Method and apparatus for treating a cellulosic feedstock
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United States of America Patent
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May 28, 2013
Grant Date -
Feb 4, 2010
app pub date -
Jul 29, 2008
filing date -
Jul 24, 2008
priority date (Note) -
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Abstract
A method and apparatus for pre-treating a cellulosic feedstock are disclosed. Embodiments of the method comprise conveying the cellulosic feedstock through an enclosed volume, adding moisture to the cellulosic feedstock simultaneously at multiple spaced-apart moisture injection points as the cellulosic feedstock travels through the volume, and heating the cellulosic feedstock as it travels through the volume to obtain a heated moistened feedstock. Embodiments of the apparatus comprise a shell defining a treatment chamber having a lower inner surface. The treatment chamber has an inlet and an outlet spaced longitudinally apart from the inlet to define an axial length. A conveyance member is housed within the shell and is configured to sweep the lower inner surface. A plurality of injection ports are provided in at least one of the shell and the conveyance member.
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