Control scheme for rapid pulp delignification and bleaching
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United States of America Patent
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Apr 7, 1998
Grant Date -
N/A
app pub date -
Jan 27, 1997
filing date -
Mar 3, 1995
priority date (Note) -
Expired
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Abstract
A process control method for adjusting chemical application in response to the pulp brightness and/or lignin content is realized by utilizing a coupled control feedforward, feedback or combination feedforward/feedback control system, wherein brightness measurements are made between successive lignin content measurements and adjustments made to the chemical application in response to a comparison value.
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