Patent ID: 6298579
Filing Date: 2001-10-09
Classification: B03B,F26B

Abstract:
A fluidized-bed drying and classifying apparatus having a main body in which a fluidized bed is formed to dry a granular material and to classify the granular material into fine particles and coarse particles said fluidized-bed drying and classifying apparatus comprising:a perforated gas-distributing plate disposed under a fluidized bed forming region in the main body;a wind box having a shape of a hopper and disposed below the perforated gas-distributing plate;a dropped material discharge device connected to a lower end of the wind box to continuously discharge the material dropped into the wind box;a gas supply system connected to the wind box to supply a fluidizing gas that serves as a drying hot gas and a classifying gas into the wind box;a material supply opening portion mounted to the main body to feed the granular material;a discharge chute mounted to the main body to discharge dried coarse particles; anda gas discharge opening portion disposed on an upper part of the main body to discharge an exhaust gas containing fine particles;wherein the gas supply system includes a flow controller to control a classification particle size by controlling a flow rate of the gas supplied into the wind box, and a temperature controller to control a drying degree through an adjustment of a temperature of the gas supplied into the wind box according to the flow rate adjusted by the flow controller.