摘要
有机胺化学吸收法是目前应用于燃煤电厂最主要的碳捕集技术。有机胺再生过程由热驱动,需消耗大量取自汽轮机组的蒸汽,导致燃煤电厂发电效率下降,发电成本大幅升高,限制了碳捕集技术在单机容量和配置数量2个层面的规模化应用。优化系统能量热集成利用是改善上述问题的重要途径。以碳捕集子系统和电厂系统间的热能集成利用方式为主要目标,从热集成优化理论和工程能量系统优化两方面出发进行讨论与分析。在热集成优化理论方面,分别阐述了?分析法和夹点分析法的原理、使用方法,和在煤电碳捕集系统应用的成果以及局限性,提出了建议研究方向;在工程能量系统优化方面,分析了蒸汽抽汽参数优化、蒸汽过热度利用方式、凝结水余热利用方式、碳捕集与压缩余热利用方式和多种辅机应用方式的有益效果,讨论了相关方案在工程实施中可能面临的可行性和经济性问题。文中对相关内容的讨论可为进一步降低系统能耗提供参考与思路。
Chemical absorption using amine solution takes the dominant position for post combustion CO_(2) capture of coal-fired power plants,the regeneration of amine is thermally driven,consuming large amount of steam extracted from turbine units,which results in severe power generation efficiency penalty and higher power generation cost.This limitation restricts its large-scale application in terms of both single-unit capacity and project quantity.Optimizing the heat application method in the system is an important approach to address the aforementioned issues.Focusing on the thermal energy integration utilization between the carbon capture subsystem and the power plant system,discussions and investigations are performed from the perspectives of thermal integration optimization theory and engineering energy system optimization.In terms of thermal integration optimization theory,the principles,usage methods,application results and the limitations of the exergy analysis and the pinch point analysis method in coal-fired carbon capture systems are discussed,and the suggested research interests are proposed.In the aspect of engineering energy system optimization,the beneficial effects of steam extraction parameters optimization,superheated steam utilization methods,condensate waste heat utilization methods,carbon capture and compression waste heat utilization methods,and various auxiliary machine application methods are analyzed,as well as the feasibility and economic problem of the mentioned methods during implementations.The research can provide references and ideas for further reducing system energy consumption of carbon capture of coal-fired power plants.
作者
王润宇
赵兴春
马欣强
黄艳
杨亚利
赵晓辉
WANG Runyu;ZHAO Xingchun;MA Xinqiang;HUANG Yan;YANG Yali;ZHAO Xiaohui(Northwest Electric Power Design Institute Co.,Ltd.of China Power Engineering Consulting Group,Xi’an 710075,China;Guoneng Jinjie Energy Co.,Ltd.,Yulin 719319,China)
出处
《热力发电》
北大核心
2025年第6期168-177,共10页
Thermal Power Generation
基金
陕西省博士后科研项目(2023BSHGZZHQYXMZZ19)。
关键词
二氧化碳捕集
系统热集成
能量优化
carbon dioxide capture
system heat integration
energy optimization
