摘要
为消除常规火力发电机组供热改造后系统运行存在的安全隐患,以某电厂600 MW机组供热改造为例,介绍了中压缸排汽、再热冷段抽汽以及凝汽器补水系统的设计特点,通过对该热力系统设计原理和供热运行方式的分析,得出了汽轮机供热改造后容易发生叶片过流、过压、过热、汽轮机超速等事故或者凝汽器补水出现问题的结论,并且逐个阐明影响设备安全的各个要素以及采取有效的控制手段及保护措施,以避免供热系统发生事故,保证整个机组的安全运行,实现热电联产。
In order to eliminate the potential safety problems which may endanger system operation of conventional thermal power units after heating system retrofit, by taking the heating system retrofit of a 600-MW unit of a power plant for example, the design characteristics such as the medium-pressure section exhaust steam and low-temperature reheat pipe extraction and the condenser water inlet system are presented. Through the analysis on the design principle of the thermal system and its heating operation mode, it is concluded that problems, such as over-current, over-voltage and overheating of blades, turbine overspeed and condenser water replenishment tend to arise after heating system retrofit. Therefore, the factors affecting the equipment safety are clarified. In addition, the effective control and protective measures are also put forward to avoid heating system accidents, ensure the safe operation of the unit, and achieve heat and power cogeneration.
出处
《中国电力》
CSCD
北大核心
2015年第7期72-75,共4页
Electric Power
关键词
火力发电机组
供热改造
设计
控制
保护
热电联产
thermal power generating unit
heating system retrofit
design
control
protection
heat and power cogeneration
