Supply of washing liquid in a fractionating multi-stage washer
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United States of America Patent
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Oct 8, 2002
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N/A
app pub date -
Sep 23, 1998
filing date -
Sep 11, 1995
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Abstract
A process for washing pulp including a dilution step, an extraction step and a subsequent displacement step. The process further includes the steps of: diluting the pulp; passing the diluted pulp to the extraction step; developing a first filtrate from the extraction step; passing the pulp from the extraction step to the displacement step; developing a second filtrate from the displacement step; segregating the first and second filtrates; providing the second filtrate to the dilution step; providing a determined minimum volume of the first filtrate needed for the dilution step; and eliminating the remaining volume of the first filtrate from further use in the washing of the pulp.
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