Method and device for emptying suspension from a pulper

US4634059A · kind A · utility

Assignee

• J.M. Voith GmbH · DE

Inventors

• Theodor Bahr · Heidenheim, DE
• Helmut Thumm · Heidenheim, DE
• Walter Musselmann · Heidenheim, DE

Key dates

• Filing date: Mar 21, 1984
• Grant date: Jan 6, 1987
• Expiry date: Mar 21, 2004

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/64
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

In a pulping apparatus including a pulper with a rotor near the bottom therein, the pulper having a sluice outlet at the bottom for acceptable pulp suspension. Above the rotor at a corner of the pulper is a second outlet for suspension and dirt. A conduit leads from the second outlet to a horizontally oriented withdrawal apparatus chamber having a suspension agitating rotor at the end of the chamber opposite the entrance for pulp thereinto. A tangential outlet from the withdrawal apparatus chamber leads to a rotary, perforated sorting drum which permits exit of acceptable suspension and which has a rejected suspension and dirt outlet. A valve in the inlet to the withdrawal apparatus chamber is periodically and cyclically opened to permit periodic replacement of the suspension in the withdrawal apparatus chamber, and the suspension which has been agitated in the withdrawal apparatus chamber then moves to the sorting drum.