CN105413238B - A kind of oil water separator - Google Patents
A kind of oil water separator Download PDFInfo
- Publication number
- CN105413238B CN105413238B CN201510993976.8A CN201510993976A CN105413238B CN 105413238 B CN105413238 B CN 105413238B CN 201510993976 A CN201510993976 A CN 201510993976A CN 105413238 B CN105413238 B CN 105413238B
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- oil
- upper exterior
- inner tube
- exterior tube
- tube
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- 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
- B01D17/0208—Separation of non-miscible liquids by sedimentation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Removal Of Floating Material (AREA)
Abstract
The invention discloses a kind of oil water separator, including upper exterior tube and lower outer pipe, and upper exterior tube is connected with lower outer pipe by least one standpipe；The affixed oil slick pipe axially extended in upper exterior tube top, upper exterior tube top offers the oil-out of connection upper exterior tube and oil slick pipe；Be socketed with upper exterior tube inner tube and upper inner tube axis be located at upper exterior tube axis vertical direction；The bottom of upper inner tube offers delivery port, and delivery port carefully stitches for apopore/water outlet.Beneficial effects of the present invention are：The miniaturization of oil water separator is ensure that, the stability of dehydration quality is in turn ensure that, increases substantially the efficiency of gravitational settling, the construction costs of separation facility at present is considerably reduced.
Description
Technical field
The present invention relates to oil field oil water mixed liquor processing technology field, and in particular to a kind of oil water separator.
Background technology
Oil field produce crude oil while also the substantial amounts of natural gas of output and water, it is necessary to enter to crude oil, gas and water three-phase fluid
Row separation.Crude oil dehydration equipment is then the embodiment of dehydration technique, and it occupies critical role in crude oil dehydration.It is dehydrated skill
Art, device structure it is whether reasonable, be directly connected to the quality of the effect, efficiency and crude oil of dehydration, and production run cost,
And then influence total economic benefit of crude oil dehydration production.
Oily water separation technique mainly has three types in principle：I.e. aggregation method, settling methods or centrifugation force method, real
Often using more than two kinds of the specific separating technology of principle composition in trampling, but change ten thousand times without leaving the original aim or stand, it is in office where in method,
It can't do without the effect of gravitational settling, if improving the efficiency of gravitational settling, the separative efficiency with regard to oil field output object can be improved.
The conventional dewatering process in current oil field is " heat chemistry settling method ", i.e., after heating, dosing come liquid enter again big tank or
Three-phase oil, gas and water separator carry out sedimentation degassing, dehydration.Produce stable when being dehydrated with this mode, convenient management.But it is increase
Sedimentation time is, it is necessary to which very big tank holds and floor space.
Although the dehydration equipment of centrifugal process and ladder type pipe partition method has small volume, the high advantage of separative efficiency, by reality
Operating " the turbulent flow or channelling " influence in border, causes disintegrate-quality and stability also unsatisfactory, therefore, in oil field dewatering process
In also fail to obtain large-area applications.
The content of the invention
To solve the technological deficiency for also carrying out oil field oil water mixed liquor processing without more complete equipment in the prior art,
The present invention designs a kind of oil water separator, realizes the crude oil efficiently separated in oil field oil water mixed liquor, the purpose of water, improves
Separative efficiency.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of oil water separator, including upper exterior tube and lower outer pipe, and upper exterior tube and lower outer pipe pass through at least one standpipe phase
Connection；Upper exterior tube top is connected with the oil slick pipe axially extended, and upper exterior tube top offers connection upper exterior tube and oil slick pipe
Oil-out.The oil water separator effectively realizes crude oil in oil field oil water mixed liquor, point of water according to sedimentation theory
From.
It is preferred that, oil-out is oil outlet or fuel-displaced thin seam.Oil-out is used to turn on upper exterior tube and oil slick pipe, and this is in
Cut thin seam or the axis direction punching on the top of upper exterior tube along upper exterior tube in outer tube top.Because cutting thin seam or beating
Hole can prevent channelling.
