F - Mech Eng,Light,Heat,Weapons – 27 – B
Patent
F - Mech Eng,Light,Heat,Weapons
27
B
F27B 15/00 (2006.01) B01J 8/26 (2006.01) B01J 8/38 (2006.01) F22B 31/00 (2006.01) F23C 10/10 (2006.01)
Patent
CA 2067688
FLUIDIZED BED COMBUSTION SYSTEM AND METHOD HAVING AN INTEGRAL RECYCLE HEAT EXCHANGER WITH RECYCLE RATE CONTROL AND BACKFLOW SEALING Abstract of the Disclosure A fluidized bed combustion system and method in which a recycle heat exchange section, including an inlet compartment and a heat exchange compartment, is located within an enclosure housing the furnace section of the combustion system. The flue gases and entrained solids from a fluidized bed in the furnace section are separated, the flue gases are passed to a heat recovery section, and the separated particulate material is passed directly to the inlet compartment via a dipleg. The recycle heat exchange section includes a bypass chamber for permitting the separated solids to pass directly from the inlet compartment to the furnace section. Heat exchange tubes are provided in the heat exchange compartment to transfer heat from the separated material in the latter compartment to a fluid flow circuit for heating the fluid flow circuit. The separated material in the heat exchange compartment is passed back to the furnace section. Air is introduced into the inlet compartment below the dipleg and in alignment therewith to control the flow of separated material from the separator and therefore the recycle rate. 1d/9077u
Finlayson & Singlehurst
Foster Wheeler Energy Corporation
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