Continuous thermal treatment of bulk material
US7350318B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2004 |
| Grant date | Apr 1, 2008 |
| Priority date | — |
| Expiry date | Mar 10, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/88
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a device for continuous heat treatment of granulated materials, especially to the crystallization of polymer granulate, such as polyethyleneterephthalate (PET) for example. The device comprises several adjacent fluidization chambers respectively provided with a sieve plate through which a fluidization gas used to fluidize the granulate can be insufflated into the respective chamber from below via a gas inlet, the gas being able to escape via a gas outlet in the top area of the device. The first chamber takes up the greater part of the overall volume of all chambers and neighboring chambers are, respectively, fluidically connected by product throughflow openings in the separating walls arranged therebetween. The granulated material can be guided through several adjacent fluidization chambers, the absolute filling level of the fluidized granulating material in the first chamber being at least as high as the absolute filling level of the other adjacent chambers disposed downstream therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.