CN112933663A - Oil-water-gas three-phase separator - Google Patents
Oil-water-gas three-phase separator Download PDFInfo
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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
- B01D17/0217—Separation of non-miscible liquids by centrifugal force
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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
- B01D17/0205—Separation of non-miscible liquids by gas bubbles or moving solids
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0042—Degasification of liquids modifying the liquid flow
- B01D19/0052—Degasification of liquids modifying the liquid flow in rotating vessels, vessels containing movable parts or in which centrifugal movement is caused
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Abstract
The invention provides an oil-water-gas three-phase separator, relates to the technical field of three-phase separators, and solves the technical problem that an existing vertical three-phase separator is low in separation efficiency. The device includes vertical knockout drum, be provided with entry shunt and current stabilizer in the vertical knockout drum, entry shunt cover is located current stabilizer's outside, just the entry shunt with vertical knockout drum's tangential import is linked together, the preseparation of gas-liquid can be realized to the entry shunt. Multiphase fluid entering the vertical separation tank from the tangential inlet enters the inlet flow divider for gas-liquid pre-separation, so that good preparation conditions are created for subsequent three-phase separation, rapid and effective gas-liquid separation is realized, and the separation efficiency is greatly improved; and the flow stabilizer also provides a stable laminar flow separation environment for oil-water two-phase separation.
Description
Technical Field
The invention relates to the technical field of three-phase separators, in particular to an oil-water-gas three-phase separator.
Background
The oil-water-gas three-phase separator is the core equipment for performing primary processing processes such as gas-liquid separation, oil-water sedimentation, crude oil dehydration and the like on oil well produced liquid in an oil-gas gathering and transportation treatment process. Oil well production fluids are typical multi-component systems, where water content often exceeds 70%. Especially in oil fields in the middle and later stages of development, the water content of produced liquid is even over 90 percent. A significant portion of the contained water appears as free water. The oil-gas two-phase separation is to make the mixture reach balance under a certain operation temperature and pressure, separate out the gas in the oil and condense the oil in the gas as much as possible, and then separate out the gas and the oil. The oil, gas and water are separated, oil and gas are separated, free water in the oil and gas is separated, and the processing performance of the three-phase separator directly influences whether the subsequent oil, water and gas processing technology can normally operate.
According to the shape and structure division, the existing oil-water-gas three-phase separator is mainly divided into a horizontal type and a vertical type. After decades of development and innovation, the research on horizontal three-phase separators at home and abroad is relatively mature, the design and manufacture of the horizontal separator realize standardization and serialization, and the horizontal separator is primary pre-separation equipment for oil well produced liquid, which is most widely applied on site, for example, a clean phase type three-phase separator released by Schlumberger company in 2008. However, the existing horizontal three-phase separator generally has the defects of large occupied area, high energy consumption, poor universality and the like, is difficult to meet the development requirements of cost reduction, efficiency improvement, energy conservation and emission reduction of an oil field, and also limits the application of the horizontal three-phase separator to areas such as an offshore platform and the like with high requirements on equipment compactness.
The vertical three-phase separator originates from a horizontal separator, has the advantages of small occupied area, simple structure, low operation and maintenance cost and the like, and is provided with a sewage draining exit at the bottom of the container, so that impurities deposited at the bottom of the container can be easily removed. However, the separation efficiency is low because the settling direction of oil drops carried by gas is opposite to the moving direction of airflow, the floating direction of bubbles carried by liquid is opposite to the flowing direction of the liquid and the like in the vertical separation tank.
Particularly, in the offshore oil and gas development process, an efficient and compact-size oil and gas gathering and transportation process and supporting equipment need to be adopted. In addition, most onshore oil fields enter the middle and later periods of exploitation, the water content of the produced liquid of the oil well is often over 90 percent, and the overhigh water content brings larger pressure to a ground oil-gas gathering and transportation processing system, particularly a three-phase separator, so that the water content of crude oil at an oil outlet of the three-phase separator is high, and the separated crude oil needs to be subjected to secondary treatment; the oil content of the sewage at the water outlet is high, and the sewage needs to be settled and deoiled again before entering the treatment station, so that the process flow of crude oil treatment is prolonged, the use of equipment is increased, the construction investment is high, the production cost of crude oil is increased, and the economic benefit of an oil field is reduced.
