Centrifugal separator having a device for the transformation of kinetic energy to pressure energy

US5160311A · kind A · utility

Assignee

• Alfa Laval Separation A/S · SE

Inventors

• Claes Inge · Hagfors, SE
• Peter Franzen · Tullinge, SE
• Torgny Lagerstedt · Stockholm, SE
• Leonard Borgstrom · Tyresö, SE
• Claes-Goran Carlsson · Höör, SE
• Hans Moberg · Stockholm, SE
• Olle Nåbo · Tullinge, SE

Key dates

• Filing date: Sep 10, 1990
• Grant date: Nov 3, 1992
• Expiry date: Sep 10, 2010

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B04B1/08
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Centrifugal separator having a discharge device for the transformation of kinetic energy of a liquid rotating in a chamber around a rotational axis to pressure energy. The device comprises an element for the discharge of liquid out of the chamber, which element has a surface (20) surrounding the rotational axis arranged to be so located in the rotating liquid body that liquid flows in a predetermined direction along and in contact with the surface (20). The discharge element forms at least one outlet channel (21), which has an inlet opening (22) located in said surface (20) and which from this inlet opening (22) extends in the flow direction. Seen in the flow direction the inlet opening (22) is delimited by two opposite side edges (23, 24) and a cross edge (25) located downstream of the side edges. To make the energy transformation more efficient the opposite side edges (23, 24) of the inlet opening (22) diverge in said flow direction along a part of an extension of the side edges and at least one of the side edges has such a direction that liquid crossing the same flows into the inlet opening (22).