Process and device for treating a pulp web in an extended nip pressing unit
AssigneeAndritz Inc.
InventorsWilhelm Mausser, Andreas Anzel, Harald Weigant, David V. Lange
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Abstract
A process and apparatus for treating a pulp web (9) in a paper or board machine in a pressing unit (29) with one press roll (24) that has a rotating press shell (25) and one opposing roll (23), where the pulp web (9) is dewatered in an extended press nip (26) between the opposing roll (23) and the pressing shell (25) of the press roll (24). The pulp web (9) is carried on the rotating pressing shell (25) of the press roll (24) to a transfer zone (30), where the pulp web (9) is passed from the pressing shell (25) onto a transfer element (31, 27) after leaving the extended press nip (26).
Claims24
A process for treating a pulp web in a paper or board machine in a pressing unit with one press roll that has a rotating pressing shell and one opposing roll, where the pulp web is dewatered in an extended press nip between the opposing roll and a surface of the pressing shell of the press roll, wherein the improvement comprises that the pulp web is carried on the rotating pressing shell of the press roll to a transfer zone, where the pulp web is passed from the pressing shell onto a transfer element after leaving the extended press nip.
A press arrangement of a paper or board machine for treating a pulp web, comprising:
- an extended-nip pressing unit including a press roll with a rotating pressing shell and an opposing roll which together define an extended press nip for the pulp web;
- and a transfer element operatively associated with the press roll for supporting the pulp web after it leaves the extended press nip.
Dependencies are inferred from the claim text.