DRUM-TYPE VACUUM FILTER Russian patent published in 1996 - IPC

FIELD: chemical industry and other industries; deep dewatering of slime of purification works. SUBSTANCE: filter has drum 1 with filtering surface, trough 2 and cover 3 fitted at clearance 4 relative to drum 1. Sediment unloading device is made in form of screw feeder 7 with chamber 9 in housing 8. Heating elements 5 are mounted in clearance 4 and in housing 8. Filter is provided with air purification unit brought in communication with chamber 9 by means of pneumatic pipe 14 on one side and by means of clearance 4 on other side. Crushed sediment is fed from unloading device to pneumatic pipe 14 where it is entrapped by ascending flow of air heated in calorifer 13. Dispersed material is dried in pneumatic pipe 14 to final content of moisture and then it is fed to cyclone 10. EFFECT: enhanced efficiency. 2 dwg