Patent US5679265A successfully refreshed from Google Patents.
US5679265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for the separation of a contaminated top layer
Assignee: Suparator International BV
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Filing: 1993-08-24
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Granted: 1997-10-21
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Expires: 2013-08-24
Abstract
Abstract For the separation of a contaminated floating top layer of oil or oil substances, a continuous laminer flow is created on or near the surface, by placing a number of baffles (8, 8') in the path of the flowing liquid (V) as it moves through a tank (1). The total amount of liquid flowing through the tank (1) is now adjusted in such a way that the correct control of the upper laminar flow (5) and the dominant more turbulent lower flow near the bottom (9) of the tank (1) produces a controllable constant difference in height (delta h). This total difference in height (delta h) can also be attained by cascade operation.
Inventors
- 👤 Louis Van Schie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:52
CPC Classifications
E; E03; E03F; E03F5/00; E03F5/14; E03F5/16; B; B01; B01D; B01D17/00; B01D17/02; B01D17/0208; B01D17/0211; B01D17/0214; B01D21/00; B01D21/24; B01D21/2433; Y; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/923
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
185 words
A method for the separation of a floating layer of a lighter liquid from a heavier liquid supporting layer, comprising the steps of: causing a mixture of the lighter and heavier liquids to flow into a separating device formed by a channel-shaped tank with side walls and a bottom wall; obstructing the flow of the mixture in the tank with a baffle having a top end spaced from the top surface of the mixture so as to induce a laminar flow of primarily lighter liquid over the baffle into a collection chamber; providing at least one opening for flow of the lower heavier layer past the baffle proximate the bottom wall of the tank and into the collection chamber, the opening inducing turbulent flow downstream from the baffle; maintaining an interface between an upper laminar flow and a lower turbulent flow in the collection chamber below a separation layer between the lighter and heavier liquids; removing the lighter liquid from a point above the separation layer; and discharging the heavier liquid from the tank over a transfer wall positioned below the height of the baffle.
Claim 2
Independent Claim
185 words
A method for the separation of a floating layer of a lighter liquid from a heavier liquid supporting layer, comprising the steps of: causing a mixture of the lighter and heavier liquids to flow into a separating device formed by a channel-shaped tank with side walls and a bottom wall; obstructing the flow of the mixture in the tank with a baffle having a top end spaced from the top surface of the mixture so as to induce a laminar flow of primarily lighter liquid over the baffle into a collection chamber; providing at least one opening for flow of the lower heavier layer past the baffle proximate the bottom wall of the tank and into the collection chamber, the opening inducing turbulent flow downstream from the baffle; maintaining an interface between an upper laminar flow and a lower turbulent flow in the collection chamber below a separation layer between the lighter and heavier liquids; removing the lighter liquid from a point above the separation layer; and discharging the heavier liquid from the tank over a transfer wall positioned below the height of the baffle.
Claim 3
Dependent Claim
53 words
The method of claim 1, wherein said step of obstructing includes obstructing the flow of mixture, in the tank with at least two baffles, an upstream baffle being spaced higher than a downstream baffle so as to induce a cascade-like laminar flow of primarily lighter liquid over the baffles into said collection chamber.
Claim 4
Dependent Claim
27 words
The method of claim 1, further comprising the step of mixing light plastic-foam balls in said lighter liquid to enhance a separation efficiency of said separating device.
Claim 5
Dependent Claim
25 words
The method of claim 1, further including the steps of: adjusting the height of said baffle top end; and adjusting the size of said opening.
Claim 6
Dependent Claim
49 words
The method of claim 1, wherein said step of maintaining is enhanced by the step of positioning a perforated sheet horizontally in the region of said separation layer, the perforated sheet including a plurality of perforations some of which have a size which increases in a downstream flow direction.
Claim 7
Dependent Claim
58 words
The method of claim 1, further comprising the step of: inducing a venturi effect in the flow of the lower heavier layer past the baffle by spacing a bottom edge of the baffle from the bottom wall of the tank to form said opening and curving the bottom edge of the baffle upward in a downstream flow direction.
