Gas diffuser

Details Gas diffuser Gas diffuser

D - Textiles, Paper

21

H

92/60.1, 8/78.1

D21H 21/32 (2006.01) B01F 5/04 (2006.01) D21C 9/10 (2006.01)

Patent

CA 1300321

ABSTRACT A diffusing unit made up of an elongated cylindrical casing and an elongated gas diffusing tube, having a microporous surface, held axially therein. The casing and tube provide an annular passage for fast moving agitated pulp slurry, receiving masses of gas bubbles from the porous surface. Gas is supplied through a connection leading through the casing to the diffusing tube, downstream of the microporous surface, and the upstream end of the tube is tapered and mounted so as to minimize obstruction to the smooth flow of the slurry in contact with the microporous surface. Apparatus is employed in a method of bleaching, in which bleaching gas is intimately mixed in a cellulose pulp slurry and subsequently reacted with the cellulose.

527165

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