Disclosure of Invention
The invention aims to provide an oil-water-gas three-phase separator to solve the technical problem that a vertical three-phase separator in the prior art is low in separation efficiency. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides an oil-water-gas three-phase separator which comprises a vertical separation tank, wherein an inlet flow divider and a flow stabilizing device are arranged in the vertical separation tank, the inlet flow divider is sleeved outside the flow stabilizing device and communicated with a tangential inlet of the vertical separation tank, and the inlet flow divider can realize pre-separation of gas and liquid.
Optionally, the inlet separator includes a circular-cut inlet and a flow deflector, the circular-cut inlet forms a circular flow channel in an annular region between the vertical separation tank and the flow stabilizer, and the flow deflector is fixedly connected in the circular flow channel of the circular-cut inlet.
Optionally, the cross-sectional area of the annular flow path of the ring-cut inlet is tapered.
Optionally, if the inner diameter of the circulation flow channel is R and the inner diameter of the vertical separation tank is R, R is R/5 to R/2.
Optionally, all the guide vanes have an inward rotation angle α.
Optionally, the inward rotation angle α of the guide vane ranges from 30 ° to 45 °.
Optionally, the flow stabilizer is a flow stabilizing cylinder which is vertically through, the flow stabilizing cylinder comprises a gas phase cyclone part, a neck part and a liquid phase cyclone part which are sequentially arranged, and the inlet separator is installed at the neck part.
Optionally, the gas phase swirling part is of an inverted bell-mouth-shaped annular cavity structure.
Optionally, the neck portion is of a frustum-shaped cavity structure.
Optionally, the liquid phase swirling portion is of a cylindrical cavity structure.
According to the oil-water-gas three-phase separator provided by the invention, the inlet shunt and the flow stabilizing device are arranged in the vertical separation tank, and the multiphase fluid entering the vertical separation tank from the tangential inlet enters the inlet shunt to be subjected to gas-liquid pre-separation, so that good preparation conditions are created for the subsequent three-phase separation, the gas-liquid rapid and effective separation is realized, and the separation efficiency is greatly improved; and the flow stabilizer also provides a stable laminar flow separation environment for oil-water two-phase separation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an oil-water-gas three-phase separator according to an embodiment of the present invention;
FIG. 2 is a schematic perspective view of an inlet splitter;
FIG. 3 is a schematic perspective view of the flow stabilizer;
FIG. 4 is a schematic view of the connection of the flow stabilizer cartridge to the inlet flow splitter;
FIG. 5 is a partially enlarged schematic view of portion A of FIG. 2;
FIG. 6 is a schematic diagram showing the flow of the oil-water-gas three-phase separator during operation;
FIG. 7 is a schematic position diagram of a gas-liquid separation zone of the oil-water-gas three-phase separator;
FIG. 8 is a schematic diagram showing the position of the oil-water separation zone of the oil-water-gas three-phase separator;
FIG. 9 is a schematic position diagram of a gas phase separation zone of the oil-water-gas three-phase separator;
FIG. 10 is a schematic illustration of the position of the water phase separation zone of the oil-water-gas three-phase separator;
FIG. 11 is a schematic position diagram of an oil phase separation region of an oil-water-gas three-phase separator;
FIG. 12 is a gas phase distribution cloud of a vertical oil-water-gas three-phase separator;
FIG. 13 is a cloud of oil phase distribution of a vertical oil-water-gas three-phase separator;
FIG. 14 is a comparison of the vertical oil-water-gas three-phase separator of the present invention with the prior art.
