CN106693447A - Equidirectional cyclone separator of two kinds of media with different densities - Google Patents

Equidirectional cyclone separator of two kinds of media with different densities Download PDF

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Publication number
CN106693447A
CN106693447A CN201510795364.8A CN201510795364A CN106693447A CN 106693447 A CN106693447 A CN 106693447A CN 201510795364 A CN201510795364 A CN 201510795364A CN 106693447 A CN106693447 A CN 106693447A
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CN
China
Prior art keywords
pipe
cyclone
cyclone pipe
same
inlet tube
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Pending
Application number
CN201510795364.8A
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Chinese (zh)
Inventor
吴应湘
史仕荧
许晶禹
李华
钟兴福
李东晖
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Institute of Mechanics of CAS
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Institute of Mechanics of CAS
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Application filed by Institute of Mechanics of CAS filed Critical Institute of Mechanics of CAS
Priority to CN201510795364.8A priority Critical patent/CN106693447A/en
Publication of CN106693447A publication Critical patent/CN106693447A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D17/00Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02Separation of non-miscible liquids
    • B01D17/0217Separation of non-miscible liquids by centrifugal force
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D45/00Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/12Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
    • B01D45/16Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/40Devices for separating or removing fatty or oily substances or similar floating material
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G33/00Dewatering or demulsification of hydrocarbon oils
    • C10G33/06Dewatering or demulsification of hydrocarbon oils with mechanical means, e.g. by filtration
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2221/00Applications of separation devices
    • B01D2221/04Separation devices for treating liquids from earth drilling, mining

Abstract

The invention provides an equidirectional cyclone separator of two kinds of media with different densities. The equidirectional cyclone separator comprises an inlet pipe, a cyclone pipe, an overflow pipe, a heavy phase outlet pipe and a cyclone converter in sequential connection, wherein one end of the cyclone pipe communicates with the inlet pipe; the cyclone pipe is used for performing rotation separation on a mixed solution entering the cyclone pipe; the overflow pipe is arranged on the axis line of the other end of the cyclone pipe, and is used for discharging separated light phase liquid; one end of the heavy phase outlet pipe is arranged at the other end of the cyclone pipe in a way of being tangent with the cyclone pipe, and is used for discharging the separated heavy phase liquid; the cyclone converter is arranged at one end, near the inlet pipe, in the cyclone pipe, and comprises a rod body and a guide blade arranged on the outer periphery of the rod body; the guide blade changes the axial flowing of the flowing mixed liquid into the circumferential rotation flowing. A dewatering structure of the streamline flow guide blades is used, so that the two phases of media do forward rotation movement in the same axial direction in the pipeline; therefore the problem of mixing due to double reverse flow movement can be reduced.

Description

Two kinds of cyclone separators in the same direction of different densities medium
Technical field
It is more particularly to a kind of to be directed to two kinds of blending agents of different densities the present invention relates to liquid separation field Separate cyclone separator in the same direction.
Background technology
Cyclone separator is a kind of conventional separator, when the two-phase with density variation enters cyclonic separation After device, eddy flow field is formed by the guide functions of entrance, in eddy flow field, because density is different, two-phase is subject to Centrifugal force it is different, migratory direction is different in radial directions, the opposite pipeline center region of the small lightweight of density Motion, the opposite pipeline wall motion of the big heavy of density, both are flowed out so as to realize two from different mouths respectively Phase cyclonic separation.This separator for traditional gravity settling separation equipment have simple structure, There is no the advantages of moving component, floor space are small, production capacity is big, be widely used in industry-by-industry such as stone Oily industry, municipal wastewater treatment etc..
Existing cyclone separator, common ground is that the two-phase with density variation is realized radially in eddy flow field In opposite direction being axially moved after separation, the reverse two-phase flow of this axial movement can be mutual in interface Mutually disturb, separating property is unstable, and separating effect is poor.
The content of the invention
It is an object of the invention to provide a kind of separator that can improve two-phase mixtures liquid separating effect.
