Paper making and fiber liberation – Apparatus – Digester
Patent
1976-02-09
1978-06-06
Bashore, S. Leon
Paper making and fiber liberation
Apparatus
Digester
68181R, 162237, 162241, 162248, D21C 910, D21C 700
Patent
active
040935116
ABSTRACT:
A method and apparatus for treating cooked fiber pulp as it comes from a continuous digester. The cooked pulp is bleached by intensively mixing the pulp with an oxygen containing gas, reacting the mixture while moving the mixed mass upwardly through a funnel shaped body within a pressurized reactor. The funnel shaped body is open at the upper end whereat the pulp mixture cascades over the side and flows downwardly into a ring chamber area between the reactor shell and funnel body, the pulp thereby forming a pressure barrier to any surplus gas within the reactor. The surplus unreacted gas is removed from the upper portion of the chamber for recycle with fresh pulp from the digestor and added gas. The treated pulp is removed from the lower portion of the ring chamber after passing downward therein.
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Strom, "Improved Chlorination Control by Color Measurement"; Tappi, Nov. 1973, vol. 56, No. 11 162-238.
Alvo Steve
Bashore S. Leon
Kamyr Aktiebolag
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