细水雾-N_(2)协同抑制甲烷爆炸数值模拟研究  

Numerical Simulation of Synergistic Inhibition Effect of Water Mist-N_(2)on Methane Explosion

作　　者：秦朝 孟祥豹[1,2,3] 朱玉健 宋世泽民 QIN Zhao;MENG Xiangbao;ZHU Yujian;SONG Shizemin(College of Safety and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Qingdao Intelligent Control Engineering Center for Production Safety Fire Accident,Qingdao 266000,China;Institute of Public Safety,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学安全与环境工程学院,山东青岛266590 [2]青岛市生产安全火灾重大事故智能控制工程研究中心,山东青岛266000 [3]山东科技大学公共安全研究院,山东青岛266590

出　　处：《山东化工》2024年第24期217-221,225,共6页Shandong Chemical Industry

基　　金：国家自然科学基金项目(52074174)。

摘　　要：为了有效减缓甲烷爆炸事故发生时的危害性,建立二维封闭圆形管道模型,通过数值模拟的手段研究细水雾-N_(2)对甲烷爆炸的协同抑制效果。在本研究中,细水雾质量-N_(2)协同抑爆效果随着细水雾和N_(2)浓度增加而逐渐增强,但在抑爆效果方面并不完全遵循线性关系。细水雾质量浓度为0.35 kg/m^(3)且N_(2)质量分数为16%时,对甲烷的协同抑爆效果最佳,爆炸最大超压为0.125 MPa,与单独加入质量分数16%N_(2)和0.5 kg/m^(3)细水雾相比,对最大超压的抑制效果分别提升了134%和22%。细水雾-N_(2)协同抑爆是通过水雾吸收热量,降低CH4氧化反应速率,以及稀释反应物的浓度,降低自由基和链式反应链数目两方面共同进行的。研究的结果可以为甲烷爆炸的防范与抑制工作提供参考。In order to effectively alleviate the hazard of methane explosion accidents,a two-dimensional closed circular pipeline model is established to study the synergistic inhibition effect of water mist-N_(2)on methane explosion by means of numerical simulation.In this study,the synergistic explosion suppression effect gradually increased with the increase of water mist and N_(2)concentration,but the explosion suppression effect of the two did not follow exactly a linear relationship.When the concentration of water mist is 0.35 kg/m^(3)and the concentration of N_(2)is 16%,the synergistic explosion suppression effect of methane is the best,and the maximum explosion overpressure is 0.125 MPa,which is 134%and 22%higher than that of 16%N_(2)and 0.5 kg/m^(3)water mist alone.The water mist-N_(2)synergistic explosion suppression is carried out by absorbing heat by water mist,reducing the rate of CH 4 oxidation reaction,diluting the concentration of reactants,reducing free radicals and the number of chain reaction chains.The results of this study can provide a reference for the prevention and suppression of methane explosion.

关 键 词：细水雾-N_(2) 协同抑爆 数值模拟 抑制机理 

分 类 号：TQ086[化学工程] X932[环境科学与工程—安全科学]