Especially, the cyclone separator in the same direction of two kinds of different densities media of the invention, including be sequentially connected:
Inlet tube, for receiving mixed liquor to be separated;
Cyclone pipe, is connected by one end with the inlet tube, for being rotated to the mixed liquor for entering Separate;
Overflow pipe, on the axial line of the cyclone pipe other end, for discharging the lightweight phase after separating Liquid;
Heavy phase outlet, its one end is arranged on the another of the cyclone pipe in the mode tangent with the cyclone pipe One end, for discharging the heavy phase liquid after separating;
Eddy flow converter, near described inlet tube one end in the cyclone pipe, including barred body, and peace Mounted in the guide vane of the barred body excircle, the mixing liquid that the guide vane will be flowed through is by axially flowing Be changed into circumference to rotational flow.
Further, the barred body of the eddy flow converter is solid construction, including middle part cylinder, and set Put at the symmetrical semiellipse end in the cylinder two ends, the semiellipse end is probability curvilinear function rotation one Zhou Suocheng, the height of the probability curve is 2.5 times of the cylinder radius.
Further, the guide vane is circumferentially uniformly distributed around the cylinder of the barred body, including First straight line section relative with the mixed liquor direct of travel and with the axis parallel of the cyclone pipe, with institute Arc section of the first straight line section away from the tangent connection in mixed liquor direct of travel one end is stated, with the segmental arc The second straight line section of the tangent connection of the other end.
Further, the quantity of the guide vane is at least three, and the radius of the arc section is the circle The half of cylinder girth, the second straight line section and the angle α of the cross section of the cyclone pipe are 0~30 °.
Further, the length of the barred body and the length ratio of the cyclone pipe are 1:7.
Further, the inlet tube is connected with the cyclone pipe by flaring pipeline, the flaring pipeline root Cyclone pipe caliber difference when producing eddy flow with it according to the diameter of the inlet tube, is divergent structure or gradually Shrinking structure.
Further, the cyclone pipe installs the cross-sectional passage area and the entrance at the eddy flow converter The cross-sectional passage area ratio of pipe is 1:3~4.
Further, the caliber of the overflow pipe and the heavy phase outlet, is flowed into by the inlet tube The mixed liquor weight matter ratio-dependent.
Further, the overflow pipe is inserted in the cyclone pipe with the connection end of the cyclone pipe, and is located at The tie point of of length no more than described heavy phase outlet in the cyclone pipe and the cyclone pipe.
Further, flowmeter and control valve are separately installed with the inlet tube and the overflow pipe.
The present invention makes two-phase medium in the duct along identical axle using the water removing structure of streamlined flow deflector To Forward rotational movement, so as to double blending problems that reversely swirling motion brings can be reduced.Structure of the present invention is tight Gather, it is easy to safeguard, be particularly applicable in the harsher place such as pit shaft of environment, it is also possible to apply not Come in deep water subsea field mining system, and can be supporting with other process equipments, it is manufactured into small volume function strong Complete separation equipment, have good application prospect.
Present invention process is simple, and movement-less part is easy to maintenance, and operating cost is low, compact conformation, separates Function admirable.The problem that hydrocyclone space structure can be overcome not compact, is particularly applicable to downhole oil Water is separated, the following deep water field such as gas-liquid separation, liquid-liquid separation under water, is with a wide range of applications.
Brief description of the drawings
Fig. 1 is the structural representation of cyclone separator in the same direction according to an embodiment of the invention;
Fig. 2 is eddy flow converter structure schematic diagram in Fig. 1;
Fig. 3 is the structural representation of guide vane in Fig. 1;
In figure:10- inlet tubes, 11- inlet tubes quantifier, 20- cyclone pipes, 30- overflow pipes, 31- overflow pipes Quantifier, 32- valves, 40- heavy phases outlet, 50- eddy flows converter, 51- barred bodies, 511- cylinders, 512- semiellipses end, 52- guide vanes, 521- first straight lines section, 522- arc sections, 523- second straight lines section, 60- flarings pipeline, 100- cyclone separators in the same direction.