In figure 1, a vertical separation tank; 12. a tangential inlet; 13. an exhaust pipe; 14. an oil discharge pipe; 15. a drain pipe; 2. an inlet flow splitter; 21. a circular cutting inlet; 22. a flow deflector; 3. a flow stabilizing cylinder; 31. a gas-phase swirling section; 32. a neck portion; 33. a liquid phase swirling section; 34. a vent; 4. an oil receiving mechanism; 41. an oil collecting section; 42. an oil discharge pipeline; 5. a liquid catching mechanism; 51. a mist catcher; 52. fixing the sleeve; 6. a vortex breaker;
100. a gas-liquid separation zone; 200. an oil-water separation zone; 300. a vapor phase separation zone; 400. an aqueous phase separation zone; 500. and an oil phase separation zone.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The invention provides an oil-water-gas three-phase separator which comprises a vertical separation tank 1, wherein an inlet flow divider 2 and a flow stabilizer are arranged in the vertical separation tank 1, the inlet flow divider 2 is sleeved outside the flow stabilizer, the inlet flow divider 2 is communicated with a tangential inlet 12 of the vertical separation tank 1, and the inlet flow divider 2 can realize pre-separation of gas and liquid.
An inlet flow divider 2 and a flow stabilizer are arranged in the vertical separation tank 1, and the multiphase fluid entering the vertical separation tank 1 from the tangential inlet 12 enters the inlet flow divider 2 for gas-liquid pre-separation, so that good preparation conditions are created for subsequent three-phase separation, rapid and effective separation is realized, and the separation efficiency is greatly improved; and the flow stabilizer also provides a stable laminar flow separation environment for oil-water two-phase separation.
As an alternative embodiment, as shown in fig. 2, the inlet separator includes a circular cut inlet 21 and a baffle 22, the circular cut inlet 21 forms a circular flow passage in an annular region between the vertical separation tank 1 and the flow stabilizer, and a plurality of baffles 22 are fixedly connected in the circular flow passage of the circular cut inlet 21.
The design of the guide vanes 22 on the inner side of the inlet splitter 2 can induce the gas phase to carry out rotational flow towards the gas-phase separation zone 300, and the liquid phase is split to the liquid-phase separation zone along the outer side of the inlet splitter 2, so that the rapid and effective separation of the gas phase and the liquid phase is realized. The design of the flow stabilizer improves the centrifugal strength of gas-phase and liquid-phase rotational flows and strengthens the oil-gas-water three-phase migration separation efficiency.
As an alternative embodiment, the cross-sectional area of the annular flow path surrounding the cut-out 21 is tapered.
The circular cutting inlet 21 of the inlet splitter 2 is a circular flow channel with gradually changed width, the inner diameter R of the circular cutting inlet changes from 1/2 to 1/5 of the inner diameter R of the vertical separation tank 1, and the circular cutting inlet is circumferentially distributed between the inner wall surface of the vertical separation tank 1 and the outer ring of the flow stabilizing cylinder 3.
As an alternative embodiment, all guide vanes 22 have an internal rotation angle α, see fig. 5. The inward swirl of the deflector 22 induces a swirling flow.
As an optional implementation manner, the range of the inward rotation angle α of the guide vanes 22 is 30 ° to 45 °, the number of the guide vanes 22 is 3 to 8, and the inward rotation angle and the number of the guide vanes 22 can be appropriately adjusted according to the gas-liquid ratio of the actual working condition.
As an alternative embodiment, as shown in fig. 3 and 4, the flow stabilizer is a flow stabilizing cylinder 3 penetrating up and down, the flow stabilizing cylinder 3 includes a gas phase cyclone part 31, a neck part 32 and a liquid phase cyclone part 33 arranged in sequence, and the inlet separator is mounted on the neck part 32.
The through hollow design of the flow stabilizing cylinder 3 is beneficial to providing a stable laminar flow environment for the sedimentation separation of oil phase and water phase. The gas-phase swirling portion 31 and the neck portion 32 are coaxially mounted with the liquid-phase swirling portion 33, the upper end of the neck portion 32 is connected to the lower end of the gas-phase swirling portion 31, and the lower end of the neck portion 32 is connected to the liquid-phase swirling portion 33.
The diameter of the gas-phase rotational flow part is 1/2-2/3 of the inner diameter of the vertical separation tank 1, the diameter of the fixed cylinder of the inlet flow divider 2 is 3/5-4/5 of the inner diameter of the vertical separation tank 1, and the diameter of the cylinder for the liquid-phase rotational flow is 2/3-9/10 of the inner diameter of the vertical separation tank 1.
