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1. WO2020097410 - SYSTEM AND METHOD FOR CLEANING MEMBRANE FILTERS IN-LINE IN A WATER PURIFICATION SYSTEM

Publication Number WO/2020/097410
Publication Date 14.05.2020
International Application No. PCT/US2019/060382
International Filing Date 08.11.2019
IPC
B01D 65/02 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
65Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
02Membrane cleaning or sterilisation
B01D 61/02 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
61Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
02Reverse osmosis; Hyperfiltration
B01D 71/02 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
71Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
02Inorganic material
CPC
B01D 2311/04
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2311Details relating to membrane separation process operations and control
04Specific process operations in the feed stream; Feed pretreatment
B01D 2311/2634
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2311Details relating to membrane separation process operations and control
26Further operations combined with membrane separation precesses
263Chemical reaction
2634Oxidation
B01D 2313/19
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2313Details relating to membrane modules or apparatus
19Specific flow restrictors
B01D 2313/20
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2313Details relating to membrane modules or apparatus
20Specific housing
B01D 2313/24
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2313Details relating to membrane modules or apparatus
24Specific pressurizing or depressurizing means
B01D 2313/243
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2313Details relating to membrane modules or apparatus
24Specific pressurizing or depressurizing means
243Pumps
Applicants
  • LONZA LTD [CH]/[CH]
  • MIETZNER, Michael [US]/[CH] (US)
Inventors
  • MIETZNER, Michael
Agents
  • CASSIDY, Timothy, A.
Priority Data
62/758,00109.11.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SYSTEM AND METHOD FOR CLEANING MEMBRANE FILTERS IN-LINE IN A WATER PURIFICATION SYSTEM
(FR) SYSTÈME ET PROCÉDÉ DE NETTOYAGE DE FILTRES À MEMBRANE EN LIGNE DANS UN SYSTÈME DE PURIFICATION D'EAU
Abstract
(EN)
A process and system for cleaning semipermeable membranes is described that is particularly well suited for cleaning membranes contained in a water purification system, such as a reverse osmosis process. In order to clean the filter membranes, the membranes are placed in a cleaning chamber capable of allowing a reduction in pressure. In one embodiment, for instance, the membranes are contained in a filter housing and the filter housing is converted into a cleaning chamber by sealing off at least one end. The membranes are then submerged in a cleaning fluid and the pressure within the cleaning chamber is reduced causing the cleaning fluid to form bubbles. The process and system of the present disclosure is well suited to cleaning filter membranes, particularly ceramic membranes, in-line without having to remove the membranes from the water purification system.
(FR)
L'invention concerne un procédé et un système de nettoyage de membranes semi-perméables qui est particulièrement bien adapté à des membranes de nettoyage contenues dans un système de purification d'eau, tel qu'un traitement d'osmose inverse. Afin de nettoyer les membranes filtrantes, les membranes sont placées dans une chambre de nettoyage pouvant permettre une réduction de pression. Dans un mode de réalisation, par exemple, les membranes sont contenues dans un boîtier de filtre et le boîtier de filtre est converti en une chambre de nettoyage en scellant au moins une extrémité. Les membranes sont ensuite submergées dans un fluide de nettoyage et la pression à l'intérieur de la chambre de nettoyage est réduite, ce qui amène le fluide de nettoyage à former des bulles. Le procédé et le système de la présente invention sont bien appropriés pour nettoyer des membranes filtrantes, en particulier des membranes en céramique, en ligne sans avoir à retirer les membranes du système de purification d'eau.
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