Several key problems of preventing over-temperature tube-burst in operation of high-temperature tube-panel on superheater and reheater of supercritical and ultra-supercritical boilers have been expounded

including oxide skin produced in the tubes

suddenly occurred disturbance

combustion adjustment

heat-Absorbing deviation along the direction of panel width

thermal deviation on the same panel

flue gas temperature deviation at two sides of the furnace outlet

water-spraying amount for final-stage superheater

and thermal insulation of temperature-measuring points at outlet side of the furnace etc..It is recommended to adopt on-line monitoring device for wall temperature in the furnace

so as to reduce the wall temperature level in furnace for tube panel with theraml deviation

decreasing formation of oxide skin in the tubes

ensuring safe and economic operation of boilers.