EP 1926545 A1 20080604 - METHOD AND DEVICE FOR MICROFILTERING SOLID SUBSTANCE-CONTAINING LIQUIDS
Title (en)
METHOD AND DEVICE FOR MICROFILTERING SOLID SUBSTANCE-CONTAINING LIQUIDS
Title (de)
VERFAHREN UND VORRICHTUNG ZUR MIKROFILTRATION FESTSTOFFBELASTETER FLUIDE
Title (fr)
PROCEDE ET DISPOSITIF POUR REALISER UN MICROFILTRAGE DE LIQUIDES CONTENANT DES SUBSTANCES SOLIDES
Publication
Application
Priority
- CH 2006000442 W 20060818
- CH 14492005 A 20050906
Abstract (en)
[origin: WO2007028261A1] The invention relates to a method and device for microfiltering solid substance-containing liquids, wherein a filtering performance decrease caused by a covering layer formation is diminished by the operation of a low excess-pressure filter on the input side and a filtering performance is increased by applying an underpressure on a filtrate side. The underpressure is produced by the use of a special filtering pump. Surprisingly, it is displayed that the covering layer formation is substantially delayed when a driving force, a pressure difference respectively, is primary produced by applying an excessive pressure on the filtrate side and non by the application thereof on the input side. In order to obtain a quasi-continuous operation with a permanent filtering performance by automatically cleaning the filter, the covering layer consisting of impurity particles is removed, when a threshold pressure is attained, by the combination of a short term backflushing and cleaning of the filter surface by a high-pressure nozzle.
IPC 8 full level
B01D 61/14 (2006.01); B01D 61/22 (2006.01); B01D 65/02 (2006.01); C02F 1/44 (2006.01)
CPC (source: EP)
B01D 61/147 (2013.01); B01D 61/22 (2013.01); B01D 65/02 (2013.01); B01D 2321/04 (2013.01); B01D 2321/12 (2013.01); C02F 1/444 (2013.01)
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)
DOCDB simple family (application)
CH 2006000442 W 20060818; EP 06761289 A 20060818