Filter cleaning

Details Filter cleaning Filter cleaning

B - Operations, Transporting

01

D

B01D 65/02 (2006.01) B01D 29/25 (2006.01) B01D 61/42 (2006.01) B01D 65/08 (2006.01) C25F 1/00 (2006.01)

Patent

CA 2150311

An electrically conducting filter medium (20) is cleaned in situ by applying, at intervals, a brief voltage pulse between the medium (20) and a counter electrode (18) so the process liquid undergoes electrolysis. The cleaning process is significantly improved by occasionally applying a voltage of reverse polarity. For example a 5 second cleaning pulse making the filter medium (20) cathodic might be applied every quarter of an hour, and a reverse polarity pulse of similar duration applied every two hours. This process can significantly increase permeation rates.

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