Specific embodiment
As shown in figure 1, the cyclone separator in the same direction 100 of the embodiment of the present invention includes being sequentially connected in general manner Inlet tube 10, cyclone pipe 20, overflow pipe 30 and heavy phase outlet 40, and installed in cyclone pipe Eddy flow converter 50 in 20.
The inlet tube 10 is connected by one end with the outlet of mixed liquor to be separated.Here mixed liquor can be with It is the mixture of gas-solid, liquid-solid, liquid-liquid or gas-liquid.
The cyclone pipe 20 is connected by one end with the other end of inlet tube 10, and it is entrance that cyclone pipe 20 is used for Mixed liquor carry out rotating separation provide space.
The eddy flow converter 50 is arranged near one end of inlet tube 10 in cyclone pipe 20, and it includes barred body 51, and the mixing liquid that will be flowed through installed in the guide vane 52 of the excircle of barred body 51, the guide vane 52 From axially flowing be changed into circumference to rotational flow.
The overflow pipe 30 is arranged on the axial line of the other end of cyclone pipe 20, for discharging the lightweight after separating Phase liquid.
Pacified installed in cyclone pipe 20 in the mode tangent with cyclone pipe 20 one end of the heavy phase outlet 40 One end of overflow pipe 30 is filled, for discharging the heavy phase liquid after separating.
During work, whole cyclone separator 100 in the same direction is vertically installed on the outlet of mixed liquor, is mixed Liquid by inlet tube 10 enter cyclone pipe 20, into cyclone pipe 20 mixed liquor at eddy flow converter 50 quilt Change flow direction, the circumference rotational flow around axial line is changed into from the flowing of axial direction, mixed liquor is in rotational flow mistake Cheng Zhong, heavy phase liquid is gradually thrown at the circumferential side wall of cyclone pipe 20 under the influence of centrifugal force, and Lightweight phase liquid then gathers at the axial line of cyclone pipe 20.In the other end of cyclone pipe 20, lightweight phase liquid Flowed out by the overflow pipe 30 on the axial line of cyclone pipe 20, and heavy phase liquid then by with cyclone pipe 20 Wall tangent heavy phase outlet 40 in side flows out.
In the present embodiment, lightweight phase liquid and heavy phase liquid after separation are flowed out by same one end, and two-phase is in rotation Along identical rotary motion axially forward in flow tube road, so as to reduce double blending that reversely swirling motion brings Problem.Specific application places can be downhole oil-water separation, following deep water gas-liquid separation, liquid-liquid under water Separate etc..Eddy flow converter 50 can naturally be fallen in the lower end of cyclone pipe 20 using gravity, it is also possible to be utilized Corresponding fixing device is fixed in the specified location of cyclone pipe 20.
In the present embodiment, the caliber of overflow pipe 30 and heavy phase outlet 40, can be by inlet tube 10 Locate the weight matter ratio-dependent of the mixed liquor of inflow.The radial section face of basic guarantee heavy phase outlet 40 Product and the radial section area ratio of cyclone pipe 20 equal at inlet tube 10 heavy phase containing rate.
To avoid liquid from flowing out, one end that cyclone pipe 20 installs overflow pipe 30 is blind end, and overflow pipe 30 Insertion ground is arranged in the end, and the length in the insertion cyclone pipe 20 of overflow pipe 30 is usually no more than heavy and mutually goes out The tie point of mouth pipe 40 and cyclone pipe 20, and positioned at heavy phase outlet 40 and the intersecting lens of cyclone pipe 20 Near bottom.
Heavy phase outlet 40 should flow to one with the tangent position of cyclone pipe 20 with the eddy flow in cyclone pipe 20 Cause, to ensure that heavy phase liquid smoothly flows out.Heavy phase outlet 40 can be one and possess 90 degree of knuckles Bend pipe, the outflow of its port of export and overflow pipe 30 is in opposite direction, makes heavy phase outlet 40 and inlet tube 10th, overflow pipe 30 is in the same plane.
