B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
92/52
B01D 29/62 (2006.01) D21C 9/18 (2006.01)
Patent
CA 1330174
ABSTRACT The present invention relates to a method and apparatus for the continuous discharge of water from suspension, especially from fibrous pulp, whereby pulp is caused to thicken without having the water to be removed through a thick uncontrollably gathered fiber mat. In accordance with the invention the suspension to be thickened is fed into a filtering chamber, the suspension equalizing the consistency differences, the liquid is continuously removed from the suspension and the thickness of the fiber mat being formed on the filter surface is controlled by subjecting said mat to shear stresses. The above described method is realized by an apparatus, in which at lest one of the co-operating surfaces, the filtering surface (8) and its counter surface (10), is provided with means (12) for non-mechanically limiting the thickness of a fiber mat on the filtering surface, whereby a uncontrolled formation of a fiber mat on the filtering surface (8) is prevented.
571538
Henricson Kaj
Makela Mika
Niskanen Toivo
Pikka Olavi
Vikman Vesa
Ahlstrom Machinery Oy
Gowling Lafleur Henderson Llp
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