CN104148196B - A kind of column gas-liquid cyclone separator entrance fairing - Google Patents
A kind of column gas-liquid cyclone separator entrance fairing Download PDFInfo
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- CN104148196B CN104148196B CN201410376748.1A CN201410376748A CN104148196B CN 104148196 B CN104148196 B CN 104148196B CN 201410376748 A CN201410376748 A CN 201410376748A CN 104148196 B CN104148196 B CN 104148196B
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Abstract
The invention discloses a kind of column gas-liquid cyclone separator entrance fairing, adopt expanding buffering to add the entrance rectifier tube design that spiral has a down dip, including being sequentially connected the expanding separator tube that connects, wide-angle bend pipe, spiral have a down dip pipe, negative throat noz(zle). The solution have the advantages that the speed of liquid plug all substantially reduces with length while slug flow is by the expanding breeze way seasonal epidemic pathogens liquid-phase mixing aggravation on vertical direction so that liquid plug intensity declines to a great extent, being prone to of change is dissipated; After entering the spiral section of having a down dip, force slug flow is converted into stratified flow, it is achieved the pre-separation of gas-liquid two-phase under the centrifugal force dual function with gravity; The negative throat noz(zle) eventually passing rectifier tube outlet makes the tangential column cyclone separator that enters of gas-liquid two-phase acceleration carry out cyclonic separation. Utilize the present invention can existing column cyclone separator be undergone technological transformation, increase substantially the separation efficiency of column cyclone separator, create bigger economic benefit for oil gas field; Applied to deep seafloor oil gas field, it is possible to the exploitation for deepwater field provides technical support.
Description
Technical field
The present invention relates to a kind of efficient column gas-liquid cyclone separator entrance fairing, belong to gas-liquid cyclone separator and multiphase flow technical field.
Background technology
Column gas-liquid cyclone separator (Gas-LiquidCylindricalCyclone, be called for short GLCC) is simple and compact for structure, energy consumption is low, light weight, easy to maintenance, be easy to build and install, be widely applied in recent years. general GLCC entrance structure is that gas-liquid mixed incoming flow tangentially enters gas-liquid column cyclone separator through the pipe that has a down dip after standpipe (having expanding on standpipe), GLCC entrance structure determines the entrance liquid phase distribution of separator and the size of liquid phase tangential inlet speed, is one of key factor affecting GLCC stalling characteristic. due to the difference of liquid phase flow velocity, heterogeneous fluid is likely to present the multiple flow patterns such as stratified flow, slug flow, ring dress liquid mist stream in inlet tube. Kouba [KoubaG.E., ShohamO., ShiraziS..DesignandPerformanceofGas-LiquidCycloneSeparat ors [C] .Proc., theBHRGroup7thInternationalMeetingonMultiphaseFlow, Cannes, France:June7-9, 1995.] experimentation shows, the downward-sloping formation being conducive to stratified flow of inlet tube, improve gas-liquid separation effect to a great extent, the scope of application of extension column gas-liquid cyclone separator, experiments show that the GLCC Effec-tive Function scope of vertical stratification entrance is about the half that entrance structure is incline structure.Be worth propose be, Mathiravedu [MathiraveduR.S..ControlSystemDevelopmentandPerformanceEv aluationofLLCCSeparators [D] .Tulsa, Oklahoma.TheUniversityofTulsa, 2001.] be experimentally confirmed, for column liquid liquid cyclone separator (LLCC), horizontal access correspondence