MULTI-CHAMBER TYPE FLUIDIZED BED-CARRYING CLASSIFIER

摘要

A multi-chamber fluidized bed classifying apparatus is provided. In the apparatus, a main chamber having a fluidized bed 14 arranged on wind boxes 16, 17 through a perforated gas distributing plate 12 is divided into a drying chamber 13 and a classifying chamber 15 by a partition plate 11. A communication passage 19 is defined under the plate 11. The wind boxes 16, 17 have respective lower ends connected to "falls" discharge devices 29a, 29b, respectively. The wind box 16 is connected to a "processing" fluidization gas supply system for supplying the fluidization gas into the box 16, while the wind box 17 is connected to a "classifying" fluidization gas supply system for supplying the fluidization gas into the box 17. The "classifying" fluidization gas supply system is provided with a flow control unit which adjusts the quantity of gas supplied into the classifying chamber 15 to control the size of classified particles. The "processing" fluidization gas supply system is provided with a control unit; which adjusts the gas quantity and/or the temperature of gas supplied into the drying chamber 13. <IMAGE>