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http://www.paper.edu.cn - 1 - 中国中国科技论文在线科技论文在线 单乙醇胺（单乙醇胺（MEA）蒸汽再压缩碳工艺的模拟与优化碳工艺的模拟与优化# ）蒸汽再压缩-分流解吸脱分流解吸脱高红霞，符开云，那艳清，梁志武，童柏栋**（湖南大学化学化工学院, 湖南省化石能源低碳化高效利用重点实验室, 湖南长沙 410082） 摘要摘要：针对目前 CO2捕获技术能耗较高的问题，利用 ProMax3.2 化工流程模拟软件，建立单乙醇胺（MEA）溶液吸收 300MW 燃煤电厂烟道气中二氧化碳（CO2）捕集系统的过程模型。对塔顶蒸汽再压缩-分流解吸流程进行模拟研究，在保证 CO2 捕获率 90%的前提下，采用 TSWEET 动力学模型，对富液流股 Rich2 摩尔分率、富液流股 Rich2 进料位置及压缩机出口压力进行灵敏度分析， 获取了最优的工艺条件。 新流程配置当量功最低为 0.39GJ/t CO2，其中再沸器负荷为 1.98 GJ/t CO2，压缩功为 0.06 GJ/t CO2，与传统工艺流程相比，系统总能耗降低 30.36%。 关键词关键词：二氧化碳捕集；单乙醇胺（MEA）；蒸汽再压缩；当量功 中图分类号中图分类号：TQ028.1 基金项目：博士点基金（20130161110025）；国家自然科学基金（21376067) 作者简介：高红霞（1987-），女，博士研究生，CO2 捕获与分离技术 通信联系人：梁志武（1965-），男，教授，博导，CO2 捕获与分离技术. E-mail: zwliang@hnu.edu.cn 5 10 15 Simulation and optimization of absorption split stripping with vapor recompression process for CO2 capture using monoethanolamine Gao Hongxia, Fu Kaiyun, Na Yanqing, Liang Zhiwu, Tong Baidong (Provincial Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing Carbon-dioxide, College of Chemical Engineering, Hunan University, Changsha 410082, Hunan, China) Abstract: A process model of Carbon dioxide (CO2) capture from a 300 MW power plant flue gas using 30 wt% aqueous monoethanolamine (MEA) was established and simulated to overcome the drawback of relatively high energy consumption of traditional technology. The model was performed on ProMax3.2. A rigorous model built on SWEET kinetics of ProMax was used to simulate the exothermic, reversible chemical reactions in MEA-CO2 system in the absorption/regeneration process. In addition, sensitivity analyses were performed to evaluate the effects of key parameters (e.g. Rich2 feed fraction, Rich2 feed location and compressor outlet pressure) of the absorption split stripping with vapor recompression process at the given 90% CO2 removal efficiency. In this work, the minimal total equivalent works of absorption split stripping with vapor recompression process was 0.39 GJ/t CO2, the reboiler duty and compression work were 1.98 and 0.06 GJ/t CO2, respectively. The simulation results showed that the novel process configuration resulted in great improvement with a reduction of total equivalent work by 30.36% compared to the baseline process. Key words: Carbon dioxide capture; Monoethanolamine; vapor recompression; total equivalent work 20 25 30 35 0 引言引言 40 捕集CO2并对其进行资源化利用是控制碳排放的有效途径之一。燃煤电厂烟气是CO2的一个集中排放源，其CO2排放量占我国总排放量的30%左右，因此减少燃煤电厂烟气中CO2的排放对控制温室效应有着极其重要的意义。目前，燃煤电厂碳捕集技术主要包括吸收法、