Patent ID: 8277608
Filing Date: 2012-10-02
Classification: D21C

Abstract:
1. A method for treating pulp in connection with the bleaching of chemical pulp, said method comprising: at least treating the pulp in an ozone, a chlorine dioxide or an alkali stage and washing the pulp thereafter in a washing device having an E wherein the pulp is washed in the washing device using a first washing liquid consisting of the washing liquid filtrate obtained from the washing device, wherein an amount of the washing liquid filtrate in the first washing liquid is in a range of 1.5 t/adt pulp to 3.5 t/adt pulp, thereafter the pulp is washed with a second washing liquid consisting of washing liquid introduced from outside the washing device, wherein an amount of said second washing liquid being such that a dilution factor in the second washing liquid is less than 1 t/adt and a total amount of the first washing liquid and the second washing liquid used in the washing device is such that the dilution factor is over 0 t/adt.