Claim 8
Dependent Claim
60 words
The method of claim 1, further comprising the steps of: metering the flow of lighter liquid over said baffle into said collection chamber with a movable valve unit positioned at the baffle top end; metering the discharge of the heavier liquid over said transfer wall with a second movable valve unit positioned at an upper end of said transfer wall.
Claim 9
Dependent Claim
39 words
The method of claim 7, further comprising the step of coupling the movement of the first and second valve units to coordinate the flow of lighter liquid into the collection chamber and discharge of heavier liquid from said device.
Claim 10
Dependent Claim
21 words
The method of claim 8, further comprising the step of adjusting the relative positions of the first and second valve units.
Claim 11
Dependent Claim
60 words
The method of claim 7, further comprising the step of: controlling the movement of the first and second valve units in tandem with a float fixedly attached to an adjusting rod mounted to couple the movement of the first and second valve units, the elevation of the float being determined by a level of water downstream of the transfer wall.
Claim 12
Dependent Claim
13 words
The method of claim 1, further comprising the step of heating said baffle.
Claim 13
Dependent Claim
31 words
The method of claim 1, further comprising the step of: removing undesired larger particles accumulated upstream of said first valve unit using a slowly rotating scraper unit mounted on said device.
Claim 14
Independent Claim
235 words
A device for separation of a floating layer of a lighter liquid from a heavier liquid supporting layer, comprising: channel-shaped tank with side walls and a bottom wall, and an inlet at one end for supplying a mixture of lighter and heavier liquids at a first elevation; a baffle positioned downstream of said inlet in the flow of said mixture in said tank and having a portion perpendicular to a downstream flow direction, the baffle having a top end positioned below said first elevation providing means to induce a laminar flow of primarily lighter liquid over the top of the baffle into a collection chamber provided in said tank, said baffle extending from said top end substantially the entire height of the tank to a bottom end proximate said bottom wall, said bottom end defining an opening providing means to induce turbulent flow of said heavier liquid into said collection chamber to join with said lighter liquid at a separation layer, said baffle inducing said laminar and turbulent flows in said collection chamber with an interface therebetween located below the separation layer between said lighter and heavier liquids; an outlet through which said lighter layer is removed from said collection chamber; and a transfer wall forming a downstream wall of said tank, a top end of said transfer wall being positioned below said first elevation to allow said heavier liquid to discharge from said tank.
Claim 15
Independent Claim
235 words
A device for separation of a floating layer of a lighter liquid from a heavier liquid supporting layer, comprising: channel-shaped tank with side walls and a bottom wall, and an inlet at one end for supplying a mixture of lighter and heavier liquids at a first elevation; a baffle positioned downstream of said inlet in the flow of said mixture in said tank and having a portion perpendicular to a downstream flow direction, the baffle having a top end positioned below said first elevation providing means to induce a laminar flow of primarily lighter liquid over the top of the baffle into a collection chamber provided in said tank, said baffle extending from said top end substantially the entire height of the tank to a bottom end proximate said bottom wall, said bottom end defining an opening providing means to induce turbulent flow of said heavier liquid into said collection chamber to join with said lighter liquid at a separation layer, said baffle inducing said laminar and turbulent flows in said collection chamber with an interface therebetween located below the separation layer between said lighter and heavier liquids; an outlet through which said lighter layer is removed from said collection chamber; and a transfer wall forming a downstream wall of said tank, a top end of said transfer wall being positioned below said first elevation to allow said heavier liquid to discharge from said tank.
Claim 16
Dependent Claim
59 words
The device of claim 13, further comprising: a second baffle positioned upstream of said first baffle, the second baffle having a top end positioned at a height between said first elevation and the top end of the first baffle to create a cascading laminar flow of said lighter liquid over said first and second baffles into said collection chamber.
Claim 17
Dependent Claim
36 words
The device of claim 13, wherein said opening is defined by a gap formed between the bottom end of said baffle and said bottom wall, the gap extending substantially between the side walls of said tank.
Claim 18
Dependent Claim
30 words
The device of claim 13, wherein said baffle contacts said bottom wall, and said openings are formed by at least two apertures formed in said baffle proximate said bottom wall.
