Patent ID: 7569120
Filing Date: 2009-08-04
Classification: D21C,D21D

Abstract:
1. A method for storing and treating cellulose pulp having a medium consistency in a range of 8-16% and for converting a vertically standing up-flow tower used for storage or treatment of the pulp, comprising: providing an up-flow tower having an inlet centrally defined therein at a bottom of the tower that is transitioned to a conical inlet part at the bottom of the tower, the tower having an outlet defined therein at a top of the tower, inserting a pipe into the inlet part of the tower, the pipe having an upper open end disposed a first distance (A) from a lower part of the conical inlet part, the first distance (A) being shorter than a total vertical extension (B) of the conical inlet part, feeding cellulose pulp in through the outlet and discharging the cellulose pulp through the inlet so that the up-flow tower is converted to a down-flow tower, and the cellulose pulp forming a stagnation zone around the pipe and in the whole of a lower part of the down-flow tower below the upper end of the pipe.