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Modeling carbon dioxide capture from a supercritical power plant with ASPEN Plus.

机译：使用ASPEN Plus对超临界电厂的二氧化碳捕集进行建模。

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摘要

It is likely that in the near future there will be some form of CO2 regulation present in the US. Coal fired power plants are the largest anthroporphic point sources of CO2 emissions and account for 51% of electricity generated in the US. Therefore it is highly probable that CO2 capture will need to be implemented at many U.S. coal fired power plants.;ASPEN Plus was used to model the turbine cycle, boiler and the back-end CO2 capture process. A supercritical power plant burning PRB was modeled, and a MEA-H2O solution was used as the amine for the CO 2 capture unit. Four different versions of the power plant were modeled with different heat rate degradations and improvements. The net unit heat rate, without CO2 capture, increased 7.3% above design for the degraded power plant and decreased 5.13% below design for the refurbished power plant. With CO2 capture, the refurbished power plant produces approximately 80 megawatts more than the degraded unit and has a 16.1% lower net unit heat rate.;It was found that the two improvements that provided the largest benefit to net power and net unit heat rate were installation of new turbine sections and implementation of two flue gas heat exchangers. The new steam turbines decreased net unit heat rate by 2.16% and the flue gas heat exchangers were able to achieve a reduction in net unit heat rate of 2.50%.;One interesting trend noticed in this analysis is that the graphs of the specific reboiler duty were always parabolic in nature and a minimum specific reboiler duty could be associated with one CO2 removal value. This seems to suggest the potential for optimizing the operating conditions of the absorber and stripper based on a given flue gas composition and required CO2 removal level.
机译：在不久的将来，美国可能会有某种形式的二氧化碳管制。燃煤电厂是二氧化碳排放量最大的人为点源，占美国发电量的51％。因此，很有可能需要在许多美国燃煤电厂实施CO2捕集.ASPEN Plus被用来对涡轮机循环，锅炉和后端CO2捕集过程进行建模。对燃烧PRB的超临界电厂进行了建模，并使用MEA-H2O溶液作为CO 2捕集单元的胺。对发电厂的四个不同版本进行了建模，以实现不同的热效率降低和改进。在没有二氧化碳捕集的情况下，退化电厂的净单位发热量比设计值高出7.3％，而翻新电厂的发热量比设计值低5.13％。通过捕获二氧化碳，翻新的发电厂比退化的机组多生产约80兆瓦的电能，净单位发热量降低16.1％.;发现对净功率和净单位发热量提供最大好处的两项改进是安装新的涡轮机部分并实施两个烟气热交换器。新型蒸汽轮机将净单位热量降低了2.16％，烟气换热器能够将净单位热量降低了2.50％。；该分析中注意到的一个有趣的趋势是特定再沸器负荷的图表在本质上始终是抛物线形的，最小的再沸器比重可能与一个CO2去除值相关。这似乎暗示了根据给定的烟气成分和所需的CO2去除水平优化吸收器和汽提塔操作条件的潜力。

著录项

  • 作者

    Szatkowski, Austin Edward.;

  • 作者单位

    Lehigh University.;

  • 授予单位 Lehigh University.;
  • 学科 Engineering Mechanical.
  • 学位 M.S.
  • 年度 2009
  • 页码 139 p.
  • 总页数 139
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;
  • 关键词

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