公开(公告)号：US10668415B2

公开(公告)日：2020-06-02

申请号：US15392371

申请日：2016-12-28

Applicant: GRUNDFOS HOLDING A/S

Inventor： Dominik Dominiak ,  Rikke Eriksen Gissel ,  Jacob Appelt Vibe Svendsen ,  Xing Zheng ,  Jan Carøe Aarestrup

IPC: C02F1/00 ,  C02F3/00 ,  B01D37/04 ,  B01D65/02 ,  B01D61/16 ,  B01D29/66 ,  B01D37/03 ,  A61M1/16 ,  B01D17/02

Abstract: a filtering method, with which a fluid to be filtered is led through a filter (4), the filter (4) is back-flushed at regular time intervals and a pre-treatment agent is added to the fluid at the entry side of the filter. A process variable which describes the efficiency of the filtration is continuously computed during the filtration, and a metering quantity of the pre-treatment agent is reset on the basis of the values for the process variable or a characteristic values derived from this.