System and method for reclaiming rejects in sulfite pulping
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United States of America Patent
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Nov 4, 2014
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N/A
app pub date -
Aug 21, 2013
filing date -
Aug 21, 2012
priority date (Note) -
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Abstract
Systems and methods are provided for refining and reclaiming rejects in a sulfite pulping process. Wood chips and sulfite cooking liquor are provided to a digester for delignification. The slurry obtained from the digester is screened to obtain a reject portion containing sulfite rejects. The sulfite rejects are disintegrated in a refiner, such that the rejects are refined to a freeness suitable for digestion in a subsequent re-cooking step. Refined rejects are then returned to the digester for re-cooking with wood chips.
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