Method of continuously isothermally cooking of pulp
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United States of America Patent
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Jul 6, 1999
Grant Date -
N/A
app pub date -
May 18, 1995
filing date -
Nov 18, 1992
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to a digester for continuous cooking, under elevated pressure and temperature, of fibre material in a vertical digester (1), where fibre material and cooking liquid are fed into the top of the digester, used cooking liquor is drawn off from at least one digester screen arrangement (1D) between the top and the bottom of the digester, and fibre material is fed out from the bottom of the digester, it being possible to maintain the temperature in the cooking zone immediately above the digester screen arrangement (1B) at essentially the same temperature level as the remaining cooking zone or cooking zones of the digester.
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