Method and apparatus for treating material having poor thermal conductivity
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United States of America Patent
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Mar 12, 2002
Grant Date -
N/A
app pub date -
Jun 14, 2000
filing date -
Jan 30, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and an apparatus for heating or cooling material having poor thermal conductivity, especially medium-consistency fiber suspensions. The material is directed, substantially as a plug flow, at a velocity below 5 m/s (e.g. 0.1-1 m/s) through an apparatus formed by a flow channel provided with heat exchange surfaces. The flow of the material is throttled at a throttling point by a more than 30% reduction in the cross-sectional area of the channel. After throttling, the material is discharged from the throttling point in such a manner that another portion of the material contacts the heat exchange surfaces.
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