EP 4031705 A1 20220727 - CLEANING METHOD
Title (en)
CLEANING METHOD
Title (de)
REINIGUNGSVERFAHREN
Title (fr)
PROCÉDÉ DE NETTOYAGE
Publication
Application
Priority
- DE 102019125317 A 20190920
- EP 2020069861 W 20200714
Abstract (en)
[origin: WO2021052652A1] The invention relates to a method for cleaning an impurity-containing fibrous stock suspension (1) which is formed at least partially from waste paper with at least two closed sorters (2, 3, 4, 5) which are arranged in series and in which the fibrous stock suspension (1) which is in each case fed in via an inlet (6) is sorted by way of a screen (7), by an accepted stock stream (8) being conducted through the respective screen (7) and the part which is retained by the screen (7) being discharged as a reject stream (9), the accepted stock stream (8) and the reject stream (9) being conducted directly downstream of the respective sorter (2, 3, 4, 5) via a controllable valve (10, 11), and the reject stream (9) of a first sorter (2, 3) being conducted to the inlet (6) of a second sorter (4) without a reservoir being connected in between. Here, malfunctions are to be reduced by the fact that, in order to flush reject accumulations from the sorters (2, 3, 4, 5) by means of the reject stream (9), the valves (11) of the reject stream (9) of at least two sorters (2, 3, 4, 5) which are arranged in series are opened briefly and at the same time.
IPC 8 full level
CPC (source: CN EP)
D21B 1/32 (2013.01 - EP); D21D 5/02 (2013.01 - CN EP); D21D 5/026 (2013.01 - EP); Y02W 30/64 (2015.05 - EP)
Citation (search report)
See references of WO 2021052652A1
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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2021052652 A1 20210325; CN 114423899 A 20220429; DE 102019125317 A1 20210325; EP 4031705 A1 20220727
DOCDB simple family (application)
EP 2020069861 W 20200714; CN 202080065828 A 20200714; DE 102019125317 A 20190920; EP 20743613 A 20200714