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作 者:李振[1] 赵丽凤[1] 王波[1] 迟金玲[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14期9-17,114,共9页Proceedings of the CSEE
基 金:国家高技术研究发展计划项目(2008AA05A302);科技部国际合作项目(2010DFB70560)~~
摘 要:对新型高温离子输送膜(ion transport membrane,ITM)制氧技术应用于IGCC进行了系统集成与热力性能分析,通过与深冷空分技术比较探讨其为IGCC系统供电效率带来的提升潜力,评估ITM空分整体化率、氧气分离率、氮气回注温度(方式)对系统供电效率的影响。研究表明:采用完全整体化ITM空分技术的IGCC供电效率较完全整体化深冷空分IGCC电站提高1.11个百分点,ITM单元中更适宜采用高效轴流式空气压缩机;当产品氧气侧压力不变,通过改变分离器结构或尺寸来改变ITM氧气分离率时,系统供电效率变化不大;当通过改变产品氧气侧压力改变分离率时,系统供电效率随ITM氧气分离率的升高而下降;此外,分离后的富氮空气直接回注燃烧室较降温至阀站限制温度(276.67℃)回注燃烧室系统供电效率高约0.42个百分点。The present work performed system integration and thermodynamic analysis of IGCC plants with the advanced ion transport membrane (ITM) air separation technology, explored how much IGCC could benefit from ITM in comparison to cryogenic air separation and assessed effects of the degree of integration, the O2 separation rate, and the reinjection N2 temperature of ITM unit on the IGCC net efficiency. The results show that the net efficiency of IGCC with full integration of ITM technology experiences an improvement of 1.11 percentage points compared with the IGCC with full integration of cryogenic air separation. The efficient axial flow compressor is more suitable for the ITM process. When the pressure ofproduct-O2 remains constant, the IGCC net efficiency is almost unchanged with the various O2 separation rate by changing the size or structure of the transport membrane. However, if the O2 separation rate is changed by varying the pressure of product-O2, the net efficiency of IGCC will decrease along with the increase of the O2 separation rate. In addition, if the reinjection N2 is cooled to 276.67℃, the IGCC net efficiency will decrease by 0.42 percentage points with respect to the system whose N2 is reinjected directly to the combustor.
关 键 词:整体煤气化联合循环 深冷空分 离子输送膜 系统集成
分 类 号:TM611[电气工程—电力系统及自动化]
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