Method to displace a digester from both ends

Details Method to displace a digester from both ends Method to displace a digester from both ends

1991-05-29

1992-01-14

Hastings, Karen M.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With regeneration, reclamation, reuse, recycling or...

162 52, 162 41, D21C 700, D21C 708

Patent

active

050807579

ABSTRACT:
An apparatus and method for use in a batch digesting process to quantitatively displace fluids in the digester by pumping into the digester under pressure a first volume of displacing fluid at the upper end and a second volume of displacing fluid at the lower end of the digester. Displaced fluids are collected and removed form the digester near the midline between the top and the bottom of the digester.

REFERENCES:
patent: 2179796 (1939-11-01), Morterud
patent: 3881986 (1975-05-01), Backlund
patent: 4248662 (1981-02-01), Wallick
patent: 4578149 (1986-03-01), Fagerlund
patent: 4690731 (1987-09-01), Hartler et al.
Abstract Bulletin of the Institute of Paper Chemistry, vol. 53, No. 8, Feb. 1983, p. 978.

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