Centrifuge with partial wear resistant basket
First Claim
1. A screen basket for use with a solid-liquid separating centrifuge, the basket having a first end, a second end, an inner surface and a plurality of apertures, the screen basket comprising:
- a first screen section disposed proximate to the first end, the first screen section formed from a plurality of wear resistant elements having a constituent wear resistant property and configured and arranged within the first screen section so as to define a plurality of slots in fluid communication with respective ones of the apertures; and
a second screen section disposed proximate to the second end and joining the first screen section, the second screen section formed from a plurality of wire members having a constituent wear resistant property and configured and arranged within the second screen section so as to define a plurality of channels in fluid communication with respective ones of the apertures,wherein the constituent wear resistant property of the wire members, which form the second screen section, is less than the constituent wear resistant property of the wear resistant elements, which form the first screen section.
1 Assignment
0 Petitions
Accused Products
Abstract
An improved screen basket for use with a centrifuge includes two adjoining screen sections. The first screen section is formed from a wear resistant material and is located proximate to the point at which slurry is introduced into the basket. The length of the first screen section is chosen so that the majority of potential wear caused by the abrasive slurry occurs within the first section of the basket. The second screen section is preferably formed from less expensive materials, such as steel wedge wire. The second screen section smoothly joins the first screen section and provides for further dewatering or separation of the accelerated slurry so that a dry cake is produced by the centrifuge.
32 Citations
37 Claims
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1. A screen basket for use with a solid-liquid separating centrifuge, the basket having a first end, a second end, an inner surface and a plurality of apertures, the screen basket comprising:
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a first screen section disposed proximate to the first end, the first screen section formed from a plurality of wear resistant elements having a constituent wear resistant property and configured and arranged within the first screen section so as to define a plurality of slots in fluid communication with respective ones of the apertures; and a second screen section disposed proximate to the second end and joining the first screen section, the second screen section formed from a plurality of wire members having a constituent wear resistant property and configured and arranged within the second screen section so as to define a plurality of channels in fluid communication with respective ones of the apertures, wherein the constituent wear resistant property of the wire members, which form the second screen section, is less than the constituent wear resistant property of the wear resistant elements, which form the first screen section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A screen basket for use with a solid-liquid slurry separating centrifuge, the basket comprising:
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a feed introduction point at which discrete streams of the slurry are received within the basket; a solid wall section disposed at the feed introduction point, the solid section formed from a wear resistant material and configured to smooth out the discrete streams of slurry; and a separating section smoothly joining the solid section, the separating section including a plurality of screen elements configured to separate the liquid phase of the slurry from the solid phase. - View Dependent Claims (21)
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22. A screen scroll centrifuge for use in separating a solids-liquid slurry, the screen scroll centrifuge comprising:
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A. a basket rotatably mounted within the centrifuge, the basket having a first end, a second end, an inner surface and a plurality of apertures and comprising; a first screen section disposed proximate to the first end, the first screen section formed from a plurality of wear resistant elements having a constituent wear resistant property and configured and arranged within the first section so as to define a plurality of slots in fluid communication with respective ones of the apertures; and a second screen section disposed proximate to the second end and joining the first screen section, the second screen section including a plurality of wire members having a constituent wear resistant property and configured and arranged within the second section so as to define a plurality of channels in fluid communication with respective ones of the apertures; B. a scroll conveyor rotatably disposed coaxially within the basket having one or more conveyor blades with a tip positioned proximate to the inner surface of the basket; C. means for rotating the basket and the scroll conveyor about their common axis in the same direction at a differential speed; and D. means for feeding the solid-liquid slurry to the centrifuge so that the slurry enters the basket at the first section, wherein the liquid portion of the slurry passes through the slots of the first section and the channels of the second section and the solids portion is retained on the inner surface of the basket and is conveyed toward the second end by the one or more conveyor blades of the scroll conveyor, further wherein the constituent wear resistant property of the wire members, which form the second screen section, is less than the constituent wear resistant property of the wear resistant elements which form the first screen section. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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Specification