Method of diffusion washing or thickening of pulp

Details Method of diffusion washing or thickening of pulp Method of diffusion washing or thickening of pulp

1985-03-12

1985-12-03

Alvo, Steve

Liquid purification or separation

Processes

Separating

68181R, 162 60, 8156, B01D 3300

Patent

active

045564949

ABSTRACT:
A method for diffusion washing and/or thickening paper pulp having a consistency of 6 to 15%. A number of withdrawal screens and fluid introducing structures are provided supported by spider arms which comprise conduits for introduction of liquid into and withdrawal of liquid from an elongated upright hollow vessel in which the assembly is disposed. The conduit means, with attached screen structures, is reciprocated up and down by a single linear actuator located preferably above the vessel and within the cross-sectional area thereof so that the wall of the vessel need not be penetrated by the conduits. The screens and fluid introducing structures remain stationary with respect to each other during reciprocation. A number of wiper blades, which may be operated by a single linear actuator, are provided at the top of the vessel for moving upwardly flowing pulp into withdrawal conduits surrounding the vessel periphery.

REFERENCES:
patent: 3078703 (1963-02-01), Richter et al.
patent: 3579420 (1971-05-01), Richter
patent: 3599449 (1971-08-01), Richter
patent: 4100069 (1978-07-01), Sherman
patent: 4172037 (1975-10-01), Golston

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