Bleach system for dissolving chlorine gas into a bleach filtrate

Details Bleach system for dissolving chlorine gas into a bleach filtrate Bleach system for dissolving chlorine gas into a bleach filtrate

1986-08-21

1987-05-05

Alvo, Steve

Paper making and fiber liberation

Apparatus

Digester

162243, 2394273, 239429, 261 16, 261 21, 261 76, 261DIG75, 261DIG76, B01F 304, D21C 912

Patent

active

046629939

ABSTRACT:
A bleach system for blending gaseous chlorine with a paper pulp slurry flow stream by mixing the chlorine with a larger quantity of steam prior to blending the chlorine/steam gas mixture with bleach washer filtrate which serves as carrier water for a multiplied number of gas bubbles entrained in the filtrate. As the cooler filtrate water extracts heat from the mixed gas bubble, the steam constituent condenses to collapse each bubble to a fraction of the original volume thereby providing a larger number of smaller chlorine bubbles than otherwise available from conventional phase mixing injectors.
The mixed phase flow stream of chlorine and filtrate is thereafter blended with the pulp slurry flow stream by shear induced turbulence resulting from a greater injection velocity of the mixed phase stream into the center of the slower moving slurry stream.

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