Process and device to control quality parameters in paper, tissue and pulp dewatering plants
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United States of America Patent
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Nov 23, 2004
Grant Date -
Oct 17, 2002
app pub date -
Mar 18, 2002
filing date -
Mar 29, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Apparatus and process for controlling the basis weight cross-profile, the formation, the fiber direction and other quality parameters of a pulp sheet after the headbox in a dewatering plant. The apparatus including at least one suspension feed, at least one distribution device and at least one drainage device for excess suspension from the distribution device, where the distribution device has a distribution chamber and a turbulence-generating chamber made up of a number of pipes adjacent to one another. It is mainly characterized by the two peripheral zones of the headbox, comprising distribution chamber and turbulence-generating chamber, each having a discharge device in the sheet running direction for a partial suspension stream.
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