Further, the axis of inner tube and upper inner tube is socketed with upper exterior tube positioned at the vertical of the axis of upper exterior tube
Top.The bottom of upper inner tube offers delivery port.Delivery port is that apopore or water outlet are carefully stitched.Produced with " pipe middle sleeve " mode shallow
Pond effect；Cause Reynolds with " bias is placed " (axis of i.e. upper inner tube is located at the vertical direction of the axis of upper exterior tube) mode
Number change.Turbulent flow is easily produced soon because there is flow velocity, the problem of separative efficiency is relatively low is caused, and the separator is according to " fluidised form is managed
By ", take pipe middle sleeve and place upper inner tube bias, the cross-sectional area using eccentric annulus " selenodont " runner gradually becomes
Small, the characteristics of Reynolds number also diminishes therewith forms laminar flow at narrow gap.
Further, it is connected with the inwall of upper inner tube on dividing plate, and dividing plate and offers through hole.To being sunk caused by small volume
The problem of drop time is not enough, according to " shallow pool theory ", tubular type flow is made by oil water separator, the same of fluid level is reduced
When the invalid sedimentation time is reduced by dividing plate, dividing plate can also reduce fluidised form produce it is disorderly.
Further, the axis of lower inner tube and lower inner tube is socketed with lower outer pipe positioned at the vertical of the axis of lower outer pipe
Lower section.Lower inner tube bottom offers water inlet.Water inlet is inlet opening or the thin seam of water inlet.Shallow pond is produced with " pipe middle sleeve " mode
Effect；There is Reynolds number change with " bias is placed " mode.Turbulent flow is easily produced soon because there is flow velocity, causing separative efficiency relatively low
The problem of, the separator takes pipe middle sleeve and places lower inner tube bias, utilize eccentric annulus according to " Theory of Flow Pattern "
The cross-sectional area of " selenodont " runner is tapered into, the characteristics of Reynolds number also diminishes therewith, and laminar flow is formed at narrow gap.
The invention also discloses a kind of oil field oil water mixing liquid separating method, comprise the following steps：(1), using " gravity sinks
Drop method " carries out initial gross separation to the crude oil in oil field oil water mixed liquor and water, and the dirt of sedimentation is directly collected during initial gross separation
The crude oil of water and floating；(2), the sewage of sedimentation in step (1) and the crude oil floated are carried out using " settling methods " secondary
Separation, collects the more pure crude oil floated and the more pure water of sedimentation respectively during secondary separation.
Further, step (1) and initial gross separation and the synchronously progress of secondary separation process in step (2), and unified receipts
The crude oil floated during collection initial gross separation and secondary separation.Secondary separation process described herein is actually one lasting
The process of separating for several times, in fluid along during pipe flow forward, by standpipe, heavier water can be settled, and lighter oily meeting
Float.
Beneficial effects of the present invention are：The oil water separator is the miniaturization that ensure that oil water separator, be in turn ensure that de-
The stability of water quality, increases substantially the efficiency of gravitational settling, the oil water separator is widely used in into oil field output
Water-oil separating, water sand separation and the sewage disposal process of thing, can be greatly lowered the construction costs of separation facility and reduction at present
Operating cost；According to " shallow pool theory ", oil water separator is made into tubular type flow, by reduce fluid level and by every
Plate can reduce the invalid sedimentation time；According to " Theory of Flow Pattern ", pipe middle sleeve and eccentric setting are taken, eccentric annulus is utilized
The cross-sectional area of " selenodont " runner is tapered into, the characteristics of Reynolds number also diminishes therewith, and laminar flow is formed at narrow gap；
Realize the purpose of the crude oil efficiently separated in oil field oil water, water.Slot mode is taken in pipe to reduce point according to " flow resistance theoretical "
The profit opened is re-mixed because of channelling.The oil field oil water separation method uses merely the principle of gravitational settling, it is not necessary to very big
Tank hold and floor space, it is economical and practical.
Brief description of the drawings
Fig. 1 is the structural representation of the first embodiment of oil water separator of the present invention；
Fig. 2 is the structural representation of the second embodiment of oil water separator of the present invention；
Fig. 3 is Fig. 2 side view.
