Method and apparatus of a twin-wire press

D - Textiles – Paper – 21 – F

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Details

D21F 1/80 (2006.01) B30B 9/24 (2006.01) D21F 3/04 (2006.01)

Patent

CA 2583579

The present invention relates to a method for dewatering of a fibre suspension in a twin-wire press (2) , having a lower wire (10) and an upper wire (12), and a first and a second dewatering table (20, 22) , which supports the wires such that a dewatering space (24) is defined by the wires. The wires transports the fibre suspension under the compression of the wires by the dewatering tables, such that the fibre suspension is dewatered and forms a fibre web between the wires. A separate pressing force (F) is applied against one of the wires (12), such that this wire presses the formed fibre web via the second wire (10) against one of the dewatering tables (22) and further dewaters the fibre web. The separate pressing force (F) is adjusted such that a desired dryness of the fibre web leaving the dewatering tables (20, 22) is achieved. The present invention also relates to a twin-wire press.

La présente invention concerne un procédé d'assèchement d'une suspension de fibres dans une presse à double toile (2), possédant une toile inférieure (10) et une toile supérieure (12), et une première et une seconde table d'assèchement (20,22) qui supporte les toiles de sorte qu'un espace d'assèchement (24) soit défini par ces toiles. ces toiles transportent la suspension de fibres sous la compression de ces toiles par les tables assèchement, de sorte que la suspension de fibres soit asséchée et forme une bande de fibres entre les toiles. Une force de pression distincte (F) est appliquée contre l'une des toiles (12) de sorte que cette toile presse la bande de fibres formée via la seconde toile (10) contre une des tables d'assèchement (22) et assèche ensuite la bande de fibres. La force de pression distincte (F) est réglée de sorte qu'un assèchement souhaité de la bande de fibres quittant les tables d'assèchement (20,22) soit effectué. Cette invention concerne aussi une presse à double toile.

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