CN101028614A - Vertical dynamic cyclone device - Google Patents

Vertical dynamic cyclone device Download PDF

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Publication number
CN101028614A
CN101028614A CN 200610020989 CN200610020989A CN101028614A CN 101028614 A CN101028614 A CN 101028614A CN 200610020989 CN200610020989 CN 200610020989 CN 200610020989 A CN200610020989 A CN 200610020989A CN 101028614 A CN101028614 A CN 101028614A
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China
Prior art keywords
rotating cylinder
liquid
cyclone
adapter cavity
vertical
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CN 200610020989
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Chinese (zh)
Inventor
梁政
钟功祥
任连城
吴世辉
邓雄
杨志
吕志忠
蒋发光
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Southwest Petroleum University
Xian Shiyou University
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Southwest Petroleum University
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Priority to CN 200610020989 priority Critical patent/CN101028614A/en
Publication of CN101028614A publication Critical patent/CN101028614A/en
Pending legal-status Critical Current

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Abstract

A vertical dynamic cyclone separator for removing sand from thick oil and separating the oil-displacing polymer from the recovered liquid by gravitation and centrifugal is composed of a frequency-variable motor, a vertical cyclone separator with a rotary drum driven by said motor, and a settling tank for collecting the separated heavy phase.

Description

Vertical dynamic cyclone device
Technical field
The present invention relates to a kind of viscous crude desanding in Petroleum Production field and vertical dynamic cyclone device that the polymer flooding produced liquid separates of being used for.
Background technology
China at 15 big-and-middle-sized oil basins and the regional heavy crude reservoirs of having found One's name is legion such as pine the Liao Dynasty, Bohai Sea Gulf, accurate Ge Er, predicts that China's heavy crude reservoir oil in place is up to 80 * 10 at present 8m 3More than, therefore the thickened oil recovery of China has a high potential in oil field development from now on.But, because the effect of heavy crude reservoir compacting diagenesis is generally all relatively poor, the reservoir loose cementation, binding ability between sand grains is poor, under the higher barometric gradient effect, sand grains comes off easily in oil recovery process, and the viscosity of crude oil is generally higher, prop-carrying capacity is very strong, causes the phenomenon of shaking out in the oil extraction process very general and serious.Though existing various down-holes sand-preventing process, technological means have played sand controlling result to a certain extent at present, can not fundamentally solve the problem that viscous crude contains sand.And implementation of processes such as chemical sand control tends to have influence on the oil production of oil well.For this reason, the nineties in 20th century, oil extraction operation persons both domestic and external proposed the new thickened oil recovery method of " going out sand cooling adopts " in succession, and promptly sand control measure is not taked in the down-hole, allows sand with the crude oil extraction.Facts have proved out that the sand cooling excavating technology can significantly improve the voidage and the permeability of oil reservoir.But the crude oil sand content that goes out the sand cooling extraction is bigger, and oil field surface gathering and transferring equipment has been brought a bigger difficult problem.The a large amount of sand grains that is carrying in the crude oil is very easy under the deposition, cause equipment such as pipeline and storage tank to stop up in gathering line and all kinds of separation storage facilities, pump apparatus wearing and tearing aggravation, a series of adverse effects such as the effective rate of utilization reduction of storage class equipment.Therefore the sand grains of how removing expeditiously in the high viscosity viscous crude is a great problem that faces in the domestic and international thickened oil recovery.
The method that solves the viscous crude desanding at present both at home and abroad mainly is the gravitational settling desanding.Gravitational settling desanding principle is fairly simple, exactly crude oil is introduced large-scale precipitation apparatus, utilize the different specific weight of oil, water, sand to carry out the natural subsidence separation, this method settling efficiency is low, occupation area of equipment is big, dehydration of crude oil weak effect, and the sand setting work in the cleaning precipitation apparatus was both quite loaded down with trivial details, was absolutely unsafe.
What use at present for the eddy flow desanding device is static hydrocyclone, and gas-solid, the liquid-solid or liquid-liquid that is mainly used in the low viscosity medium separates.Practice shows, as long as hydrocyclone structure is reasonable in design, the centrifugal force that eddy flow produces is big more than 1000 times with force of gravity.So the separating effect of this separation method is significantly increased than the separating effect of settling methods, and the little advantage of occupation area of equipment simple in structure is arranged.
