Centrifugal separator for entraining a separated liquid with minimal air mixture

US5709643A · kind A · utility

Assignee

• Alfa Laval Separation A/S · SE

Inventors

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

Key dates

• Filing date: Mar 22, 1996
• Grant date: Jan 20, 1998
• Expiry date: Mar 22, 2016

Classification

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

Abstract

Centrifugal separator comprising a rotor which inside itself forms an inlet chamber (16), a separation chamber (5) and an outlet chamber (12). The outlet chamber (12) is connected to the separation chamber (5) via a passage (13) through which a liquid separated during operation flows into the outlet chamber (12) and in the same forms a rotating liquid body with a radially inwardly directed free liquid surface (14). The outlet chamber is provided with an outlet (19), which is located radially outside the free liquid surface (14). In the outlet chamber (12) at least two wall elements (22) are arranged fixedly connected to the rotor and arranged to form a channel between themselves in order to during operation entrain the separated liquid into the rotation of the rotor and at the same time admit flow of the same radially outwardly in the outlet chamber (12). To make an effective entrainment possible without a great risk of air admixture the wall elements (22) have a portion, which extends radially between the radial level at which the free liquid surface (14) is located and a level radially outside the outlet (19), and which has a directional component in the circumferential direction…