Washing of papermaking pulp stock

Details Washing of papermaking pulp stock Washing of papermaking pulp stock

D - Textiles, Paper

21

C

92/60

D21C 9/02 (2006.01) B01D 33/00 (2006.01) D21C 9/06 (2006.01)

Patent

CA 1255949

- 1 - Abstract: Input pulp stock flows along a passageway defined between a vat and a perforated, filtering, cylindrical wall of a rotating cylinder. A relatively dilute fraction of the input stock is removed from the interior of the cylinder, and a relatively concentrated fraction in the form of a mat is removed from the uprunning cylinder wall at a location above the level of the stock at the down- stream end of the passageway. The invention is character- ised by the introduction of clean dilution water at such downstream end. This water is substantially confined to the downstream end, and is directed through the mat into the interior of the cylinder whereby to enhance the washing of the mat.

466209

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