Patent ID: 8926795
Filing Date: 2015-01-06
Classification: D21C,D21D

Abstract:
1. A method for washing and dewatering a liquid pulp suspension comprising: a. feeding a liquid pulp suspension into a pulp distributor; b. placing a drum inlet attached to the pulp distributor at a location along an exterior drum surface of a drum such that a liquid pulp suspension fed into the pulp distributor and contacting the exterior drum surface through the drum inlet contacts 65% to 75% of the entire surface area of the exterior drum surface, whereby a first displacement wash zone and at least one second displacement wash zone is created in the area of the exterior drum surface contacted by the liquid pulp suspension, wherein the first displacement wash zone has a first end and a second end, wherein said first end comprises a primary nip and said second end of said first displacement wash zone comprises a secondary nip, wherein the at least one second displacement wash zone has a first end and a second end, and wherein the first end is coextensive with the secondary nip and second end of the at least one second displacement wash zone comprises a final nip; c. adding a first volume of wash liquid into the first displacement wash zone adjacent the primary nip; and d. adding a second volume of wash liquid into the second displacement wash zone adjacent the secondary nip.