Method for cleaning a filter element and a filtering device
AssigneeSofi Filtration Oy
InventorsSimo Aho, Ville Hakala
Life of this patent
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Abstract
The invention relates to a method for cleaning a filter element made of a porous material. The method comprises directing ultrasound to the filter element, and directing after a predefined time from starting of the ultrasound an impulse to a filtrate reservoir causing filtrate inside the filtrate reservoir to be forced inside the filter element in order to remove particles from the surface of the filter element. Pressure of the impulse is between 4 to 8 times higher than the forward pressure and also that the reverse flux, measured in volume per area time, caused by the impulse is at the minimum 2 to 8 times the feed flux. The invention also relates to a filtering device comprising a filter element made of a porous material.
Claims9
A method for cleaning a filter element made of a porous material, the method comprising:
- directing, by an ultrasonic element, ultrasound to the filter element, wherein the ultrasonic element is inside the filter element, and
- directing, after a predefined time from starting of the ultrasound, an impulse to a filtrate reservoir causing filtrate inside the filtrate reservoir to be forced inside the filter element in order to remove particles from the surface of the filter element, wherein pressure of the impulse is between 4 to 8 times higher than the forward pressure, and the reverse flux, measured in volume per area time, caused by the impulse is at the minimum 2 to 8 times the feed flux.
Dependencies are inferred from the claim text.