APPARATUS FOR CLEANING GRANULAR MATERIAL Russian patent published in 1999 - IPC

FIELD: equipment for cleaning granular material with air flow. SUBSTANCE: apparatus has pneumatic separating channel 2, air supplying channel 3 communicated with lower part of channel 2, air flow rate regulator 4 mounted in channel 3, cross-flow fan 5 for communicating upper part of channel 2 with settling chamber 6, charging window 7, granular material mixture discharge branch pipe 8 positioned in lower part of channel 2, light fraction discharge device 9 positioned in lower part of settling chamber 6, and exit channel 10 with baffle-type grid 11 mounted in its upper part. Exit channel 10 is disposed between charging window 7 and channel 2 and is communicated with channel 2. Air supplying channel 3 and channel 2 are inclined toward charging window 7. Gates are positioned in charging window 6 and on wall between channel 2 and exit channel 10. Rotating cylindrical screen 16 is mounted within exit channel 10 and provided with feeding chamber 17 and discharge device 18. Inclined guiding surface 19 is positioned above cylindrical screen 16. Lower edge of guiding surface 19 is disposed above upper part of screen 16 at side adjacent to channel 2. EFFECT: increased efficiency and enhanced reliability in operation. 1 dwg