Patent ID: 6139805
Filing Date: 2000-10-31
Classification: F22B,F23C,F23G

Abstract:
A fluidized-bed reactor for oxidizing combustible material containing incombustible material in a fluidized-bed furnace having a fluidized medium therein, comprising:a plurality of fluidizing gas diffusion devices disposed at a bottom of said fluidizing-bed furnace for supplying a fluidizing gas, and for imparting different fluidizing speeds to the fluidized medium in a fluidized bed in said fluidizing-bed furnace to form an upward flow of the fluidized medium in a fluidizing region with a relatively higher fluidizing speed of the fluidizing medium and a descending flow of the fluidized medium in a fluidizing region with a relatively lower fluidizing speed of the fluidized medium; anda plate shaped thermal energy recovery device disposed in said fluidizing region with said relatively lower fluidizing speed of the fluidized medium, said plate shaped thermal energy recovery device having a heat recovery surface extending vertically.