摘要
工业供热机组抽汽量大或电负荷低供热时抽汽点后低压回热系统无法正常投入,常规回热系统方案高品质蒸汽回热利用效率低,梯级利用汽轮机带低压回热系统方案实现低压回热系统用汽梯级利用,加热凝结水同时做功发电,提升回热系统效率;2年多发电收益应可弥补建设成本增加;原主汽轮机低压模块取消低压回热抽口,通流效率和结构可靠性提高,凝汽器实际运行背压更低,整机效率提升。低压双机回热系统方案方案还可使整个系统设备数量更少、集成度更高。方案用于新建工业供热机组也可提效增收。
The low-pressure regenerative system can not be put into operation normally when the industrial heat-supply units have large extraction steam or low electric load heat-supply,and the high quality steam heat recovery efficiency of the conventional heat recovery system scheme is low,cascade use of steam turbine with low-pressure recuperation system scheme to realize cascade use of steam for low-pressure recuperation system,heating condensate and power generation at the same time to improve the efficiency of the recuperation system;The original low-pressure module of the main steam turbine cancels the low-pressure heat recovery extraction,which improves the flow efficiency and structural reliability,the actual operation back pressure of the condenser is lower and the efficiency of the whole turbine is improved.The low-pressure dual-unit regenerative system scheme can also make the whole system with less equipment and higher integration.The scheme can also be used to increase the efficiency and income of new industrial heat-supply units.
作者
史宣平
刘金芳
彭雲雯
喻敏
李煜
SHI Xuanping;LIU Jinfang;PENG Yunwen;YU Ming;LI Yu(Dongfang Turbine Co.,Ltd.,Deyang Sichuan,618000)
出处
《东方汽轮机》
2024年第2期1-5,11,共6页
Dongfang Turbine
关键词
回热系统
提效
梯级利用
低压双机
regenerative system
improve efficiency
casecade utilization
double LP turbine
