EP 3380666 A4 20190724 - BOTTOM SCRAPER FOR A CELLULOSE MATERIAL TREATMENT VESSEL
Title (en)
BOTTOM SCRAPER FOR A CELLULOSE MATERIAL TREATMENT VESSEL
Title (de)
BODENABSTREIFER FÜR EIN CELLULOSEMATERIALBEHANDLUNGSGEFÄSS
Title (fr)
RACLEUR DE FOND POUR CUVE DE TRAITEMENT DE MATIÈRE DE CELLULOSE
Publication
Application
Priority
- SE 1551552 A 20151127
- SE 2016051169 W 20161125
Abstract (en)
[origin: WO2017091138A1] The invention relates to an improved design of the bottom of a treatment vessel facilitating feed out of comminuted cellulosic material reducing the torque load on conventional bottom scrapers. The bottom of the treatment vessel has a constant radius (R1 = R2 = R3), or close to that, and the scraper arms has reduced radial extension, using the slow flow diversion of the flow of comminuted cellulosic material towards outlet. The steeper transition of the wall avoids chip column hanging close to treatment vessel wall and thereby do not necessitates that scraper arms are extended all the way to the wall. In a preferred embodiment are no scraper blades arranged radially outside of the mid-section of the scraper arm.
IPC 8 full level
D21C 7/08 (2006.01)
CPC (source: EP SE)
D21C 7/08 (2013.01 - EP SE)
Citation (search report)
- [A] EP 1869250 A1 20071226 - KVAERNER PULPING TECH [SE]
- [A] WO 2012102650 A1 20120802 - METSO PAPER SWEDEN AB [SE], et al
- [A] EP 1988211 A2 20081105 - ANDRITZ INC [US]
- [A] GB 654738 A 19510627 - CELLULOSE DEV CORP LTD, et al
- See references of WO 2017091138A1
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 2017091138 A1 20170601; EP 3380666 A1 20181003; EP 3380666 A4 20190724; SE 1551552 A1 20170418; SE 539140 C2 20170418
DOCDB simple family (application)
SE 2016051169 W 20161125; EP 16868987 A 20161125; SE 1551552 A 20151127