SINGLE DRUM ALL-WELDED BOILER

摘要

A single drum all-welded boiler system (10) is provided for a furnace (20) having a combustion chamber (22) and a convection pass (26) connected to the combustion chamber in a transition area (28), the system (10) comprising a superheater (60) in the transition area (28), an economiser (60) in the convection pass (26) and a boiler (72) between the superheater (60) and the economiser (20). The boiler (72) and economiser (70) can be made of a plurality of modules each comprising several tubes welded at the top to an outlet header (80,68) and at the bottom to an inlet header (78,74).