B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 65/02 (2006.01)
Patent
CA 2558441
The invention relates to a method of cleaning membrane filters comprising hollow fibres and an inner skin. The inventive method comprises the following steps consisting in: emptying the concentrate compartment in order to release the liquid to be filtered contained therein and the suspended matter, and, subsequently, performing a backwashing step involving the passage of liquid from the permeate compartment into the concentrate compartment through membranes in order to detach and release impurities deposited thereon, while circulating a gas in the concentrate. According to the invention, backwashing liquid and/or gas pulses are produced by control means (5, 5a; 7, 7a) during at least one backwashing phase.
Procédé de nettoyage de membranes de filtration en fibres creuses ô peau interne, comprenant les étapes consistant à : vider le compartiment concentrat pour évacuer le liquide à filtrer qu'il contient et les matières en suspension, puis effectuer un rétro-lavage par passage de liquide du compartiment perméat vers le compartiment concentrat au travers des membranes pour décoller et évacuer les impuretés déposées sur celles-ci tout en faisant circuler un gaz dans le concentrat. Des pulsations du gaz et/ou du liquide de rétro-lavage sont provoquées par des moyens de commande (5,5a; 7, 7a) pendant au moins une phase du rétro-lavage.
Bonnelye Veronique
Colas Frederic
Petry Marc
Degremont
Robic
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