Method and device for testing the integrity of filtration membranes

A test method, integrity technology, applied in measurement devices, chemical instruments and methods, membranes, etc., can solve problems such as interference results

Inactive Publication Date: 2009-01-07
DEGREMONT SOC DITE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, in an industrial setting, this static test, which requires internal isolation of the membrane, is very sensitive to valve leakage and therefore interferes with the results

Method used

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  • Method and device for testing the integrity of filtration membranes
  • Method and device for testing the integrity of filtration membranes
  • Method and device for testing the integrity of filtration membranes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] Figure 1 shows a filter device of the type described in patent application FR 2 867 394 (04 / 02492) carrying out the method of the invention, to the same company as the applicant of the present application.

[0043]The schematically shown module consisting of a housing C encloses an array M of filter membranes consisting of hollow fibers F with an inner skin ( FIG. 2 ). Each module M comprises several thousand hollow fibers F arranged in parallel between two manifolds G, H for delivery or collection, depending on the direction of flow.

[0044] The housing C has two openings E1 , E2 at the bottom and top respectively, which can be used as outlets and / or inlets. The openings E1 , E2 are connected to the concentrate chamber J formed by the hollow fiber inner space. Inside the housing, the space around and between the filter membranes forms a permeate chamber K with an outlet A.

[0045] The device comprises a pump 1 for supplying the liquid to be filtered, the discharge ...

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PUM

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Abstract

The integrity test method applied to hollow-fibre filtration membranes are of the type with an internal skin, the concentrate compartment (J) being formed by the lower part of the hollow fibres and the permeate compartment (K) being formed by the part on the outside of the hollow fibres; a pressurized gas is made to flow through the concentrate compartment (J) for draining the hollow fibres, which are open at their ends; the method starts by leaving the permeate compartment (K) to the atmosphere, so as to allow the liquid on the surface of the membrane to migrate through the membrane; the permeate compartment (K) is then isolated; the pressure rise in the permeate compartment (K), caused by the circulation of gas in the concentrate compartment (J) and the flow of gas towards the permeate compartment, is measured; and, after a defined time, the pressure rise is compared with that observed when an integral membrane is used.

Description

technical field [0001] The present invention relates to a method of testing the integrity of filtration membranes of tubular geometry, i.e. ultrafiltration, microfiltration, nanofiltration or ultrafiltration, for use in a housing consisting of a housing comprising an array of encapsulated hollow fibers module. Background technique [0002] Ultrafiltration and microfiltration membranes are true physical barriers for the elimination of E. coli-type bacteria, Giardia cysts and cryptosporidian cysts, and are used in water treatment as viable alternatives to traditional disinfection methods, Both for drinking water production and for sewage treatment. [0003] However, the lack of integrity of the filter membrane may contaminate the filtered water circuit, which is thus re-contaminated. The need therefore arises of course to check the integrity of the physical barrier constituted by the filter membrane. [0004] Known integrity testing methods utilize the principle of bubbling...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08B01D65/10
CPCB01D2311/06B01D65/102B01D2313/90G01N15/0826C02F1/444B01D63/02
Inventor M·彼得里
Owner DEGREMONT SOC DITE
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