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US 3,941,650 AGranted
Continuous digester
OwnerAuxilius P. Schnyderinventor
Life of this patent
Estimating the term…
Abstract
A continuous digester in which liquor is drained, at various levels, through a screen into a compartment formed by half rings attached to the interior of the digester. The compartment is provided with rotating vanes, which backwash the screen by pulsing liquid therethrough. The digester includes a lower cone, provided with an impeller and compartment for introducing and circulating liquor for "cold blow" of product.
Claims10
A continuous digester for comprising:
- a vessel;
- means for introducing chips into the upper portion of the vessel;
- means for introducing fresh cooking liquor into said upper portion of said vessel;
- means for withdrawing digested wood chips from the lower part of the vessel;
- and liquor withdrawing means positioned at vertically spaced points in said vessel, each said liquor withdrawing means comprising a circumferential disposed liquor drain compartment in fluid flow communication with the vessel interior;
- a screen positioned between the interior of the vessel and said liquor drain compartment whereby liquor flows from the interior of the vessel through said screen into said liquor drain compartment;
- and screen cleaning means positioned in said drain compartment for circumferential movement thereby backwashing said screen to prevent plugging of said screen.
4 more elements
Dependencies are inferred from the claim text.