CN210448183U

CN210448183U - Liquid-liquid separating device

Info

Publication number: CN210448183U
Application number: CN201920964275.5U
Authority: CN
Inventors: 刘美丽; 白雨昕; 柯宜辰; 王婧
Original assignee: Beijing Institute of Petrochemical Technology
Current assignee: Beijing Institute of Petrochemical Technology
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-05-05
Anticipated expiration: 2029-06-25

Abstract

The utility model discloses a liquid-liquid separation device, include: the inlet pipe, the wing-shaped flow guide cyclone, the separating pipe and the water outlet are sequentially connected into an integral tubular structure; the wing-shaped guide swirler is provided with a plurality of wing-shaped guide vanes; the inlet of the oil outlet pipe passes through the wing-shaped flow guide cyclone and is arranged in the separation pipe, the inlet of the oil outlet pipe is positioned at the central line of a blade carrier of the wing-shaped flow guide cyclone, and the outlet of the oil outlet pipe is arranged outside the inlet pipe; and the top flow cone is arranged on the top flow type water outlet, faces the separation pipe and is opposite to the inlet of the oil outlet pipe. The separation device generates a rotating flow field by adopting the wing-shaped flow guide cyclone, the inlet pressure and the operating pressure are far smaller than those of a conventional tangential inlet hydrocyclone, the treatment capacity is high, and the separation device has the advantages of compact structure, large treatment capacity, small resistance loss, high oil-water separation efficiency and the like, and is particularly suitable for offshore platforms. And the utility model discloses easily realize the multitube sled dress, solved the big problem of traditional tangential hydrocyclone occupation space.

Description

Liquid-liquid separating device

Technical Field

The utility model relates to a fluid separation field especially relates to a liquid-liquid separation device who carries out oil-water separation in being applicable to oil, chemical industry.

Background

Petroleum, one of the main objects of geological exploration, is a viscous, dark brown liquid, known as "industrial blood". Petroleum is a major fuel used in industrial production, and is also a raw material for many chemical industry products such as solvents, fertilizers, pesticides, plastics, and the like. However, in the entire industrial chain of petrochemical industry, oily sewage with various concentrations is generated all the time and must be treated in view of environmental protection, resource saving, and the like, and thus various oil-water separation technologies are derived. After ninety years, with continuous exploitation of oil fields, most oil fields in the east of China begin to enter the medium and high water content exploitation period, and the water content in oil field produced liquid is greatly increased and can reach 80 percent or even more than 90 percent. Therefore, a large amount of oil-water mixture is generated in the production process of both offshore oil fields and onshore oil fields, and the oil-water separation process occupies a very important position. The traditional dehydration treatment facility based on gravity separation generally has the defects of low efficiency, large occupied area, long retention time and the like, and is difficult to deal with the situation of rising of the moisture content in the middle and later periods. As a hypergravity separation technology, the cyclone separation has the advantages of simple structure, small occupied area, high separation efficiency and the like, and is widely applied, particularly for offshore oil exploitation platforms with limited deck space and bearing capacity, compact and efficient separation equipment is urgently needed to reduce the occupied area of the platforms and the upper load, and the popularization and implementation of future underwater production systems make compact and efficient equipment a necessary choice.

The hydrocyclone is a typical device for oil-water separation by utilizing a rotating flow field, but the traditional tangential inlet hydrocyclone has the defects of high inlet pressure, large minimum segmentation particle size, low monomer processing capacity, poor flow fluctuation adaptability and the like, and the further popularization and use of the device are limited. Under the introduction of the concept of inline and compact, researchers at home and abroad try to break through the design concept in order to overcome the inherent defects of the conventional tangential inlet hydrocyclone structure. For example, patent CN102728487B discloses a variable cross-section multi-vane diversion type inner cone type axial hydrocyclone; patent CN2882798 discloses an axial-flow high-efficiency hydrocyclone; patent CN102626561A discloses a pipe type flow guide plate type oil-water separator. However, the proposals of the above patents are blue-headed by the conventional tangential inlet static hydrocyclone, and have the disadvantage of small monomer treatment capacity.

SUMMERY OF THE UTILITY MODEL

Based on the problem that prior art exists, the utility model aims at providing a liquid-liquid separation device can high-efficiently realize water oil separating, guarantees the monomer treatment capacity.

