METHOD AND APPARATUS FOR PUMPING SAWDUST FEED IN A SAWDUST PULPING SYSTEM
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United States of America Patent
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Jun 22, 2017
app pub date -
Dec 21, 2016
filing date -
Dec 21, 2015
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Abstract
A method of producing chemical cellulose pulp from sawdust utilizing a static down-flow retention vessel comprising the steps of continuously pressurizing a flow of sawdust using a progressive cavity pump to produce a pressurized sawdust feed for a treatment vessel, passing the pressurized sawdust feed at super-atmospheric pressure downwardly in the treatment vessel, adding treatment white black liquor to the treatment vessel, and treating the pressurized sawdust feed in the treatment vessel with treatment white black liquor to form a treated sawdust, and discharging treated sawdust from the treatment vessel.
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