Pressure pulp washer

Details Pressure pulp washer Pressure pulp washer

D - Textiles, Paper

21

C

92/60

D21C 9/02 (2006.01) D21C 9/06 (2006.01) D21D 1/40 (2006.01) D21D 5/06 (2006.01)

Patent

CA 1293403

PRESSURE PULP PRESSURE Abstract of the Disclosure A method of washing a pulp mat on the outside of a permeable rotatable drum mounted in a vat is disclosed. A washing baffle is also mounted in the vat and has a first inside surface spaced from the drum by a narrow gap to provide a narrow annulus extending from its upstream end partially along the outside surface of the drum. A second inside surface is provided downstream from the first inside surface and connected to the first inside surface and extending partially along the outside surface of the drum to its downstream end with the second inside surface spaced from the drum by an enlarged gap to provide an enlarged annulus. The method comprises moving the pulp mat, by rotating the drum, from the upstream end of the narrow gap to the downstream end of the enlarged gap. The mat is then washed with liquid from a first liquid source by flowing the liquid into the upstream end of the narrow gap, along the narrow annulus and through the pulp mat into the drum. The mat is then washed with liquid from a second liquid source by flowing the liquid into the downstream end of the enlarged gap, along the enlarged annulus and through the pulp mat into the drum.

615786

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