US 7,351,335 B2Granted

Filter module

AssigneeNorit Proces Technologie Holding B.V.

InventorsLute Broens, Harry Futselaar, Ingo Blume, Annemieke Bernadette Edmond Mattheeuws, Michiel Jan Lensink, Lucas Johannes Cornelis Kouters, Marc Johannes Fleuren

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Abstract

A filter module provided with a housing (3) having an inlet (6) for a liquid to be filtered and an outlet (10) for filtered liquid, with a first filter element (7-9, 12) accommodated in the housing (3), in the form of a porous mass provided with a central through-opening, to which the inlet (6) connects, and with a second filter element (1) accommodated in the housing (3) in the form of a number of lengths of tube-shaped filtering membrane (2), which together define a cylinder shape, which cylinder shape, at at least one extremity, between the open-ended filter membranes (2), is filled up with a sealing material, to which extremity the outlet (10) connects. The inlet (6) connects to the central through-opening of the first filter element (7-9, 12), which is surrounded by the second filter element (1), which has the form of a tubular casing obtained by winding from tube-shaped filtering membrane (2).

Claims23

Dependent claims

A filter module comprising:

a housing having an inlet for a liquid to be filtered and an outlet for filtered liquid;
a first filter element accommodated in the housing, in the form of a tubular porous mass provided with a central through-opening, to which the inlet connects;
and
a second filter element accommodated in the housing comprising a number of lengths of tube-shaped filtering membranes formed as a winding into a tubular casing surrounding the first filter element and defining a cylinder shape having opposed extremities, a sealing material disposed at least at one extremity between the filtering membranes to terminate openings at the extremity between the filtering membranes, the outlet connected through the extremity;
and
wherein material is present between the windings of the tubular casing that can cause the formation of calcium crystals from the liquid to be filtered, and a part of the housing surrounding the tubular casing is provided with an inlet and an outlet for flush water.

3 more elements

Dependencies are inferred from the claim text.