US20080290010A1 - Oil water coalescing separator - Google Patents
Oil water coalescing separator Download PDFInfo
- Publication number
- US20080290010A1 US20080290010A1 US12/185,558 US18555808A US2008290010A1 US 20080290010 A1 US20080290010 A1 US 20080290010A1 US 18555808 A US18555808 A US 18555808A US 2008290010 A1 US2008290010 A1 US 2008290010A1
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- US
- United States
- Prior art keywords
- separator
- magnet base
- oil
- coalescing
- back panel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/04—Breaking emulsions
- B01D17/045—Breaking emulsions with coalescers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/08—Thickening liquid suspensions by filtration
- B01D17/10—Thickening liquid suspensions by filtration with stationary filtering elements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S210/00—Liquid purification or separation
- Y10S210/05—Coalescer
Abstract
An oil water coalescing separator has a coalescing chamber containing oil coalescing media. The separator is preferably substantially transparent so that the thickness of the band of coalesced tramp oil can be visually discerned at a glance. The separator preferably has a magnet base so the separator can be hung on a machine off the floor. The separator is also removable from the magnet base.
Description
- The present invention relates to a separator for separating oil from oily water, such as contaminated metalworking fluid or coolant or cleaner fluid.
- Computer controlled and manual controlled machines are commonly used for cutting metal. Metalworking fluid or coolant is delivered to the point of cutting to provide lubricity, cooling and removal of metal chips being generated by the machining process. The coolant is predominately water but gradually gets contaminated with oily materials such as hydraulic fluids, lubricants and greases. The coolant must periodically be rejuvenated by removing the tramp oil that collects in the water-based coolant or metalworking fluid. Oil-contaminated water is also produced in industrial manufacturing plants by manufacturing processes such as molding operations, metalworking, heat-treating, pretreatment, lubricating applications, machining operations, food processing, etc. Oil-contaminated water is also produced or found in wastewater, refineries, offshore production facilities, parking lots, garages, service facilities, and outdoor waters (such as oil spills), ponds, lakes, basins, waterways etc. The contents of U.S. Pat. Nos. 6,641,738 and 5,458,817 are incorporated herein by reference. An improved oil water coalescing separator is needed to separate the oil from the oil-contaminated water.
- An apparatus for separating oil from an oil water mixture is provided. The apparatus comprises an oil water coalescing separator having a coalescing chamber having a sidewall. The coalescing chamber contains oil coalescing media. The separator has during operation a band of collected tramp oil having a thickness and floating on top of an aqueous fluid. The band has a bottom surface and at least a portion of the sidewall is sufficiently transparent or translucent so that the location of said bottom surface can be visually discerned through said portion by an unaided eye of an ordinary observer standing 8 feet away in ordinary lighting conditions.
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FIG. 1 is an exploded view of an oil water coalescing separator according to the invention. -
FIG. 2 is a front-right-top perspective view of the separator ofFIG. 1 with thefront panel 12 removed to more clearly show the interior. -
FIG. 3 is a front elevational view of the separator ofFIG. 2 with thefront panel 12 present. -
FIG. 4 is a right side elevational view of the separator ofFIG. 3 . -
FIG. 5 is a cross-sectional view taken along line 5-5 ofFIG. 4 . -
FIG. 6 is an exterior elevational view of the magnet base of the separator ofFIG. 2 . -
FIG. 7 is a plan view of a piece of felt with a magnet in each corner. -
FIG. 8 is a schematic illustration of a band of collected oil floating on top of an aqueous fluid in the invented separator. -
FIG. 9 is a right side elevational view of a cam release lever. -
FIG. 10 is a back elevational view of the cam release lever ofFIG. 9 . -
FIG. 11 is a side elevational view of a long nosed latch. -
FIG. 12 is cross-sectional view taken along line 12-12 ofFIG. 11 . - In the description that follows, when a preferred range, such as 5 to 25 (or 5-25), is given, this means preferably at least 5 and, separately and independently, preferably not more than 25. In the Figures, the panels and internal walls and tubes of the separator are generally shown as opaque so the assembly can be more easily understood, but preferably they are transparent or translucent. As used herein, transparent means letting light pass through so that objects on the other side can be clearly distinguished; translucent means letting light pass through but diffusing it so that objects on the other side cannot be clearly distinguished. As used herein, an ordinary observer is an ordinary worker in a plant or factory which would typically use an oil water coalescing separator such as described herein; an unaided eye is one that has normal 20/20 vision without additional assistance such as additional lenses, magnification lenses, filters, binoculars, telescopes, etc; ordinary lighting conditions means the ordinary lighting conditions which typically prevail during normal working hours at locations where an oil water coalescing separator such as described herein would typically be used. As used herein, tramp oil includes oil or oily material which is removed or separated from aqueous fluids contaminated with oil or oily material.
