FLUIDIZED BED COMBUSTION SYSTEM AND METHOD HAVING A RECYCLE HEAT EXCHANGER WITH A NON-MECHANICAL SOLIDS CONTROL SYSTEM

摘要

FLUIDIZED BED COMBUSTION SYSTEM AND METHOD HAVING A RECYCLE HEAT EXCHANGER WITH A NON-MECHANICAL SOLIDS CONTROL SYSTEM A fluidized bed combustion system and method in which a recycle heat exchange 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 heat exchange section. The heat exchange section includes a bypass chamber for permitting the separated solids to pass directly from the separator to the furnace section. A heat exchange chamber is provided in the recycle heat exchange section which receives the separated materials from the bypass chamber and transfers heat from the separated material to a fluid flow circuit. The separated material in the heat exchange chamber is then passed back to the furnace section. 1d-8567u