Method of continuously treating a fibrous suspension

Details Method of continuously treating a fibrous suspension Method of continuously treating a fibrous suspension

1983-05-27

1984-04-10

Coe, Philip R.

Bleaching and dyeing; fluid treatment and chemical modification

Fluid treatment

Special forms and forming

68181R, 162 60, 162251, D21D 140

Patent

active

044412240

ABSTRACT:
A method and apparatus for effecting washing, bleaching, or thickening, etcetera of paper pulp of the like utilizes stationary screens, yet provides efficient treatment without significant screen clogging. Pulp introduced into the bottom of a cylindrical upright vessel is caused to flow in particular radial segments and channels. Introduction of pulp into all channels of a particular radial segment, extraction of withdrawn liquid from the radial segments, removal of treated pulp from the top of the vessel, and the introduction of treating liquid between the stationary screens, are coordinated so that uniform treatment of the upwardly flowing pulp results.

REFERENCES:
patent: 3088306 (1963-05-01), Richter
patent: 3298209 (1967-01-01), Laakso
patent: 3312352 (1967-04-01), Shiells
patent: 3372087 (1968-03-01), Richter
patent: 3524551 (1970-08-01), Richter
patent: 3704603 (1972-12-01), Richter
patent: 3815386 (1974-06-01), Gullichsen et al.
patent: 3905766 (1975-09-01), Petterson
patent: 4172037 (1979-10-01), Golston
patent: 4375410 (1983-03-01), Richter et al.

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