As an alternative embodiment, the gas phase swirling portion 31 is an inverted bell-mouth-shaped annular cavity structure.
Adopt the annular cavity structure of the shape of the inverted bell mouth, when the gas-liquid ratio is higher or undulant greatly, the top of the gas phase rotational flow part 31 can adopt the enclosed construction, avoid the gas to produce the impact in the oil receiving process of the central oil receiving mechanism 4 of the stationary flow cylinder 3, at this moment, the top enclosed construction of the gas phase rotational flow part 31 is provided with the vent 34, the pressure difference inside and outside the balance.
In an alternative embodiment, the neck 32 has a frustoconical cavity configuration.
The taper angle range of the hollow frustum of the neck 32 is 20-60 degrees, the outer side surface of the hollow frustum is matched with the fixed ring cut-in opening 21, the upper end of the hollow frustum is connected with the bottom end of the gas-phase rotational flow part 31, and the lower end of the hollow frustum is connected with the upper end of the liquid-phase rotational flow part 33.
The oil collecting mechanism 4 and the flow stabilizing cylinder 3 are coaxially arranged, and an oil collecting section 41 of the oil collecting mechanism 4 is positioned at the middle upper part of the liquid phase rotational flow part 33.
The liquid catching mechanism 5 is positioned at the top in the vertical separation tank 1, wherein the diameter of the mist catcher 51 is 3-5 times of that of the exhaust pipe 13, and a wire mesh demister, a filler and the like can be added in the mist catcher 51 to catch the separated gas-phase liquid.
As an alternative embodiment, the liquid phase swirling portion 33 is a cylindrical cavity structure.
As a preferred embodiment, as shown in fig. 1 to 11, the present invention provides an oil-water-gas three-phase separator comprising a vertical separation tank 1, an inlet flow divider 2, a flow stabilizing cylinder 3, an oil collecting mechanism 4, a liquid catching mechanism 5 and a vortex breaker 6. The oil-water-gas three-phase separation process is mainly completed in the vertical separation tank 1, a tangential inlet 12 is arranged at the middle upper part of the vertical separation tank 1, an exhaust pipe 13 is arranged at the top part, a water outlet is arranged at the bottom part, and an oil discharge port is arranged on the side wall of the middle lower part of the tank body. Wherein, the inlet splitter 2 comprises a circular cutting inlet 21 and a deflector 22, which are arranged at the middle upper part of the vertical separation tank 1, and the circular cutting inlet 21 is connected with the tangential inlet 12 at the middle upper part of the vertical separation tank 1. The flow stabilizing cylinder 3 comprises a gas-phase cyclone part 31 (a gas-phase cyclone cylinder), a neck part 32 (a fixed cylinder of the inlet flow divider 2) and a liquid-phase cyclone part 33 (a liquid-phase cyclone cylinder) which are coaxially arranged from top to bottom, and a conical region at the outer side of the fixed cylinder of the inlet flow divider 2 plays a role in fixing the inlet flow divider 2. The oil collecting mechanism 4 comprises an oil collecting section 41 and an oil discharge pipe 14. The liquid trap mechanism 5 includes a mist trap 51 and a fixing sleeve 52, an upper portion of the fixing sleeve 52 is connected to the exhaust pipe 13, and a lower portion of the fixing sleeve 52 is used for fixing the mist trap 51. The vortex breaker 6 is fixed on the upper area of the water outlet at the bottom of the vertical separation tank 1.
The oil-water-gas three-phase separator comprehensively utilizes three technologies of gravity settling separation, cyclone separation and air flotation separation, adopts the concepts of induced cyclone enhanced separation of the inlet flow divider 2 and enhanced settling of the flow stabilizing cylinder 3, not only can effectively improve the oil-water-gas three-phase separation efficiency, but also can adapt to the separation of oil, water and gas three phases with different gas-liquid ratio types, and simultaneously has the advantages of compact structure, convenient installation and operation, low operation and maintenance cost and the like, and the design of a vertical structure also fundamentally solves the problems of large occupied area and low separation efficiency of the traditional oil-water-gas three-phase separator.
