Patent US3744643A successfully refreshed from Google Patents.
US3744643A
Expired / Lapsed
US
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Suspension clearing treatment device
Assignee: Ebara Corp
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Filing: 1971-06-11
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Granted: 1973-07-10
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Expires: 1991-06-11
Abstract
Abstract A device for clarifying suspensions comprises an aggregation chamber, a floc-forming chamber and a settling chamber. The aggregation chamber has therein partitions to provide circuitous flow therethrough, preferably in a vertical direction. Openable ports are provided at the bottom of the aggregation chamber for removal of aggregate which might interfere with the flow of fluid therethrough. Flow of fluid from one chamber to another is essentially radial.
Inventors
- 👤 S Tsunoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:02
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/0003; B01D21/0024; B01D21/003; B01D21/0039; B01D21/0042; B01D21/0066; B01D21/02; B01D21/04; B01D21/06; B01D21/08; B01D21/10; B01D21/24; B01D21/2427; B01D21/30; B01D21/34; C; C02; C02F; C02F1/00; C02F1/52; C02F1/5281
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
330 words
A device for clarifying suspensions, comprising a tank having upstanding side-walls; means for supplying a suspension to be clarified; means defining a circuitous passage disposed proximate the center of and above the bottom of said tank, said circuitous passage means having entrance and exit ends and comprising vertical partitions having alternate bottom and top openings in successive partitions, Said partitions defining a plurality of polygonal, vertical compartments so that flow of suspension through said compartments is alternately upward and downward, said suspension-supplying-means being disposed to supply said suspension to said entrance end of said circuitous passage, said circuitous passage constituting a chamber for the aggregation of fine material and settling of heavy particulate matter; a distribution chamber surrounding said aggregation chamber; first connecting means connecting said exit end of said circuitous passage with said distribution chamber for flow of suspension thereinto; at least one tapered pit within said tank and external to said distribution chamber; second connecting means connecting said distribution chamber with said tapered pit proximate the bottom thereof, there being one second connecting means from said distribution chamber to each pit, whereby the direction of flow of fluid in said pit is upward, said pit serving for the formation of floc; an annular wall intermediate said tank wall and distribution chamber, said annular wall being lower in height than said distribution chamber and in combination with the bottom of said tank defining a concentration chamber into which floc from said fluid rising out of said tapered pit can pass by flowing over said annular wall and be concentrated to a sludge as the remaining clarified fluid rises toward the top of said pit; means for removing sludge from said concentration chamber; and means for removing said clarified fluid from proximate the top of said pit to the exterior of said tank, the fluid levels in said aggregation chamber being higher than said means for removing clarified fluid so that flow through said device is accomplished by gravity alone.
Claim 2
Independent Claim
330 words
A device for clarifying suspensions, comprising a tank having upstanding side-walls; means for supplying a suspension to be clarified; means defining a circuitous passage disposed proximate the center of and above the bottom of said tank, said circuitous passage means having entrance and exit ends and comprising vertical partitions having alternate bottom and top openings in successive partitions, Said partitions defining a plurality of polygonal, vertical compartments so that flow of suspension through said compartments is alternately upward and downward, said suspension-supplying-means being disposed to supply said suspension to said entrance end of said circuitous passage, said circuitous passage constituting a chamber for the aggregation of fine material and settling of heavy particulate matter; a distribution chamber surrounding said aggregation chamber; first connecting means connecting said exit end of said circuitous passage with said distribution chamber for flow of suspension thereinto; at least one tapered pit within said tank and external to said distribution chamber; second connecting means connecting said distribution chamber with said tapered pit proximate the bottom thereof, there being one second connecting means from said distribution chamber to each pit, whereby the direction of flow of fluid in said pit is upward, said pit serving for the formation of floc; an annular wall intermediate said tank wall and distribution chamber, said annular wall being lower in height than said distribution chamber and in combination with the bottom of said tank defining a concentration chamber into which floc from said fluid rising out of said tapered pit can pass by flowing over said annular wall and be concentrated to a sludge as the remaining clarified fluid rises toward the top of said pit; means for removing sludge from said concentration chamber; and means for removing said clarified fluid from proximate the top of said pit to the exterior of said tank, the fluid levels in said aggregation chamber being higher than said means for removing clarified fluid so that flow through said device is accomplished by gravity alone.
Claim 3
Dependent Claim
93 words
A device as defined in claim 1 wherein said compartments are in one of triangular and rectangular array, and further comprising at least one port common to at least two of said compartments, a cover normally in closed position against said port and displacing means for removing said cover from said port to allow collected heavy particulate matter to fall into said concentration chamber and for replacing said cover against said port, whereby the number of ports and displacing means is substantially fewer than the number of vertical compartments in said aggregating chamber.