Claim 19
Dependent Claim
52 words
The device of claim 13, further comprising: a rigid sheet attached to said tank and positioned approximately at said separation layer between the lighter and heavier flows in said collection chamber, said sheet provided with a plurality of perforations and adapted to enhance a laminar flow above and below the separation layer.
Claim 20
Dependent Claim
17 words
The device of claim 13, wherein said baffle to end is curved downward in an upstream direction.
Claim 21
Dependent Claim
27 words
The device of claim 18, wherein said baffle further comprises an upwardly sloped portion in an upstream direction between said curved top end and said perpendicular portion.
Claim 22
Dependent Claim
17 words
The device of claim 18, wherein said baffle to end is curved downward in a downstream direction.
Claim 23
Dependent Claim
33 words
The device of claim 18, wherein said baffle bottom end is spaced above said bottom wall of said tank to form said opening, said bottom end being curved upward in a downstream direction.
Claim 24
Dependent Claim
35 words
The device of claim 13, further comprising: a first movable valve unit mounted on said baffle top end for metering the amount of lighter liquid separated from said mixture and flowing into said collection chamber.
Claim 25
Dependent Claim
31 words
The device of claim 22, further comprising: a second movable valve unit mounted on the top of said transfer wall for metering the amount of heavier liquid discharged from said tank.
Claim 26
Dependent Claim
25 words
The device of claim 22, wherein said first movable valve unit and said second movable valve unit are attached to said tank at hinged joints.
Claim 27
Dependent Claim
17 words
The device of claim 24, wherein said hinged joints are formed by flexible strips of elastomeric material.
Claim 28
Dependent Claim
27 words
The device of claim 24, further comprising a coupling unit attached to said first and second movable valve units for coupling the movement of said valve units.
Claim 29
Dependent Claim
61 words
The device of claim 26, wherein said coupling unit comprises an adjustment rod attached to a pair of lever arms each coupled to pivot respectively with said first and second movable valve units, said lever arms being adjustable with respect to said adjustment rod to adjust the pivot angle of the first and second valve units with respect to one another.
Claim 30
Dependent Claim
68 words
The device of claim 24, further comprising a pair of lever arms coupled respectively to the movement of the first and second movable valve units, said lever arms being commonly joined to a float positioned downstream of said transfer wall, the elevation of the float being determined by the amount of heavier liquid flowing over the transfer wall and adjusting the first and second removable valve units accordingly.
Claim 31
Dependent Claim
14 words
The device of claim 13, further comprising a heating element provided in said baffle.
Claim 32
Dependent Claim
29 words
The device of claim 13, further comprising a rotating scraper unit positioned upstream of said collection unit to remove accumulated larger particles from said upper layer of lighter liquid.
Claim 33
Dependent Claim
45 words
The device of claim 13, further including an adjustable valve positioned upstream of said baffle at a height between said first elevation and the top end of the baffle to meter the amount of upper lighter liquid flowing over said valve unit to said baffle.
Claim 34
Dependent Claim
13 words
The device of claim 13, wherein said outlet is defined by a standpipe.
Claim 35
Dependent Claim
18 words
The device of claim 13, wherein said outlet is defined by a pipe subject to an external suction.
References Cited (Backward Citations)
GB443601A
Cited
US2284737A
Cited
US2831579A
Cited
US3708070A
Cited
US4064034A
Cited
US4253965A
Cited
US3971719A
Cited
US4132652A
Cited
US4213865A
Cited
DE2837554A1
Cited
US4400274A
Cited
US4422931A
Cited
DE3303632A1
Cited
DE3516895A1
Cited
DE3702482A1
Cited
DE3732136A1
Cited
GB2216821A
Cited
WO1990014874A1
Cited
US4980070A
Cited
US5308510A
Cited
US5236589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-10-20 | 2001-04-21 | 2001-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-10-20 | 2005-04-21 | 2005-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-10-20 | 2009-04-21 | 2009-10-21 | $7700.00 | Window Closed / Lapsed |