Solid-bowl screw centrifuge
AssigneeGEA Mechanical Equipment GmbH
InventorPoul-Erik Aagaard
Life of this patent
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Abstract
A solid-bowl screw centrifuge has a rotatable drum with cylindrical and conical portions. At least one solid discharge is arranged in the conical portion of the drum. A screw is arranged in the drum and can rotate at a differential speed in relation to the rotatable drum. At least two drum bearings are used for mounting the drum in a housing and at least one screw bearing is used for mounting the screw in the drum. The drum and the screw mounting are designed in the region of the conical portion or the dry zone in such a way that solid matter is transported with the aid of the screw up to a solid-discharge drum cover, which forms the termination of the conical portion in the axial direction of the drum, in order to leave the drum through multiple openings in the solid-discharge drum cover.
Claims17
A solid-bowl screw centrifuge, comprising:
- a housing;
- a rotor rotatably mounted in the housing;
- a rotatable drum having an axis of rotation, wherein the rotatable drum has a cylindrical portion and a conical portion;
- at least one liquid outlet arranged in the cylindrical portion of the rotatable drum;
- at least one solids discharge arranged in the conical portion of the rotatable drum;
- a screw rotatable relative to the rotatable drum at a differential speed and arranged within the rotatable drum, wherein the rotatable drum and screw together form the rotor;
- at least two drum bearings configured to mount the rotatable drum in the housing;
- and
- at least a first screw bearing configured to mount the screw in the rotatable drum,
- wherein the rotatable drum is configured in a region of the conical portion or a drying zone such that solid matter is transported by the screw up to a solid-discharge drum cover, which forms a termination of the conical portion in an axial direction of the rotatable drum, in order to leave the rotatable drum through a plurality of axially aligned openings, which are axially aligned with each other, in the solid-discharge drum cover,
- wherein the plurality of axially aligned openings in the solid-discharge drum cover are located entirely within a smallest inner diameter of the conical portion of the rotatable drum,
- wherein solid-discharge drum cover has a conical portion and the plurality of axially aligned openings are arranged on the conical portion of the solid-discharge drum cover, and
- wherein the solid-bowl screw centrifuge further comprises a cover plate with openings corresponding to the plurality of axially aligned openings of the solid-discharge drum cover is fitted to the conical portion of the solid-discharge drum cover.
Dependencies are inferred from the claim text.