集成碳捕集的1000 MW超超临界燃煤机组热力系统优化与性能研究

Optimization and Performance Study of Thermal System of 1000 MW Ultra-supercritical Coal-fired Unit Based on Carbon Capture

为降低CO_(2)的能耗并且提高发电效率,以超超临界二次再热-碳捕集系统为参考系统,提出了耦合太阳和ORC系统的二次再热-碳捕集优化方案。利用Ebsilon软件构建了优化系统模型,并进行了热力性能、经济性和运行性能分析。结果表明:与参考系统相比,优化系统热效率提高了4.78%,热耗降低了1005 kJ/(kW·h),煤耗降低了36.50 g/(kW·h);太阳能辅助系统年运行时间占比为60%,均省煤量可达到2.0×10^(4)t。优化方案具有更好的热经济性并且减少了发电耗煤量,为CO_(2)捕集和减排提供优化思路。

With the purpose of reducing the energy consumption of CO_(2) and promoting the efficiency of power generation,this paper proposes an optimization scheme of double reheat-carbon capture coupled with solar and ORC systems,using the ultra-supercritical double reheat-carbon capture system as the reference system.In this paper,an optimization scheme of double reheat-carbon capture coupled with solar and ORC systems is proposed.The optimized system model is constructed using Ebsilon software.The thermal performance,economics and operational performance of the system were analyzed.The results of the study showed that the thermal efficiency of the optimized system was increased by 4.78%,and the heat consumption was reduced by 1005 kJ/(kW-h)and coal consumption by 36.50 g/(kW-h)compared to the reference system;the annual operating time of the solar auxiliary system is 60%,and the average coal saving can reach 2.0×10^(4) t.The optimized scheme has better thermal economy and reduced coal consumption for power generation,which provides an optimization idea for CO_(2) capture and emission reduction.