Because the design feature of static hydrocyclone self and special working method make static hydrocyclone be subjected to all restrictions aspect the further raising separative efficiency, particularly when handling the detached job of high viscosity medium (such as viscous crude), common static rotational flow separation equipment has run into some difficulties that are difficult to overcome.Because the viscosity of working media is big, frictional resistance increases in the medium, finally cause the increase of the pressure loss (energy loss), separating power reduces, can make cyclone completely lose separating power in the time of serious, the extraction liquid as the crude oil (viscous crude) of Henan Oil Field part oil well output during with polymer flooding can't separate with static hydrocyclone at all.These all are the difficulties that is difficult to overcome that present static eddy flow desanding device runs into when extraction liquid separates when handling full-bodied viscous crude desanding, dehydration and adopting polymer flooding.Along with a large amount of exploitations of the heavy crude reservoir of China and the large scale application of polymer flooding oil-extraction technology, make ground crude oil desanding, dehydration problem outstanding day by day, simple static cyclone technique has not satisfied the production needs at scene, oil field.
In recent years, developed a kind of horizontal dynamic cyclone device both at home and abroad,, caused dynamic cyclone technique in field produces, not promoted the use of so far because structurally there is defective in horizontal dynamic cyclone device.At present both at home and abroad the dynamic cyclone device of all size model mostly has a common design feature, and that is exactly horizontal layout, shaft orientation liquid feeding, and the rotating cylinder internal diameter with change simple length ratio big (draw ratio that has reaches more than 20).Tracing it to its cause, why adopt this feed liquor mode and do not adopt the mode of the tangential direction of traditional static cyclone, mainly is in order to simplify the feed liquor structure of dynamic cyclone device.But this structural simplification brings many unfavorable factors to the flow field of cyclone, has had a strong impact on separating effect, makes the advantage of horizontal moving cyclone fail to fully play out.Mainly show following some:
(1) axial admission is unfavorable for the separation of thing phase
No matter be that gas-solid, liquid-solid separation or liquid-liquid separate, the result of rotational flow separation makes gently to converge to the centre mutually and heavy phase is distributed in the periphery.So the total movement tendency of material is heavy phase migration to the periphery under action of centrifugal force, gently centre migration in opposite directions.When adopting the mode of tangential direction, liquid enters along the cyclone inwall, and most heavy phase " has preferentially occupied " periphery under action of centrifugal force, the light centre that then " is extruded into " mutually.So the main body of its radial motion is gently inwardly migration mutually.And the radial motion starting point of most of heavy phase is in the centre when adopting shaft orientation liquid feeding, and to be migrated to the periphery by the centre be the main body of radial motion to heavy phase under the effect of centrifugal force mechanical forces such as (or) other impellers.From the analysis of both radial velocities as can be seen, the shaft orientation liquid feeding mode is unfavorable for the separation of thing phase.For guarantee the heavy phase medium can be in the time that limits from central division the position move to the eddy flow wall, the diameter of cyclone can not be too big; Equally, under the certain situation of diameter, make heavy phase move to the eddy flow wall in the past leaving cyclone, rotating cylinder must need certain length.In order to guarantee enough disengaging times, the big draw ratio of the essential employing of the rotating cylinder of shaft orientation liquid feeding structure.
(2) the axial initial velocity of the liquid in the shaft orientation liquid feeding structure is too big, is unfavorable for increasing the effective time of staying of separating medium in disengagement chamber
Under identical liquid supply pressure, the axial velocity that liquid produced when axially the axial velocity that liquid produces during feed flow was than tangential feed flow is much bigger.So in the identical time, the former will produce bigger axial displacement.In order to guarantee that liquid has enough time of staying in cyclone, must increase the length of rotating cylinder.
(3) rotating cylinder of minor diameter makes the ability of dynamic cyclone device generation centrifugal force be restricted