In figure,
1st, oil slick pipe；2nd, upper exterior tube；21st, oil-out；3rd, upper inner tube；31st, delivery port；4th, dividing plate；41st, through hole；5th, standpipe；
6th, lower outer pipe；7th, lower inner tube；71st, water inlet.
Embodiment
Explanation is explained in detail in the structure to the present invention below in conjunction with the accompanying drawings.
As shown in figure 1, the first embodiment of oil water separator of the present invention is shown, including upper exterior tube 2 and lower outer pipe
6, and upper exterior tube is connected with lower outer pipe by least one standpipe 5；Upper exterior tube top is connected with the oil slick pipe axially extended
1, upper exterior tube top offers the oil-out 21 of connection upper exterior tube and oil slick pipe.The oil water separator is according to the original of gravitational settling
Reason, effectively realizes the separation of the crude oil, water in oil field oil water.
As Figure 2-3, the second embodiment of oil water separator of the present invention is shown, including upper exterior tube 2 and lower outer
Pipe 6, and upper exterior tube is connected with lower outer pipe by least one standpipe 5；Upper exterior tube top is connected with the oil slick axially extended
Pipe 1, upper exterior tube top offers the oil-out 21 of connection upper exterior tube and oil slick pipe.The oil water separator is according to the original of gravitational settling
Reason, effectively realizes the separation of the crude oil, water in oil field oil water.Oil-out is oil outlet or fuel-displaced thin seam.Cut on upper exterior tube
Thin seam or punching can prevent channelling.
The axis that inner tube 3 and upper inner tube are socketed with a kind of oil water separator that the present invention is provided, upper exterior tube is located at
The vertical direction of the axis of upper exterior tube, makes the toric space between its inner and outer pipes turn into upward " selenodont " runner of cusp.On
The bottom of inner tube offers delivery port 31.Delivery port is that apopore or water outlet are carefully stitched.Shallow pond effect is produced with " pipe middle sleeve " mode
Should；There is Reynolds number change with " bias is placed " mode.Turbulent flow is easily produced soon because there is flow velocity, causing separative efficiency relatively low
Problem, the separator takes pipe middle sleeve and places upper inner tube bias, utilize the horizontal stroke of eccentric annulus according to " Theory of Flow Pattern "
Sectional area is tapered into, the characteristics of Reynolds number also diminishes therewith, and laminar flow is formed at narrow gap.
Dividing plate 4 is connected with a kind of oil water separator that the present invention is provided, the inwall of upper inner tube, and is offered on dividing plate logical
Hole 41.To the sedimentation time deficiency problem caused by small volume, according to " shallow pool theory ", oil water separator is made into tubular type flow,
The invalid sedimentation time is reduced by dividing plate while fluid level by reducing, it is disorderly that dividing plate can also reduce fluidised form generation
Disorderly.
The axis that lower inner tube 7 and lower inner tube are socketed with a kind of oil water separator that the present invention is provided, lower outer pipe is located at
The vertical lower of the axis of lower outer pipe, makes the toric space between its inner and outer pipes turn into downward " selenodont " runner of cusp.Under
Inner tube bottom offers water inlet 71.Water inlet is inlet opening or the thin seam of water inlet.Shallow pond effect is produced with " pipe middle sleeve " mode；
Reynolds number is limited with " bias is placed " mode to change.Turbulent flow is easily produced soon because there is flow velocity, causing that separative efficiency is relatively low to ask
Topic, the separator takes pipe middle sleeve and places lower inner tube bias, utilize the transversal of eccentric annulus according to " Theory of Flow Pattern "
Area is tapered into, the characteristics of Reynolds number also diminishes therewith, and laminar flow is formed at narrow gap.
When specifically installing and using, as long as being entered the station in original liquid on pipeline plus after a direct-through valve, by the oil water separator
Flow is installed in parallel with former pipeline, you can in the case of motionless to original flow, runs new dewatering type；Single group profit point
Disposal ability from device is determined by caliber, flow velocity and liquid property, when treating capacity is excessive or can't meet the quality requirement, can be by again
The mode of one group of oil water separator is solved in parallel or series.
