| 摘要 |
A continuous pulp digester (102) having an elongate horizontally aligned pressure vessel (110) through which the wood chips (104) and digesting fluid flow in a forward direction. In a first and second embodiments within pressure vessel there is an inner container defining an elongate chamber or passageway having a square cross-sectional configuration. In a third embodiment the digester chamber is cylindrical. At locations along the digester, there are several pair of liquid flow inlets and outlets which enable filtrate from a pulp washer and a digesting agent to be moved into and across the digesting chamber to flow out the flow outlets. These are recirculated in a net upstream flow pattern toward the outlet end of the digester, and discharged as black liquor at different locations in the digester.
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