CO_2捕集对输运床气化炉IGCC系统技术经济性的影响  

Influences of CO_2 Capture on Techno-economic Performance of Transport Gasifier Based IGCC Systems

作　　者：迟金玲[1] 张士杰[1] 王波[1] 肖云汉[1] 

机构地区：[1]中国科学院先进能源动力重点实验室(工程热物理研究所),北京市海淀区100190

出　　处：《中国电机工程学报》2013年第23期51-59,9,共9页Proceedings of the CSEE

基　　金：中国科学院战略性先导科技专项(XDA07050500)~~

摘　　要：对整体煤气化联合循环(integrated gasificationcombined cycle,IGCC)电站而言,气化剂(氧气/空气)的选择对系统的流程配置、热力性能及经济性已产生较大的影响。在考虑CO2捕集的情景下,研究不同捕集方法的引入对IGCC带来的影响,具有重要的意义。该文分别构建了输运床氧气及空气气化IGCC系统流程,分析了MDEA及Selexol这2种不同捕集方法的引入对IGCC电站技术经济性的影响。结果表明,无论是氧气还是空气气化电站,都更适合于采用Selexol法捕集CO2。然而Selexol法对空气气化电站供电效率的影响大于氧气气化电站。不捕集CO2时,空气气化电站的供电效率比氧气气化电站高约0.46个百分点,而采用Selexol法捕集系统中90%的CO2后,其供电效率则比氧气气化电站低约0.14个百分点。从经济性角度,空气气化电站具有优势,考虑CO2捕集后,其发电成本仍比氧气气化电站低10$/(MW h)。Coal can be gasified in oxygen-blown or air-blown operation of gasifiers,which will greatly affect the system configuration and techno-economic performance of integrated gasification combined cycle（IGCC） power plants.Other than that,the adoption of various CO2 capture technologies will bring new characteristics for IGCC,which is an attractive aspect to research into.Six IGCC power plants based on transport gasifierswere developed to investigate the relative costs and benefits of oxygen-blown or air-blown gasification and of MDEA or Selexol CO2 capture technologies.The results show that,between the two CO2 capture technologies,Selexol process is preferred for both oxygen-blown and air-blown plants.More energy penalty will be introduced by this method for the air-blown plant.The net efficiency of the air-blown plant is higher than that of the oxygen-blown plant by 0.46 percentage points without CO2 capture,but lower by 0.14 percentage points with 90% of CO2 being removed.However,the air-blown IGCC plant has obvious advantages in terms of cost.The generation cost the air-blown plant is higher than that of the oxygen-blown plant by about 10 Yuan/（MW h） even if CO2capture is considered.

关 键 词：整体煤气化联合循环(IGCC) 输运床气化炉 空气气化 氧气气化 CO2捕集 

分 类 号：TK121[动力工程及工程热物理—工程热物理]