Method and apparatus for dynamic concentration of a suspension

US4283938A · kind A · utility

Assignee

• Klockner-Humboldt-Deutz AG · DE

Inventors

• Wolfgang Epper · Bergheim, DE
• Rupprecht Graf · Cologne, DE

Key dates

• Filing date: Aug 30, 1979
• Grant date: Aug 18, 1981
• Expiry date: Aug 30, 1999

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/2506
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In the dynamic concentration of a suspension, in which the suspension is fed into a filter which has a driven stirring device, and in which the suspension forms a filter cake which is continually remixed by stirring with the suspension being dehydrated and maintained in a liquid state up to a desired degree of concentration, the power consumption of the stirring device is measured, in particular the torque is measured, and the intensity of the stirring motion is controlled in accordance with the measured torque by causing a change in the number of revolutions per minute of the stirring device in response to the torque transgressing an upper limit or a lower limit.