某600MW超临界机组供热扩容改造探讨  

Discussion on Heating Capacity Expansion Retrofit for a 600 MW Supercritical Unit

作　　者：李锋 杨宇 罗舜旭 Li Feng;Yang Yu;Luo Shunxu(Foshan Power Construction Corporation Company,Foshan 528000,Guangdong Province,China;Shanghai Power Equipment Research Institute Co.,Ltd.,Shanghai 200240,China;Foshan Ever Profit Power Plant Co.,Ltd.Foshan 528131,Guangdong Province,China)

机构地区：[1]佛山电建集团有限公司,广东佛山528000 [2]上海发电设备成套设计研究院有限责任公司,上海200240 [3]佛山恒益热电有限公司,广东佛山528131

出　　处：《发电设备》2024年第5期269-273,共5页Power Equipment

摘　　要：某600 MW超临界机组为适应灵活性调峰需要提升低负荷工业供汽能力,在保证汽轮机安全性的前提下,开展了再热器减温喷水置换冷再热供汽和2号高压加热器(简称高加)部分供汽切除置换冷再热供汽2种可行的技术方案研究,从安全性、灵活性、经济性等方面进行比选。结果表明:2号高加部分供汽切除置换冷再热供汽方案虽然经济性较好,但对运行监控系统的可靠性依赖程度较高,并且运行存在一定的安全风险;最终选择再热器减温喷水置换冷再热供汽的方案,虽然其经济性略差,但运行更安全可靠。To meet the requirement of improving the industrial steam supply capacity under low load condition in a 600 MW supercritical unit with flexible peak regulation, under the premise of ensuring the safety of steam turbine, following two feasible technical schemes were compared and selected from the aspects of safety, flexibility, and economy, namely the schemes of the cold reheated steam replaced by the reheater desuperheating water and by partial No.2 high-pressure heater extraction steam. Results show that, although the scheme of the cold reheated steam replaced by the reheater desuperheating water has a better economy, it highly depends on the reliability of the operation monitoring system, which has a certain risk during operation. The scheme of the cold reheated steam replaced by partial No.2 high-pressure heater extraction steam is finally selected, although the scheme has a poor economy, it provides a more safe and reliable operation for the unit.

关 键 词：超临界机组 冷再热蒸汽 供汽 安全性 灵活性 经济性 

分 类 号：TM621.27[电气工程—电力系统及自动化]