separating property is better than inclination entrance. Gomez&Mohan [GomezL., MohanR., ShohamO.etal.AspectRatioModelingandDesignprocedureforGLC CCompactSeparators [J] .ASMETransactions, JournalofEnergyResourcesTechnology, 1999, 121 (1) .] think that downward-sloping entrance structure forms eddy flow field after the liquid phase through initial gross separation is just rotated a circle under the inlet, avoid the interference of gas phase ascending motion, the GLCC foaming phenomena of horizontal access is even more serious, the pendular ring showed increased of Droplet Settling Area simultaneously, the tilt angled down of inlet tube is advisable between 25 �� ~ 30 ��. Kouba [KoubaG.E.&O.Shoham.AnUpdateofGas-LiquidCylindricalCyclon e (GLCC) Technology [R] .IBCConference, Houston, Texas, 1997.] think that the best entrance degree of tilt that has a down dip is about 27 �� by observation, pipe range should take 1.0 ~ 1.5m, it should be noted that increase inlet length is conducive to stablizing of operating mode, but by the restriction of installing space. the inlet tube of GLCC is generally adopted the form of the straight tube that has a down dip, spiral has a down dip the application less [C.Deuel&Y.D.Chin.FieldValidationandLearningoftheParqueda sConchas (BC-10) SubseaProcessingSystemandFlowAssuranceDesign [J] .OffshoreTechnologyConference, 2011] of pipe. the pipe diameter determing criterion of GLCC inlet tube is generally basede on Taitel&Dukler [TaitelY.&A.E.Dukle.AModelforPredictingFlowRegimeTransiti oninHorizontalandNearHorizontalGas-LiquidFlow [J] .AIChEJ., 1975.] stratified flow and is converted to the criterion of slug flow or annular flow. general GLCC entrance rectifier tube is shorter by the have a down dip distance of pipe of the restriction of installing space, is difficult to the steady dissipation of liquid plug in the limited length that has a down dip, the gas-liquid interface simultaneously having a down dip in pipe and nozzle wall surface are mutually perpendicular to, and Membrane Separator Cylinder for CFB Boiler is caused constant impingement.
Summary of the invention
For the problems referred to above, it is an object of the invention to provide a kind of column gas-liquid cyclone separator entrance fairing, it can effectively realize gas-liquid slug to flow to the conversion of laminar flow in bigger liquid phase velocity interval, thus more efficiently improving the pre-separation effect of gas-liquid incoming flow, entrance incoming flow more smoothly, the scope of application of extension column cyclone separator is provided for column cyclone separator.
The present invention is in the limited installing space of column cyclone separator entrance, adopt the entrance rectifier tube design concept that expanding buffering+spiral has a down dip, oil gas water three phase slug incoming flow is made to be converted into laminar flow in limited flow distance, best entry condition, the scope of application of extension column cyclone separator is provided for separator column cyclone separator cyclonic separation section while carrying out gas-liquid two-phase pre-separation.
The ultimate principle of the present invention is that the speed of liquid plug all substantially reduces with length while slug flow is by the expanding separator tube seasonal epidemic pathogens liquid-phase mixing aggravation on vertical direction so that liquid plug intensity declines to a great extent, and being prone to of change is dissipated; Entrance spiral has a down dip after pipe, forces slug flow is converted into stratified flow, it is achieved the pre-separation of gas-liquid two-phase under the centrifugal force dual function with gravity; The negative throat noz(zle) eventually passing rectifier tube outlet makes the tangential column cyclone separator that enters of gas-liquid two-phase acceleration carry out cyclonic separation.