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FIGS. 1-3 and 5 show an apparatus for separating oil from an oil water mixture; the apparatus includes an oilwater coalescing separator 10 and aprefilter 24. With reference toFIGS. 1-6 , there is shown an oilwater coalescing separator 10 having a front or front panel orfront wall 12, a right side orright side panel 14, a left side orleft side panel 16, a back orback panel 18, atop 20 and abottom 22. Preferably aprefilter 24, such as a 10-inch commercial clear housing filter from Flowmatic (75 microns preferred), is attached as shown to theseparator 10.Separator 10 has a coalescingchamber 26 betweenleft side panel 16 andright chamber wall 30. The coalescingchamber 26 contains oil coalescing media, preferablyporous packing 32 made of polypropylene, such as Product HD Q-PAC (this product is porous packing) from Lantec Products, Inc. (www.lantecp.com and telephone number 781-769-1901) or as described in U.S. Pat. No. 5,458,817.Porous packing 32, such as Product HD Q-PAC, preferably has a specific surface area of at least 30, 50, 60, 70, 80, 90, 100, 120, 130 or 132, ft2 per ft3, a void fraction of at least 50, 60, 70, 80, 85 or 87, percent, and smallest gap of less than 6×6 or 5×5 mm, or about 4×4 mm. Less preferably, the oil coalescing media can be ⅝″ diameter or other size polypropylene balls from Hoover Precision Products, or other oil coalescing media as known in the art, preferably polypropylene.Porous packing 32 can be held in place byretainer 28 and hold downplate 29. If the oil coalescing media is polypropylene balls, they can be held in place by a horizontal perforated plate located where the top surface ofpacking 32 is shown inFIGS. 2 and 5 . - The
separator 10 operates as follows. The oil water mixture to be separated enters theprefilter 24 as shown atarrow 34. Theprefilter 24 removes solids in the fluid. The mixture travels viapath 36 through tube orchannel 38 into theseparator 10 and then descends viaelbow 40 and tube orpassageway 41 into the coalescingchamber 26. Once the oily water enters the coalescingchamber 26, it flows left to right through theporous packing 32, contacting and coalescing on the surfaces of the oil coalescing media, then exiting the coalescingchamber 26 throughopening 46 provided in the bottom ofchamber wall 30. The rejuvenated fluid or coolant then flows viapath 48 up over thetop 50 ofoverflow wall 52 and then descends viapath 54 and out through an opening 56 inright side panel 14 and throughoutlet pipe 58 to emerge as rejuvenated fluid or coolant. Optionally, one or more baffles or deflector plates can be provided in coalescingchamber 26 in order to force the fluid through more of the oil coalescing media in order to increase separation efficiency. - The oil or tramp oil in the oily water fluid tends to coalesce on the hydrophobic/oleophilic surfaces of the oil coalescing media or
porous packing 32 and coalesces into larger droplets, which, due to their buoyancy, rise toward the top of the coalescingchamber 26. The tramp oil droplets rise to a level shown by dashed line 62 (the location of which is determined by the height of overflow wall 52) but can rise no higher due to the height and position oftop 50 ofoverflow wall 52. As more tramp oil floats up and collects, the band of tramp oil, with its top surface always at or approximately atline 62, becomes thicker and thicker, gradually filling part or all of the space betweenline 62 and the top of packing 32 (it can even extend into the top of packing 32), resulting in a band of collected tramp oil which can be several inches thick. When enough tramp oil has collected beneathline 62, one or both ofvalves front panel 12 and through thevalves - The
portable separator 10 can be drained viadrain valve 70 and lifted and carried viahandle 72. To gain access to theporous packing 32 for cleaning, replacement or servicing, unscrew thethumbscrews retainer 28 and plate 29 (seeFIG. 1 )). - Valve 66 drains tramp oil through a hole in
