Claims
- 1. An apparatus comprising:
- an external cylindrical casing with vertical axis in which is mounted at least one stationary horizontal circular plate forming the lower limit of a fluidized bed stage, a shaft capable of pivoting on itself being mounted along this axis, said shaft having as many series of radial blades as there are plates, said blades, which define compartments for the material to be dried, displacing the material present on said plate, each plate having a perforated part corresponding to the drying fluid passage zone, a closed part corresponding to a sweating zone and an open part, the material to be dried arriving on a plate on a section of its closed part and then passing onto a perforated part, then onto a closed section for sweating, or alternately over several perforated and closed parts and being at the end of travel, discharged by its open part;
- a means for causing the rotational movement of the shaft; and
- a means for transporting the treatment fluid in the upward direction.
- 2. The apparatus as claimed in claim 1, wherein each plate has a main perforated part in one piece, occupying a variable fraction of the surface of the plate, the open part being inserted in the remaining closed part.
- 3. The apparatus as claimed in claim 1, wherein each plate has alternating perforated regions and closed regions, the open part being inserted in a closed region.
- 4. The apparatus as claimed in claim 1, wherein each plate may be considered as being divided into identical sectors, the open part corresponding to a sector, the number of blades associated with a plate being equal to the number of sectors.
- 5. An apparatus comprising:
- a parallelepipedic casing with vertical axis in which is mounted at least one perforated horizontal plate forming the lower limit of a fluidized bed stage, a blade being capable of moving perpendicularly to said plate from one end to the other thereof while closing or opening, depending on whether it is in one or other of its end positions, an aperture formed in the wall of the casing above said plate, two external lateral hoppers being associated with each plate, each hopper being defined by an external wall common to the whole of the apparatus and by a bottom located in the same plane as said plate and capable of occupying a position adjacent thereto for filling the hopper and sweating of its contents or an externally offset position for discharging the contents of the hopper to the lower stage, a blade perpendicular to the bottom of each hopper being mounted for translational movement between said external wall and the wall of the casing comprising said aperture and being capable of closing this aperture in its corresponding end position;
- a means for moving the blades and the bottoms of the hoppers in translation; and
- a means for transporting the treatment fluid in the upward direction in a single flow.
- 6. The apparatus as claimed in claim 5 wherein the stages are disposed in blocks of at least one stage, these blocks being separated by plates allowing the material to be dried to pass through, the drying fluid being able to communicate from one block to another, either directly in an internal way, or through an external duct in which is located a means of the heat source or heat exchanger type for modifying the temperature of the drying fluid.
- 7. The apparatus as claimed in claim 5 including a dust removal means of the cyclone type disposed at the outlet of the drying fluid.
- 8. The apparatus as claimed in claim 5 wherein said casing comprises at least one inspection trap.
Priority Claims (1)
Number |
Date |
Country |
Kind |
87 00031 |
Jan 1987 |
FRX |
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PRIOR APPLICATION
This application is a division of U.S. patent application Ser. No. 448,686 filed Dec. 11, 1989 now U.S. Pat. No. 5,002,787 which is a continuation of U.S. patent application Ser. No. 140,653 filed Jan. 4, 1988 which is a continuation-in-part of U.S. patent application Ser. No. 139,190 filed Dec. 29, 1987, both now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4503627 |
Schumacher |
Mar 1983 |
|
5040310 |
Huttlin |
Aug 1991 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
448686 |
Dec 1989 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
140653 |
Jan 1988 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
139190 |
Dec 1987 |
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