MARINE BOILER

摘要

Boiler (10) for generating steam and comprising a furnace wall (12) defining a furnace (22), a casing wall (14) concentrically encircling the furnace wall (12) and jointly with the furnace wall defining a substantially annular interspace (20), steam consucting tubes (16, 26) positioned at the furnace wall and the casing wall and being in connection with top and bottom annular vessels (60 and 62) and a flue gas aperture (24) in the furnace wall for establishment of connection from the furnace (22) to the annular interspace (20). At least one of the two walls, i.e. the furnace wall and the casing wall, and preferably both of the walls, i.e. the furnace wall as well as the casing wall, is constituted by steam generating tubes (16, 26) connected by intermediate flanges (18). Thus, a boiler is provided which is more stable than the prior art boilers and which is not limited to a certain maximum length, but may be provided in any length or size for obtaining the desired effect. In addition, the boiler shows other advantages in comparison with prior art boilers as e.g. a higher reliability, a compact embodiment, a light weight and a high reliability in operation, and it requires only small space and is easy to install and to maintain.