Be according to flow into mixed liquor in weight phase ratio come regulate and control separate after liquid output, can be in entrance Flowmeter and control valve are respectively mounted on pipe 10 and overflow pipe 30.Using entrance flowmeter for pipe 11 and overflow The size of the lightweight phase content of mixed liquor is compared at the ratio of flowmeter for pipe 31, with inlet tube 10, so The aperture of valve 32 at overflow pipe 30 is adjusted afterwards, is worth both close, such that it is able to improve cyclone in the same direction 100 service behaviour.
Further, in one embodiment of the invention, the barred body 51 of the eddy flow converter 50 can be Solid construction, it includes the cylinder 511 at middle part, and is arranged on the symmetrical semiellipse in the two ends of cylinder 511 End 512.The streamlined structure that whole barred body 51 is formed in one, the top at the semiellipse end 512 of both end of which Portion is pointed in seamlessly transitting.The structure can reduce the resistance to mixed liquor, and improve the durability of itself.
Further, in the present embodiment, guide vane 52 can exist around the cylinder 511 of barred body 51 It is uniformly distributed on its circumference.Each guide vane 52 can respectively include it is relative with mixed liquor direct of travel and with The first straight line section 521 of the axis parallel of cyclone pipe 20, and with first straight line section 521 away from mixed liquor row Enter the arc section 522 of direction one end connection, and the second straight line with the tangent connection of the other end of arc section 522 Section 523.Mixed liquor can be more convenient using the guide vane 52 of arc and form eddy flow.Specific guide vane 52 quantity can determine according to the caliber of inlet tube 10, for the purpose of being rotated by the mixed liquor that can drive inflow, But the quantity of guide vane 52 is at least three.The radian of arc section 522 is corresponding with the caliber of cyclone pipe 20, So as to after mixed liquor enters the passage that guide vane 522 is formed, the stream that comes in cyclone pipe 20 be seamlessly transitted It is the rotational flow with circumferential speed.
The guide vane 52 along the surface of cylinder 511 evolute as shown in Figure 2,3, guide vane 52 It is made up of the first straight line section 521, arc section 522 and second straight line section 523 of a length of a, arc section 522 Two ends it is 523 tangent with first straight line section 521 and second straight line section respectively, the radius of arc section 522 is circle The half of the girth of cylinder 511, second straight line section 523 is α (0-30 °) with the cross section angle of cyclone pipe 20, Whole guide vane 52 winds 180 ° along cylinder 511.The semiellipse end 512 at the two ends of barred body 51 is prominent The pointed cone for going out, pointed cone surface for a probability curvilinear function rotate a circle institute into.The height of the probability curve is circle 2.5 times of the radius of cylinder 511, its effect is so that carrying out stream smoothly transits.
To make mixed liquor have the disengaging time of abundance, the length of barred body 51 and cyclone pipe of the eddy flow converter 50 20 length ratio can be 1:7.Mixed liquor can be made to change by eddy flow converter 50 by the ratio After flow direction, there are enough centrifugal actions, to separate heavy phase liquid and lightweight phase liquid.
To make mixed liquor be more easy to enter eddy flow state, in one embodiment of the invention, the inlet tube 10 Can be connected by flaring pipeline 60 with cyclone pipe 20, the flaring pipeline 60 can be according to inlet tube 10 The caliber difference of cyclone pipe 20 when diameter produces eddy flow with it, using divergent structure or tapered configuration.Typically The caliber of inlet tube 10 is the 1/2 of the caliber of cyclone pipe 20, and flaring pipeline 60 can make mixed liquor without hindrance Into cyclone pipe 20.
