Method for identifying thermal deviation of platen superheater based on wall temperature

The invention discloses a platen superheater thermal deviation identification method based on wall temperature, and belongs to the technical field of boilers. The method specifically comprises the following steps: receiving original data in a DCS, enabling parameters to be uniformly distributed according to time, normalizing the time sequence of each parameter, and establishing a parameter index; cleaning equipment parameters under an unstable load working condition and an abnormal working condition, and temporarily storing the equipment parameters in a corresponding database; establishing association between the unit heating surface heat deviation and different coal mill combinations put into operation to obtain a heat deviation coefficient, calculating a difference value before and after the heat deviation coefficient to obtain a change trend of the heat deviation, and then obtaining a temperature average value of each heating surface; and performing deviation diagnosis on the wall surface temperature and t