Method for treating pulp in an indirect heat exchanger in connection with bleaching
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United States of America Patent
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-
Oct 24, 2000
Grant Date -
N/A
app pub date -
Dec 16, 1997
filing date -
Jun 20, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of treating pulp and an apparatus for practicing the method are particularly suitable for the bleaching of medium consistency pulp when bleaching stages of varying temperature are used. Chemical pulp is treated in such a way that the pulp is allowed to flow prior to a bleaching reactor, in the reactor itself, and/or after the reactor, at a velocity of less than 5 m/s through an indirect heat exchanger in order to change the pulp temperature more than 5.degree. C., preferably more than 10.degree. C.
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