Patent · US Expired

Device for separation of air from flotation slush

US5094674A · kind A · utility

5Cited by

3References

10Claims

0Family size

Assignee

J.M. Voith GmbH · DE

Inventors

Peter Schweiss · Langenau, DE
Hans-Dieter Dorflinger · Heidenheim, DE
Michael Nolte · Goslar, DE

Key dates

Filing date	Mar 19, 1991
Grant date	Mar 10, 1992
Priority date	—
Expiry date	Mar 19, 2011

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB04C2009/007
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A device for separation of air from fiber suspensions of flotation devices which are heavily air- and foam-laden or represent a mixture of fluid and foam features a hydrocyclone whose inlet opening is arranged least 2.5 m below the outlet opening of the flotation device for the air-laden fluid or mixture. The separation section of the hydrocyclone is a slender, truncated cone-shaped body on whose pointed (thin) end the deaerated fluid is withdrawn. In this outlet opening there is a back pressure maintained, so that the inlet opening is not completely covered by the vortex of the fluid, leaving still a sufficiently free entrance cross section for the foam. Above the entrance section of the hydrocyclone a mechanical foam eliminator with a rotor is arranged, the rotor comprising an impeller wheel which is provided with radial blades. A funnel-shaped suction socket feeds the foam-air mixture to the impeller wheel.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.