Apparatus for the thickening of fiber suspensions
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United States of America Patent
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Jul 27, 2004
Grant Date -
N/A
app pub date -
Mar 21, 2001
filing date -
Sep 23, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention relates to the thickening of pulp suspensions. A low consistency pulp suspension is fed to a pre-thickener (10) through an inlet conduit (18). A layer of thickened pulp, formed on a filter surface (22), is pushed along the filter surface by a cleaning member to the discharge end of the pre-thickener and is discharged through the outlet (20). The cleaning member comprises a rotating shaft (30) on which shaft at least one screw thread (32) is fixed so as to leave a free space between the shaft and the screw thread. Essentially non-thickened pulp is allowed to flow through the apparatus via this space.
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