US4218314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hyperfiltration scoop apparatus and method
Assignee: GRAVER SEPARATIONS Inc
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Filing: 1978-07-20
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Granted: 1980-08-19
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Expires: 1998-07-20
Abstract
Abstract The efficiency of membrane separation is enhanced in a hyperfiltration process by scooping off controlled amounts of the boundary layer at desired points along the flow path where useful concentrations have been achieved avoiding the necessity of bringing the entire flow up to desired concentration. The use of porous stainless steel supports with membranes formed therein in situ after fabrication from the pipe sections in a single pass configuration is especially advantageous with scoop apparatus spaced along the length of the stainless supports.
Inventors
- 👤 James P. Schubert
- 👤 Donald K. Todd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:54
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/02; B01D61/10; B01D63/00; B01D63/06; B01D65/00; B01D65/08; B01D2313/00; B01D2313/12; B01D2321/00; B01D2321/20; B01D2321/2008; B01D2323/00; B01D2323/40; Y; Y10; Y10S; Y10S210/00; Y10S210/918
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
116 words
For use in a hyperfiltration apparatus for increasing the concentration of an effluent from a fluid treatment process, the improvement comprising: a permeable tubular structural support member; a membrane supported by said tubular structural support member extending along said member internally thereof presenting an open elongated flow path; an opening in said membrane intermediate the ends of said member; an opening in said support member in register with said opening in said membrane for flow of boundary layer fluid therethrough; and means for collecting boundary layer fluid passing through said openings; whereby the fluid flow very near a membrane fluid interface is highly concentrated and may be removed as a concentrate through said openings for collection.
Claim 2
Dependent Claim
116 words
For use in a hyperfiltration apparatus for increasing the concentration of an effluent from a fluid treatment process, the improvement comprising: a permeable tubular structural support member; a membrane supported by said tubular structural support member extending along said member internally thereof presenting an open elongated flow path; an opening in said membrane intermediate the ends of said member; an opening in said support member in register with said opening in said membrane for flow of boundary layer fluid therethrough; and means for collecting boundary layer fluid passing through said openings; whereby the fluid flow very near a membrane fluid interface is highly concentrated and may be removed as a concentrate through said openings for collection.
Claim 3
Dependent Claim
19 words
The structure set forth in claim 1 including spaced structural support sections and spaced membrane portions forming circumferential openings.
Claim 4
Dependent Claim
16 words
The structure set forth in claim 1 including spaced membrane portions with a continuous support member.
Claim 5
Dependent Claim
23 words
The structure set forth in claim 1 including an inwardly projecting circumferential member extending across said boundary layer fluid and then facing upstream.
Claim 6
Dependent Claim
41 words
The structure set forth in claims, 1, 2, 3, or 4 wherein said structural support member is fabricated from sections of porous stainless metallicpipe and wherein said membrane is deposited in situ upon the interior of said support member after fabrication.
Claim 7
Independent Claim
94 words
The method of increasing the concentration of an effluent from a fluid treatment process comprising the steps of: passing said effluent under pressure into an elongated tubular continuous hyperfiltration apparatus having a membrane extending along said apparatus internally thereof presenting an open elongated flow path; forming a boundary layer of predetermined concentration after passage of said effluent through at least a substantial portion of said apparatus; scooping away the boundary layer of said perdetermined concentration retaining less concentrated portions of effluent; and utilizing the boundary layer thus scooped away in said fluid treatment process.
Claim 8
Independent Claim
94 words
The method of increasing the concentration of an effluent from a fluid treatment process comprising the steps of: passing said effluent under pressure into an elongated tubular continuous hyperfiltration apparatus having a membrane extending along said apparatus internally thereof presenting an open elongated flow path; forming a boundary layer of predetermined concentration after passage of said effluent through at least a substantial portion of said apparatus; scooping away the boundary layer of said perdetermined concentration retaining less concentrated portions of effluent; and utilizing the boundary layer thus scooped away in said fluid treatment process.
Claim 9
Dependent Claim
28 words
The method set forth in claim 6 including recycling said remaining less concentrated portions of effluent and passing same with the first mentioned effluent into said hyperfiltration aparatus.
References Cited (Backward Citations)
US3676355A
Cited
US3657402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-19 | 1984-02-18 | 1984-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-19 | 1988-02-18 | 1988-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-19 | 1992-02-18 | 1992-08-19 | $7700.00 | Window Closed / Lapsed |