Self-cleaning roller screen

US11396032B2 · kind B2 · utility

Assignee

• OUTOTEC (FINLAND) OY · FI

Inventors

• Michael Ströder · Neu-Anspach, DE
• Roberto Valery · Oberursel, DE
• Roger Becker · Calgary, CA
• Siegfried Schimo · Friedrichsdorf, DE
• Gergö Rimaszeki · Oberursel, DE
• Michal Kotrc · Nieder Prauske - Delnje Brusy, DE
• Vincent Siauw · Frankfurt am Main, DE
• Sebastian Lang · Darmstadt, DE

Key dates

• Filing date: Aug 18, 2016
• Grant date: Jul 26, 2022
• Expiry date: Oct 11, 2038

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P10/20
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method for cleaning of a roller screen transporting and screening particles by means of at least three rotating rollers. The rollers are installed in succession at given clearances and arranged transversally in relation to the transport direction of the particles to screen a desired range of particle sizes. At least one roller changes its circumferential velocity and/or its rotational direction over time at defined time intervals for defined time periods such that for this defined time period for at least one pair of neighbored rollers one roller has a higher circumferential velocity than the other and/or both rollers roll in opposite rotational directions.