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US 4,781,828 AGranted
Filter press with rotor disks
AssigneeBauko Baukooperation GmbH
InventorDieter Kupka
Life of this patent
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AssigneeBauko Baukooperation GmbH
InventorDieter Kupka
Estimating the term…
The invention provides a novel filter press comprising a filter chamber wall adapted to be axially displaced for exposing a plurality of filter units contained in the filter press. A certain clearance is provided between the substantially circular filter units and the interior wall surface of the housing or casing, the latter being sealed only adjacent its ends in cooperation with respective end walls. The sealing surfaces are disposed at locations away from the areas coming into contact with the filtering residues on evacuation and cleaning of the filter chamber. A particularly advantageous embodiment of a rotor for a filter press of this type is composed of rotor disks each comprising two axially displaceable rigid pressure plates which are prevented from being rotated by a hub disk interposed therebetween and non-rotatably mounted on the rotor shaft. The introduction of a pressure fluid through the rotor shaft into a cavity between the two plates permits the plates to be forced apart to thereby squeeze retained liquid from the filter cakes on the adjacent filter frames (FIG. 3).
A filter press comprising a housing provided with a feed liquid inlet and consisting of two support walls and a casing defining an interior cavity of substantially circular cross section, one of said support walls forming an end closure of said cavity and the other support wall supporting an end wall forming another end closure of said cavity, said casing being in sealing engagement with said first named support wall and said end wall, further comprising a plurality of filter units coaxially aligned within said housing and composed each of a filter frame mounted in a mounting structure supported by said support walls independently of said casing, each of said filter frames defining a filtrate chamber covered in a radial plane by a filter medium, a feed liquid chamber being formed between said filter medium and a rotor disk disposed opposite thereto, said rotor disk being fixedly mounted on a hollow shaft which is rotatably supported by said support walls and extends centrally through said housing, and including means for moving the surface of said rotor disk towards said filter medium, and further comprising means for axially displacing said casing with respect to said support walls and said end wall to thereby expose said filter units wherein all position of said casing an annular clearance is existant between said filter units and said casing, said clearance being in continuous communication with all of said feed liquid chambers, said filtrate chambers being in communication with a discharge pipe extending through the interior of the filter press in parallel to said hollow shaft.
A rotor for a filter press, said rotor comprising a hollow shaft to extend through said filter press and having a central bore and a plurality of rotor disks fixedly mounted in said shaft at axial spacings, each rotor disk comprising a hub fixedly mounted on said shaft and two symmetrically disposed rigid pressure plates forming axially displaceable surface elements arranged on said shaft on opposite sides of said hub disk for axial displacement and being biased towards on another by means engaging said pressure plates, means defining at least one variable-volume cavity communicating with the bore of said hollow shaft and being disposed between said pressure plates to urge them from one another upon supply of a pressurized fluid to said cavity so as to force said pressure plates into engagement with filter cakes accumulating on filter media of adjacent filter units disposed adjacent to said rotor disks within said filter press, and further comprising sealing means being provided for defining said cavity in cooperation with said two pressure plates.
A filter press comprising a housing provided with a feed liquid inlet and consisting of at least two support walls and a casing defining an interior cavity of substantially circular cross section, one of said support walls forming an end closure of said cavity and the other support wall supporting an end wall forming another end closure of said cavity, said casing being in sealing engagement with said first named support wall and said end wall, further comprising a plurality of filter units coaxially aligned within said housing and composed each of a filter frame mounted in a mounting structure supported by said support walls independently of said casing, each of said filter frames defining a filtrate chamber covered in a radial plane by a filter medium, a feed liquid chamber being formed between said filter medium and a rotor disk disposed opposite thereto, said rotor disk being fixedly mounted on a hollow shaft which is rotatably supported by said support walls and extends centrally through said housing, and including means for moving the surface of said rotor disk towards said filter medium, and further comprising means for axially displacing said casing with respect to said support walls and said end wall to thereby expose said filter units wherein in all positions of said casing an annular clearance is existant between said filter units and said casing, said clearance being in continuous communication with all of said feed liquid chambers, said filtrate chambers being in communication with a discharge pipe extending through the interior of the filter press in parallel to said hollow shaft.
Dependencies are inferred from the claim text.