Sorter for paper pulp suspensions

Details Sorter for paper pulp suspensions Sorter for paper pulp suspensions

D - Textiles, Paper

21

D

209/105

D21D 5/02 (2006.01) D21F 1/06 (2006.01)

Patent

CA 1268734

ABSTRACT OF THE DISCLOSURE The present invention relates to a sorter comprising a screen in the form of a stationary, rotationally symmetrical wire cage, in the peripheral vicinity of which screening vanes are pivoted, an inlet for feeding a suspension into the cage, a pulp chamber surrounding the cage, and a pulp outlet from the pulp chamber. The invention is characterized by an annular damping chamber, which preferably surrounds the pulp chamber and which is in direct communication with said pump chamber. The damping chamber has an area having a cushion of gas, the pressure of which can preferably be controlled. By this arrangement pressure pulsations, which are caused by the screening vanes pivoted along the wire cage, are damped so that their unfavourable effect on the breast box of a paper machine is reduced.

500566

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