D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
D21C 3/24 (2006.01) D21C 7/00 (2006.01) D21C 7/14 (2006.01)
Patent
CA 2149535
The present invention relates to a digester for continuous cooking under raised pressure and temperature of fibre material in a vertical digester (I), where input of fibre material and cooking liquid takes place at the top of the digester, withdrawal of spent cooking liquor is carried out from at least one digester screening arrangement (ID) between the top and the bottom of the digester, and fibre material is fed out from the bottom (1C) of the digester, wherein at least one of said screening arrangements (I, 2) has at least one screen element (2A) of which the main configuration is circular and which preferably is assembled by means of welding, and which is fitted into the digester shell by means of welding.
Backlund Ake
Bellstrom Kenneth
Oulie Finn
Soderqvist Soren
Svanberg Johanna
Fetherstonhaugh & Co.
Kvaerner Pulping Technologies Ab
Metso Fiber Karlstad Ab
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