600MW 机组超临界变压本生直流锅炉的调试

华润电力常熟第二发电厂1号650MW 汽轮发电机组,含国产首台1952. 21 t/h超临界复合循环锅炉。该直流锅炉有不同于汽包炉的调试过程,如投粉稳压冲管、系统的启动、安全门的整定、锅炉燃烧的初调整及低负荷稳燃的调试等。对调试中出现问题,如炉水循环泵启动中、磨煤机风量显示值不正确、锅炉结焦、磨煤机螺旋输送器轴承两边端盖烧红和中心风控制等问题进行了处理,尤其是注意了水冷壁壁温及分离器出口温度的调整。168 h试运行的结果显示:主要运行参数达到设计要求,机组可稳定、安全运行。

Commissioning on 600 MW Super-critical Combined-circulation Direct-through Boiler

The No.1 650 MW turbine-generator unit in Changshu No.2 Power Plant of Huarun Power Co.adopts the 1~(st) domestic-made 1952.21t/h supercritical combined circulating boiler.Its commissioning is different from the steam drum boiler.Attention has been paid on the problems occurring during the commissioning,including incorrect displaying of air flow for the coal mill during startup of the circulating pump of boiler water,boiler coking,burning to red for the both end covers of bearings for screw conveyor of mills and control of the central air flow,etc..Special attention has been paid on the regulation of the wall temperature of water wall and outlet temperature of the separator.The final result of 168 h commissioning indicates that the main operation parameters have met the design requirements and unit is under stable and safe operation conditions.