front panel 12, the location of which is shown atsuperimposed hole 82. The hole forvalve 68 is shown atsuperimposed hole 84. Note thatline 62 goes through the center ofhole 82 and passes over the top ofhole 84.FIG. 8 shows schematically aband 86 of collected or coalesced tramp oil floating on top ofaqueous fluid 87 after coalesced oil droplets have floated up and coalesced. Theband 86 has abottom surface 88, which is the substantially planar interface between the oil and aqueous phases.Valve 66 andvalve 68 should only be opened when the entirety of the correspondinghole band 86 of tramp oil; otherwise, some of aqueous fluid (good coolant) 87 will be discharged. Each ofvalves surface 88 reaches the bottom ofhole hole 84,hole 82, since it is located higher, will permit more of the band of tramp oil to be drained off, but it will drain off more slowly than throughhole 84. The locations ofholes line 62. - With reference to
FIGS. 1 , 2, 4 and 6,separator 10 has aback panel 18 on which is mounted amagnet base 42, which has four recesses each about ⅜″ deep, each recess holding around magnet FIG. 1 ) to prevent the magnet from scratching machinery or surfaces that the magnet contacts. Alternatively, a round cover of cloth or felt the same diameter as the magnet can be adhesively attached to the surface of the magnet to protect machinery from scratches, or as shown inFIG. 7 , a piece offelt 64 about 20″×15″ withsmall magnets felt 64 is magnetically attached to the machine or steel surface and the magnets of the separator are placed over the felt so the machine is protected from scratches. The magnets on the magnet base are strong enough to permit the separator with prefilter to be held securely during normal operation or use off the floor or ground on a vertical steel surface, such as a steel machine housing. Being able to hang the separator on machines via magnets frees up valuable floor space, hangs the separator at or near eye level for ergonomic optimization and removing tramp oil without bending over, and makes cleaning the floor easier. (Alternatively, instead of the magnets, hooks, flanges, fasteners, straps or other attachment mechanisms as known in the art can be added to the separator to attach it to or hang it from a machine or other structure at its place of use.) To help pry theseparator 10 off a machine that it is magnetically attached to, atlocations 46 and 47 (seeFIG. 6 ) there is mounted a prying releasor such as acam release lever 49, such as shown inFIGS. 1 , 2, 9 and 10. InFIGS. 9 and 10 ,cam release lever 49 has alever arm 77, ahub 78, a pair ofarms lever 49 rotates, and acam arm 81 having arubber tip 75. In use,lever cam 77 inFIG. 9 is pushed or rotated to the left, forcingcam arm 81 to move or rotate to the right so thattip 75 pushes against the steel surface or machine and helps pry the magnets free from the steel. - With reference to
FIG. 1 , the front portion ofseparator 10 can be attached tomagnet base 42 via a pair of long bolts terminated with nuts or knobs (not shown) which extend from front panel 12 (seebolt holes panel 12 inFIG. 3 ) through each of cross hanger supports 60, 61, throughback panel 18 and through the correspondingholes FIG. 1 ). More preferably, the front portion ofseparator 10 is removably attached or latched tomagnet base 42 via a pair of long-nosed latches, as illustrated inFIGS. 11 and 12 . With reference toFIGS. 