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US 4,698,917 AGranted
Rotary drier for drying heat-sensitive products and pharmaceuticals
AssigneeItalvacuum di Ing. P. Debolini & C. S.A.S.
InventorPaolo Debolini
Life of this patent
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Abstract
A vacuum rotary drier comprising a hollow body which rotates about a horizontal axis is provided with supplementary stirring devices. These devices, which are fixed to the walls of the hollow body, include a motor located outside the drying chamber and a stirring implement which rotates at high speed within the drying chamber and serves to break up lumps present in the product to be dried.
Claims4
Rotary vacuum dryer for drying particulate material comprising:
- a fixed support structure (2);
- a hollow body (1) having a double-cone shape which results from the union of two frusta (22a, 22b) across their major bases with the interception of a circular cylindrical connector (23), rotatably supported about a substantially horizontal axis (4) by the fixed support structure (2) and defining a chamber (3) for the product to be dried;
- means (5) for rotating the hollow body (1) about the horizontal axis (4);
- at least two stirring devices including stirring implements (11) located within the chamber (3) to agitate the particulate material, said stirring devices being rotatably supported by a wall (8) of the hollow body (1), the stirring devices being substantially in a plane which contains an axis (24) of the frusta and which is perpendicular to the horizontal axis of rotation (4) of the hollow body (1);
- and
- means (9) for rotating the stirring implements (11) within the chamber (3).
3 more elements
Dependencies are inferred from the claim text.