垃圾与煤混烧烟气脱酸的模拟及实验  

Numerical simulation and experimental on deacidification of flue gas by co-combustion of MSW with coal

作　　者：臧仁德[1,2] 张力[1,2] 

机构地区：[1]低品位能源利用技术及系统教育部重点实验室(重庆大学),重庆400030 [2]重庆大学动力工程学院,重庆400030

出　　处：《煤炭学报》2011年第8期1385-1390,共6页Journal of China Coal Society

基　　金：重庆市自然科学基金重点资助项目(CSTC2009BA6067)

摘　　要：通过在喷雾干燥塔内加装均流装置优化垃圾与煤混烧的烟气净化塔结构,利用Fluent软件包,对加装均流装置的喷雾干燥塔的烟气脱酸过程进行数值模拟。结果表明:塔内烟气充满度更高,流场得到优化;垃圾与煤混烧比增大时,SO2浓度减小,HCl浓度增加;SO2、HCl的净化效率随均流装置开孔区域直径的增加而增加、随化学计量比的增加而增加,HCl的净化效率随化学计量比增加的趋势不如SO2明显;SO2、HCl的净化效率随着Ca(OH)2浆滴粒径的增加,都是先升高,后降低。The structure of the spray drying tower was optimized by installing flow equalization device for deacidification of flue gas produced by co-combustion of MSW with coal.The Fluent software package,RNG k-ε turbulence model,the stochastic model and particle trajectory model were adopted in numerical simulation.The results show that the flue gas is full of the tower and it is prevented from concentrating phenomena on one side of the tower,the mixture of gas and droplet are strengthened,they are all favorable to the absorption of HCl and SO2.When the coburning ratio of MSW and coal increases,the SO2 concentration drops,the HCl concentration increases.With the increasing of the opening area diameter,the cleaning efficiency of SO2 and HCl has increased.The cleaning efficiency has also increased along with the increase of the stoichiometric ratio.With the droplet size of Ca（OH）2 increase the cleaning efficiency of SO2 and HCl has first increased,then decreased.

关 键 词：脱酸 喷雾干燥 均流装置 混烧比 

分 类 号：TQ534.9[化学工程—煤化学工程]