Steam raising plant with combustion chamber and at least one boiler tr - has super heater pipes parallel to back wall of second boiler train and to evaporater pipe bundle

摘要

Natural circulation type steam generator is self-supported and has a finned water wall construction and bottom type burner arrangement. The individual superheater tubes (3, 4) run parallel with the rear wall (2) of the secondary draught path (1) and vertical to the self-supporting vertical evaporator tube bundles which act as support for the superheater tubes. The evaporator tube nests are pairs wire arranged so that four separate tubes are interlinked by a square welded frame with intersecting baffles. An injector cooler may be arranged between the outlet heater of the superheater and the inlet header. The boiler steam drum is supported from the rear wall of the secondary draught path.