Assembled filters for the filtration of liquids

Abstract

Membrane filter (1) comprising a plurality of ceramic honeycomb filter elements (2), each element comprising a plurality of parallel ducts (7) separated by walls (8) and open on a face (3) for introduction of the liquid to be filtered, an interstitial volume (6) between said filter elements (2), a filtration membrane arranged on the inner surface of the walls of the ducts (7), in which said filterelements are connected together by means of a curable material (4) that forms, after curing, a sleeve (9) in the form of a single part that firmly attaches, by sealing all of said filter elements (2)separated by the interstitial volume (6), said sleeve having a thickness e of between 1% and 10% of the length of the filter, and the curable material (4) being present in the open porosity and throughout the entire thickness of each porous wall (8) constituting the elements (2) over a non-zero minimum height h.

Description

technical field [0001] The present invention relates to the field of filtration structures made of inorganic materials intended to filter liquids, in particular structures coated with membranes, in order to extract liquids from liquids, more particularly water, for example from oil or shale gas extraction Particles or molecules are separated from produced water. Background technique [0002] Filters using ceramic or non-ceramic membranes to perform filtration of various fluids, especially polluted water, have been known for a long time. These filters work on the principle of pre-filtration, a technique that involves passing the fluid to be treated through the filter media perpendicular to its surface. This technology is limited by particle accumulation and cake formation at the surface of the filter media, and thus leads to a rapid drop in performance, but also to a reduced level of filtration. [0003] According to another technique to which the present invention is also ...

AI Technical Summary

Problems solved by technology

However, no indication is given in this application about the use of such an embodiment, in particular about the means used and the conditions that make it possible to obtain a filter that is reliable over time, i.e. with an extension in the filter Integrity and leak-tightness guaranteed and maintained throughout life

[0014] In particular, no indication is given in this publication as to the mechanical strength imparted to the assembly by the mounting ring, in particular its compressive strength and resistance to deformation under the pressure exerted by the housing into which the filter structure will be inserted, during use indications, or indications regarding the filtration performance of complex filters assembled like this

[0015] The applicant company has demonstrated that substantial problems in this construction lie especially in the quality of filtration of the incoming liquid

Images