Non-nesting, non-deforming patterns for spiral-wound elements
AssigneeAqua Membranes Inc.
InventorsKevin Roderick, Rodney Herrington
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Abstract
Embodiments of the present invention provide for the deposition of spacing elements for spiral wound elements that prevent nesting of adjacent spacer layers and occlusion of feed space during element rolling.
Claims12
A spiral wound permeable membrane system, comprising a membrane spirally wound about a center tube, wherein the membrane has spacing features disposed on a surface of the membrane, wherein the spacing features are configured such that they do not nest with spacing features on adjacent windings when spirally wound, wherein the spacing features comprise a plurality of substantially parallel line segments spaced apart from each other by nonuniform spacing distances, and wherein each spacing feature has a long axis oriented non-parallel to the direction of spiral winding,
- wherein the spacing features are more closely spaced near the edges of the membrane than in portions of the membrane distant from the edges.
A spiral wound permeable membrane system, comprising a membrane spirally wound about a center tube, wherein the membrane has spacing features disposed on a surface of the membrane, wherein the spacing features are configured such that they do not nest with spacing features on adjacent windings when spirally wound, wherein the spacing features comprise a plurality of substantially parallel line segments spaced apart from each other by nonuniform spacing distances, and wherein each spacing feature has a long axis oriented non-parallel to the direction of spiral winding,
- wherein the nonuniform spacing distances comprise a plurality of spacing distances, and wherein the largest spacing distance of such spacing distances minus the smallest spacing distance of such spacing distances is less than 15% of the average of all such spacing distances.
Dependencies are inferred from the claim text.