回转式空气预热器改造技术的探讨

为解决电厂锅炉空气预热器漏风率过高的问题，提出了新的空气预热器改造方案，其技术关键是通过安装新的扇形板和轴向密封板，形成双密封；在转子轴的密封中增加迷宫密封等方法，使漏风率由30％下降到9％，保证了锅炉正常运行及运行的经济性。

Discussion of the Retrofit Technology of Rotation Airpreheater

Air preheater's high leakage is the main factor which affect boiler running safety and running economically. In the airpreheater retrofit of Jiangjin thermal power station, installed new-design sectorplate and axial sectorplate, became double sealing construction; Add labyrinthine sealing to main shaft, and so on, then the leakage of airpreheater was fall to 9% from 30%. The retrofit approaches were recited and the know-how of retrofit was discussed in this article.