Method and apparatus for evaporating waste liquor produced when

Details Method and apparatus for evaporating waste liquor produced when Method and apparatus for evaporating waste liquor produced when

1989-01-11

1990-07-31

Hastings, Karen M.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

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

162 42, 162 47, 162240, 162250, D21C 1106

Patent

active

049448404

ABSTRACT:
The present invention relates to a method and apparatus for evaporating waste liquor produced when cooking fibrous material containing cellulose in a continuous pulp digester. In the continuous cooking process, fibrous material is heated to the process temperature by direct or indirect vapor heating in the digester at an increased pressure. The invention especially relates to digesters, in which fibrous material is heated directly with vapor.

REFERENCES:
patent: 1793264 (1931-02-01), Tschuwikowsky et al.
patent: 2747552 (1956-05-01), Kyrklund
patent: 3286763 (1966-11-01), Jacoby
patent: 3299942 (1967-01-01), Jucosy
patent: 3366158 (1968-01-01), Rosenblad
patent: 3445328, Laakso

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