摘要
超超临界1000 MW机组回热系统对其运行经济性影响很大,其中,双机回热方式是一种更具节能潜力的回热系统设计方案。然而,现有相关研究主要是围绕二次再热机组展开。本文以某2×1000 MW超超临界一次再热机组为研究对象,根据其所在的地理环境与电网负荷特点等,分别给出了10级回热方式与双机联合回热方式2种回热系统设计方案,并对其经济性进行综合对比分析。结果表明:相对于10级回热方案,双机联合回热方案虽然在单台机组上的投资增加了约15万元,但其能耗相对更小、年折合节约发电成本1662万元,综合经济性更佳;同时,通过对小汽轮机的综合优化,双机联合回热系统还具有运行安全性强、调峰效果好等特点,工程应用价值和意义大。
The regenerative system of ultra-supercritical 1000 MW unit has a great influence on its operation economy,among which the dual-engine regenerative system is a more potential energy-saving regenerative system design scheme.However,the existing research is mainly focused on the secondary reheat unit.In this paper,a 2×1000 MW ultra-supercritical primary reheating unit is taken as the research object.According to the geographical environment and the load characteristics of the power grid,two kinds of reheating system design schemes of 10-stage reheating system and dual-machine combined reheating system are presented respectively,and their economy is comprehensively compared and analyzed.The results show that,compared with the 10-stage reheating scheme,although the investment in a single unit is increased by about 150000 yuan,its energy consumption is smaller,the annual equivalent power generation cost is saved by 16.62 million yuan,and the comprehensive economy is better.At the same time,through the comprehensive optimization of small steam turbine,the dual turbine combined regenerator system also has the characteristics of strong operation safety,good peak regulation effect,and so on,and has great engineering application value and significance.
作者
吴志祥
WU Zhi-xiang(Guoneng Shenwan Anqing Power Generation Co.,Ltd.,Anqing 246000,China)
出处
《节能技术》
CAS
2024年第5期434-438,共5页
Energy Conservation Technology
