Kenneth Hohee Yi

US Patent:

41283430, Dec 5, 1978

Filed:

Dec 5, 1977

Appl. No.:

5/857815

Inventors:

Isaac Moked - New Brunswick NJ
Kenneth C. Yi - Belle Mead NJ
John O. McDonald - Englishtown NJ
Jannan G. Lee - Piscataway NJ

Assignee:

Union Carbide Corporation - New York NY

International Classification:

B01F 1302

US Classification:

366101

Abstract:

Apparatus is disclosed for blending free-flowing granular materials comprising: an outer chamber having walls which converge toward and terminate in outlet means at the base thereof; substantially vertically-positioned fenestrated blending tube means spaced above said outlet means having a plurality of entrance means therein; solid, conveying tube means extending substantially vertically through and coaxial within said blending tube means and defining an annular space therebetween; an entrainment zone positioned between said base of said conveying tube means and the base portion of said chamber; and gas inlet means positioned in said chamber to discharge gas upwardly into and through said entrainment zone toward the base inlet of said conveying tube means; the distance of the point of gas inlet discharge into said entrainment zone from said base of said chamber is defined by the equation: X. ltoreq. L - r Tan. alpha. wherein X is the distance between the base of said chamber and said point of discharge, L is the overall distance between said base of said chamber and said base of said conveying tube, r is the outer radius of said conveying tube and. alpha.