D/T Module: Desalination0 pages

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Pall Corporation

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Contact Us: www.pall.com/contact

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D/T Module: Desalination

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Description

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The modular design consists of individual thin film composite membranes

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cushioned between hydraulic cover disks, stacked, and assembled about a

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centertenslon rod and effectively sealed

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between metal end flanges.

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Disc Tube Module Operation

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Seawaterflows down passages between the disc stack and the pressure vessel and enters the flow

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chamberfrom beneath the bottom disk. The flow is directed up and over each membrane cushion allowing

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pure waterto pass through the semi-permeable membrane and be collected by the permeate collector.

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Feedwater contamination is prevented by '0' ring seals fitted to the hydraulic disks. As the pure water is

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removed the strongly concentrated feed Is taken away to discharge. The open channel created by the

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membrane cushion enables fully turbulent feedwater and permeate flow. It can also operate on sea water

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with a silt density Index (SDI) as high as 20 without risk of fouling the RO membranes.

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Application

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Flow Diagram

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Row diagram - DT Membrane - Water Dssalirrahori

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am

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Sir,

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	4 frnr*#n -4 CMrtij rip Mkyi
Br
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Specifications

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Features and Benefits

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The Pall DÍT Module Is designed to overcome many of the problems associated with existing reverse

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osmosis desalination systems:

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r> Unrestricted, open channel, turbulent feedwater flow

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K No chemical pre or post treatment required

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r- High permeate recovery rates: 30% from seawater; 50% from 'brackish'water

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► Low environmental impact

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► Integrated self cleaning system

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■ Simple and flexible maintenance procedures

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K Long membrane life - 5 years plus

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► High performance and low operating costs Energy requirements:

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Seawater - 10kWWm3 of pure water Brackish water - 4kWh/m3 of pure water

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