Liquid treatment of and liquid extraction on a paper pulp

Details Liquid treatment of and liquid extraction on a paper pulp Liquid treatment of and liquid extraction on a paper pulp

D - Textiles, Paper

21

C

92/60

D21C 9/02 (2006.01) D21C 9/18 (2006.01)

Patent

CA 1311640

19 ABSTRACT OF THE DISCLOSURE It is desirable to be able to treat medium consistency (e.g. about 8-12% by weight) paper pulp suspensions with treatment liquid (e.g. a wash liquid), and to thicken the pulp to about 30-50% consistency at the same time. A moving (e.g. rotating) channel is defined by a root wall and upstanding side walls -- some or all of which are perforated -- and treatment liquid is introduced by an arcuately elongated distributor with perforated side walls into the center of the pulp within the channel, filtrate flowing out through the perforated walls. A pivoted wall portion of the stationary housing of the treatment device restricts outflow of the thickened pulp cake from the device, the cake flowing between a doctor blade and the pivoted wall portion.

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