论文部分内容阅读
对高温再热器管壁温度、烟气温度的实时监测和分析计算表明，高温再热器的管屏变形不是由管壁或工质温度超限引起，而是由于进／出口温度差，以及同屏各管进／出口温度偏差所产生的胀差引起。同屏管夹破坏是因管子膨胀不畅，管夹焊缝应力超过许用应力，管夹的焊接强度不够而拉裂造成；定位管与各屏外管套的垂直膨胀最不同而产生相对位移，形成定位管脱开后错位。
The real-time monitoring and analysis of the wall temperature and flue gas temperature of the high temperature reheater show that the deformation of the tube screen of the high temperature reheater is not caused by the overheat of the tube wall or the working fluid, but due to the temperature difference between the inlet / outlet and With the screen into the tube inlet / outlet temperature deviation caused by the expansion. The same screen tube clip damage is due to poor tube expansion, pipe clip weld stress exceeds allowable stress, the clip does not weld the welding strength enough to cause cracking; positioning tube and the outer tube of the vertical expansion of the most different from the relative displacement , The formation of positioning tube dislocation after dislocation.