For static cyclone, the partition size that cyclone can reach and the diameter of cyclone have direct dependence.This be because static cyclone in when work, the rotary motive power of liquid derives from the pressure energy of liquid self, under certain inlet hydraulic, minor diameter can produce bigger centrifugal force than major diameter.But for dynamic cyclone device, the rotary motive power of liquid is mainly derived from rotating cylinder, the rotation of rotating cylinder high speed rotating band hydrodynamic body, and the size of liquid generation centrifugal force depends primarily on the rotating speed and the diameter of rotating cylinder.Under the same diameter, the centrifugal force of the high more generation of rotating speed is big more; Under the same rotating speed, the centrifugal force of the big more generation of diameter is also big more.So adopt from this view point, the rotating cylinder of minor diameter to be unfavorable for the performance of dynamic cyclone device advantage.
(4) increase rotating cylinder length, increased the interference of system vibration stream field
(1) of front, (2) two have determined horizontal dynamic cyclone device rotating cylinder must adopt bigger draw ratio.But under same diameter, big more its axiality of rotating cylinder length be cannot say for sure to demonstrate,prove more, and under the situation that rotating cylinder rotates at a high speed, the geometric center of rotating cylinder and the departure degree of the centre of gyration affect final separating effect to a great extent in the separation process.Simultaneously, because the increase of length has increased the weight of the influence of system vibration stream field, light, the heavy phase of having separated are mixed again.
Comprehensive above the analysis as can be seen, adopt axial feed flow structure to bring many adverse effects for the separating effect of dynamic cyclone device, serious restriction the dynamic cyclone device technical development, this also can illustrate the research of passing through the more than ten years why, this technology still fails to be applied.
Summary of the invention
Purpose of the present invention aims to provide a kind of vertical dynamic cyclone device that is used for the band VFC that the heavy oil dehydration desanding separates with the polymer flooding produced liquid.This dynamic cyclone device can overcome static cyclone technique well and handle a series of difficult problems that run into when the difficult separating medium of high viscosity separates, the advantage that has kept conventional static cyclone to greatest extent, simultaneously than the dynamic cyclone device of the horizontal type structure of domestic and international proposition tangible advantage being arranged again, is the dynamic rotational flow separation equipment that a kind of suitable high viscosity medium and polymer detached job are used.
The technical solution adopted in the present invention is: variable-frequency motor (1), vertical chorista (3) and settling tank (4) etc. all adopt with shaft vertical (as shown in Figure 1) are installed, and connect firmly on frame (6) by base (18 among Fig. 2); Variable-frequency motor (1) connects flexible union joint (10 among Fig. 2) and coupking shaft (19 among Fig. 2) and drives and separate rotating cylinder (15 among Fig. 2) and rotate at a high speed with certain angular speed; Rotating cylinder (15) and to advance/return liquid spacer shell (12) be the parts of most critical wherein, their cooperate and not only form back liquid adapter cavity (HQ) and feed liquor adapter cavity (JQ), also form thread seal (L).On the cylindrical shell of rotating cylinder (15) position corresponding, have 3 tangential direction inlets (25) that are uniformly distributed along the circumference with feed liquor adapter cavity (JQ); Being separating liquid enters the passage of rotating cylinder (15) by feed liquor adapter cavity (JQ), and liquid enters the rotating cylinder (15) that is rotating along tangent line inlet (25), and the rotation of rotating cylinder is played liquid and quickened rotation, has strengthened the effect of centrifugation.In order to increase the service life of rotating cylinder, the present invention has installed lining I (22), lining II (23) and underflow opening (25) respectively in rotating cylinder inside, all belong to the high hardness wear-resisting material, wherein lining II (23) and underflow opening (24) are complete 4 groups 8, cone angle can be selected the underflow opening of suitable cone angle according to the concrete condition of extraction liquid between 0 °~30 °.Settling tank of the present invention (4) bottom is provided with control joint (5), and the aperture of the adjustable valve (5) bottom the adjusting settling tank can realize the adjustment of dynamic rotational flow separation split ratio.Rotating cylinder of the present invention top adopts radially alignment bearing (13), lower end employing axially to adopt thrust bearing (16) to support, and the dual-seal of helixseal (L) and moulding sealing (17) is all adopted at two ends.
