Method for controlling mist and dust in the manufacture and finishing of paper and board by an ion blast wind
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United States of America Patent
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Jan 28, 2003
Grant Date -
N/A
app pub date -
Mar 17, 2000
filing date -
Sep 24, 1997
priority date (Note) -
Expired
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Abstract
A method for controlling particulate matter occurring in the manufacture of paper and board. A web (1) is passed to web treatment equipment (22, 23) wherein at least one treatment step is applied to the web (1) causing the emission of particulate matter (24). In the vicinity of the emission point (21) of the particulate matter are placed at least two electrodes (25, 26) and at least one electrode, called a counter-electrode (26), is at a low potential. At least one electrode (25) is at a potential higher than that of the counter-electrode (26), and the potential difference between the electrodes (25, 26) is made to generate a corona discharge between the electrodes that causes an ion-blast wind toward the electrode (26) of the lower potential, the ion-blast wind transferring particulate matter, which enters the gap between the electrodes, toward the electrode of lower potential.
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