FLUIDIZED BED APPARATUS, IN PARTICULAR FOR GRANULATION OF PULVERULENT SUBSTANCE

摘要

In a container (12) a treatment space (14) for substance (16) is arranged and therebelow a wind chamber (22). The wind chamber (22) is defined upwardly by a circular rotor disc (42) which is rotatable drivably about an upright central axis (A) and comprises at least one opening (44) which is elongated in approximately radial direction and which allows a gas stream (50) from the wind chamber (22) into the treatment space (14). The rotor disc (42) is formed as sole partition between wind chamber (22) and treatment space (14). Associated with the or each opening (44) of the rotor disc (42) is a closure means which is opened in normal operation but is closable for stopping the apparatus. Stationarily arranged above the rotor disc (42) is at least one retaining blade (98) which prevents substance lying on the rotor (40) from rotating with the latter. In each gas stream (50) which has passed through one of the openings (44) distributed over the radial length thereof and rotating therewith on rotation of the rotor (40) nozzles (76) are arranged for spraying the substance (16) in the treatment space (14).