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1. (WO2001038632) METHOD AND DEVICE FOR HANDLING FILLED REJECT FLOWS IN A PAPER OR PAPERBOARD MILL

Pub. No.:    WO/2001/038632    International Application No.:    PCT/FI2000/001022
Publication Date: Fri Jun 01 01:59:59 CEST 2001 International Filing Date: Sat Nov 25 00:59:59 CET 2000
IPC: D21F 1/66
D21H 17/01
Applicants: MEGATREX OY
HUOVINEN, Mauno
VIRTANEN, Hannu
Inventors: HUOVINEN, Mauno
VIRTANEN, Hannu
Title: METHOD AND DEVICE FOR HANDLING FILLED REJECT FLOWS IN A PAPER OR PAPERBOARD MILL
Abstract:
The invention relates to a method for processing sewage which contains coating paste from a paper or board mill with a device operating on the principle of a double action impact mill. The device comprsies a first rotor (11) equipped with blades; a second rotor (12) concentric with the first rotor, equipped with blades and arranged to rotate in a direction opposite to the direction of the first rotor; or a stator concentric with the first rotor and equipped with blades. The sewage is led to a feed opening (14) which opens out to the nave of rotors (11, 12) or to the nave of the rotor and the stator. In the device, the material flow is brought to flow as a flow-off through the blades of the rotors (11, 12) arranged within each other, or of the rotor and the stator arranged within each other. The invention also relates to a device for applying the method.