Membrane module

US7998254B2 · kind B2 · utility

Assignee

• Porous Media Corporation · US

Inventors

• John H. Burban · Lauderdale, US
• Jeffrey William Berg · Lino Lakes, US
• Brent Joseph Steffensmeier · Vadnais Heights, US
• Joseph Charles Tuma · Forest Lake, US
• Carl M. Geisz · Edina, US
• Craig J. Cuta · White Bear Lake, US

Key dates

• Filing date: Sep 21, 2007
• Grant date: Aug 16, 2011
• Expiry date: Jun 18, 2029

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2313/23
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A helically wound hollow membrane module having a core with a plurality of helically wound layers of semi-permeable hollow fibers wound on the core. The fiber wind angle with respect to any one layer of fibers may be essentially constant along the axial length of the module, except in one or both end or tubesheet regions, where the wind angle may be increased, in at least some of the layers relative to the essentially constant wind angle, to produce an area of decreasing diameter.