公开(公告)号：US10702804B2

公开(公告)日：2020-07-07

申请号：US16161049

申请日：2018-10-15

Applicant: I.D.E. TECHNOLOGIES LTD

Inventor： Boris Liberman ,  Vitality Levitin ,  Gal Greenberg

IPC: B01D24/46 ,  B01D24/20 ,  C02F1/00 ,  B01D24/22

Abstract: A local backwashing apparatus 110 for a filtering system comprises an enclosure 119 having an open lower end, positionable above a surface of filter media 92 supported by a drainage layer 96. The enclosure is connected to a mechanical member (300, FIG. 6A) configured to force the enclosure into the filter media and release the force prior to the lower end of the enclosure contacting the drainage layer. The lower end of the enclosure being brought into contact with the drainage layer through a pressure differential between the interior and exterior of the enclosure. A pneumatic system such as an air pump, is in fluid communication with the upper part 127 of the enclosure and is configured to determine an air pressure therein. A pipe system connects the upper part of the enclosure with the pneumatic system and with a discharge structure 132. A control unit is connected to the pneumatic system. Also disclosed is a method of backwashing a filtering system. The backwashing apparatus may be used to pre-treat water.