Title:
METHOD AND DEVICE FOR TREATING A FIBROUS SUBSTANCE
Document Type and Number:
WIPO Patent Application WO2005056914
Kind Code:
A3
Abstract:
The invention relates to a device (1) for treating a fibrous substance for producing paper that, in addition to fibers, contains at least water and filling material, in particular, a secondary filler material. The device comprises: a first centrifugal classifying system (10) having a number of stages (11, 12, 13, 14, 15), whereby at least the last stage (15) comprises a branching off for accepted stock (G) and a branching off for rejected stock (S); a separating device (20) connected to the branching off for rejected stock (S) of the first centrifugal classifying system (10) and comprising a separating element (21) as well as a branching off for a fine fraction (F), which contains, in essence, filling material and water, and comprising a branching off for a crude fraction (C), and; a second centrifugal classifying system (30), which is connected to the branching off for the crude fraction (C) of the separating device (20) and which has at least one first stage (31) having a branching off for accepted stock (G) and a branching off for rejected stock (S).
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Inventors:
KLEEMANN WILFRIED (DE)
Application Number:
PCT/EP2004/014302
Publication Date:
November 03, 2005
Filing Date:
December 15, 2004
Export Citation:
Assignee:
NORDLAND PAPIER GMBH (DE)
KLEEMANN WILFRIED (DE)
POTTS MICHAEL (DE)
KLEEMANN WILFRIED (DE)
POTTS MICHAEL (DE)
International Classes:
D21D5/24; (IPC1-7): D21D5/18
Domestic Patent References:
| WO1999024662A1 | 1999-05-20 |
Foreign References:
| DE2349065A1 | 1974-04-18 | |||
| US20020129909A1 | 2002-09-19 | |||
| DE3937279C1 | 1991-04-18 | |||
| EP0422314A1 | 1991-04-17 |
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