Feeding cellulose material to a treatment vessel

Details Feeding cellulose material to a treatment vessel Feeding cellulose material to a treatment vessel

B - Operations, Transporting

01

D

B01D 29/35 (2006.01) D21C 7/06 (2006.01) D21C 9/18 (2006.01)

Patent

CA 2344845

A feed system for a cellulose pulp treating vessel (such as a continuous digester) is not limited by the required L/W ratio of the pump feeding a wood chip slurry to a high pressure transfer device, the feed system may be kept at a low temperature to minimize flashing of liquid into steam, and a return conduit from the treatment vessel to the transfer device high pressure inlet may be eliminated. Some of the liquid is removed from the slurry just before the low pressure inlet to the transfer device, and/or just after the high pressure outlet, to reduce the L/W ratio of the slurry by at least 0.25, e.g. from 3.0:1 to 2.25:1 just before the low pressure inlet, and from 7.0:1 to 5.0:1 substantially immediately after the high pressure outlet.

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