摘要
以某电厂1000 MW超超临界火电机组为例,对增设外置式蒸汽冷却器的不同方案进行了性能对比分析,介绍了改造步骤并分析了改造效果。结果表明:随着负荷的降低,增设外置式蒸汽冷却器的节能效果更明显;该方案不增加管道沿程阻力、不排挤除氧器抽汽,同时可提高SCR脱硝系统入口烟温、降低汽轮机热耗率,具有安全性和节能性。
Taking the 1000 MW power unit as an example,a comparative analysis was conducted on the performance of different retrofit schemes for the unit by adding external steam coolers,with focus on the retrofit steps and effectiveness.Results show that with the reduction of unit load,the energy-saving effectiveness becomes more obvious by adding external steam coolers.The scheme proposed would not increase the flow resistance in the pipeline and push out the steam extraction of the deaerator,but may increase the inlet gas temperature of the SCR denitrification system and reduce the heat consumption of the steam turbine,resulting in high safety and energy-saving effects of the unit.
作者
朱晓磊
李剑宁
张胤
Zhu Xiaolei;Li Jianning;Zhang Yin(Shanghai Power Equipment Research Institute Co., Ltd., Shanghai 200240, China;Shanghai Shangdian-Caojing Power Generation Co., Ltd., Shanghai 201500, China)
出处
《发电设备》
2020年第1期60-65,共6页
Power Equipment
关键词
火电机组
外置式蒸汽冷却器
高压加热器
给水温度
过热度
煤耗
thermal power unit
external steam cooler
high-pressure heater
feed water temperature
degree of superheat
coal consumption
