Koch Membrane Systems Gmbh

Other

Koch Separation Solutions, Inc.

David M Colby

Taylour L Johnson

Chang-Li Hsieh

Frederick K Lesan

Anjan Kumar Mukherjee

Alan M Franks

Manwinder Singh

Thomas C McDermott, Jr

Carlos A Fagundes

A membrane filter module configured to treat a liquid contained in a tank at an ambient pressure. The module may have a header, with a bundle containing a plurality of substantially vertical hollow fiber membranes, wherein a lower end of each hollow fiber membrane is fixed in the header. The module may also have a gasification device adapted to periodically generate a gaseous bubble and configured to release the gaseous bubble within the bundle. The module may further have an enclosure that substantially surrounds the bundle that extends from a lower region to an upper region of the membrane bundle, wherein the enclosure is configured to retain the liquid introduced into the enclosure such that the liquid surrounds the membrane bundle. The gaseous bubble has a cross-sectional area that corresponds with a cross-sectional area of the enclosure, such that the cross-sectional area of the gaseous bubble occupies substantially the entire cross-sectional area of the enclosure as it flows along the bundle.

Membrane module system with bundle enclosures and pulsed aeration and method of operation

The present invention is directed to a method of sealing the free end of a hollow fiber membrane for use in a single header filtration module by dipping the end of the membrane into a low-viscosity light-curable adhesive and curing the adhesive. The invention further encompasses the resulting sealed hollow fiber membrane with a diameter that is only slightly larger than the diameter of the unsealed membrane.

Method for sealing hollow fiber membranes

Bundle body

Gasification device

A coupler for a spiral membrane filtration element having a spiral membrane enclosed within a rigid outerwrap includes a center support, a plurality of spokes extending outwardly from the center support, a circular rim coupled with the spokes, with the face of the rim being perpendicular to the axis of the overwrap. The rim includes a channel on its face for receiving a compressible seal, and a plurality of receptacles around its outer surface for joining two face-to-face adjacent couplers when a pair of aligned keepers is place in each receptacle. Exemplary embodiments of the coupler and filtration elements and filtration assemblies are provided, as well as an associated method.

Filtration element and method of constructing a filtration assembly

A coupler for a spiral membrane filtration element having a spiral membrane enclosed within a rigid outerwrap includes a center support, a plurality of spokes extending outwardly from the center support, a circular rim coupled with the spokes, with the face of the rim being perpendicular to the axis of the overwrap. The rim includes a channel on its face for receiving a compressible seal, and a plurality of receptacles around its outer surface for joining two face-to-face adjacent couplers when a pair of aligned keepers is placed in each receptacle. Exemplary embodiments of the coupler and filtration elements and filtration assemblies are provided, as well as an associated method.

A membrane filtration module is provided incorporating a seal assembly to seal the annular space or bypass channel existing between the outer diameter of the filtration cartridge and the inner diameter of the housing in which it is disposed. The seal assembly prevents a feed stream from entering the bypass channel, and includes a pair of seals each having a flexible gasket and a sleeve extending perpendicularly therefrom, the sleeve being adapted to be positioned directly on the cartridge. This positioning prevents the feed stream from ever coming into contact with the housing.

Spiral filtration module having bypass prevention flange

An ultrafiltration module and method of constructing same is the subject of the present invention. The module comprises a permeate collector tube and one or more membrane leaves wound around the tube together with a feed channel spacer so as to present spaced layers of membrane leaves or envelopes that are contacted by fluid flowing axially through the module in the channel provided by the feed spacer screen. The feed spacer screen projects beyond the terminal ends of the leaves to present an open mesh outerwrap screen circumscribing the wound leaves. A plurality of restraining bands are provided in longitudinally spaced relationship along the length of the module. These bands are designed to hold the entire module assembly in tight spiral relationship. Preferably, the bands are constructed of heat shrinkable material and are thus secured in place and tightened by the application of heat. After the restraining bands are in place, a bypass screen also of open mesh configuration is wrapped around the outerwrap and the restraining bands and secured by overlapping it onto itself and fusing the overlapped portion.

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Wilmington, MA, United States of America

David M Colby