为了解决空气预热器漏风过大问题，以某电厂660 MW锅炉机组回转式空气预热器为研究对象，对其内部温度场和转子隔板的热变形进行了数值模拟研究，分析转子内部温度分布情况及转子隔板热变形特征。结果表明:不同工况下，转子高温端和低温端温差大小不同，转子隔板的热变形量随着温差的增大而增大；不同工况下，转子隔板最大热变形都发生在二次风侧，最小变形量发生在烟气侧；减少径向漏风量的有效途径是避免在扇形板区域出现较大温差。

In order to solve the problems of large air leakage of the rotary air preheater, the rotary air preheater of a 660 MW boiler unit in a power plant was taken as the research object to numerically simulate the internal temperature field and the thermal deformation of the rotor diaphragm, and analyze the internal temperature distribution situation of the rotor and the thermal deformation characteristics of the rotor diaphragm. The results show that under different working conditions, the temperature difference between the high temperature end and the low temperature end of the rotor is different, and the thermal deformation of the rotor diaphragm increases with the increase of the temperature difference; under different working conditions, the maximum thermal deformation of the rotor diaphragm occurs on the secondary air side, and the minimum deformation occurs on the flue gas side; the effective way to reduce the radial air leakage is to avoid a large temperature difference in the fanshaped plate area.

TK172

山东省重大科技创新工程项目(2019JZZY010454)