Fluidized bed apparatus
US4736895A · kind A · utility
Inventor
Key dates
| Filing date | Aug 8, 1986 |
| Grant date | Apr 12, 1988 |
| Priority date | — |
| Expiry date | Aug 8, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF26B3/092
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A substantially spherical vessel (10) the lower part (16) of which opens into a cylindrical wall (36) of a dish (24) arranged below the vessel (10) is provided for mixing, drying, granulating, pelleting, varnishing, and/or coating pulverous or granular material (30). An immersion tube (40) protrudes from above into the vessel (10), being immersed in the dish (24) such that a narrow annular space (42) is defined in the dish. The annular space (42) has a mean diameter (D42) which conforms to the mean diameter of the maximum free ring cross section in the equatorial plane of the vessel (10). In the upper area of the vessel (10) a diverting shield (44) is arranged rotationally symmetrically around the immersion tube (40). The diverting shield (44) vaults symmetrically over the annular space (42). Any gas introduced from above into the dish (24) is deflected in upward direction, flowing through the annular space (42) into the vessel (10) where the material (30) is fluidized in two concentric toroidal vortices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.