Method and apparatus for separation using fluidized bed
Patent
·
OSTI ID:5466171
This patent describes an apparatus for using a fluidized bed to effect separation of articles into a float fraction of a mixture made up of articles generally having a first density and a sink fraction of the mixture made up of articles generally having a second density that is greater than the first density. The apparatus comprising: an inclined channelization means having input and output ends and being otherwise enclosed along the length of the sides and bottom thereof so as to form a continuous channel for containing the fluidized bed and for enabling the fluidized bed to flow under the influence of gravity and without interruption from the input end along the length of the channelization means and out through the output end of the channelization means; medium recirculation means for supplying to the input end of the channelization means a fluidization medium from which to create the fluidized bed. The medium recirculation means laterally encircling a substantial portion of the channelization means, including the output end of the channelization means so as to collect fluidization medium as the fluidized bed exits from the output end, the medium recirculation means lifting and returning to the input end of the channelization means the fluidization medium thus collected, pneumatic means for forcing air upwardly through the fluidization medium in the channelization means to create the fluidized bed from the fluidization medium; and mixture feed means for supplying the mixture of articles to the input end of the channelization means for entrainment in the fluidization bed throughout the length thereof whereby the separation of the float fraction from the sink fraction is effected as the fluidized bed exits the output end.
- Assignee:
- NOV; NOV-89-081047; EDB-90-000003
- Patent Number(s):
- US 4865722
- Application Number:
- PPN: US 7092030A
- OSTI ID:
- 5466171
- Country of Publication:
- United States
- Language:
- English
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