Discharge from pulping vessels without the aid of mechanical agitation
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United States of America Statutory Invention Reg
Stats
-
Oct 7, 1997
Grant Date -
N/A
app pub date -
Sep 18, 1995
filing date -
Sep 18, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A continuous digester discharges pulp without mechanically engaging the pulp, by using one or more discharge transitions with one dimensional convergence and side relief. The transitions may be mounted within a pre-existing digester shell (after removal of the discharge rotor), and supported by a number of braces and/or a skirt shaped like a truncated cone. The operation of a digester, or other continuous vessel, may be controlled by automatically sensing the level of comminuted cellulosic fibrous material in the vessel and automatically controlling the introduction of dilution liquid into the vessel to discharge the material from the vessel in response to the sensing.
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