Membrane and osmosis elements for pressure-retarded and forward osmosis separation systems and methods
EP4757923A1Pending Publication Date: 2026-06-17IDE WATER TECH LTD
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Patent Information
- Application Number
- EP2024851225
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-08-07
- Filing Date
- 2024-08-07
- Publication Date
- 2026-06-17
AI Technical Summary
Technical Problem
Existing osmosis systems face challenges with uneven pressure and flow distribution, leading to strong pressure drops and limited ability to support high flow rates in pressure-retarded and forward osmosis separation applications.
Method used
The osmosis element features a central permeate tube segmented into parts with perforations, combined with a high flow, low pressure drop (HFLP) spacer that facilitates homogenous flow distribution by allowing fluid to exit and re-enter the tube through specific apertures and patterns.
Benefits of technology
This configuration enhances flow distribution across the semi-permeable membrane, reducing pressure drops and enabling higher flow rates, thus improving the efficiency of osmosis separation processes.
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Smart Images
Figure IB2024057640_13022025_PF_FP_ABST
Abstract
The present invention discloses a membrane element configured for PRO and / or FO water process comprising: a. at least one permeate tube (PT) having at least one perforation in the periphery thereof along the main longitudinal axis of said at least one PT; said at least one PT is adapted facilitate (a) flow of feed stream having low salinity therewithin; (b) flow of Q low salinity stream departure from said at least one PT; and (c) flow of Q1 of low salinity stream reentering into said PT; where Q1<Q; said flow is provided by means of at least one high flow, low pressure drop spacer (HFLP); b. at least one semipermeable membrane in fluid communication with said at least one HFLP; wherein said HFLP is characterized by a predetermined pattern allowing high flow, low pressure drop stream in at least one first direction and at least one second direction.
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