Liquid purification or separation – Filter – With movable means to compress medium
Patent
1981-12-03
1983-03-22
Therkorn, Ernest G.
Liquid purification or separation
Filter
With movable means to compress medium
210386, 210400, 210406, 100118, 100211, B01D 3304
Patent
active
043774806
ABSTRACT:
Belt 21 on which a residual filter cake has been formed by the action of a suction box (16, FIG. 1) on a slurry, is brought over a filter grid 46 superimposed on a membrane 42 inflation of which causes the filter cake to be compressed upwards against stationary pressure plate 53 for further dewatering. The grid 46 has parallel grooves in its top surface and further parallel grooves in its under-surface, and intersecting with and communicating with those in the top surface, to permit suction to be applied by way of suction pipe 146 and drain duct 45. The belt 21 is intermittently driven, but the arrangement may be such that the belt moves continuously and the grid 46, membrane 42 and pressure plate 53 move in sequence, forwards from a starting position for a certain distance in contact with the belt while applying pressure to the filter cake and then backwards to the starting position out of contact with the belt.
REFERENCES:
patent: 3307704 (1967-03-01), Pashaian
patent: 4008158 (1977-02-01), Davis
patent: 4153550 (1959-05-01), Lautrette
patent: 4203836 (1980-05-01), Hallack
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