Circulating fluidized bed combustion system including a heat exchange chamber between a separating section and a furnace section

Abstract

A top-supported circulating fluidized bed boiler system includes a furnace, having sidewalls of a tube wall construction, for combusting fuel and producing combustion products, a particle separator, connected to the furnace, for separating particles from the combustion products from the furnace, an external, preferably non-cooled, heat exchange chamber connected to the particle separator for removing heat from the combustion products, a return duct, connected to the heat exchange chamber, for returning particles separated by the separator to the furnace, a rigid support construction for supporting elements of the system, and a suspension arrangement for suspending the heat exchange chamber from the rigid support construction. The suspension arrangement includes, for preferably 60% or more of its length, at least one of steam tubes and water tubes at a temperature of about 300 to about 550° C.

Dependencies are inferred from the claim text.