Process and device for separating particles in a fluid especially for the cleaning of the suspensions handled in the paper industry
US4443331A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 20, 1981 |
| Grant date | Apr 17, 1984 |
| Priority date | — |
| Expiry date | Mar 20, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB04C2009/005
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process and device for selectively separating particles from a suspension is disclosed. The process involves: introducing the suspension into a rotating separation chamber in which the flow is regulated so that the angular velocity of the suspension is maintained slightly higher than the angular velocity of the wall of the chamber. The bulk of the flow of the suspension treated is removed from the separation chamber from a peripheral area. The following fractions are removed separately, simultaneously, and if necessary continuously. The heavy fraction is removed from a zone near of the sidewall; the light fraction is removed from a zone nearer of the longitudinal axis of the chamber, than the heavy fraction outlet and if desired, an intermediate fraction may be removed from at least one separate intermediate zone between the light fraction outlet and the heavy fraction outlet. The apparatus comprises a separation chamber having a longitudinal axis, sidewalls and two ends; inlets through the first end for introducing suspension and auxiliary fluid; rotating means for deviating suspension and auxiliary fluid towards the sidewalls outlets for the heavy and the intermediate fractions…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.