The technical scheme that the present invention is concrete is as follows:
The present invention is the bend pipe of a both ends open, including being sequentially connected the expanding separator tube that connects, wide-angle bend pipe, spiral have a down dip pipe, negative throat noz(zle), expanding separator tube adopts flaring design, for realizing the smooth transition of liquid plug, reduce the mixing of gas-liquid two-phase and the emulsification pretreatment of profit, expanding angle is not more than 15 ��, and ensure expanding after standpipe section volume can hold the liquid measure of a liquid plug;Wide-angle bend pipe is as the connecting elements of standpipe (expanding separator tube) and serpentine pipe (spiral have a down dip pipe), for ensureing the mild flowing of our department's liquid seperating plug, reduce the mixing of gas-liquid two-phase and the emulsification pretreatment of profit, adopting wide-angle bend pipe to carry out transition, wide-angle bend pipe includes 77 �� of vertical bridge pieces of angle of bend and 40 �� of level connection joint bend pipes of angle of bend, the convergent curved surface of negative throat noz(zle) adopts smooth arc surface design, and nozzle cambered surface radius takes the radius of spin, and nozzle length takes the spiral caliber of 2 ~ 5 times so that accelerator is more steady, the spiral pipe that has a down dip is the core of the design, adopt two sections of designs, for ensureing smoothly transitting of junction, two sections of serpentine pipe angles of inclination are identical, adopt the helix angle of 27 ��, the screw diameter of two segment pipes is different, so can realize the reasonable Arrangement simultaneously facilitating pipe arrangement effectively controlled of serpentine pipe different parts centrifugal force, the serpentine pipe in front adopts bigger screw diameter, so in the anglec of rotation of 1/4 circle, significantly increase spiral length, the serpentine pipe at rear adopts less screw diameter, so in the anglec of rotation of 1/2 circle the smooth stratified flow interface angle that achieves to the conversion of vertical direction, good stratified flow boundary condition is created for entering column cyclone structure, we are by Taitel&Dukler [TaitelY.&A.E.Dukle.AModelforPredictingFlowRegimeTransiti oninHorizontalandNearHorizontalGas-LiquidFlow [J] .AIChEJ., 1975.] slug carry out expanding separator tube after flowing to the improvement that the Transition Criteria that stratified flow changes considers centrifugal modelling after the caliber caliber of pipe (spiral have a down dip) and the design of screw diameter, liquid in pipe flow is bigger, when intraluminal fluid position is higher, the fluid wave wave amplitude that air-flow blows afloat is up to pipe top, when barrier gas circulation area, just it is changed into slug flow by stratified flow. on the contrary, when fluid flow is less, liquid level is relatively low, when intraluminal fluid amount is not enough to block pipeline, liquid is blowed to tube wall by air-flow, and has partially liq to be dispelled into liquid mist by air-flow to be mingled with in the gas flow, form ring-type liquid mist stream. when flow parameter is converted into dimensionless group, the reference variable of length is caliber d, and the reference variable of area is d2, the reference variable of liquid phase is ��slAnd ��sg, all with subscript " ~ " represent. Discriminant equation is:
(1)
The equation of momentum is:
(2)
In formula:
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
Having a down dip pipe in order to the design criteria of the straight tube that has a down dip is applied to spiral, the acceleration item a in formula is modified, if the curvature diameter of serpentine pipe is D, then the acceleration suffered by the effect liquid phase of centrifugal force is:
(15)
To gravity acceleration g and centripetal acceleration a1Obtaining apparent acceleration after synthesizing is:
(16)
Fluid velocity adopts liquid phase true velocity herein.
Liquid holdup is as follows with the relation of intraluminal fluid position height:
(17)
Various middle subscript i represents alternate, and S is wetted perimeter. Various parameter declaration is as follows above:
X2For Luo-Ma parameter; Y is dimensionless parameter, represents the impact of pipeline inclination angle, and both directly can be tried to achieve by physical properties of fluids and pipe parameter, the C under turbulent conditionl=Cg=0.184, n=m=0.2. Various middle dimensionless parameter is all dimensionless numberThe function of the ratio of caliber (the intraluminal fluid position height with).
When serpentine pipe is designed, design above criterion is utilized to be had a down dip by program calculation spiral the structural parameters of pipe, and consider the whole matching of entrance rectification module and column cyclone separator, in the suitable geometric parameter interval range of result of calculation gained, filter out spiral have a down dip pipe caliber, screw diameter.
