降膜阵列脱除工业尾气PM2.5效率研究  

Study on Removal Efficiency of Industrial Exhaust PM2.5 by Falling Film Array

作　　者：李季[1] 郑志坚[1] 夏素兰[1] 李勇[1] 文浩[1] 

机构地区：[1]四川大学化学工程学院,成都610065

出　　处：《化工设计》2014年第5期3-4,8,共3页Chemical Engineering Design

基　　金：国家自然科学基金项目(21276161);科技部国际科技合作专项(2014DFG92250)

摘　　要：提出一种低压降、大通量、高效率降膜阵列式,利用废水废气交叉流界面脱除工业尾气中PM2.5技术。以含Al2O3粉末的气溶胶流体模拟工业尾气横掠20列×90排直径3mm的降膜阵列进行实验,结果表明降膜阵列脱除尾气PM2.5效率随降膜阵列传质面积增大而增大,随处理量的增大而降低。当体积流量为111.3m3/h,相应的尾气雷诺数为230时,传质面积为0.0942m2的单排降膜阵列脱除PM2.5的效率为0.794%,此工况下,传质面积为37.7m2的400排降膜阵列脱除PM2.5的理论效率可达95.8%。This paper presents a technology of low pressure drop,high flux and high efficiency falling film array to use the cross- flow interface of waste water of waste gas to remove PM2. 5 in industrial exhaust. The experiment uses the fluid of Al2O3 aerosol particles to simulate industrial exhaust across the falling film array of 20 lines × 90 rows and 3mm diameter.The results show that the PM2. 5 removal efficiency in exhaust by falling film array increases with the increase of falling film mass transfer area,and decreases with the increase of the processing amount. When the volume flow rate is 111. 3m3/h and the corresponding exhaust Reynolds number is 230,the PM2. 5 removal efficiency by the single-row falling film array with mass transfer area of 0. 0942m2 is 0. 794%. Under this condition,the theory PM2. 5 removal efficiency by 400-row array falling film array with mass transfer area of 37. 7m2 is up to 95. 8%.

关 键 词：PM2.5 降膜阵列 脱除效率 气液交叉流 

分 类 号：X701[环境科学与工程—环境工程]