Steam superheater steps of boiler BKZ-420-140-PT-2

The steam superheater is an element of a steam boiler in which water vapour is superheated above the saturation temperature. Steam superheater of the boiler by the nature of heat perception - radiation-convective type.Radiation part consists of gas-tight all-welded panels, shielding the side walls of the rotary gas duct, front, rear walls and ceiling of the downdraft gas duct, as well as screens placed in the furnace chamber. The gas-tight panels are made of pipes and strips and manifolds.

The screens are made of coils and collectors. Convective surfaces are located in the rotary gas duct, they are packages of coils belonging to 1, 3 and 4 stages of the steam superheater. In order to reduce the temperature explorations of steam, steam transfer across the width of the gas duct and mixing in the injection steam coolers are provided.