基于SLAB的重气泄漏扩散模拟分析  

Analysis on the Leakage and Dispersion of Heavy Gas Based on SLAB

作　　者：何娟霞 刘磊 周琪勇 李昂昂 马野 周冬梅 HE Juan-xia;LIU Lei;ZHOU Qi-yong;LI Ang-ang;MA Ye;ZHOU Dong-mei(School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China;School of Materials Science and Engineering,South China University of Technology,Guangzhou 510641,China)

机构地区：[1]广西大学资源环境与材料学院,南宁530004 [2]华南理工大学材料科学与工程学院,广州510641

出　　处：《科学技术与工程》2020年第17期7108-7113,共6页Science Technology and Engineering

基　　金：广西科技厅重点研发计划(桂科AB16380288)。

摘　　要：简述重气云团及其扩散的相关理论,运用SLAB模型模拟某厂液氯钢瓶破裂瞬时泄漏后下风向浓度三维分布情况。得到近地处氯气泄漏扩散浓度分布曲线、敏感点浓度随时间变化曲线、浓度分布三维曲面。结果表明:厂内大部分浓度在300 mg/m 3以上,位于致死区域;下风向1500 m处敏感点暴露在50~60 mg/m 3浓度区间内的时间约为60 s;三维浓度曲面呈狭长的椭圆拱形,氯气浓度为58 mg/m 3的曲面高度可达43 m。以上结果可为事故应急救援提供有效参考。Theories of heavy gas and its diffusion were briefly introduced firstly.Then,SLAB model was used to simulate the downwind concentration distribution after the instantaneous leakage from liquid chlorine cylinder.Finally,the distribution map of concentration,the concentration-time curve in sensitive location and the three-dimensional concentration surface were obtained.The results show that most of the concentration in the factory is above 300 mg/m 3,and locates in the lethal area.The exposure time to 50 to 60 mg/m 3 is about 60 s in the downwind direction 1500 m.The three-dimensional concentration surface is a narrow elliptical arch,and the surface height of 58 mg/m 3 will rise up to 43 m.The research can provide effective references for emergency rescue.

关 键 词：SLAB模型 氯气泄漏 扩散 重气 模拟 

分 类 号：X511[环境科学与工程—环境工程]