采用汽动给水泵替代电动给水泵实现机组启动的经济性分析

Economics Analysis of Realizing Unit’s Start-up by Using Turbine-Driven Feedwater Pump Instead of Motor-Driven Feedwater Pump

文章分析了采用汽动给水泵替代电动给水泵实现机组启动的节电机理,以及需要解决的关键技术问题,例如:启动汽源问题、给水流量调节和控制、汽动给水泵汽源的切换、机组启动汽动给水泵跳闸处理或邻机汽源故障处理。例举了几个发电厂应用汽动给水泵的事例,粗略统计国华每年可节省厂用电2520万kW,经济效益显著。

The paper analyzes the power-saving mechanism of realizing unit＇s start-up by using turbine-driven feedwater pump instead of motor-driven feed water pump; priefs the key technical problems needing to solve, for example,steam source for start-up, regulation and control of feedwater flow, switching-over of steam sources for turbine-driven feedwater pump,tripping bandling of turbine-driven feedwater pump during unit＇s start-up or the fault bandling of neighbouring unit＇s steam source;and enumerates the application examples in several power plants of Guohua Power,about is million kwh of service power may be economized in one year. economic benefit is obvious.