Abstract: A circulating fluidized bed reactor (10) is disclosed wherein a non-cyclonic particulate separator (18) is integrally disposed in the gas flow path between the reactor gas outlet (14) and the gas duct (16). The separator (18) comprises an arculate duct (20) having a curvilinear floor (24), the portion thereof which is disposed atop the gas duct (16) having a plurality of openings (28) therein which provide a flow area through which a portion of the gas pass into the gas duct (16). Gas/solids separation is accomplished as the gas is turned sharply from its arcuate path to pass through the openings (28) in the floor (24). The momentum of the particulate solids prevent them sharply turning and cause the solids to continue on their arcuate flow path through the duct (20) in the remaining gas to a solids collection means (40) opening to the solids outlet (26) of the arcuate duct (20).

Abstract: A circulating fluidized bed furnace (10) is disclosed wherein a non-cyclonic particulate separator (18) is integrally disposed in the flue gas flow path between the furnace gas outlet (14) and the flue gas duct (16). The separator (18) comprises an arcuate duct (20 ) having a curvilinear inner wall (24), the portion thereof which is disposed across the inlet to the flue gas duct (16) having a plurality of openings (28) therein which provide a flow area through which a portion of the flue gas pass into the flue gas duct (16). Gas/solids separation is accomplished as the flue gas turns sharply from its arcuate path to pass through the openings (28) in the inner wall (24). The momentum of the particulate solids and the centrifugal forces acting thereon prevent the solids from sharply turning and cause the solids to continue on their arcuate flow path through the duct (20) in the remaining flue gas to a solids collection means (40) opening to the solids outlet (26) of the arcuate duct (20).