The wall-temperature difference is different in regions of different flue gas temperature

of different tube banks

and under different load of large-capacity supercritical and extra-supercritical boilers

the traditional method of estimating tube-wall temperature in the furnace based on temperature measuring points arranged outside the boiler has already been unable to use

the on-line monitoring system should be adopted to fully monitor the wall-temperature of all the tubes in furnace.The functions of on-line monitoring system for a 600 MW supercritical boiler in Changzhou Power Plant

and the features of superheater and reheater temperature conditions have been presented.In the event of slagging and fouling on the water-wall and platen superheater

the said on-line maintoring system can also accurately monitor tube-wall temperature of the final-stage superheater.