FEED SPACER FOR SPIRAL WOUND MEMBRANE ELEMENT
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United States of America Patent
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Issued Date -
Jun 13, 2013
app pub date -
Dec 9, 2011
filing date -
Dec 9, 2011
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Abstract
A feed channel spacer for use in a spiral wound membrane element provides a series of generally parallel interior channels. The interior channels extend from an inlet side of the spacer to an outlet side of the spacer, but follow an undulating or zigzagging path. Dean's vortices or other flow patterns that cause mixing reduce concentration polarization. The feed channel spacer is made by pressing a sheet of thermoplastic material in a die.
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