Integrated Characteristics of Air Separation Unit Scheme in Integrated Gasification Combined Cycle System
Integrated Characteristics of Air Separation Unit Scheme in Integrated Gasification Combined Cycle System
复制标题
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Cai Ning-sheng
中科院分区：
文献类型：
--
作者：
Cai Ning-sheng
分析了整体煤气化联合循环（IGCC）空分装置的整体特性，结果表明，空压机压比的增大使空分过程困难，提高压比有利于降低制氧电耗，提高空气蒸馏分离过程的发电效率。综合考虑NOx排放和制氧电耗，推荐IGCC系统采用空分设备的氧纯度为0.85。空分设备与燃气涡轮机的集成特性表明，随着空分设备集成度的增加，IGCC系统的发电效率先增加后降低，在集成度为0.80时，IGCC系统的发电效率最高。与独立空分方案相比，考虑到从燃气涡轮机压缩机抽取的空气的显热可以在将来被开发，集成空分方案的IGCC系统具有提高发电效率的潜力。
The integrated characteristics of air separation unit(ASU) in integrated gasification combined cycle(IGCC) were analyzed.The results show that increase of air compressor pressure ratio made the air separation process difficult,and caused increase of air pressure potential energy consumption in air distillation separation process.While increased pressure ratio was beneficial to reduce the power consumption for oxygen production and increase the power generation efficiency of IGCC.Comprehensively considering the NOx emission and power consumption for oxygen production,0.85 oxygen purity of ASU was recommended for IGCC system.The integrated characteristics of ASU and gas turbine showed that power generation efficiency of IGCC system increased first and then reduced with ASU integration degree increasing,and the highest power generation efficiency of IGCC could be achieved at the integration degree 0.80.Furthermore,compared with independent ASU scheme,IGCC system with the integrated ASU scheme hold potential to improve power generation efficiency,considering sensible heat of air drawn from gas turbine compressor could be exploited in the future.