Method and apparatus of discharging a disc filter

Details Method and apparatus of discharging a disc filter Method and apparatus of discharging a disc filter

1988-11-01

1990-07-24

Jones, W. Gary

Liquid purification or separation

Plural distinct separators

Filters

210327, 210330, 210331, 210391, 210396, 162380, B01D 3323, B01D 3346

Patent

active

049433725

ABSTRACT:
The present invention relates to a method and apparatus for discharging a disc filter. The method and apparatus are excellent for handling fiber suspensions in the pulp and paper industry. In earlier known means, the filter cake thickened on the filter surfaces of the disc filter is detached by means of water or compressed-air jets and the cake allowed to freely fall to an axial chute disposed below the shaft level of the filter, wherefrom the pulp most usually is transferred by means of a screw conveyor. The pulp, however, easily clogs the inlet opening of the chute, whereby pulp material accumulates in the space between the discs with harmful consequences. The above-mentioned problem is solved by arranging a conveying means (9), preferably a belt conveyor, between and/or adjacent the filter discs (6), onto which conveying means the cakes are allowed to fall freely and wherefrom the belt (9) quickly and in a forced or positive manner transfers the cakes further to a discharge chute (4) disposed on the side of the filter, thus preventing the pulp material from accumulating between the discs.

REFERENCES:
patent: 1283925 (1918-11-01), Salisbury
patent: 3030080 (1962-04-01), Hise et al.
patent: 3959145 (1976-05-01), Lundquist et al.
patent: 4086168 (1978-04-01), Moore
patent: 4321140 (1982-03-01), Luthi

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