Fines separation system for pellet blender
US4834544A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 1987 |
| Grant date | May 30, 1989 |
| Priority date | — |
| Expiry date | Jul 6, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01F35/181
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A blender for solid particulate material such as plastic pellets which includes an apparatus for separating a fine fraction of material from the plastic pellets. This is accomplished by a separator shell which surrounds a vertical lift pipe in the blender. Gas under pressure is utilized to circulate material through the lift pipe from the bottom of the vessel to the top of the vessel to blend the material. As material is discharged from the vertical lift pipe, the air supplied through the lift pipe for lifting material flows through material dispersed within the separation zone to entrain the fine material and convey it through a vent to a high efficiency dust collector. A by-pass conduit and by-pass control valve are provided to control the velocity of gas through the separation zone to control the size particle of the fine fraction which is separated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.