摘要
以大唐国际北京高井热电厂350MW级天然气联合循环机组为研究对象,建立了90%碳捕获与电厂系统整合模型,在整合界面热力分析的基础上,评估了3种用以解决供热模式下再沸器热源不足的技术方案:电加热再沸器、低压蒸汽锅炉、补燃式余热锅炉。结果表明:纯凝发电工况下,再沸器抽汽导致净发电效率从56.21%降低至47.28%;热电联产工况下,回收二氧化碳多级压缩机级间热量用于加热热网回水,可使供热蒸汽抽取量减少7.02 t/h;当低压蒸汽全部用于供热时,补燃余热锅炉是最优化的能源整合方案,可以实现90%碳捕获,汽机发电量增加135.84MW?h,发电效率可达到50.2%,同时具备较好的经济性。
A 350MW.h natural gas combined cycle-combined heat and power （NGCC-CHP） plant in Beijing was the research object. An integrated model of NGCC plant and 90% post-combustion CO2 capture was built. Based on the thermodynamic analysis of integration interface, this work evaluated three options for pr,ding the energy necessary for the amine reboiler. The results show that： when the NGCC plant was integrated with full-scale PCC and compression, the efficiency of the power plant deceases from 56.21% to 47.28%; the heat recovered from multistage intercooler can reduce the district heating steam extraction by 7.02 t/h in CHP mode; supplementary firing improves the steam turbine power output up to 135.84MW.h with 50.2% of net equivalent efficiency, while have a good economic performance.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2017年第9期2644-2651,共8页
Proceedings of the CSEE
基金
国家自然科学基金项目(51278035)~~
关键词
天然气–蒸汽联合循环
燃烧后碳捕获
区域供热
再沸器
nature gas combined cycle
post-combustion CO2 capture
district heating system
reboiler
