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Membrane module

  • US 20080072754A1
  • Filed: 09/21/2007
  • Published: 03/27/2008
  • Est. Priority Date: 09/22/2006
  • Status: Active Grant
First Claim
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1. A helically wound hollow fiber membrane module comprising:

  • (a) a core;

    (b) a plurality of helically wound layers of semi-permeable hollow fibers wound on the core, wherein the fiber wind angle with respect to any one layer of fibers is essentially constant along the axial length of the module, except in one or both end or tubesheet regions, where the wind angle is increased, in at least some of the layers relative to the essentially constant wind angle, to produce an area of decreasing diameter and packing fraction.

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