MEA/DEA化学法捕集电厂烟气CO_2系统再生能耗分析  

Analysis of Regeneration Energy Consumption of CO_2 capture with MEA and DEA from Power Plant Gas

作　　者：刘炳成[1,2] 李停停[2] 张煜[1] 张建[1] 李庆领[2] 

机构地区：[1]胜利石油管理局,山东东营257000 [2]青岛科技大学机电工程学院,山东青岛266061

出　　处：《太原理工大学学报》2010年第5期608-612,共5页Journal of Taiyuan University of Technology

基　　金：国家科技部863重点支撑资助项目(2008BAE65B00);胜利石油管理局博士后科技攻关项目;青岛科技大学博士专项基金资助

摘　　要：基于胜利电厂4万t/a烟气CO2捕集和纯化系统的设计与运行情况,推导出化学法CO2捕集工艺系统再生能耗的计算公式,分别探讨了吸收装置性能、吸收剂性质和贫富液换热器性能对再生能耗的影响,比较了MEA与DEA两种吸收液的再生能耗随吸收液浓度、可再生度以及贫富液换热器性能的变化规律。分析结果表明:在一定质量浓度极限内,提高吸收剂溶液的浓度可以降低再生能耗;通过对吸收剂进行适当配比,也可以有效降低再生能耗;提高富液的再生度可以降低再生能耗;提高贫富液换热器的性能在一定程度上可以降低再生能耗,但是投资成本也相应增加,应在投资成本和再生能耗之间选择一个优化的贫富液换热器的性能值。On the basis of the operation data of 4.0 ×104 t/a CO2 capture and purification system from power plant flus gas,the capture process was analyzed and a general regeneration energy calculation model was conducted.The influences of absorber performance,absorbent characteristic and heat exchanger＇s ability on regeneration energy consumption were analyzed separately.Furthermore,the comparison of regeneration energy between MEA and DEA along with the variation of absorbent concentration and absorbent regeneration level was conducted.Results indicate that the absorbent regeneration energy consumption could be reduced by using increased absorbent concentration,proper blending absorbents type and content and enhancing heat exchanger ability.

关 键 词：电厂烟气 CO2捕集 吸收剂 再生能耗 

分 类 号：TQ028.8[化学工程]