Fig. 7 to fig. 11 show a gas-liquid separation zone 100, an oil-water separation zone 200, a gas-phase separation zone 300, a water-phase separation zone 400 and an oil-phase separation zone 500 of the oil-water-gas three-phase separator of the present invention.
The working process of the oil-water-gas three-phase separator is as follows:
the oil-gas-water mixed liquid enters the annular cutting inlet 21 from the middle upper tangential inlet 12 in a tangential manner, after cyclone centrifugal separation, low-density gas phase is induced to swirl to the gas phase cyclone part 31 and the vertical separation tank 1 to form an annular space along the neck part 32 through the flow deflector 22, after further cyclone enhanced separation, most of the gas phase is subjected to mist-catching purification through the mist catcher 51 and then is discharged through the top exhaust pipe 13. The liquid phase separated by the ring-cut inlet 21 and the liquid phase after the rotational flow strengthening separation in the gas phase separation zone 300 enter the liquid phase separation zone by utilizing the tangential jet flow inertia rotational flow, at the moment, because the flow cross section area is suddenly increased and the pressure is reduced, part of dissolved gas in the liquid phase is released to form micro-bubbles, during the inertia medium rotational flow separation process, oil-water-gas three phases can be separated, the micro-bubbles can effectively collide and adhere to discrete oil drops to strengthen the oil-water two-phase separation process, under the condition of a certain split ratio, the oil phase and the gas phase after the rotational flow separation flow into an oil phase separation zone 500 at the center of the flow stabilizing cylinder 3 (under the condition of a certain split ratio, for example, the split ratio is 10%, 10% of fluid can enter the flow stabilizing cylinder 3, the rest 90% of liquid flows downwards), after further sedimentation separation, the gas phase is subjected to mist capturing, the oil phase is collected by the oil collecting section 41 and discharged through the oil discharge pipe 14, and the remaining water phase enters the lower part of the vertical separation tank 1, is further settled and purified, is broken by the vortex breaker 6 and is discharged from the bottom drain pipe 15.
The invention can adapt to the change of physical properties and treatment requirements of different oil-water-gas by adjusting the diameter of the ring cut-in opening 21, the number and the inclination angle of the flow deflectors 22, the flow stabilizing cylinder 3 and the like.
Compared with the conventional three-phase separator, the vertical oil-water-gas three-phase separator provided by the invention has the following characteristics:
(1) the vertical oil-water-gas three-phase separator comprehensively utilizes three multiphase flow separation technologies of gravity settling, microbubble flotation and cyclone centrifugation, the problem of rapid pre-separation of oil, gas and water three phases and the problem of difficulty in sand deposition or sand discharge are solved through the innovative structural design, the oil-water-gas three-phase separation efficiency can be enhanced through the adopted weak cyclone, and the problem of serious oil phase emulsification caused by the shearing emulsification effect caused by the cyclone is reduced.
(2) The design of the inlet splitter 2 component ensures the purpose of gas-liquid two-phase regional separation, not only effectively realizes the purpose of gas-liquid rapid pre-separation, but also can adapt to different incoming liquid and treatment requirements by adjusting the diameter of the adjusting ring cut-in 21, the number and the inclination angle of the flow deflectors 22 and the parameters of the flow stabilizing cylinder 3.
(3) Compared with the conventional three-phase separator, the cyclone effect generated by the induction of the circular cutting inlet 21 is utilized, and the gas-phase separation area 300 and the liquid-phase separation area (comprising the oil-water separation area 200, the water-phase separation area 400 and the oil-phase separation area 500) are formed by the flow stabilizing cylinder 3, so that the defects that the settling direction of oil drops carried by gas is opposite to the moving direction of airflow, the upward floating direction of bubbles carried in liquid is smaller in difference with the flowing speed of the liquid and the like are effectively overcome, the separation efficiency of oily sewage is effectively improved, and the floor area of equipment is reduced.
(4) The designed three-phase separator has the advantages of compact structure, no moving element, strong operability, easy maintenance and the like, and is beneficial to simplifying the oil-gas gathering and transportation process flow and reducing the investment.
