Oxygen reactor deaeration tank and system

Details Oxygen reactor deaeration tank and system Oxygen reactor deaeration tank and system

1985-04-01

1987-08-04

Alvo, Steve

Paper making and fiber liberation

Apparatus

Digester

55177, 55201, 55204, 162 29, 162 57, 162 65, 162380, D21C 910, D21C 1106, B01D 1900

Patent

active

046844422

ABSTRACT:
A small deaeration tank which may be either at atmospheric pressure on under low pressure or vacuum and a system of operating this tank which allows pulp which has been treated with oxygen to be deaerated before being washed. A closed tank would allow steam or oxygen to be recovered. Preferably it would be the same diameter as an oxygen reactor so that it could be placed on top of the reactor and be supported by the reactor. It would have no moving parts, so there would be no need for motors to be mounted on or near the tank. The deaerator is a small open tank having an inlet pipe, an outlet pipe, and a tangential swirl inducing inlet pipe. The locations and sizes of these pipes provide optimum deaeration. The swirl inducing fluid is the filtrate from the washer after the oxygen bleach.

REFERENCES:
patent: 3421622 (1969-01-01), Wurtmann
patent: 3832276 (1974-08-01), Roymoulik et al.
patent: 3963561 (1976-06-01), Richter
patent: 4209359 (1980-06-01), Sethy
MacGregor "The Deaeration of Paper, Paperboard and Hardboard Stock by the Deculator Process" Appita, vol. 22, No. 6, May 1969, pp. xvii-xxi.
Paper, vol. 184, No. 11, 1975, Dec. 8, 1975, pp. 667-668.
Jacobsson, "Complete Deaeration as a Basic Necessity: The Deculator System," Paper, Apr. 20, 1981, pp. 61-62, 64 and 67.

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