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US 5,240,612 AGranted
Filtration of liquid media under conditions of non-steady tangential flow
AssigneeTechsep
InventorsAndre Grangeon, Jeanine Lenoir, Robert Pellissier
Life of this patent
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AssigneeTechsep
InventorsAndre Grangeon, Jeanine Lenoir, Robert Pellissier
Estimating the term…
Filterable liquid media are continuously filtered by circulating same in a closed circulation loop, to and tangentially through a filtration module provided therealong which confines at least one filtration membrane, e.g., a microfiltration, ultrafiltration or reverse osmosis membrane, and which includes a permeate outlet, and by adjusting the flowrate but not the driving pressure of circulating liquid medium, notably by means of an apertured and perforated rotating disc, as to establish a non-steady periodic pseudophysiological flow thereof, at least over the working face surfaces of the at least one membrane.
A process for the continuous filtration of a filterable liquid medium, comprising circulating said filterable liquid medium at an established flowrate and driving pressure in a circulation loop and tangentially through a filtration module provided therealong which comprises at least one filtration membrane having operative face surfaces and a permeate outlet, and adjusting the flowrate but not the driving pressure of said circulating liquid medium so as to establish a non-steady periodic pseudophysiological and unevenly distributed flow approaching said at least one membrane and, at least over the operative face surfaces of said at least one filtration membrane.
An apparatus for the continuous filtration of a filterable liquid medium, comprising a liquid medium circulation loop, a filtration module operably provided therealong including a permeate outlet and at lest one filtration membrane having operative face surface, means for driving a filterable liquid medium at a desired flowrate and driving pressure, so as to traverse said circulation loop and tangentially flow through said filtration module, and means for adjusting the flowrate but not the driving pressure of said circulating liquid medium so as to establish a non-steady periodic pseudophysiological and unevenly distributed flow approaching said at least one membrane and, at least over the operative face surfaces of said at least one membrane.
A filtration module for the continuous filtration of a filterable liquid medium having means to provide a desired flowrate and driving pressure, comprising (i) at least one inlet opening for a filterable liquid medium, at least one retentate outlet opening and at least one permeate outlet opening, (ii) at least one filtration membrane having operative face surfaces operably housed therein, and (iii) means for adjusting the inlet flowrate but not the driving pressure o filterable liquid medium introduced therein so as to establish a non-steady periodic pseudophysiological and unevenly distributed flow approaching said at least one membrane and, at least over the operative face surfaces of said at least one membrane.
A filtration module for the continuous filtration of a filterable liquid medium having means to provide a desired flowrate and driving pressure comprising (i) at least one inlet opening for a filterable liquid medium, at least one retantate outlet opening and at least one permeate outlet opening, (ii) more than ne filtration membrane having operative face surfaces operably housed therein, and (iii) a rotatable distributor disc, having an aperture and perforations therein, perpendicularly disposed to said filtration membranes and spaced either upstream or downstream therefrom, said disc being configured and arranged to adjust the flowrate but not the driving pressure through said membranes so as to established a non-steady periodic pseudophysiological flow, wherein the flowrate continuously varies between said membranes.
Dependencies are inferred from the claim text.