Patent ID: 8052839
Filing Date: 2011-11-08
Classification: D21C

Abstract:
1. An apparatus for treating pulp, said apparatus comprising: at least one liquid-permeable surface moving about a shaft, and onto said surface a pulp layer is formed, wherein the at least one liquid-permeable surface includes a first pulp treatment section and a second pulp treatment section offset from the first pulp treatment section, and wherein the first and second pulp treatment sections rotate simultaneously about the shaft; a feeder to feed pulp to the apparatus for treatment on the liquid-permeable surface; an internal barrier dividing the first pulp treatment section and the second pulp treatment section; the first treatment section receiving from the feeder a first type of pulp and the second treatment section receiving from the feeder a second type of pulp different from the first type, wherein the first type of pulp is supplied to the feeder from a first pulp treatment stage in a pulping system and the second type of pulp is supplied to the feeder from a second pulp treatment stage in the pulping system, and a pulp discharge to discharge treated pulp from the apparatus, wherein the pulp discharge discharges the first type of pulp after treatment separately from discharging the second type of pulp after treatment, and a filtrate discharge to discharge filtrate flowing through the liquid-permeable surface from the apparatus.