Advantages of the present invention is do not adopt any internals inside rectifier tube, it is ensured that its permanent failure-free operation; Cushion space between expanding separator tube and spiral bending tube achieves effective buffering of slug flow; The form of spiral bending tube is adopted, the length adding the inlet tube section of having a down dip at double in limited installing space; The spontaneous centrifugal force field of serpentine pipe has been effectively promoted the dissipation of liquid plug and to make laminar flow interface be that certain angle of inclination enters column cyclone separator, improves separation efficiency; Negative throat noz(zle) achieves the steady acceleration of gas-liquid two-phase, it is to avoid the impact to column cyclone separator. The invention has the beneficial effects as follows, can utilize the present invention that existing column cyclone separator is undergone technological transformation, do not changing original mounting means, it is not take up being greatly improved under the premise of extra installing space the separation efficiency of column gas-liquid cyclone separator, creates bigger economic benefit for oil field; Utilizing the present invention to design brand-new more efficient column eddy flow class separator, its range of application extends to deep seafloor oil gas field as deep seafloor separator, the exploitation for deepwater field provides technical support.
Accompanying drawing explanation
Fig. 1 is side-looking structural representation of the present invention.
Fig. 2 is plan structure schematic diagram of the present invention.
Fig. 3 is the expanding separator tube structural representation of the present invention.
Fig. 4 is wide-angle bend pipe structure schematic diagram of the present invention.
Fig. 5 is that spiral of the present invention has a down dip tube side TV structure schematic diagram.
Fig. 6 is that spiral of the present invention has a down dip pipe plan structure schematic diagram.
Fig. 7 is that the present invention gradually draws together nozzle schematic diagram.
Fig. 8 is that the present invention coordinates figure with GLCC.
Wherein, in Fig. 1, Fig. 2: the expanding separator tube of 1-, 2-wide-angle bend pipe, 3-spiral has a down dip pipe, 4-negative throat noz(zle); In Fig. 3: 5-expanding head, 6-cushions standpipe; In Fig. 4: the vertical bridge piece of 7-, 8-level connection joint bend pipe; In Fig. 5, Fig. 6: the little curvature spiral section of having a down dip of 9-, the 10-deep camber spiral section of having a down dip; In Fig. 8: 11-gas-liquid column cyclone separator.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the topology layout of the present invention, operational process and innovation are described further.
Referring to accompanying drawing 1, accompanying drawing 2, present invention incorporates expanding buffer component and spiral has a down dip the advantage of pipe, it is broadly divided into expanding buffering reduction of speed part and spiral has a down dip pipe liquid plug dissipative part, have a down dip pipe 3, negative throat noz(zle) 4 including expanding separator tube 1, wide-angle bend pipe 2, spiral.
Referring to accompanying drawing 3, the expanding separator tube 1 of the present invention includes expanding head 5, buffering standpipe 6. For realizing the smooth transition of liquid plug, reduce the mixing of gas-liquid two-phase and the emulsification pretreatment of profit, the caliber that cushion space is 16 times of buffering standpipe 6, expanding angle 15 ��; Buffering standpipe volume to hold a liquid plug.
Referring to accompanying drawing 4, the wide-angle bend pipe 2 of the present invention includes vertical bridge piece 7, level connection joint bend pipe 8. Two sections of circular arcs are adopted to carry out transition, vertical bridge piece 7 angle of bend 77 ��, level connection joint bend pipe 8 angle of bend 40 ��, wide-angle bend pipe 2 is as the connecting elements of standpipe section Yu pigtail, can ensure that the mild flowing of our department's liquid seperating plug, reduce the mixing of gas-liquid two-phase and the emulsification pretreatment of profit.
Referring to accompanying drawing 5, accompanying drawing 6, the spiral of the present invention pipe 3 that has a down dip includes the little curvature spiral section of having a down dip 9, the deep camber spiral section of having a down dip 10. Have a down dip 27 �� of the inclination angle of pipe 3. Little curvature pigtail 9 rotates 1/4 circle, the physical length adding this section of less radius of curvature, and the deep camber spiral section of having a down dip 10 rotates 1/2 circle, the centrifugal force adding this section of bigger radius of curvature, it is achieved that vertically turning to of laminar flow interface.
