EP 1799903 A1 20070627 - METHOD FOR FRACTIONATING AN AQUEOUS PAPER FIBRE SUSPENSION AND HYDROCYCLONE FOR CARRYING OUT SAID METHOD
Title (en)
METHOD FOR FRACTIONATING AN AQUEOUS PAPER FIBRE SUSPENSION AND HYDROCYCLONE FOR CARRYING OUT SAID METHOD
Title (de)
VERFAHREN ZUM FRAKTIONIEREN EINER WÄSSRIGEN PAPIERFASERSUSPENSION SOWIE HYDROZYKLON ZUR DURCHFÜHRUNG DES VERFAHRENS
Title (fr)
PROCEDE POUR FRACTIONNER UNE SUSPENSION AQUEUSE DE FIBRES A PAPIER ET HYDROCYCLONE POUR LA MISE EN OEUVRE DUDIT PROCEDE
Publication
Application
Priority
- EP 2005010064 W 20050917
- DE 102004045823 A 20040922
Abstract (en)
[origin: WO2006032427A1] The invention relates to a method and to a device which is used to fraction aqueous paper fibre suspensions (S). Relatively large centrifugal forces are used, also in suspension components having essentially the same densities, in order to achieve good results. This is achieved by virtue of the fact that the paper fibre suspension (S) entering via the inlet (10) is guided initially in a first annular chamber (4) which narrows in an axial direction (4) and subsequently in a second annular chamber (5) which widens in an axial direction. As a result, good fractionating results can be obtained, in particular, when the fibre material consistency in the inlet area is approximately 0.5 - 2 % and also the necessary mass fluxes are maintained at a relatively low level. Said method can be used, for example, for fractionating fresh cellulose and/or wood pulp. It can also be used in the preparation of used paper, wherein said method is particularly economical.
IPC 8 full level
D21D 5/24 (2006.01); B04C 3/06 (2006.01); B04C 5/107 (2006.01)
CPC (source: EP)
Citation (search report)
See references of WO 2006032427A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
DE 102004045823 A1 20060323; AT E416272 T1 20081215; DE 502005006168 D1 20090115; EP 1799903 A1 20070627; EP 1799903 B1 20081203; ES 2317303 T3 20090416; JP 2008513625 A 20080501; RU 2007110481 A 20080927; WO 2006032427 A1 20060330
DOCDB simple family (application)
DE 102004045823 A 20040922; AT 05790369 T 20050917; DE 502005006168 T 20050917; EP 05790369 A 20050917; EP 2005010064 W 20050917; ES 05790369 T 20050917; JP 2007532813 A 20050917; RU 2007110481 A 20050917