Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With agitation or forced circulation
Patent
1979-08-10
1981-09-15
Bashore, S. Leon
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With agitation or forced circulation
8156, 34135, 162 60, 162 68, 209452, 366186, D21C 102, D21C 702
Patent
active
042895790
ABSTRACT:
PCT No. PCT/SE78/00092 Sec. 371 Date Aug. 10, 1979 Sec. 102(e) Date Aug. 10, 1979 PCT Filed Dec. 11, 1978 PCT Pub. No. WO79/00375 PCT Pub. Date June 28, 1979
A bulk material is treated in a drum rotating in a bulk of the bulk material to be treated. The drum (16, 68) is provided with feeding-in openings (28, 70) in the cylindrical face of the drum. The bulk material tumbles around in the drum and is conveyed towards a discharge part in one end of the drum by means of a worm conveyor in the drum rotating in opposite direction to the drum. A treatment fluid is introduced into the drum through apertures (11a, 85) in the shaft of the worm conveyor. After the fluid has treated the bulk material in the drum it is led away through the same openings (28, 70) as those through which the bulk material is continuously being fed into the drum. Further the fluid advances up into the bulk of bulk material which therethrough also is treated before the material is fed into the drum. The method and the apparatus is particularly intended for treating pulp wood chips, e.g. for presteaming chips and for washing chips. In the former case one or more drums are provided horizontally in a container for the chip material, closely above the bottom of the container. In the latter case the drum is provided slopingly for conveying the chip material up through the container at the same time as the chip material is being washed.
REFERENCES:
patent: 3401085 (1968-09-01), Croon et al.
Alvo Steve
Bashore S. Leon
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