Patent ID: 7771585

Claim:
A method for recirculating solids in a circulating bed reactor, comprising: providing a particulate laden gas-solids stream in a line downstream from a circulating bed reactor and upstream from a desaltation device, wherein the particulate laden gas-solids stream has an average flow velocity in the range of from approximately 25 to 75 feet/second, and wherein the particulate laden gas-solids stream has a solids loading in gas in the range of 2 to 20 pounds of particulate material per cubic feet of gas; introducing the particulate laden gas-solids stream into the desaltation device wherein the particulate laden gas-solids stream is separated into a reduced particulate laden gas-solids stream and a first dense stream of solids; introducing the first dense stream of solids to a standpipe and introducing the reduced particulate laden gas-solids stream to a cyclone, wherein the reduced particulate laden gas-solids stream is separated into a substantially particulate free process gas and a second dense stream of solids; and introducing the substantially particulate free process gas to a vent line for down stream processing and introducing the second lean stream of solids directly into the standpipe.