Continuous digester with a bottom scraper equipped with draining apertures
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United States of America Patent
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Feb 11, 2014
Grant Date -
Dec 5, 2013
app pub date -
Jan 25, 2011
filing date -
Jan 25, 2011
priority date (Note) -
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Abstract
The continuous digester is for producing pulp from comminuted cellulosic material. The digester has a cone diverter on a bottom scraper arranged in the bottom of the digester for assisting in out feed of pulp produced. The cone diverter of the bottom scraper has an upper inclined surface of the cone diverter with an inclination angle in the range 30±10 degrees in relation to the vertical. In order to improve washing performance in the bottom of the digester, especially for overloaded digesters, the upper inclined surface is equipped with draining apertures in fluid communication with a liquid receiving chamber inside the cone diverter. The liquid receiving chamber is connected via a drainage channel to the exterior of the vessel.
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