11 and 12 , there is shown a long-nosed latch 91 having a bolt portion 97 (having abolt head 92 and a threaded end 93) threadingly attached to a latchinghead 94 via a female threadedopening 96 inhead 94.Head 94 has an extending or dependinglip 95. A pair oflatches 91 are extended through cross hanger supports 60, 61 with thebolt head 92 engagingfront panel 12.Head 94 is about 1 in. in diameter and accordingly, corresponding holes slightly larger than 1 in. in diameter are provided inmagnet base 42 at the locations identified byholes latch 91, extendbolt portion 97 throughfront panel 12, through the cross hanger support and throughback panel 18; then screw latchinghead 94 onto threadedend 93. Once bothlatches 91 are in position opposite the holes at 90 a and 90 b, push heads 94 through the holes until the extendinglip 95 extends beyond and drops down to catch on the far side ofmagnet base 42. The extendinglips 95 will latch onto the back ofmagnet base 42 to holdseparator 10 in place. To removeseparator 10, simply lift up until the extendinglips 95 disengage, then pullheads 94 back through the openings. -
Separator 10 preferably has a height of 10-30, 12-20, 13-16, or about 14, inches, a length of 10-36, 13-28, 16-22, or about 18, inches, a depth or width of 2-10, 3-8, 3.5-6, 3.5-5, or about 4, inches and preferably holds about 1-20, 1-15, 1-10, 1.5-7, 1.7-5, 1.9-4, 2-3, 2.2-2.8, or about 2.5, gallons of fluid during normal operation and preferably holds less than 20, 15, 10, 7, 5, 4 or 3 gallons of fluid during normal operation. -
Prefilter 24 receives contaminated coolant from a pump pumping from a sump; the pump can be such as Little Giant Model No. 3E-12N, having a flow rate of 500 gal/hr. (but more typically 300-400 gal/hr. due to the height of the separator above the pump. The pump forces fluid through the prefilter and intoseparator 10. The presence of the pump tends to create (when it is turned off) a negative pressure or sucking in the feed line into the prefilter and thus in the prefilter and thus in tube orpassageway 41, which tends to suck contaminated fluid from the coalescingchamber 26 back into theprefilter 24. To prevent this, and also to otherwise prevent fluid inchamber 26 from flowing back into the prefilter, acheck valve 51 can be provided as part of tube orchannel 38. Alternatively or in addition, a check valve can be placed at the inlet to theprefilter 24 or at the bottom of tube orpassageway 41. - Preferably as much of the
separator 10 as possible is made of transparent (or less preferably translucent) materials, such as transparent abrasion resistant acrylic or other transparent plastic. Preferablyfront panel 12,right side panel 14,left side panel 16, backpanel 18, top 20, bottom 22,magnet base 42, handle 72,retainer 28,plate 29,right chamber wall 30,overflow wall 52,elbow 40,passageway 41, and cross hanger supports 60, 61 are made of transparent plastic as described above, less preferably of translucent material or translucent plastic. As shown in the Figures, coalescingchamber 26 has a sidewall surrounding it consisting offront panel 12, aleft side panel 16, aright chamber wall 30, and aback panel 18. Preferably this sidewall, and the other panels and parts of the separator are sufficiently transparent or translucent so that the location of the bottom surface of the band of tramp oil, and the thickness of the band, can be visually discerned (preferably at a glance) by an unaided eye of an ordinary observer standing 2, 3, 4, 5, 6, 7, 8, 10, 12, 15, 18 or 20 feet away in ordinary lighting conditions. Preferably the parts of the separator are of sufficient transparency or translucency effective to permit the separator to be used for its intended purpose and effective to permit an unaided eye of an ordinary observer standing 2, 3, 4, 5, 6, 7, 8, 10, 12, 15, 18 or 20 feet away in ordinary lighting conditions to visually discern (preferably at a glance) the location of the bottom surface of the band of tramp oil and the thickness of the band. - As shown in
FIG. 3 ,right side 14 faces 90° away from thedirection front 12 faces. - Although the preferred embodiments have been described, various modifications may be resorted to without departing from the scope of the invention as disclosed and claimed herein.