The invention has the beneficial effects as follows: the whole vertical structure that adopts, extraction liquid enters cyclone from tangential direction with certain initial velocity, made full use of the comprehensive function of centrifugal force and gravity, heavy phase through initial gross separation in the separating medium is slowly sunk in the effect lower edge of gravity drum wall, enter settling tank through underflow opening, overcome horizontal dynamic cyclone device must increase rotating cylinder length for the effective disengaging time that increases separating medium shortcoming; Simultaneously, rotating cylinder of the present invention rotates with certain angular speed under the drive of motor, enter separating medium rotation at a high speed under the drive of rotating cylinder of rotating cylinder, having overcome the tangential velocity of static cyclone at the wall place is shortcoming zero, the rapid decay of tangential velocity when handling high viscosity medium; Being provided with of settling tank of the present invention can realize the air column of rotating cylinder inside is effectively eliminated in the water seal of cyclone underflow opening, reduces the turbulence intensity of interior flow field, reduces the loss of flow field internal energy greatly, improves separating effect; The present invention adopts variable-frequency motor to drive, and can adjust the aperture of the rotating speed and the control valve bottom the settling tank of motor (rotating cylinder) according to the performance of advancing separating medium with to the requirement of medium separating effect, thereby rationally adjust the treating capacity and the split ratio of cyclone; The inner taper angle of rotating cylinder of the present invention is 0 °~30 °, determines according to separating medium and technological parameter; The setting of liquid feeding end stable-pressure device of the present invention can well be eliminated the fluctuation of well head extraction hydraulic coupling.
Description of drawings
Fig. 1 is the overall structure schematic diagram of vertical dynamic cyclone device of the present invention.Among the figure: 1. variable-frequency motor, 2. fluid joint, 3. vertical rotational flow separation body, 4. settling tank, 5. control joint, 6. frame, 7. connecting line, 8. stable-pressure device, 9. liquid inlet joint.
Fig. 2 is the structure chart of the vertical rotational flow separation body of the present invention.Among the figure: 1. variable-frequency motor, 10. union joint, 11. union joint covers, 12. advance/return the liquid spacer shell, 13. alignment bearing, 14. bearing blocks, 15. rotating cylinders, 16. thrust bearings, 17. the moulding sealing, 18. bases, 19. connecting axles, 20. overflow pipes, 21. sealing, 22. lining I, 23. lining II, 24. underflow opening, 25. feed liquor screw plugs, L. thread seal, HQ. return the liquid adapter cavity, JQ. feed liquor adapter cavity, the cut inlet on the QK. rotating cylinder (3).
Fig. 3 is that vertical rotational flow separation body A-A is to profile.
The specific embodiment
Further specify the present invention below in conjunction with Fig. 1, Fig. 2 and Fig. 3.
Vertical dynamic cyclone device mainly is made up of variable-frequency motor (1), liquid back pipe road (2), vertical rotational flow separation body (3), settling tank (4), adjustable valve (5), frame (6), connecting line (7), stable-pressure device (8), feed liquor pipeline (9) etc. as depicted in figs. 1 and 2; Wherein vertical rotational flow separation body is again by union joint (10), and union joint cover (11) advances/return liquid spacer shell (12), alignment bearing (13), bearing block (14), rotating cylinder (15), thrust bearing (16), moulding sealing (17), base (18), connecting axle (19), overflow pipe (20), moulding sealing (21), lining I (22), lining II (23), underflow opening (24), feed liquor screw plug (25) major part is formed.
Variable-frequency motor (1) drives vertical rotating cylinder (15) with certain rotating speed rotation during dynamic cyclone device work; Pre-separation medium with certain pressure is after stable-pressure device (8) voltage stabilizing, tangentially enter by advancing/return the feed liquor adapter cavity (JQ) that liquid spacer shell (12) and rotating cylinder (15) form, the tangential direction mouth of liquid on rotating cylinder (15) that has certain pressure and tangential velocity in the feed liquor adapter cavity enters the rotating cylinder (15) of rotation with certain speed, realizes dynamic rotational flow separation under the drive of rotating cylinder (15); Under the comprehensive function of centrifugal force and gravity, heavy phase is enriched in the barrel of rotating cylinder (15) gradually, and sinks to settling tank (4) along barrel; Gently converge in the rotating cylinder center mutually, enter by advancing/return time liquid adapter cavity (HQ) that liquid spacer shell (12) and rotating cylinder (15) form, finally be discharged to the outside manifold of ining succession through overflow pipe (20); When working at the scene, regulate the aperture of the outlet control joint (5) of the rotating speed of variable-frequency motor and settling tank (4) below at any time in real time according to the ratio of the flow of extraction liquid and extraction liquid weight phase, realize the optimum Match control of each parameter.

