EP 3606636 A4 20210106 - PRESSURIZED DISC FILTER FOR CAUSTICIZATION LIQUORS CONTAINING LIME MUD
Title (en)
PRESSURIZED DISC FILTER FOR CAUSTICIZATION LIQUORS CONTAINING LIME MUD
Title (de)
DRUCKBEAUFSCHLAGTER SCHEIBENFILTER FÜR KAUSTIFIZIERUNGSFLÜSSIGKEITEN, DIE KALKSCHLAMM ENTHALTEN
Title (fr)
FILTRE À DISQUE SOUS PRESSION POUR LIQUEURS DE CAUSTIFICATION CONTENANT DE LA BOUE DE CHAUX
Publication
Application
Priority
- SE 1750424 A 20170407
- SE 2018050354 W 20180404
Abstract (en)
[origin: WO2018186795A1] The invention relates to an improvement in pressurized disc filters used for the filtering of causticization liquors containing lime mud particles. According to the inventive method and design, the liquor level in the vat of the disc filter is raised above the rotating shaft of the disc filter, thereby reducing the power rating in compressors used to pressurize the filter. By applying an operating pressure that lies 1-2 bar higher than conventional pressurized disc filters used in the causticization field, sufficient dryness of the lime mud can still be obtained, and the pressure losses through the precoat are substantially reduced.
IPC 8 full level
B01D 33/21 (2006.01); D21C 11/00 (2006.01); D21C 11/04 (2006.01)
CPC (source: EP SE)
B01D 33/21 (2013.01 - EP SE); B01D 33/807 (2013.01 - EP); B01D 33/808 (2013.01 - EP); B01D 33/82 (2013.01 - EP); D21C 11/00 (2013.01 - EP SE); D21C 11/04 (2013.01 - EP SE)
Citation (search report)
- [XI] WO 2011078749 A1 20110630 - METSO PAPER SWEDEN AB [SE], et al
- [A] WO 9910074 A1 19990304 - KVAERNER PULPING AS [NO], et al
- [A] WO 2009072978 A1 20090611 - METSO FIBER KARLSTAD AB [SE], et al
- [AD] WO 2005116329 A1 20051208 - KVAERNER PULPING TECH [SE], et al
- [AD] WO 2017007417 A1 20170112 - VALMET OY [SE]
- [A] WO 9816292 A2 19980423 - BAKER HUGHES INC [US]
- [A] DE 3540336 A1 19860528 - HEDEMORA VERKSTAEDER AB [SE]
- [A] WO 02063095 A1 20020815 - KVAERNER PULPING TECH [SE], et al
- See references of WO 2018186795A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2018186795 A1 20181011; BR 112019019801 A2 20200422; CL 2019002845 A1 20191227; CN 110475596 A 20191119; EP 3606636 A1 20200212; EP 3606636 A4 20210106; SE 1750424 A1 20180925; SE 540553 C2 20180925
DOCDB simple family (application)
SE 2018050354 W 20180404; BR 112019019801 A 20180404; CL 2019002845 A 20191004; CN 201880023050 A 20180404; EP 18780721 A 20180404; SE 1750424 A 20170407