Method and apparatus for optimizing the liquor-to-wood ratio dur

Details Method and apparatus for optimizing the liquor-to-wood ratio dur Method and apparatus for optimizing the liquor-to-wood ratio dur

1995-02-03

1997-10-21

Drodge, Joseph W.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Continuous chemical treatment or continuous charging or...

162 43, 162237, 162249, D21C 700, D21C 714

Patent

active

056792174

ABSTRACT:
Provided is a method and apparatus which decreases a liquor--to--wood ratio at the top of a continuous digester while increasing a liquor--to--wood ratio in the upstream pre-impregnation vessel. A substantially wood-chip free liquor portion is drawn from the top of the digester through a heater to the bottom of the pre-impregnation vessel through a return conduit. A stream is drawn off the return conduit, upstream of the heater, for transfer to the top of the vessel without mixing with wool chips.

REFERENCES:
patent: 2996422 (1961-08-01), Durant et al.
patent: 3578554 (1971-05-01), Richter
patent: 3814662 (1974-06-01), Starrett
patent: 4123318 (1978-10-01), Sherman
patent: 5080755 (1992-01-01), Backlund
patent: 5529661 (1996-06-01), Backlund
patent: 5536366 (1996-07-01), Marcoccia et al.
patent: 5547012 (1996-08-01), Marcoccia et al.
SE, B, 334809 (Kamyr AB), 3 May 1971 (3 May 1971), p. 4, line 7-line 10, figure 1.

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