Patent ID: 7520249

Claim:
A circulating fluidized bed reactor comprising: a reaction chamber having a vertical partition wall forming two independent subchambers that include a combustion subchamber and a cooling subchamber, wherein combustion fluidizing gas is provided to the combustion subchamber to maintain a circulating fluidized bed therein; at least one centrifugal separator that receives flue gas from the combustion subchamber and separates particles from the flue gas; at least one external bed that receives the particles from the at least one centrifugal separator and provides the particles to the combustion subchamber, wherein external bed fluidizing gas is provided to the external bed to fluidize the particles therein, wherein the cooling subchamber cools the external bed fluidizing gas received from the external bed; and a heat exchanger cage that receives the flue gas from the centrifugal separator and the external bed fluidizing gas from the cooling subchamber.