EP 0422314 B1 19940413 - A method and device for the production of cellulose pulp of improved quality.
Title (en)
A method and device for the production of cellulose pulp of improved quality.
Title (de)
Verfahren und Vorrichtung zur Herstellung eines Cellulosebreis von verbesserter Qualität.
Title (fr)
Procédé et dispositif de production d'une dâte cellulosique de qualité améliorée.
Publication
Application
Priority
EP 89850341 A 19891010
Abstract (en)
[origin: EP0422314A1] In a process and a device, a cellulose suspension of thin consistency, the consistency and flow rate of which is known, is conducted to the suction side of a main pump (4), to the pressure side of which there are coupled in sequence a first multi-hydrocyclone unit (6) for cleaning out heavy impurities, a second multi-hydrocyclone unit (7) for cleaning out light impurities, and a headbox (8) for a wet machine or paper machine (9). This provides, on one hand, cleaning and pulp or paper production uninterrupted by intermediate storage, and on the other hand a thickening of the pulp in the second multi-hydrocyclone unit from a suitable consistency for cleaning to a thicker consistency suitable for spreading on a wire or the like.
IPC 1-7
IPC 8 full level
B04C 5/24 (2006.01); D21D 5/00 (2006.01); D21D 5/18 (2006.01); D21D 5/24 (2006.01); D21F 1/66 (2006.01)
CPC (source: EP)
D21D 5/00 (2013.01); D21D 5/24 (2013.01); D21F 1/66 (2013.01)
Designated contracting state (EPC)
AT BE CH DE ES FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0422314 A1 19910417; EP 0422314 B1 19940413; AT E104382 T1 19940415; BR 9006945 A 19911008; CA 2042366 A1 19910411; CA 2042366 C 19950704; DD 296722 A5 19911212; DE 422314 T1 19910725; DE 68914666 D1 19940519; DE 68914666 T2 19940818; ES 2023626 A4 19920201; ES 2023626 T3 19940701; JP H04502188 A 19920416; JP H0781240 B2 19950830; NO 178348 B 19951127; NO 178348 C 20010305; NO 912197 D0 19910607; NO 912197 L 19910607; WO 9105912 A1 19910502
DOCDB simple family (application)
EP 89850341 A 19891010; AT 89850341 T 19891010; BR 9006945 A 19901009; CA 2042366 A 19901009; DD 34316990 A 19900731; DE 68914666 T 19891010; DE 89850341 T 19891010; ES 89850341 T 19891010; JP 50029490 A 19901009; NO 912197 A 19910607; SE 9000648 W 19901009