Liquid purification or separation – Filter – Movable medium
Patent
1979-04-22
1981-02-03
Granger, Theodore A.
Liquid purification or separation
Filter
Movable medium
B01D 3306
Patent
active
042487161
ABSTRACT:
A rotary drum filter used to form and wash a pulp mat in the paper making process has a cylindrical filter drum with trunnions at its opposite ends mounting the drum for rotation about a central axis. One of the trunnions is hollow and is rotatably connected to an open end of a stationary vacuum pipe for draining filtrate from the drum during its rotation. Packing material provides a fluid seal at the rotatable connection between the vacuum pipe and the hollow trunnion. The hollow trunnion has an inner wall lined with a fiberglass-reinforced plastic material. An outer end portion of the inner wall is recessed to provide a seat for a packing sleeve insert made of an abrasion-resistant material. The inner surface of the packing sleeve insert provides a continuation of the lined inner surface of the hollow trunnion. An outer flange collar of the insert is threadedly fastened to an outer end surface of the hollow trunnion to hold the insert in place. When the packing sleeve insert wears out, it is removed from the trunnion and replaced with a new one.
REFERENCES:
patent: 2884269 (1959-04-01), Remite et al.
patent: 3502375 (1970-03-01), Whittum
patent: 3504802 (1970-04-01), Luthi
patent: 3608987 (1971-09-01), Jordon
patent: 3778881 (1973-12-01), Knapp
patent: 3894899 (1975-07-01), Konopatou et al.
Granger Theodore A.
LaValley Industrial Plastics, Inc.
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