A kind of oil water separator that the present invention is provided, operation principle is as follows：Oil field oil water mixed liquor enters simultaneously from upper inner tube
Flow forward, low-density crude oil upper exterior tube top oil slick pipe, on inner tube flow out forward after enter petroleum tank.High density water mistake
After amount discharge, enter water after being flowed out before the lower inner tube of water inlet → entrance of delivery port → standpipe through upper inner tube → lower inner tube is backward
Tank.Now because the annular space sectional area of water inlet is smaller, it can prevent from entering the water band crude oil in lower inner tube.
The part crude oil taken out of from the delivery port of upper inner tube by excessive draining forms water to oil area in standpipe, mistake
Cross with after oil-out of the top crude oil through upper exterior tube → oil slick pipe enter petroleum tank.Now because of annular space face at the oil-out of upper exterior tube
Product is smaller, can prevent from intaking in crude oil.
Oil field oil water mixed liquor enters and flow forward from upper inner tube, in flow process oil field oil water mixed liquor through dividing plate,
A large amount of oil-polluted waters flow into upper exterior tube from the delivery port of upper inner tube, and now because density is different, lighter crude oil is through upper exterior tube
Oil-out flows into the discharge of oil slick pipe, and the wet crude flowed axially forward in upper inner tube, heavier water enters through delivery port
Upper exterior tube, flows into lower outer (interior) pipe by standpipe and discharges and (flowed axially forward in lower outer pipe).(due to density, gravity
Effect, upper inner tube will be based on crude oil, and lower inner tube will be based on water) (due to density, the effect of gravity, in flow process, on
Water in inner tube crude oil can be sunk down into lower outer pipe automatically when flowing through standpipe；Crude oil in lower outer pipe water, is flowing through standpipe
When, can float automatically enter oil slick pipe by the oil-out of upper exterior tube).
A kind of oil field oil water mixing liquid separating method that the present invention is provided, comprises the following steps：(1), using " gravitational settling
Method " carries out initial gross separation to the crude oil in oil field oil water mixed liquor and water, and the sewage of sedimentation is directly collected during initial gross separation
And the crude oil floated；(2) secondary point, is carried out to the sewage of sedimentation in step (1) and the crude oil floated using " settling methods "
From the more pure water collected the more pure crude oil of floating during secondary separation respectively and settled.
Initial gross separation in a kind of oil field oil water mixing liquid separating method that the present invention is provided, step (1) and step (2) and
Secondary separation process is synchronously carried out, and the crude oil floated during unified collection initial gross separation and secondary separation.Described herein
Secondary separation process is actually the process of a lasting separating for several times, during forward fluid motion, heavier water meeting
Sedimentation, and lighter oil can float.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Any modification, equivalent and simple modifications for being made in content etc., should be included within the scope of the present invention.
Claims (3)
1. a kind of oil water separator, it is characterised in that including upper exterior tube (2) and lower outer pipe (6), and upper exterior tube and lower outer pipe pass through
At least one standpipe (5) is connected；The affixed oil slick pipe (1) axially extended in upper exterior tube top, upper exterior tube top offers company
The oil-out (21) of logical upper exterior tube and oil slick pipe, oil-out is oil outlet or fuel-displaced thin seam；Inner tube (3) is socketed with upper exterior tube
And the axis of upper inner tube is located at the vertical direction of the axis of upper exterior tube；The bottom of upper inner tube offers delivery port (31), goes out
The mouth of a river is that apopore or water outlet are carefully stitched.
2. a kind of oil water separator according to claim 1, it is characterised in that be connected with dividing plate on the inwall of upper inner tube
(4) through hole (41), and on dividing plate is offered.
