钙基吸收剂捕集1000MW机组烟气中CO_2的性能分析  

CO_2 Capture Performance from Flue Gas in 1000 MW Unit with Using Ca-Based Sorbent

作　　者：张学镭[1] 崔巍[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,河北省保定市071003

出　　处：《电力建设》2015年第5期119-124,共6页Electric Power Construction

基　　金：教育部中央高校基本科研业务费专项资金资助项目(09MG34)~~

摘　　要：针对某1 000 MW超临界机组,建立了基于钙基吸收剂循环煅烧/碳酸化法捕集CO2的系统流程,研究了弛放率、气固分离效率、钙碳摩尔比对煅烧能耗、发电热效率及循环固体质量流量的影响。结果表明:引入碳捕集系统后,机组发电热效率为34.6%,较设计值降低了9.6%;将碳捕集系统回收热量用于发电,电厂净输出功率增加了113.4 MW;随着弛放率的提高,发电热效率、循环固体物料质量流量均下降,煅烧能耗先下降后升高;随着气固分离效率的提高,发电热效率、循环固体物料质量流量均升高,煅烧能耗先下降后升高;随着钙碳摩尔比的提高,煅烧能耗、发电热效率和循环固体物料质量流量均升高。A system process of Cyclic Calcinations / Carbonation based on the method of calcium-based sorbents was proposed for the CO2 capture in a 1 000 M W supercritical pow er unit. The impact of purge rate,the gas-solid separation efficiency and the molar ratio of Ca and C on the energy consumption of calcination,the pow er generation thermal efficiency and the flow rate of circulating solids was studied. The results show that： after the introduction of carbon capture systems,the thermal efficiency of electricity generation for the unit is 34. 6%,w hich is 9. 6 % low er than the designed value; while after using heat recovery of carbon capture system to generate electricity,the net increase in the output pow er of the pow er plant reaches 113. 4M W. With the increase of purge rate,the thermal pow er generation efficiency and the mass flow of solid circulating material decrease,and the energy consumption of calcination decreases first and then increases. With the increase of the efficiency of gas-solid separation,the thermal pow er generation efficiency and the mass flow of solid circulating material increase,and the energy consumption of calcination decreases first and then increases. With the increase of the mole ratio of Ca and C,the energy consumption of calcination,the thermal pow er generation efficiency and the mass flow of solid circulating material all increase.

关 键 词：CO2捕集 煅烧 性能分析 烟气 

分 类 号：TM611[电气工程—电力系统及自动化] X701[环境科学与工程—环境工程]