J]. 安全与环境学报,,2011, 11(4): 149-153.YU Minggao, AN An, ZHAO Wanli, et al. Experimental study on effectiveness of water mist containing additive to suppress gas explosion[J]. Journal of Safety and Environment, 2011, 11(4): 149-153.
[9] 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): 4 461-4 468. 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]. Journal of Chemical Industry and Engineering, 2017,68(11): 4 461-4 468.
[10] 杨克,张平,纪虹,等. 有毒气体对含菌超细水雾降解与抑制甲烷爆炸的影响研究[J]. 常州大学学报:自然科学版,2018,30(1): 28-34.YANG Ke, ZHANG Ping, JI Hong, et al. Study on the effect of toxic gases on the degradation of bacteria-containing ultra-fine water mist and the inhibition of methane explosion[J]. Journal of Changzhou University: Science and Technology, 2018,30(1): 28-34.
[11] 杨克,纪虹,赵旭,等. 含菌超细水雾抑制甲烷爆炸的实验研究[J]. 消防科学与技术,2016,35(6): 806-809.YANG Ke, JI Hong, ZHAO Xu, et al. Experimental study on inhibition of methane explosion by ultra-fine water mist containing bacteria[J]. Fire Science and Technology, 2016, 35(6): 806-809.
[12] 王明义,梁小兵,AHN T S,等. 阿哈湖深层水中微生物和硫酸还原菌数量及群落结构空间变化[J]. 生态学杂志,2007,26(11): 1 898-1 900.WANG Mingyi, LIANG Xiaobing, AHN T S, et al. Spatial and community changes of microbes and sulfate-reducing bacteria in deep water of Aha lake[J]. Journal of Ecology, 2007,26(11): 1 898-1 900.
[13] 林滢,李孝斌,宋久壮. 超细水雾抑制瓦斯爆炸的可行性研究[J]. 矿业安全与环保,2006,33(4): 15-17.LIN Ying, LI Xiaobin, SONG Jiuzhuang. Feasibility study on ultra-fine water mist suppressing gas explosion[J]. Mining Safety and Environmental Protection, 2006,33 (4): 15-17.
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