Fig. 12-14 are related illustrations of Computational Fluid Dynamics (CFD) simulations of the performance of a vertical three-phase separator at a specific throughput. Specifically, the design throughput was 70m3/d{504m3(maximum oil amount)/d 1176m3(maximum water amount)/d (1700 m)3Under the conditions of/d (gas, 20 deg.C) }, the gas phase distribution cloud picture (figure 12), oil phase distribution cloud picture (figure 13), conventional horizontal three-phase separator and conventional three-phase separator of vertical three-phase separator are respectively shown in the figureComparison of separation effect of vertical three-phase separator (fig. 14).
FIG. 12 is a gas phase distribution cloud of a vertical three-phase separator. It can be seen from the figure that gas-liquid two-phase layering is obvious, the interface layer of the gas is only present in the middle of the inner flow stabilizing cylinder 3, and the separation disturbance of the gas on oil-water two-phase is small, which shows that the cyclone cylinder plays an important role in the separation of the gas-liquid two-phase flow passage and the gas-liquid pre-separation. It can be seen that the provision of a cyclonic cartridge is advantageous in improving the separation efficiency of the device.
Fig. 13 is a cloud picture of oil phase distribution of the vertical three-phase separator. It can be seen from the figure that the speed change at the cyclone position of the internal flow stabilizing cylinder 3 is severe, but as the oil-water two-phase rotational flow process progresses, when the oil phase reaches the lower part of the flow stabilizing cylinder 3, the speed tends to be stable, and the flow stabilizing cylinder 3 plays a role in promoting the separation of the oil phase and the water phase.
As can be seen from FIG. 14, the throughput of the three separators is 70m3When the water content and the water content in the oil are respectively 25-33% and 23-29%, the maximum water content and the maximum water content in the oil of the conventional vertical three-phase separator are respectively 32.6% and 29.3%, and the minimum water content in the oil of the designed high-efficiency compact three-phase separator are respectively 25.86% and 23.02%. Compared with the conventional vertical three-phase separator, the oil content in water is reduced by 26.7%, and the water content in oil is reduced by 21.4%. Compared with the conventional horizontal three-phase separator, the oil content in water is reduced by 9.5%, and the water content in oil is reduced by 10.1%. Under the condition of equal treatment capacity, the outer diameter and the length of the tank body of the efficient compact vertical three-phase separator are smaller than those of a conventional separator, and the occupied area is smaller. Meanwhile, the hydraulic retention time is only 2.4min at the shortest.
By comparison, the high-efficiency compact type oil-water-gas three-phase separator has the advantages of compact structure and high separation efficiency, and the effectiveness and the advancement of the vertical type three-phase separator are fully shown.
In the field of engineering application, the vertical three-phase separator can be used for multicomponent pre-separation of oil, gas and water of produced liquid of onshore and offshore oil fields, replaces the conventional complex three-phase separation with high energy consumption commonly used in the current engineering, can be used in the fields of skid-mounted modular oil field produced liquid separation of marginal oil fields and the like, and reduces the investment cost of the oil fields.
In the description of the invention, it is to be noted that "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The oil-water-gas three-phase separator is characterized by comprising a vertical separation tank (1), wherein an inlet flow divider (2) and a flow stabilizer are arranged in the vertical separation tank (1), the flow stabilizer is sleeved with the inlet flow divider (2), the inlet flow divider (2) is communicated with a tangential inlet (12) of the vertical separation tank (1), and pre-separation of gas and liquid can be realized by the inlet flow divider (2).
2. The oil-water-gas three-phase separator as claimed in claim 1, wherein the inlet separator (2) comprises a circular cut inlet (21) and a flow deflector (22), the circular cut inlet (21) forms a circular flow passage in an annular region between the vertical separation tank (1) and the flow stabilizer, and a plurality of flow deflectors (22) are fixedly connected in the circular flow passage of the circular cut inlet (21).
3. The separator according to claim 2, characterized in that the cross-sectional area of the circular flow path of the ring-cut inlet (21) is tapered.
4. The oil-water-gas three-phase separator as claimed in claim 3, wherein the inner diameter of the circulation flow channel is R, and the inner diameter of the vertical separation tank (1) is R, and R is R/5-R/2.
