Spiral wound membrane modules multi-leaf

First multi-leaf spiral wound membrane module developed by Don Bray and others at Gulf General Atomic, under US Patent no. 3,417,870, "Reverse Osmosis Purification Apparatus," December, 1968. A multi-leaf spiral configuration improves the flow characteristics of the RO module by minimizing the pressure drop encountered by permeate as it spirals into the central collection tube. 

Within a few years of the invention of the L-S membrane, development of the RO membrane modules technique was reaHsed. Haven and Guy developed tubular RO membranes in the mid-1960s. In the late 1960s, Westmoreland and later Bray invented the spiral-wound module, which was more efficient than the tube-in-sheU module. The spiral-wound membrane can be viewed as a plate-and-frame (PAF) arrangement that has been rolled up. The original module had a single leaf of membrane whereas modem spiral-wound modules contain multi-leaf membranes. 

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See also in sourсe #XX -- [ , ]

See also in sourсe #XX -- [ , ]

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