Method and device for treating a fibrous material web in a long nip pressing unit
AssigneeAndritz Inc.
InventorsAndreas Anzel, Robert Meitner, Paul Richards, Wolfgang Plienegger
Life of this patent
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Abstract
A method for treating a pulp web in a paper or tissue machine with an extended-nip press unit. This extended-nip press unit includes a shoe press roll with a revolving press belt and a backing roll, where the pulp web is dewatered in the extended press nip between the backing roll and the press belt and where the pulp web is carried on the revolving press belt of the press roll after the extended press nip to a transfer fabric that receives the pulp web. The transfer fabric is guided over a stationary transfer device in the transfer area. A corresponding device for treating the pulp web.
Claims20
A method for treating a pulp web (1) in a paper or tissue machine (2) in an extended-nip press unit (3) with a press roll (4) having a rotating press belt (5), and a backing roll (6), the press roll (4) being a shoe press roll, comprising the steps of:
- dewatering the pulp web (1) in an extended press nip (7) between the press belt (5) of the press roll (4) and the backing roll (6) to yield a dewatered pulp web,
- transferring the dewatered pulp web (1) directly to the rotating press belt (5) of the press roll (4) after the extended press nip (7),
- passing the dewatered pulp web (1) from the press belt (5) to a transfer fabric (9) in a transfer area (8), wherein
- the transfer fabric (9) is guided over a stationary transfer device (10) in the transfer area (8).
A press arrangement for treating a pulp web (1) in a paper or tissue machine (2), comprising:
- an extended-nip press unit (3) comprising an extended press nip (7) through which the pulp web (1) is guided, the extended-nip press unit (3) further including a press roll (4) with revolving press belt (5) and a backing roll (6), the press roll (4) being a shoe press roll, wherein
- after the extended press nip (7) of the extended-nip press unit (3), the pulp web (1) is guided directly on the rotating press belt (5) of the press roll (4) to a transfer fabric (9) which receives the pulp web (1) in a transfer area (8), and
- the transfer fabric (9) is guided over a stationary transfer device (10) in the transfer area (8).
Dependencies are inferred from the claim text.