Filter system and a cartridge containing a cellular granular material
OwnerChantal Boissie, Deborah Lucenet +2inventors
InventorsChantal Boissie, Deborah Lucenet, David Lucenet, Nicolas Satz
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Abstract
The main application of the invention lies in making cartridges, filters and complete filter systems for regeneration purposes, in particular for regenerating swimming pool water, and for that purpose it comprises at least a system for physically treating water by means of an inert granular material enclosed in at least one envelope through which said water can flow, passing through said material; according to the invention, the material is of cellular structure, having relative density of less than 1, and is constituted by pozzolan having a grain size that is less than or equal to 25 mm.
Claims15
A method for filtering a liquid containing solids comprising passing the liquid through an envelope comprising one and only one material for filtering the liquid, said material being granular pozzolan having a relative density of less than 1 g/cm.sup.3 and a grain size of less than or equal to 25 mm.
In a method for filtering solids from a liquid in a reservoir, wherein the liquid is continually circulated from the reservoir through a circuit comprising a filter with a filter material consisting of sand and back to the reservoir such that solids in the liquid are continually trapped and retained in the filter material with a concommitant loss of head in the circuit, the improvement wherein the filter material is granular pozzolan having sufficient grain size and density to trap and retain the solids with a reduced loss of head in the circuit.
In a filter system for physically treating liquid comprising at least one envelope and an inert granular material enclosed in the at least one envelope such that liquid flowing through the at least one envelope passes through said material, the improvement wherein the material is of cellular structure, of relative density less than 1 g/cm.sup.3, and is granular pozzolan having a grain size that is less than or equal to 25 mm.
Dependencies are inferred from the claim text.