FLUIDIZED BED COMBUSTION SYSTEM AND METHOD HAVING AN INTEGRAL RECYCLE HEAT EXCHANGER WITH INLET AND OUTLET CHAMBERS

摘要

A fluidized bed combustion system and method in which a recycle section 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 and the flue gases are passed to a heat recovery section and the separated particulate material to the recycle heat exchanger. The recycle section includes a bypass chamber for permitting the separated solids to pass directly from the separator to the furnace section. A heat exchanger is provided in the recycle section to transfer heat from the separated material in the recycle section to a fluid flow circuit for controlling the temperature of the separated material. The separated material is the recycle section is then passed back to the furnace section.