第36卷第8期 北京科技大学学报 Vol.36 No.8 2014年8月 Journal of University of Science and Technology Beijing Aug.2014 沼气提纯过程中二乙醇胺溶液吸收二氧化碳的影响 因素 魏广飞，刘应书区，张辉，李虎，李小康，刘洋 北京科技大学机械工程学院，北京100083 ☒通信作者，E-mail:ysliu@usth.edu.cn 摘要采用交互作用正交试验设计，系统研究了进液流量、进气流量，C0,体积分数、进液温度及其交互作用对填料塔中二 乙醇胺溶液吸收CO2的转化率7和气相总体积传质系数Ka。的影响.经过直观分析和方差分析，评价了各参数对7和Kca。 影响的显著程度.实验发现进液流率、进气流率、CO,体积分数、进液温度，以及C02体积分数与进气流率、进液温度与进液流 率、进液温度与进气流率的交互作用对)影响显著：进液流率、进气流率、C0,体积分数、进液温度、C0,体积分数与进气流率 的交互作用以及进液温度与进气流率的交互作用对Ka。影响显著：进气流率增加，)降低而Ka。增加：进液流率增加，)和 Kca。均增加：进气CO2体积分数增加，n和Kca。均降低；进液温度升高，刀和Kca。均呈先增加后减小趋势. 关键词沼气：提纯：二乙醇胺：二氧化碳：吸收；影响因素 分类号TQ028.2 Influencing factors of CO,absorption by diethanolamine solution for biogas purification WEI Guang-fei,LIU Ying-shu,ZHANG Hui,LI Hu,LI Xiao-kang,LIU Yang School of Mechanical Engineering,University of Science and Technology Beijing.Beijing 100083,China Corresponding author,E-mail:ysliu@ustb.edu.cn ABSTRACT The effects of influencing factors such as gas flow rate,liquid flow rate,CO,volume fraction,absorption temperature and their interactions on the percent conversion n and the volumetric overall mass transfer coefficient in gas phases Kca.by diethano- lamine (DEA)aqueous solution were systematically studied by using orthogonal experimental design and statistical analysis.The im- pact significance of these influencing factors was estimated.It is found that gas flow rate,liquid flow rate,CO,volume fraction,ab- sorption temperature,the interactions between CO volume fraction and gas flow rate,between absorption temperature and liquid flow rate,and between absorption temperature and gas flow rate have remarkable effect on:however,gas flow rate,liquid flow rate,CO volume fraction,absorption temperature,the interactions between gas flow rate and CO volume fraction and between gas flow rate and absorption temperature have distinguished influence on Kca With the increment of gas flow rate,n decreases,while Ka increases. nand Kca increase as the liquid flow rate increases,but they decrease as the CO volume fraction increases.The impact of absorption temperature on n and Kea is approximately parabolic. KEY WORDS biogas:purification:diethanolamine:carbon dioxide:absorption:influencing factors 符号表 ca,cu溶质在液相主体和相界面处浓度，kmol·m3: 填料有效、湿润比表面积，m2·m3: E 化学吸收增强因子： 填料塔中C02体积分数： 单位塔截面积惰性气体流率，kmol·m2s: 收稿日期：201306-15 基金项目：国家高技术研究发展计划“生物天然气净化提纯关键技术研究”资助项目(2012AA101802-3) DOI:10.13374/j.issn1001-053x.2014.08.017:http://journals.ustb.edu.cn第 36 卷 第 8 期 2014 年 8 月 北京科技大学学报 Journal of University of Science and Technology Beijing Vol． 36 No． 8 Aug． 2014 沼气提纯过程中二乙醇胺溶液吸收二氧化碳的影响 因素 魏广飞，刘应书，张 辉，李 虎，李小康，刘 洋 北京科技大学机械工程学院，北京 100083  通信作者，E-mail: ysliu@ ustb． edu． cn 摘 要 采用交互作用正交试验设计，系统研究了进液流量、进气流量、CO2 体积分数、进液温度及其交互作用对填料塔中二 乙醇胺溶液吸收 CO2 的转化率 η 和气相总体积传质系数 KG ae 的影响． 经过直观分析和方差分析，评价了各参数对 η 和 KG ae 影响的显著程度． 实验发现进液流率、进气流率、CO2 体积分数、进液温度，以及 CO2 体积分数与进气流率、进液温度与进液流 率、进液温度与进气流率的交互作用对 η 影响显著; 进液流率、进气流率、CO2 体积分数、进液温度、CO2 体积分数与进气流率 的交互作用以及进液温度与进气流率的交互作用对 KG ae 影响显著; 进气流率增加，η 降低而 KG ae 增加; 进液流率增加，η 和 KG ae 均增加; 进气 CO2 体积分数增加，η 和 KG ae 均降低; 进液温度升高，η 和 KG ae 均呈先增加后减小趋势． 关键词 沼气; 提纯; 二乙醇胺; 二氧化碳; 吸收; 影响因素 分类号 TQ 028. 2 Influencing factors of CO2 absorption by diethanolamine solution for biogas purification WEI Guang-fei，LIU Ying-shu ，ZHANG Hui，LI Hu，LI Xiao-kang，LIU Yang School of Mechanical Engineering，University of Science and Technology Beijing，Beijing 100083，China  Corresponding author，E-mail: ysliu@ ustb． edu． cn ABSTＲACT The effects of influencing factors such as gas flow rate，liquid flow rate，CO2 volume fraction，absorption temperature and their interactions on the percent conversion η and the volumetric overall mass transfer coefficient in gas phases KG ae by diethano￾lamine ( DEA) aqueous solution were systematically studied by using orthogonal experimental design and statistical analysis． The im￾pact significance of these influencing factors was estimated． It is found that gas flow rate，liquid flow rate，CO2 volume fraction，ab￾sorption temperature，the interactions between CO2 volume fraction and gas flow rate，between absorption temperature and liquid flow rate，and between absorption temperature and gas flow rate have remarkable effect on η; however，gas flow rate，liquid flow rate，CO2 volume fraction，absorption temperature，the interactions between gas flow rate and CO2 volume fraction and between gas flow rate and absorption temperature have distinguished influence on KG ae ． With the increment of gas flow rate，η decreases，while KG ae increases． η and KG ae increase as the liquid flow rate increases，but they decrease as the CO2 volume fraction increases． The impact of absorption temperature on η and KG ae is approximately parabolic． KEY WOＲDS biogas; purification; diethanolamine; carbon dioxide; absorption; influencing factors 收稿日期: 2013--06--15 基金项目: 国家高技术研究发展计划“生物天然气净化提纯关键技术研究”资助项目( 2012AA101802--3) DOI: 10． 13374 /j． issn1001--053x． 2014． 08． 017; http: / /journals． ustb． edu． cn 符号表 ae 填料有效、湿润比表面积，m2 ·m － 3 ; c 填料塔中 CO2 体积分数; cA，cAi 溶质在液相主体和相界面处浓度，kmol·m － 3 ; E 化学吸收增强因子; GB 单位塔截面积惰性气体流率，kmol·m － 2·s － 1 ;