Patent ID: 6142458
Filing Date: 2000-11-07
Classification: B01F

Abstract:
A mixing system for dispersing a gas into a liquid which comprises an axial flow impeller having blades rotatable about an axis to provide said flow principally along said axis, a member presenting a surface opposing the axial flow from said impeller, said surface extending radially from said impeller and being spaced axially away from said impeller, a sparge releasing gas into a region radially outward of said member in the axial flow from said impeller, said spacing from and said radial extent of said surface with respect to said impeller being sufficiently proximate to said blades across a sufficient radial extent of said blades to turn the axial flow of said impeller into radial flow across said blades of a velocity sufficient to inhibit the collection of gas on said impeller and the flooding thereof by said gas.