Referring to accompanying drawing 7, the negative throat noz(zle) 4 convergent curved surface of the present invention adopts smooth arc surface design, and cambered surface radius takes the radius of spin, and nozzle length is the spiral caliber of 3 times.
As shown in Figure 8, the work process of the present invention is: oil gas water mixing section plug flow enters expanding separator tube 1 through standpipe section, and while liquid phase mixing aggravation, speed and the length of liquid plug all substantially reduce so that liquid plug intensity declines to a great extent, and being prone to of change is dissipated; Liquid plug after buffering enters spiral gently through wide-angle bend pipe 2 and has a down dip pipe 3, forces slug flow is converted into stratified flow, it is achieved the pre-separation of gas-liquid two-phase under the centrifugal force dual function with gravity; Gas-liquid column cyclone separator is accelerated into through negative throat noz(zle) 4 after.
Claims (5)
1. a column gas-liquid cyclone separator entrance fairing, it is characterized in that expanding separator tube (1) that it includes being sequentially connected, wide-angle bend pipe (2), spiral have a down dip pipe (3), negative throat noz(zle) (4), described expanding separator tube (1) adopts flaring design, expanding angle is not more than 15 ��, and ensure expanding after standpipe section volume can hold the liquid measure of a liquid plug; Described wide-angle bend pipe (2) has a down dip as expanding separator tube (1) and spiral the connecting elements of pipe (3), including vertical bridge piece (7), level connection joint bend pipe (8); The convergent curved surface of described negative throat noz(zle) (4) adopts smooth arc surface design, and nozzle cambered surface radius takes the radius of spin, and nozzle length takes the spiral caliber of 2-5 times; Described spiral have a down dip pipe (3) adopt two sections of designs, the respectively little curvature spiral section of having a down dip (9) and the deep camber spiral section of having a down dip (10).
2. fairing according to claim 1, is characterized in that described expanding separator tube (1) includes being sequentially connected the expanding head (5) connect and buffering standpipe (6).
3. fairing according to claim 1, is characterized in that described vertical bridge piece (7) angle of bend 77 ��, level connection joint bend pipe (8) angle of bend 40 ��.
4. fairing according to claim 1, is characterized in that the described little curvature spiral section of having a down dip (9) rotates 1/4 circle, and the deep camber spiral section of having a down dip (10) rotates 1/2 circle.
5. fairing according to claim 1, is characterized in that described spiral has a down dip 27 �� of pipe (3) inclination angle.
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| CN106289428B (en) * | 2015-05-12 | 2018-03-27 | 吉林大学 | Cool down device and metering system |
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| CN112081571A (en) * | 2020-07-21 | 2020-12-15 | 中国石油大学(北京) | Double-inlet pipe column type gas-liquid separator |
| CN112371360B (en) * | 2020-09-25 | 2022-07-19 | 东北石油大学 | Bent pipe coalescence type three-phase cyclone separator |
| CN112377710A (en) * | 2020-11-05 | 2021-02-19 | 长江大学 | Device for converting intermittent slug flow into continuous annular flow |
| FR3130832A1 (en) * | 2021-12-20 | 2023-06-23 | IFP Energies Nouvelles | Gas-liquid separation device with an accompanying zone for the liquid at the outlet, in particular for a three-phase fluidized bed reactor |
| CN116427896A (en) * | 2022-01-04 | 2023-07-14 | 中国石油天然气股份有限公司 | Flow controller for uniform use of horizontal well and application |
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Application publication date: 20141119 Assignee: FUJIAN SNOWMAN Co.,Ltd. Assignor: China University of Petroleum (East China) Contract record no.: X2020980005286 Denomination of invention: A rectifying device at the inlet of a columnar gas-liquid cyclone separator Granted publication date: 20160608 License type: Exclusive License Record date: 20200824 |