Further, eddy flow state is entered for convenience of mixed liquor, the cyclone pipe 20 installs eddy flow converter 50 The cross-sectional passage area at place is 1 with the cross-sectional passage area ratio of inlet tube 10:3~4.Revolved when mixed liquor enters When at stream transformer 50, mixed liquor enters a less space by a space wider, and its pressure increases Greatly, flow velocity increases, so as to produce an acceleration, improves mixed liquor by the rotation after guide vane 52 Rotary speed, so as to produce bigger centrifugal force, more easily separated lightweight phase liquid and heavy phase liquid.
The structure and the course of work of cyclone separator in the same direction 100 are illustrated with a specific example below.
The daily output for the production middle and later periods reaches the oil well of 2432m3/d, and it is 5%, well that it produces liquid oil content The radial dimension of cylinder is less than 250mm, and the radial dimension of cyclone separator in the same direction 100 is less than 200mm altogether. Under the above parameters, the caliber of the inlet tube 10 of cyclone separator in the same direction 100 is 80mm, and length is 200mm;The a length of 200mm of flaring pipeline 60, two ends caliber is respectively 80mm, 100mm;Cyclone pipe 20 caliber is 100mm, length 1000mm;Eddy flow converter 50 is arranged on from the entrance of cyclone pipe 20 At 200mm, the number of guide vane 52 is 3, and first straight line 521 length of section of guide vane 52 are 10mm, the radius of arc section 522 is 117mm, the second straight line section 523 tangent with arc section 522 with The cross section angle α of cyclone pipe 20 is 30 °, and the length of whole guide vane 52 is 100mm, barred body 51 A diameter of 50mm, a length of 90mm in two ends semiellipse end 512 of the upper and attachment portion of guide vane 52;Rotation The upper end of flow tube 20 flangeseal, the caliber of overflow pipe 30 is 35mm, heavy phase outlet 40 A diameter of 45mm, heavy phase outlet 40 5mm, overflow away from the upper flanges disk sealing of cyclone pipe 20 The insertion depth of pipe 30 is 55mm.
In the present embodiment, the day output of cyclone separator in the same direction 100 is 2000-2500m3/d, can be made 50% water flows out from heavy phase outlet 40, and oil content is less than 600ppm in water, remaining production liquid Being pumped to platform carries out advanced treating.
So far, although those skilled in the art will appreciate that herein it is detailed have shown and described it is of the invention Multiple exemplary embodiments, but, without departing from the spirit and scope of the present invention, still can be according to this Disclosure of invention directly determines or derives many other variations or modifications for meeting the principle of the invention.Cause This, the scope of the invention should be understood and defined as covering all these other variations or modifications.

Claims (10)

1. two kinds of cyclone separators in the same direction of different densities medium, including be sequentially connected:
Inlet tube, for receiving mixed liquor to be separated;
Cyclone pipe, is connected by one end with the inlet tube, for being rotated to the mixed liquor for entering Separate;
Overflow pipe, on the axial line of the cyclone pipe other end, for discharging the lightweight phase after separating Liquid;
Heavy phase outlet, its one end is arranged on the another of the cyclone pipe in the mode tangent with the cyclone pipe One end, for discharging the heavy phase liquid after separating;
Eddy flow converter, near described inlet tube one end in the cyclone pipe, including barred body, and peace Mounted in the guide vane of the barred body excircle, the mixing liquid that the guide vane will be flowed through is by axially flowing Be changed into circumference to rotational flow.
2. cyclone separator in the same direction according to claim 1, wherein,
The barred body of the eddy flow converter is solid construction, including middle part cylinder, and be arranged on the circle The symmetrical semiellipse end in cylinder two ends, the semiellipse end rotates a circle institute into institute for a probability curvilinear function The height for stating probability curve is 2.5 times of the cylinder radius.
3. cyclone separator in the same direction according to claim 2, wherein,
The guide vane is circumferentially uniformly distributed around the cylinder of the barred body, including mixes with described Liquid direct of travel is relative and first straight line section with the axis parallel of the cyclone pipe, with the first straight line Section away from the tangent connection in mixed liquor direct of travel one end arc section, it is tangent with the segmental arc other end The second straight line section of connection.
