Apparatus for treating pulp
AssigneeA. Ahlstrom Corporation
InventorsKaj O. Henricson, Seppo K. Kokkonen, Olavi E. Pikka, Harri T. Qvintus, Erkki A. Ruuskanen, Erkki E. Savolainen
Life of this patent
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Abstract
An apparatus for treating, e.g., washing or filtering, fiber suspensions having a consistency of 8-20%, the apparatus including at least on rotatable filtering surface, an arrangement for feeding the suspension to a treatment region of the apparatus, and an arrangement for discharging the suspension from the treatment region, the feeding arrangement including at least one pressure chamber for fluidizing the suspension, at least one inlet duct for introducing the suspension to the chamber, and at least one feed duct for transferring the suspension from the pressure chamber to the treatment region.
Claims12
An apparatus for treating fiber suspensions having a consistency of 8-20% , comprising:
- at least one rotatable filtering surface;
- a stationary counter surface, said at least one filtering surface and said stationary counter surface being arranged so as to form a treatment zone therebetween;
- means for feeding said suspension to the treatment zone, said feeding means including at least one pressure chamber in which said suspension is fluidized, at least one inlet duct positioned for introducing said suspension to said at least one pressure chamber, and at least one feed opening positioned for transferring said suspension from said at least one pressure chamber to the treatment zone;
- means for fluidizing said suspension positioned in said at least one pressure chamber so as to subject said suspension to a strong shear force field and to disrupt any fiber-to-fiber bonds;
- and
- means for discharging said suspension from said treatment zone.
An apparatus for treating suspensions of the paper and pulp industry having a consistency of 8-20%, comprising:
- at least one rotatable filtering surface;
- a stationary counter surface, said at least one filtering surface and said stationary counter surface being arranged so as to form a treatment zone therebetween;
- means for feeding said suspension to the treatment zone;
- and
- means for discharging said suspension from said treatment zone, said discharging means including a screw conveyor having a discharge end and a centrifical pump having a suction opening arranged immediately adjacent to said discharge end of said screw conveyor so as to feed said suspension from said screw conveyor directly to said suction opening.
An apparatus for treating fiber suspensions have a consistency of 8-20%, comprising:
- at least one rotatable filtering surface;
- a stationary counter surface, said at least one filtering surface and said stationary counter surface being arranged so as to form a treatment zone therebetween;
- means for feeding said suspension to the treatment region, said feeding means including at least one pressure chamber in which said suspension is fluidized, at least one inlet duct positioned for introducing said suspension to said chamber, and at least one feed duct positioned for transferring said suspension from said at least one pressure chamber to the treatment zone, a narrowest measure of said at least one feed duct being significantly smaller than the diameter of said at least one pressure chamber;
- means for fluidizing said suspension positioned in said at least one pressure chamber so as to subject said suspension to a strong shear force field and to disrupt any fiber-to-fiber bonds;
- and
- means for discharging said suspension from said treatment zone.
Dependencies are inferred from the claim text.