超临界二次再热机组烟气再循环系统控制方式优化  

Optimization of Control Mode of Flue Gas Recirculation System of Supercritical Secondary Reheat Unit

作　　者：程伟龙 CHENG Weilong

机构地区：[1]上海电力建设启动调整试验所有限公司,上海200335

出　　处：《电力系统装备》2024年第9期22-24,共3页Electric Power System Equipment

摘　　要：超临界二次再热机组通过主蒸汽两次循环加热使用,可有效降低煤耗,提升发电效率。而增加的一级再热器系统导致锅炉再热器温度控制惯性显著增大。文章论述了烟气再循环技术在二次再热机组温度控制方面的应用原理。针对二次再热机组再热器温度控制难题,文章分析了当前典型的控制策略,着重介绍了再热汽温控制当中的烟气再循环风机、烟气挡板这两个控制系统设计,总结了此种控制方式可能存在的问题,并提出优化建议。The supercritical secondary reheat unit effectively reduces coal consumption and improves power generation efficiency through two cycles of main steam heating.The addition of a primary reheater system results in a significant increase in the temperature control inertia of the boiler reheater.This article discusses the application principle offlue gas recirculation technology in temperature control of secondary reheat units.This article analyzes the current typical control strategies for the temperature control of the reheater in the secondary reheat unit,focusing on the design of theflue gas recirculation fan andflue gas baffle in the reheat steam temperature control.Summarized the possible problems with this control method and proposed optimization suggestions.

关 键 词：二次再热 再热汽温 烟气再循环 

分 类 号：TM64[电气工程—电力系统及自动化]