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US 10,005,252 B2Granted
Screw press
AssigneeAndritz Inc.
InventorsRoland Kanzler, Rudolf Stadlauer, Johannes Knafl, Wolfgang Magor
Life of this patent
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Abstract
The invention relates to a screw press (1) comprising a shaft (4) and a spiral helix (5) provided thereon, wherein the helix (5) goes over in the inlet region (2) of the screw press (1) into a freely projecting helix (8). It is principally characterized in that a tube (9) is provided in the inlet region (2) of the screw press (1). As a result, on the one hand the screen area can be increased greatly in size, on the other hand the co-rotation of the suspension with the shaft can be reduced or avoided.
Claims17
A screw press comprising:
- a screw including a shaft with helical flight rotatable about an axis;
- a casing shell surrounding the screw between an inlet end of the screw and an outlet end of the screw;
- an inlet casing connected to the casing shell for delivering a suspension to the inlet end of the screw;
- an outlet casing connected to the casing shell for discharging a pressed suspension from the outlet end of the screw;
- wherein
- the inlet end of the screw includes a flight in the inlet casing;
- the flight at the inlet end of the screw freely projects from the screw shaft;
- and
- a screen pipe extends coaxially within the freely projecting flight;
- whereby the freely projecting flight rotates closely around the screen pipe as the screw rotates within the casing shell.
7 more elements
Dependencies are inferred from the claim text.