CO2化学吸收技术的模拟及环境影响评价  

Simulation of CO_2 Chemical Absorption Process and Environmental Assessment

作　　者：尤健[1] 何雅玲[1] 姚森[1] 李明佳[1] 

机构地区：[1]西安交通大学能源与动力工程学院,热流科学与工程教育部重点实验室,陕西西安710049

出　　处：《工程热物理学报》2014年第1期17-21,共5页Journal of Engineering Thermophysics

基　　金：国家重点基础研究发展计划(973计划)(No.2013CB228304);教育部高等学校博士学科点专项科研基金优化发展领域资助项目(No.20120201130006)

摘　　要：本文采用二乙醇胺(DEA)作为化学吸收剂,通过流程模拟工具Aspen plus对电厂烟道气的CO_2捕集过程进行模拟,分析各个关键参数对系统性能的影响。最后利用MATLAB软件构建了三种模型,对CO_2捕集技术的环境影响进行评价。结论表明:升高吸收溶液温度会减少DEA溶剂损失,降低再沸器热负荷,不过提高溶液温度会消耗额外的能量;当吸收溶液质量分数为0.25时,再沸器消耗的等效功最少;在轮船运输场景下,当泄漏因子取0.05时,其有效排放因子大于参考电厂的排放因子,CCS技术在减缓气候变暖中不会起到作用.A CO2-capture process for the flue gas from electric power plants is modeled by the simulation tool Aspen plus in this paper. The DEA is used as chemical absorption for CO2-capture. And then the effects of the critical parameters to the system performance are analyzed. At last, three models are built by MATLAB to evaluate the environmental impact of CCS （carbon capture sequestration） technology. The results show that the higher temperature of the solution could reduce the DEA loss and the reboiler heat duty. However, raising the temperature of the solution will lead to additional energy consumption. The reboiler heat duty becomes the lowest when the mass fraction of DEA （diethanolamine） of the solution is 0.25. When the leakage factor of the ship transport scenario is 0.05, the effective emission factor of the plant is higher than that of the reference plant, and then the CCS technology will not play a role in the mitigation of the climate warming.

关 键 词：CO2捕集 ASPEN PLUS 二乙醇胺 环境影响 

分 类 号：TK124[动力工程及工程热物理—工程热物理]