Claim 4
Dependent Claim
27 words
Device as defined in claim 1, further comprising a rotating scraper within said concentrating chamber, said scraper serving to increase the rate of settling of said floc.
Claim 5
Dependent Claim
62 words
Device as defined in claim 1, wherein said essentially vertical passaages are triangular in cross-section and are so arrayed that each partition other than a boundary wall serves for two passages, and a port is in each passage located at the junction point of 6 triangular passages, whereby displacement of one port-cover serves for the removal of sedimented material from 6 passages.
Claim 6
Dependent Claim
42 words
Device as defined in claim 1, wherein at least one partition within said aggregating chamber is movable, thereby providing for altering the size of at least one opening and providing control over the rate of flow of said suspension through said device.
Claim 7
Dependent Claim
63 words
Device as defined in claim 1, wherein said essentially vertical passages are arrayed in a central passage and concentric annuli about said central passage, each annulus having a plurality of passages therein, said inlet means introduces suspension into said central passage and the course of flow is through each of the contiguous passages in a single annulus before entering the next outer annulus.
Claim 8
Dependent Claim
27 words
Device as claimed in claim 1 wherein the number of passages is such that the direction of flow through the last passage is in a downward direction.
Claim 9
Independent Claim
278 words
A device for clarifying suspensions, comprising a tank having upstanding side-walls; means for supplying a suspension to be clarified; means defining a circuitous passage disposed proximate the center of and above the bottom of said tank, said circuitous passage means having entrance and exit ends, said circuitouS passage constituting a chamber for the aggregation of fine material and settling of heavy particulate matter; a distribution chamber surrounding said aggregation chamber; first connecting means connecting said exit end of said circuitous passage with said distribution chamber for flow of suspension thereinto; at least one tapered pit within said tank and external to said distribution chamber; second connecting means connecting said distribution chamber with said tapered pit proximate the bottom thereof, there being one second connecting means from said distribution chamber to each pit, whereby the direction of flow of fluid in said pit is upward, said pit serving for the formation of floc; an annular wall intermediate said tank wall and distribution chamber, said annular wall being lower in height than said distribution chamber and in combination with the bottom of said tank defining a concentration chamber into which floc from said fluid rising out of said tapered pit can pass by flowing over said annular wall and be concentrated to a sludge as the remaining clarified fluid rises toward the top of said pit; means for removing sludge from said concentration chamber; and means for removing said clarified fluid from proximate the top of said pit to the exterior of said tank, the fluid levels in said aggregation chamber being higher than said means for removing fluid so that flow through said device is accomplished by gravity alone.
Claim 10
Independent Claim
278 words
A device for clarifying suspensions, comprising a tank having upstanding side-walls; means for supplying a suspension to be clarified; means defining a circuitous passage disposed proximate the center of and above the bottom of said tank, said circuitous passage means having entrance and exit ends, said circuitouS passage constituting a chamber for the aggregation of fine material and settling of heavy particulate matter; a distribution chamber surrounding said aggregation chamber; first connecting means connecting said exit end of said circuitous passage with said distribution chamber for flow of suspension thereinto; at least one tapered pit within said tank and external to said distribution chamber; second connecting means connecting said distribution chamber with said tapered pit proximate the bottom thereof, there being one second connecting means from said distribution chamber to each pit, whereby the direction of flow of fluid in said pit is upward, said pit serving for the formation of floc; an annular wall intermediate said tank wall and distribution chamber, said annular wall being lower in height than said distribution chamber and in combination with the bottom of said tank defining a concentration chamber into which floc from said fluid rising out of said tapered pit can pass by flowing over said annular wall and be concentrated to a sludge as the remaining clarified fluid rises toward the top of said pit; means for removing sludge from said concentration chamber; and means for removing said clarified fluid from proximate the top of said pit to the exterior of said tank, the fluid levels in said aggregation chamber being higher than said means for removing fluid so that flow through said device is accomplished by gravity alone.
Claim 11
Dependent Claim
69 words
A device as defined in claim 8, wherein said means defining said circuitous passage is at least one vertical partition reaching from the bottom of said chamber to a height above the fluid in said chamber, whereby flow of fluid through said chamber is essentially horizontal with sediment in said fluid dropping to the bottom of said chamber and lighter material forming aggregate proximate the surface of said fluid.
Claim 12
Dependent Claim
21 words
A device as defined in claim 8 wherein said circuitous passage is essentially spiral-shaped, said spiral being either rectangular or arcuate.
Claim 13
Dependent Claim
34 words
A device as defined in claim 8 wherein said circuitous passage provides for successive horizontal and downward flow of said suspension the direction of horizontal flow being reversed after each section of downward flow.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |