System and method for operating a pulp mill
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United States of America Patent
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Jul 21, 1998
Grant Date -
N/A
app pub date -
Aug 22, 1996
filing date -
Aug 22, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A pulp mill includes a digester which contains a raw material, a digesting medium, and a source of steam. Oxygen is injected into the steam line, at a point which minimizes exposure of the oxygen to the steam outside of the digester. The oxygen can also be injected directly into the digester. The oxygen speeds the chemical reactions in the digester, allowing the digesting process to be completed with a reduced quantity of chemicals and/or steam, and at a faster rate. The present invention improves the quality of the effluents from a pulp mill, and makes it easier for the operator of the mill to comply with environmental regulations.
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