Transcription of Digester Control in the Kraft Process - Emerson
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Digester Control in the Kraft Process - Emerson
BACKGROUNDThe Kraft paper Process is particularly efficientbecause it involves continuous recycling of raw mate-rials. Wood chips are delignified by harsh chemicals(white liquor) to produce pulp and spent liquor (blackliquor). The spent liquor is later regenerated to whiteliquor in the most important physical parameter of pulpproduction is the Kappa number, which essentiallyindicates how well the chips have been the value of the Kappa number is difficultbecause the original wood chips may differ greatly incomposition and moisture content.
BACKGROUND The Kraft paper process is particularly efficient because it involves continuous recycling of raw mate-rials. Wood chips are delignified by harsh chemicals
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