3. a kind of oil water separator according to claim 1, it is characterised in that be socketed with lower outer pipe lower inner tube (7) and
The axis of lower inner tube is located at the vertical lower of the axis of lower outer pipe；Lower inner tube bottom offers water inlet (71), water inlet
For inlet opening or the thin seam of water inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510993976.8A CN105413238B (en) | 2014-07-14 | 2014-07-14 | A kind of oil water separator |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410332802.2A CN104069650B (en) | 2014-07-14 | 2014-07-14 | A kind of water-and-oil separator and oil field oil water mixed solution separation method |
| CN201510993976.8A CN105413238B (en) | 2014-07-14 | 2014-07-14 | A kind of oil water separator |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410332802.2A Division CN104069650B (en) | 2014-07-14 | 2014-07-14 | A kind of water-and-oil separator and oil field oil water mixed solution separation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105413238A CN105413238A (en) | 2016-03-23 |
| CN105413238B true CN105413238B (en) | 2017-07-18 |
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| CN201410332802.2A Active CN104069650B (en) | 2014-07-14 | 2014-07-14 | A kind of water-and-oil separator and oil field oil water mixed solution separation method |
| CN201510993976.8A Active CN105413238B (en) | 2014-07-14 | 2014-07-14 | A kind of oil water separator |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104828990B (en) * | 2015-03-11 | 2016-09-28 | 崔斌 | A kind of pipe box tubular type four-phase separator and oil field oil water mixed liquor Isolation method |
| CN105000704B (en) * | 2015-08-05 | 2017-03-01 | 崔斌 | Pipe type oil moisture trap and separation method |
| CN108191001B (en) * | 2018-01-08 | 2019-06-14 | 中国科学院力学研究所 | A kind of oily-water seperating equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4311590A (en) * | 1980-09-25 | 1982-01-19 | Sheng Henry P | Phase separation apparatus |
| CN101810941A (en) * | 2010-04-13 | 2010-08-25 | 中海石油(中国)有限公司深圳分公司 | Compound oil-water separation system |
| CN202724757U (en) * | 2012-08-03 | 2013-02-13 | 烟台荣丰环保设备有限公司 | Oil-water separating assembly |
| CN103752042A (en) * | 2013-01-29 | 2014-04-30 | 中国石油天然气股份有限公司 | Oil-water-mud separation member for split wing plate and combined body of split wing plate as well as oil-water-mud separation method |
| CN204159074U (en) * | 2014-07-14 | 2015-02-18 | 崔斌 | A kind of oil water separator |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2067597U (en) * | 1989-11-30 | 1990-12-19 | 李青芳 | Floating separator for mixture of oil and water |
| CN2448429Y (en) * | 2000-05-03 | 2001-09-19 | 骆金山 | Oil and water separator |
| WO2011071113A1 (en) * | 2009-12-10 | 2011-06-16 | 株式会社Ihi | Oil-water separation device and refining device |
| CN101973648B (en) * | 2010-07-05 | 2013-02-20 | 无锡出新环保设备有限公司 | Gravity oil and water separator |
| CN103102024A (en) * | 2012-12-19 | 2013-05-15 | 贵州长绿科技有限公司 | Recycling method for oily wastewater |
| CN203469547U (en) * | 2013-09-27 | 2014-03-12 | 山西晋丰煤化工有限责任公司 | Oil-water separation device |
-
2014
- 2014-07-14 CN CN201410332802.2A patent/CN104069650B/en active Active
- 2014-07-14 CN CN201510993976.8A patent/CN105413238B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4311590A (en) * | 1980-09-25 | 1982-01-19 | Sheng Henry P | Phase separation apparatus |
| CN101810941A (en) * | 2010-04-13 | 2010-08-25 | 中海石油(中国)有限公司深圳分公司 | Compound oil-water separation system |
| CN202724757U (en) * | 2012-08-03 | 2013-02-13 | 烟台荣丰环保设备有限公司 | Oil-water separating assembly |
| CN103752042A (en) * | 2013-01-29 | 2014-04-30 | 中国石油天然气股份有限公司 | Oil-water-mud separation member for split wing plate and combined body of split wing plate as well as oil-water-mud separation method |
| CN204159074U (en) * | 2014-07-14 | 2015-02-18 | 崔斌 | A kind of oil water separator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104069650B (en) | 2016-06-08 |
| CN105413238A (en) | 2016-03-23 |
| CN104069650A (en) | 2014-10-01 |
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