针对现役机组的CO2捕集系统优化集成

System Optimization of CO_2 Capture Process in an Existing Power Plant

本文在深入分析国内已建电站CO_2捕获性能及能耗分布特点的基础上,就国内600 MW燃煤碳捕获电站普遍存在的能耗高等问题提出了系统集成优化方案.该方案通过汽水系统与脱碳流程的有效集成,实现了余压和中低温热的有效利用,同时降低了化学吸收法脱碳流程对汽水系统安全性的冲击.根据本文的分析,最终可实现现役600 MW电厂加入CO_2捕获系统后,全厂效率提高4个百分点左右.本文提出的思路和方法,为CO_2大规模减排,脱碳电站效率提高提供了一些新的思路和学术见解.

Based on an in-depth analysis of CO2 capture performance and energy consumption distribution of active power plants in China, this paper puts forward a system integrated optimization scheme which aims at solving the common high energy consumption problem of domestic 600 MW unit. With an effective integration of water-steam circulation and carbon dioxide capture process, residual pressure of extraction steam and low temperature heat are effectively recovered, also impacts on the safety of water-steam system due to chemical absorption are strongly mitigated. Results show that the overall efficiency of existing 600 MW power unit can improve about 4 percentage point with an integration of carbon dioxide capture system. This paper comes up with some innovative approaches to lower carbon dioxide emission as well as improve the overall efficiency of power plant integrated with carbon dioxide capture system.