Method for screening and a screening apparatus
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United States of America Patent
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Aug 11, 2020
Grant Date -
Feb 14, 2019
app pub date -
Feb 23, 2017
filing date -
Mar 16, 2016
priority date (Note) -
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Abstract
The present invention is directed to methods and apparatus for screening a pulp suspension where the pulp suspension is directed to a screening space, where a part of the fibres in the pulp is screened using a drum-type rotor. The residual pulp suspension is then directed to a dilution space where it is mixed with recirculated pulp flow and the pulp suspension in the dilution space will be screened. Resulting preliminary reject flow is directed to a mixing space where it mixes with a dilution flow. The recirculated pulp flow is then directed back to the dilution space.
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