湍球塔吸收低浓度尾气NH_3的传质系数研究  

Research on Mass Transfer Coefficient of Low Concentration NH_3 Flue Gas Absorption in Turbulent Contact Absorber

作　　者：王文辉[1] 豆瑞刚 夏素兰[1] 张趁华[1] 程远贵[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3期43-46,2,共4页Chemical Engineering Design

基　　金：国家科技支撑计划课题(2013BAC12B01)

摘　　要：脱除尾气低浓度氨是氨法烟气碳减排不可缺少的环节。采用湍球塔(TCA)进行实验研究,测定总体积传质系数(Kga),考查化学吸收和流化数等因素的影响。结果表明:化学吸收比物理吸收Kga增大63%。随流化数增大成比例增大,但流化数不能过大,否则会因气体在塔内停留时间太短而降低脱除效率。Removal of low concentration ammonia flue gas is an indispensable part in carbon dioxide flue gas emissions by ammonia process. In this paper,the TCA(turbulent contact absorber) is used in experimental study to determine the total volume mass transfer coefficient(Kga), and researches the effect of chemical absorption and fluidization number. The experimental results show that the overall mass transfer coefficient in chemical absorption is 63% larger than that in physical absorption. The overall mass transfer coefficient is increased with the fluidization number proportionally. However,the fluidization number cannot be too large,otherwise it would make the short gas residence time in the tower,reducing the removal efficiency.

关 键 词：传质系数 湍球塔 低浓度NH3 尾气 化学吸收 

分 类 号：TQ021.4[化学工程]