Arrangement for and a method of treating pulp, and a method of modernizing a pulp tower

An arrangement for treating pulp, said arrangement comprising a high-consistency pulp tower (10) having an upstanding tower wall (12), a bottom (22), and a stationary parting member (31, 31″) arranged in the tower, said parting member dividing the tower to an upper part and a bottom part (20), said bottom part defining a so-called dilution zone of said tower (10), at least one agitator (40) arranged in the bottom part (20) for diluting high-consistency pulp, discharge means (60) for diluted pulp arranged in the bottom part (20), and said parting member (31, 31″) and said wall (12) of the tower (10) defining a first cross-sectional flow area, which is smaller than a corresponding cross-sectional flow area below the parting member (31, 31″), characterized in means (36, 42;

• 38, 39;
• 44, 46:
• 48) for diluting pulp arranged at a distance from said wall (12) between said parting member (31, 31″) and said wall (12) of said tower (10) substantially at the level of said first cross-sectional flow area.