Method for the continuous steam pre-treatment of chips during the production of cellulose pulp
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United States of America Patent
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Jan 3, 2012
Grant Date -
Jun 4, 2009
app pub date -
Nov 25, 2008
filing date -
Nov 30, 2007
priority date (Note) -
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Abstract
The arrangement and method are for the steam pre-treatment of chips during the production of cellulose pulp to avoid the blow-through of gases in the steam pre-treatment vessel. This prevents foul-smelling gases from being released into the atmosphere. Spreader nozzles for the injection of cooling fluid are arranged in the gas phase of the steam pre-treatment vessel. In the event of the risk for blow-through of steam, cooling that is proportional to the risk is activated. It is possible to avoid the emission of gases from the chip bin when interruptions in the process occur, whereby the release of odors into the surroundings can be minimized.
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