4. cyclone separator in the same direction according to claim 2, wherein,
The quantity of the guide vane is at least three, and the radius of the arc section is the cylinder girth Half, the second straight line section and the angle α of the cross section of the cyclone pipe are 0~30 °.
5. cyclone separator in the same direction according to claim 2, wherein,
The length of the barred body is 1 with the length ratio of the cyclone pipe:7.
6. cyclone separator in the same direction according to claim 1, wherein,
The inlet tube is connected with the cyclone pipe by flaring pipeline, and the flaring pipeline is according to the entrance The cyclone pipe caliber difference when diameter of pipe produces eddy flow with it, is divergent structure or tapered configuration.
7. cyclone separator in the same direction according to claim 1, wherein,
The cyclone pipe installs the section of the cross-sectional passage area and the inlet tube at the eddy flow converter Aisle spare ratio is 1:3~4.
8. cyclone separator in the same direction according to claim 1, wherein,
The caliber of the overflow pipe and the heavy phase outlet, the mixing flowed into by the inlet tube The weight matter ratio-dependent of liquid.
9. cyclone separator in the same direction according to claim 1, wherein,
The overflow pipe is inserted in the cyclone pipe with the connection end of the cyclone pipe, and positioned at the cyclone pipe The tie point of interior of length no more than described heavy phase outlet and the cyclone pipe.
10. cyclone separator in the same direction according to claim 1, wherein,
Flowmeter and control valve are separately installed with the inlet tube and the overflow pipe.
CN201510795364.8A 2015-11-18 2015-11-18 Equidirectional cyclone separator of two kinds of media with different densities Pending CN106693447A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108862466A (en) * 2018-06-11 2018-11-23 北京石油化工学院 A kind of device and method carrying out oily wastewater pre-separation based on axial eddy technology
CN111206913A (en) * 2020-03-13 2020-05-29 中国科学院力学研究所 Underground double-vortex type rotational flow oil-water separator

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Publication number Priority date Publication date Assignee Title
JP2007237061A (en) * 2006-03-07 2007-09-20 Ikutoku Gakuen Pump device and cyclone type foreign matter removing device
CN102225381A (en) * 2011-04-11 2011-10-26 东北石油大学 Co-rotating outflow internal-hole type high performance swirling separator
CN102251765A (en) * 2011-07-25 2011-11-23 中国科学院力学研究所 Axial type inlet oil-water cyclone separator
CN102716819A (en) * 2012-06-14 2012-10-10 东北石油大学 Variable-section multiple-blade deflector type inner cone separator
CN102728487A (en) * 2012-06-14 2012-10-17 东北石油大学 Axial-flow type isodirectional outflow cyclone separator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007237061A (en) * 2006-03-07 2007-09-20 Ikutoku Gakuen Pump device and cyclone type foreign matter removing device
CN102225381A (en) * 2011-04-11 2011-10-26 东北石油大学 Co-rotating outflow internal-hole type high performance swirling separator
CN102251765A (en) * 2011-07-25 2011-11-23 中国科学院力学研究所 Axial type inlet oil-water cyclone separator
CN102716819A (en) * 2012-06-14 2012-10-10 东北石油大学 Variable-section multiple-blade deflector type inner cone separator
CN102728487A (en) * 2012-06-14 2012-10-17 东北石油大学 Axial-flow type isodirectional outflow cyclone separator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108862466A (en) * 2018-06-11 2018-11-23 北京石油化工学院 A kind of device and method carrying out oily wastewater pre-separation based on axial eddy technology
CN108862466B (en) * 2018-06-11 2021-03-16 北京石油化工学院 Equipment and method for pre-separating oily sewage based on axial vortex technology
CN111206913A (en) * 2020-03-13 2020-05-29 中国科学院力学研究所 Underground double-vortex type rotational flow oil-water separator

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