Method and apparatus for evaporating waste liquor produced when cooking fibrous material containing cellulose
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United States of America Patent
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-
Jul 31, 1990
Grant Date -
N/A
app pub date -
Jan 11, 1989
filing date -
Jan 14, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a method and apparatus for evaporating waste liquor produced when cooking fibrous material containing cellulose in a continuous pulp digester. In the continuous cooking process, fibrous material is heated to the process temperature by direct or indirect vapor heating in the digester at an increased pressure. The invention especially relates to digesters, in which fibrous material is heated directly with vapor.
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