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US 4,376,704 AGranted
Vacuum double drum filter
AssigneeKlockner-Humboldt-Deutz Aktiengesellschaft
InventorsWilhelm Otte, Reinhold Winckowski
Life of this patent
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Abstract
A double drum vacuum filter with drums positioned parallel to one another with a gap therebetween and rotating in opposite directions with suction applied within the foraminous drums to remove filtrate from a solid which forms on the surface with tapered extraction tubes within the drum angled at an angle greater than 90.degree. relative to the drum surface and with stripping devices disposed on the downrunning side of the drums below the center thereof.
Claims4
A vacuum double drum filter comprising in combination:
- a pair of parallel porous rotational filter drums in close running relationship forming an upwardly facing working gap between them for receiving material to be filtered;
- means for delivering material to said working gap;
- vacuum extraction tubes within each drum for carrying away filtrate, said tubes having inner ends for discharging to a vacuum source through a central head of each drum and said inner end being located radially displaced from the center of the respective drum so that the tubes are angled in the direction of drum rotation;
- and
- wedge shaped collecting pockets tapered gradually and uniformly from an outer opening to an inner opening with the outer opening against the inner surface of the drums facing the material in the working gap and leading radially inwardly to the inner opening connecting to said tubes,
- said pockets extending at an angle to a radial line from each drum center to the location of the open opening to be angled in the direction of rotation of each drum.
3 more elements
Dependencies are inferred from the claim text.