Method of maintaining uniformity of fibrous material fed to a co

Details Method of maintaining uniformity of fibrous material fed to a co Method of maintaining uniformity of fibrous material fed to a co

1979-01-11

1980-12-16

Bashore, S. Leon

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With testing, sampling or analyzing

73 32R, 162 52, 162 61, D21C 712, D21F 108

Patent

active

042395909

ABSTRACT:
A process for continuously monitoring and controlling a continuous process for digestion of cellulose utilizing a computer which is programmed to determine (1) the mass of wood being fed to the digester from measurements of the density of the wood slurry feed, the density of the liquid and the total flow of slurry, (2) the mass of wood being withdrawn from the digester from measurements of the density of the pulp slurry, the density of the liquor and the total flow of slurry, (3) the correct amount of fresh digester liquor to be added concurrently with the wood feed and (4) amount of water wash and makeup digester liquor to be fed to the reactor. The computer can also be programmed to control the temperature in the reaction zone of the digester.

REFERENCES:
patent: 3822179 (1974-07-01), Chari et al.
Morrison "Changes in Kraft Continuous Digester Instrumentation" Paper Trade Journal; Sep. 1964.
MacDonald et al., Editor "Control Secondary Fiber Structural Board Coating" McGraw-Hill NY 1969, p. 231.
Grant "Computer Applications: Woodlands Through Bleach Plant II" Paper Trade Journal, Jun. 21, 1971.

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