燃烧后CO_2捕集燃煤发电系统分析  

Exergy Analysis of a Coal Fired Power Plant with Post-Combustion CO_2 Capture

作　　者：张丹[1] 曾涛[1] 徐明厚[1] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室,武汉430074

出　　处：《燃烧科学与技术》2013年第3期220-226,共7页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(51021065);武汉市科技计划资助项目(20081113464)

摘　　要：利用商业软件Aspen Plus 11.1,对一带有燃烧后CO2捕集的600,MW燃煤发电系统进行了详细的热力性能仿真,并基于该仿真结果对该系统开展了详细的分析计算.分析结果表明,燃烧后CO2捕集发电系统的效率为35.59%,较之传统燃煤发电系统,效率下降了8.12%.其中锅炉设备的损失比例为42.49%,是燃烧后捕集系统中损失最大的部分.单乙醇胺(MEA)捕集系统的损失比例为8.64%,具有较大的节能潜力;CO2压缩系统的损失比较小,但有较大的热能浪费,可以用于加热给水以减少系统损失.A commercial software Aspen Plus 11.1 was used to simulate the thermal performance of a 600 MW coal fired power plant with post-combustion CO2 capture. On the basis of the simulation results, the exergy losses and exergy efficiencies of the main components of this system were calculated. The exergy efficiency of the coal fired power plant with post capture is 35.59%, which is 8.12% lower than that of the conventional power plant. The exergy loss of the boiler is the major part of the whole system, which is 42.49% of the total fuel input. The monoethanola-mine （MEA） capture system has great energy saving potential, which has a 8.64% share of the total fuel input. The exergy loss of the CO2 compression system is very low. But there is a huge heat waste in the CO2 compression system, which can be used to heat the feed water.

关 键 词：燃烧后CO2捕集 燃煤发电系统 [火用]分析 节能 

分 类 号：TK16[动力工程及工程热物理—热能工程]