800MW级燃气-蒸汽联合循环机组余热锅炉的停炉保养

Maintenance for Heat Recovery Steam Generator of 800 MW-class Gas-steam Combined Cycle Unit

介绍了燃气-蒸汽联合循环中余热锅炉停炉腐蚀的原理和保护的方法,并以北京京桥热电1号余热锅炉为例,介绍了在调试期间该锅炉采用的氨-联氨钝化烘干法以及冲氮湿法保养的原理和具体的操作步骤,同时提出了采用不同方法进行保养时需要注意的事项。

In this paper, the stopped boiler corrosion principles and protection methods of Heat Recovery Steam Generator （HRSG） of combined gas-stream cycle unit are introduced. The HSRG No. 1 in Beijing Jingqiao thermal plant is taken as an example to introduce the maintenance principle and the concrete operating procedures of ammonia-hydrazine passivation drying method and rushed nitrogen wet maintenance method used during commissioning of the boiler. And the attention points of different maintenance methods are proposed.