Loading patent…
AssigneesFramatome, Bertin & Cie
InventorsJean-Louis Bernou, Frederic Dufau, Isabelle Geahel, Jean Hache
Estimating the term…
The filtration apparatus comprises a bundle of porous filtering elements (12) which are disposed over a certain length of a casing (2) and over a substantial part of its cross-section, and at least one assembly of ultrasonic transducers (15) disposed in at least one cross-sectional plane of the casing regularly spaced at its periphery. Each of the transducers is placed within an opening passing through the casing in a direction perpendicular to the axis of the casing. Ultrasonic waves are emitted within the casing in the direction of the bundle of filtering elements in a zone delimited by a cone, the axis of which extends in a direction perpendicular to the filtering elements and the vertex of which is located in the vicinity of the wall of the casing. The particles torn out by the ultrasonic waves from the filtering elements are recovered by an evacuation conduit (8). The invention is applicable, in particular, to the treatment of fluid used in the nuclear industry, and of other dangerous products.
Filtration apparatus comprising a casing (2), an inlet conduit (7) for liquid to be filtered in said casing (2), an evacuation conduit (9) for filtered liquid, a bundle of spaced porous filtration cartridges (12) disposed over a predetermined length of said casing (2) in an axial direction and over a substantial part of a cross-section of said casing, and fixed at one of their axial ends to a head plate, the inlet conduit and the evacuation conduit opening out on both sides of the filtration assembly in the axial direction and the head plate being disposed transversely in the casing so that the liquid to be filtered is forced through the filtration elements, and a device for ultrasonic cleaning (15, 16) of said porous filtration cartridges (12), said device being constituted by spaced assemblies of transducers (15) disposed in at least one cross-sectional plane of said casing intermediate between axial ends of said filtration cartridges in positions which are regularly spaced at a periphery of said casing, each of said transducers (15) being positioned within an opening passing through said casing, in a direction perpendicular to an axis of said casing, in such a manner as to emit ultrasonic waves, within said casing (2) in the direction of said bundle of filtration cartridges (12) in a zone delimited by cones having axes perpendicular to said filtering cartridges and a vertex adjacent a wall of said casing.
Process for ultrasonic cleaning of a filtration apparatus disposed in a circuit for supply of fluid to be filtered and for recovery of filtered fluid, said apparatus comprising a casing (2), an inlet conduit (7) for liquid to be filtered in said casing (2), an evacuation conduit (9) for filtered liquid, a bundle of porous filtration cartridges (12) disposed between said inlet conduit and said evacuation conduit over a predetermined length of said casing (2) in an axial direction and over a substantial part of a cross-section of said casing, and a device for ultrasonic cleaning (15, 16) of said porous filtration cartridges (12) constituted by spaced assemblies of transducers (15) disposed in at least one cross-sectional plane of said casing (2) in positions which are regularly spaced at a periphery of said casing (2), each of said transducers being placed within an opening passing through said casing, the process comprising the steps of
Dependencies are inferred from the claim text.