Claims (15)
1-13. (canceled)
14. An apparatus for separating oil from an oil water mixture, said apparatus comprising an oil water coalescing separator having a coalescing chamber having a sidewall, said coalescing chamber containing oil coalescing media, said separator containing during operation an aqueous fluid and a band of collected tramp oil having a thickness and floating on top of said aqueous fluid, said band having a bottom surface, at least a portion of said sidewall being sufficiently transparent or translucent so that the location of said bottom surface can be visually discerned through said portion by an unaided eye of an ordinary observer standing 8 feet away in ordinary lighting conditions, said separator being joined to two or more magnets effective to hold said separator during normal operation off a floor on a vertical steel surface, said separator having a back panel, said two or more magnets being mounted outside said aqueous fluid and spaced apart on a magnet base, said magnet base being located adjacent to but distinct from said back panel.
15. The apparatus of claim 14 , said separator having a front, at least the top half of said front being transparent or translucent.
16. The apparatus of claim 14 , said separator having a front, a right side, a left side, and a back, each of said front, said right side, said left side, and said back being transparent.
17. The apparatus of claim 14 , said magnet base being releasably joined to said separator such that said separator may be released from said magnet base without moving said magnet base from its location during normal operation.
18. The apparatus of claim 14 , said separator having a handle for portability, said separator holding less than 5 gallons of fluid during normal operation.
19. The apparatus of claim 14 , said oil coalescing media being porous packing.
20. The apparatus of claim 19 , said porous packing having a specific surface area of at least 70 ft2 per ft3.
21. The apparatus of claim 14 , further comprising a prying releasor effective to release said magnet base from a vertical steel surface.
22. The apparatus of claim 14 , wherein said separator is releasably latched to said magnet base.
23. The apparatus of claim 14 , said magnet base having a front which is adjacent said back panel and a back which is spaced apart from said back panel, wherein said separator is releasably latched to said magnet base by a latch comprising a bolt portion and an extending lip which engages the back of the magnet base to hold the separator in place.
24. The apparatus of claim 14 , said separator having a valve which has an open position and a closed position, said valve, when opened, permitting said collected tramp oil to flow out of said separator.
25. The apparatus of claim 14 , wherein said magnet base is planar.
26. The apparatus of claim 14 , wherein said magnet base and said back panel abut each other.
27. The apparatus of claim 14 , wherein said separator is attached to said magnet base at at least two locations.
Priority Applications (1)
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US12/185,558 US20080290010A1 (en) | 2006-03-21 | 2008-08-04 | Oil water coalescing separator |
Applications Claiming Priority (2)
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US11/385,554 US7416657B2 (en) | 2006-03-21 | 2006-03-21 | Oil water coalescing separator |
US12/185,558 US20080290010A1 (en) | 2006-03-21 | 2008-08-04 | Oil water coalescing separator |
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US11/385,554 Continuation US7416657B2 (en) | 2006-03-21 | 2006-03-21 | Oil water coalescing separator |
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US20080290010A1 true US20080290010A1 (en) | 2008-11-27 |
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US11/385,554 Active 2026-06-17 US7416657B2 (en) | 2006-03-21 | 2006-03-21 | Oil water coalescing separator |
US12/185,558 Abandoned US20080290010A1 (en) | 2006-03-21 | 2008-08-04 | Oil water coalescing separator |
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US (2) | US7416657B2 (en) |
EP (1) | EP2029250A4 (en) |
JP (1) | JP2009530104A (en) |
CA (1) | CA2646949A1 (en) |
WO (1) | WO2007109158A2 (en) |
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WO2012004201A1 (en) * | 2010-07-09 | 2012-01-12 | Mahle International Gmbh | Phase separating device |
WO2017117563A1 (en) * | 2015-12-31 | 2017-07-06 | Abanaki Corporation | Apparatus and method for fluid separation and filtering |
Also Published As
Publication number | Publication date |
---|---|
WO2007109158A3 (en) | 2007-11-22 |
WO2007109158A2 (en) | 2007-09-27 |
EP2029250A2 (en) | 2009-03-04 |
US7416657B2 (en) | 2008-08-26 |
EP2029250A4 (en) | 2013-04-17 |
US20070221553A1 (en) | 2007-09-27 |
CA2646949A1 (en) | 2007-09-27 |
JP2009530104A (en) | 2009-08-27 |
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