Steam generator

Details Steam generator Steam generator

F - Mech Eng,Light,Heat,Weapons

22

B

122/27

F22B 31/00 (2006.01)

Patent

CA 1314776

ABSTRACT A steam generator using a fluidized bed furnace and comprising a gas-tight combustion chamber, with a fluidized bed in its lower region and defining a space above the fluidized bed containing a plurality of heated surfaces. A plurality of primary separators communicate with the space within the combustion chamber for removing solids from flue gases exiting the combustion chamber. A solids return system communicates with the separators for returning solids to the fluidized bed and a pressurized containment vessel is provided for the combustion chamber, primary separators and solids return system. Thus, in the steam generator of this invention, all the systems required for its operation can be accomodated within a common pressure vessel. The steam generator is so constructed that it supplies the steam needed to drive a conventional steam turbine. By using pressure within the combustion chamber the performance of the steam generator is considerably enhanced. The temperature of the flue gases is so reduced that the gases can be utilized at the existing pressure in a gas turbine to drive the air compressor. When this is done, there is no need for hot-gas filters and systems to remove the waste heat. For this reason, the steam generator can be used both for new plants and to replace an existing boiler in the water-circulating stage of an existing steam-powered generating plant. PAT 11698-1

555082

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