Valmet Ab

Fredrik Holmstrand

Jörgen T Lundberg

Tomas Vikström

A mixing unit () for use in a mixing apparatus () for mixing chemicals in liquid or gaseous state into a fiber suspension, which apparatus comprises a housing () defining a mixing chamber (), a first inlet () for feeding a pulp suspension to the mixing chamber, a second inlet () for feeding treatment media into the mixing chamber, a drive shaft () connected to a drive device () for rotation of the drive shaft in operation, and an outlet () for discharging the mixture of pulp suspension and treatment media, said unit () for mixing being adapted to be installed in the mixing apparatus and comprising a rotor () comprising a rotor shaft () being arranged to be connected to the drive shaft () for, in operation, simultaneous rotation with the drive shaft, at least two rotor bodies () arranged on the rotor shaft (), each having a radial extension, the bodies being arranged to be axially separated from each other along the rotor shaft () and adapted to cooperate so as to form multiple mixing zones. A mixing apparatus comprising the mixing unit.

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Timrå, Sweden

Fredrik Holmstrand