5. The separator of claim 2, wherein all of the baffles have an inward rotation angle α.
6. The oil-water-gas three-phase separator as claimed in claim 5, wherein the inward rotation angle α of the guide vane (22) is in the range of 30 ° to 45 °.
7. The oil-water-gas three-phase separator as claimed in any one of claims 1 to 6, wherein the flow stabilizer is a vertically through flow stabilizing cylinder (3), the flow stabilizing cylinder (3) comprises a gas phase cyclone part (31), a neck part (32) and a liquid phase cyclone part (33) which are sequentially arranged, and the inlet separator (2) is mounted on the neck part (32).
8. The oil-water-gas three-phase separator as claimed in claim 7, wherein the gas phase cyclone part (31) is of an inverted bell-mouth-shaped annular cavity structure.
9. The separator of claim 7, wherein the neck (32) has a frusto-conical cavity configuration.
10. The separator according to claim 7, wherein the liquid phase cyclone part (33) has a cylindrical cavity structure.
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| CN202110454831.6A CN112933663A (en) | 2021-04-26 | 2021-04-26 | Oil-water-gas three-phase separator |
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| CN202110454831.6A CN112933663A (en) | 2021-04-26 | 2021-04-26 | Oil-water-gas three-phase separator |
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| CN112933663A true CN112933663A (en) | 2021-06-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113893579A (en) * | 2021-09-30 | 2022-01-07 | 浙江理工大学上虞工业技术研究院有限公司 | Skid-mounted efficient vertical three-phase separator |
| CN115975671A (en) * | 2022-12-12 | 2023-04-18 | 江苏华普泰克石油装备有限公司 | Metering device suitable for petroleum three-phase separator and use method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204134375U (en) * | 2014-08-15 | 2015-02-04 | 北京日新达能技术有限公司 | A kind of composite efficient separator-combination demister |
| US20150306523A1 (en) * | 2014-04-28 | 2015-10-29 | Kbk Industries, Llc | Separation vessel with enhanced particulate removal |
| CN206613222U (en) * | 2017-03-07 | 2017-11-07 | 中国石油天然气股份有限公司 | Three-phase separator |
| CN107473306A (en) * | 2017-08-25 | 2017-12-15 | 中海油能源发展股份有限公司 | A kind of adjustable single tank twin-stage cyclone air-flotation device of stabilizing feed well |
| CN207085612U (en) * | 2017-06-29 | 2018-03-13 | 天津市振津石油天然气工程有限公司 | A kind of oil gas field gas-liquid solid separation device |
-
2021
- 2021-04-26 CN CN202110454831.6A patent/CN112933663A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150306523A1 (en) * | 2014-04-28 | 2015-10-29 | Kbk Industries, Llc | Separation vessel with enhanced particulate removal |
| CN204134375U (en) * | 2014-08-15 | 2015-02-04 | 北京日新达能技术有限公司 | A kind of composite efficient separator-combination demister |
| CN206613222U (en) * | 2017-03-07 | 2017-11-07 | 中国石油天然气股份有限公司 | Three-phase separator |
| CN207085612U (en) * | 2017-06-29 | 2018-03-13 | 天津市振津石油天然气工程有限公司 | A kind of oil gas field gas-liquid solid separation device |
| CN107473306A (en) * | 2017-08-25 | 2017-12-15 | 中海油能源发展股份有限公司 | A kind of adjustable single tank twin-stage cyclone air-flotation device of stabilizing feed well |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113893579A (en) * | 2021-09-30 | 2022-01-07 | 浙江理工大学上虞工业技术研究院有限公司 | Skid-mounted efficient vertical three-phase separator |
| CN115975671A (en) * | 2022-12-12 | 2023-04-18 | 江苏华普泰克石油装备有限公司 | Metering device suitable for petroleum three-phase separator and use method thereof |
| CN115975671B (en) * | 2022-12-12 | 2023-10-20 | 江苏华普泰克石油装备有限公司 | Metering device suitable for petroleum three-phase separator and use method thereof |
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Application publication date: 20210611 |