填料塔中磷酸钠缓冲溶液吸收低体积分数SO_2的体积传质系数  

Volumetric mass transfer coefficients of dilute SO_2 absorption into aqueous of sodium phosphate in packed column

作　　者：袁志国[1,2] 刘有智[2] 彭博[2] 

机构地区：[1]太原理工大学化学化工学院,山西太原030029 [2]中北大学化工与环境学院,山西太原030051

出　　处：《现代化工》2013年第10期112-115,共4页Modern Chemical Industry

基　　金：山西省青年科技研究基金项目(2011021012);山西省科技攻关项目(20130321035-02)

摘　　要：为满足磷酸一钠和二钠缓冲溶液脱硫设计开发的需要,采用磷酸钠缓冲盐溶液为吸收剂,测定和计算了在鲍尔环填料塔中磷酸钠溶液吸收模拟烟气中SO2的体积总传质系数K Y a。在常温常压下,考察了空塔气速、喷淋密度、入口SO2体积分数、吸收液磷酸根浓度和初始pH等工艺参数对K Y a的影响。结果表明,K Y a随着空塔气速、喷淋密度、初始pH和磷酸根浓度的增加而增大;随着入口SO2体积分数的增加先增加后减小;该体系的传质过程受气膜和液膜共同控制。The volumetric overall mass transfer coefficients （KYa） for SO2 removal from simulated flue gas into aqueous solution of sodium phosphate in a packed column are measured under different operation conditions,in order to provide reference data for the future industrial design.The KYa value is investigated over ranges of main operating variables,the gas llow rate,the liquid drenching density,the concentration of SO2 in inlet gas,initial pH and the concentration of phosphate in absorption solution.The results show that KYa can be improved by increasing gas flow rate,liquid drenching density,concentration of phosphate and initial pH value of the absorption solution.It increases firstly and then decreases with the increase of SO2 concentration in inlet gas.The KYa can be controlled together by film and liquid membrane.

关 键 词：SO2 磷酸钠溶液 传质系数 吸收 填料塔 

分 类 号：X701.3[环境科学与工程—环境工程] TQ028[化学工程]