Method and apparatus for evaporating waste liquor produced...

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

D - Textiles, Paper

21

C

92/56

D21C 11/06 (2006.01) D21C 11/10 (2006.01)

Patent

CA 1320865

ABSTRACT Method and apparatus for evaporating waste liquor produced when cooking fibrous material containing cellulose in a continuous digester, in which cooking the heating of the fibrous material to the process temperature is carried out by vapor and in which waste liquor is discharged from the digester whereby when evaporating the waste liquor, which is discharged from the digester, vapor is generated, by which vapor fibrous material is heated instead of fresh steam. Evaporation is preferably carried out in several stages, from which discharge vapor is guided to different levels of the digester.

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