300MW CFB锅炉无电泵的启动实践

红河发电公司300 MW循环流化床锅炉给水泵系统配置有两台汽动给水泵并列运行时,可供给锅炉100%BMCR的给水量;一台50%BMCR容量的电动给水泵作备用。红河发电公司2号锅炉在这次启动过程中,电动给水泵电机烧毁无法投入使用,1号机组也处于停机状态,采用启动锅炉汽源作为除氧器加热和机组轴封汽源、汽动给水泵的备用汽源,锅炉升压后通过汽轮机高旁、低旁配合调节,保证再热蒸汽压力在0.6～0.8 MPa之间,用本机的冷再汽源作为汽动给水泵的汽源冲转,通过汽动给水泵向锅炉汽包上水,顺利完成了机组的启动工作。

Start-up Experience of Motor Feedwater Pump Fault of 300MW CFB Boiler

Feedwater pump system of 300MW circulating fluidized bed boiler in Honghe Power Generation Company consists of two turbine feedwater pumps which can provide feedwater of boiler 100% BMCR and one 50% BMCR motor feedwater pump acted as reserved.In the start-up process of unit 2,with damaging of motor feedwater pump’s motor and shutdown of unit 1,adopted start-up boiler’s steam as deaerator heating,gland system steam and stand-by steam of turbine feedwater pump,adapted turbine’s high and low stand-by valves after main steam pressure increasing in order to guarantee reheating steam pressure between 0.6MPa and 0.8MPa,then started turbine feedwater pump by reheating steam,pumped boiler drum with turbine feedwater pump.Eventually,the unit 2 is started successfully and this kind of start-up way provides 300MW CFB boiler with technique support.