Sealing arrangement for a pulp dewatering arrangement
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United States of America Patent
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Oct 14, 2003
Grant Date -
N/A
app pub date -
Mar 6, 2002
filing date -
Jun 18, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The arrangement is for washing and dewatering a fiber pulp suspension. The arrangement comprises two hollow, circular-cylindrical screen members that have evacuation chambers arranged inside the screen members for leading off liquid. The screen members rotate counter to each other to form a nip. At least one of the screen members is arranged in a trough that partially encloses the jacket of the screen member and, in the direction of rotation of the screen member, converges towards the jacket of the screen member. A sealing arrangement for a pulp head box distributes the pulp onto the jacket surface of the screen members. By forming a progressively decreasing gap B-A at the pulp head box counter to the rotation of the screen member, a simple self-sealing of the pulp suspension can be obtained which allows fiber residues to be returned to the dewatering zone.
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