Through three-dimensional tube - wall temperature calculation of the front panel superheater for a tangential firing boiler of 600 MW unit under six operating con-ditions

namely BMCR

BRL

100 % ECR

75 % sliding pressure. 50 % sliding pressure

and cut - off of the high - pressure beater

a typical three - dimensional tube - wall temperature distribution of the front panel superheater

and positions at which the highest tube - wall temperature being occurred

as well as values of the highent tube - wall temperature under various operating conditions have been obtained. Based on results of calculating the tubewall temperature of the superheater with dividing panel

a optimi-zing design scheme has been put forward for designing the superheater and selecting the materials used.