Claims (4)

1. vertical dynamic cyclone device is characterized in that: variable-frequency motor (1), vertical rotational flow separation body (3) and settling tank (4) all take vertical coaxial to install, and connect firmly on frame (6) by base (18); Mainly connecting flexible union joint (10) and coupking shaft (19) by variable-frequency motor (1) drives and separates rotating cylinder (15) and rotate at a high speed with certain angular speed; Rotating cylinder (15) and to advance/return liquid spacer shell (12) be the parts of most critical, their cooperate and not only form back liquid adapter cavity (HQ) and feed liquor adapter cavity (JQ), also form thread seal (L); On the cylindrical shell of rotating cylinder (15) position corresponding, have 3 tangential direction inlets (25) that are uniformly distributed along the circumference with feed liquor adapter cavity (JQ); Being separating liquid enters the passage of rotating cylinder (15) by feed liquor adapter cavity (JQ), and liquid enters the rotating cylinder (15) that is rotating along tangent line inlet (25), and the rotation of rotating cylinder is played acceleration to liquid, has strengthened the effect of centrifugation.
2. vertical dynamic cyclone device according to claim 1, it is characterized in that: lining I (22) has been installed respectively in rotating cylinder (15) inside, lining II (23), underflow opening (24), all belong to the high hardness wear-resisting material, lining II (23) wherein, underflow opening (24) is complete 4 groups 8, cone angle is between 0 °~30 °, and the aperture of the control joint (5) bottom adjusting settling tank (4) can realize the adjustment of dynamic cyclone device split ratio.
3. vertical dynamic cyclone device according to claim 1, it is characterized in that: adopt radially alignment bearing (13), bottom employing axially to adopt thrust bearing (16) to support on rotating cylinder (15) top, the dual-seal of thread seal (L) and moulding sealing (17) is all adopted at two ends.
4. vertical dynamic cyclone device according to claim 1, it is characterized in that: the pre-separation working media with certain pressure is through stable-pressure device (8) voltage stabilizing, tangentially enter by advancing/return the feed liquor adapter cavity (JQ) that liquid spacer shell (12) and rotating cylinder (15) form, under the drive of rotating cylinder (15), realize dynamic rotational flow separation; Under the comprehensive function of centrifugal force and gravity, heavy phase is enriched in the barrel of rotating cylinder (15) gradually, and sink to settling tank (4) through underflow opening (24) along barrel, gently converge in the center of rotating cylinder (15) mutually, enter by advancing/return time liquid adapter cavity (HQ) discharge that liquid spacer shell (12) and rotating cylinder (15) form through overflow pipe (20), finally be discharged to the outside manifold of connection.
CN 200610020989 2006-05-09 2006-05-09 Vertical dynamic cyclone device Pending CN101028614A (en)

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102921569A (en) * 2012-12-03 2013-02-13 云南磷化集团有限公司 Two-phase flow cyclone
CN103007584A (en) * 2012-12-20 2013-04-03 浙江大学 Hollow floating oil-water separator with spiral grid
CN104492616A (en) * 2014-11-27 2015-04-08 天津亿利科能源科技发展股份有限公司 Multistage parallel hydrocyclone capable of regulating flow velocity
CN106669994A (en) * 2017-03-24 2017-05-17 绵阳耀邦环保科技有限公司 High-sulfur coal mine swirler provided with damping device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102921569A (en) * 2012-12-03 2013-02-13 云南磷化集团有限公司 Two-phase flow cyclone
CN102921569B (en) * 2012-12-03 2015-03-18 云南磷化集团有限公司 Two-phase flow cyclone
CN103007584A (en) * 2012-12-20 2013-04-03 浙江大学 Hollow floating oil-water separator with spiral grid
CN103007584B (en) * 2012-12-20 2014-10-15 浙江大学 Hollow floating oil-water separator with spiral grid
CN104492616A (en) * 2014-11-27 2015-04-08 天津亿利科能源科技发展股份有限公司 Multistage parallel hydrocyclone capable of regulating flow velocity
CN106669994A (en) * 2017-03-24 2017-05-17 绵阳耀邦环保科技有限公司 High-sulfur coal mine swirler provided with damping device
CN106669994B (en) * 2017-03-24 2019-01-29 威海尚品机械设备科技有限公司 It is provided with the high sulfur coal mine cyclone of damping device

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