The utility model aims at realizing through the following technical scheme:

an embodiment of the utility model provides a liquid-liquid separation device, include:

the device comprises an inlet pipe, a wing-shaped flow guide cyclone, a separation pipe, a top flow type water outlet and an oil outlet pipe;

the leading-in pipe, the wing-shaped flow guide cyclone, the separating pipe and the water outlet are sequentially connected into an integral tubular structure;

the wing-shaped guide swirler is provided with a plurality of wing-shaped guide vanes;

the inlet of the oil outlet pipe penetrates through the airfoil type flow guide cyclone and is arranged in the separation pipe, the inlet of the oil outlet pipe is positioned at the central line of a blade carrier of the airfoil type flow guide cyclone, and the outlet of the oil outlet pipe is arranged outside the lead-in pipe;

and the top flow cone is arranged on the top flow type water outlet and faces the inside of the separation pipe and is opposite to the inlet of the oil outlet pipe.

By the foregoing the utility model provides a technical scheme can see out, the embodiment of the utility model provides a liquid-liquid separation device, its beneficial effect is:

the leading-in pipe and the wing profile are sequentially connected into an integral tubular structure through arrangementThe flow guide cyclone, the separation pipe and the top flow type water outlet can realize centrifugal separation, and the separated oil core can be protected from oil-water mixing again due to the top flow cone arranged on the top flow type water outlet in the separation process, so that high-efficiency separation can be realized; when in use, the separation device can be conveniently connected to a pipeline, is easy to install and convenient to operate, and reduces one-time construction investment and operation cost; the separator has compact structure and high performance, and can overcome the defects of large volume and overlarge pressure drop of the existing separator; the wing-shaped flow guide cyclone provided with a plurality of wing-shaped flow guide vanes is adopted, and the wing-shaped flow guide vanes are utilized to generate a rotating flow field, so that the inlet pressure and the operating pressure are far smaller than those of a conventional tangential inlet hydrocyclone, the processing capacity is far greater than that of the conventional tangential inlet hydrocyclone, the resistance loss can be effectively reduced, the processing capacity is improved, and according to the result of Computational Fluid Dynamics (CFD) numerical simulation experiment, the processing capacity of the liquid-liquid separation device can reach 45m³H; due to the overall tubular structure, parallel skid-mounted operation of a plurality of separation devices is easy to realize, and the structural size of the separation devices is smaller than that of a conventional tangential inlet hydrocyclone under the same treatment requirement and treatment capacity.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic cross-sectional structural diagram of a liquid-liquid separation device provided in an embodiment of the present invention;

fig. 2 is a schematic cross-sectional structural view of a top flow cone and a fixing frame of a liquid-liquid separation device provided in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an interior of an airfoil-shaped flow-guiding cyclone of a liquid-liquid separation device according to an embodiment of the present invention;

fig. 4 is a schematic view of an airfoil vane of an airfoil flow-guiding cyclone of a liquid-liquid separation device according to an embodiment of the present invention;

each of the labels in the figure is: 1-an introduction tube; 2-an oil outlet pipe; 3-airfoil type flow guiding swirler; 31-airfoil guide vanes; 32-leaf carrier; 33-an outer tube; 34-the head of the blade carrier; 35-tail of leaf carrier; 4-top flow cone; 5-top flow type water outlet; 51-a drain hole; 52-a fixed frame; 6-a separation tube; 7-a lead-in zone; 8-a start-up zone; 9-a separation zone.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Details not described in the embodiments of the present invention belong to the prior art known to those skilled in the art.

As shown in fig. 1, an embodiment of the present invention provides a liquid-liquid separation device, which can be used as a liquid-liquid pipe separator for oil-water separation of oil-water mixture, including:

the device comprises an inlet pipe 1, a wing-shaped flow guide cyclone 3, a separation pipe 6, a top flow type water outlet 5 and an oil outlet pipe 2;

the leading-in pipe 1, the wing-shaped flow guide swirler 3, the separating pipe 6 and the top flow type water outlet 5 are sequentially connected into an integral tubular structure;

the airfoil guide swirler 3 is provided with a plurality of airfoil guide vanes 31;

the inlet of the oil outlet pipe 2 passes through the airfoil flow guide cyclone 3 and is arranged in the separation pipe 6, the inlet of the oil outlet pipe 2 is positioned at the central line of the blade carrier of the airfoil flow guide cyclone 3, and the outlet of the oil outlet pipe 2 is arranged outside the inlet pipe 1;

and the top flow type water outlet 5 is provided with a top flow cone 4, and the top flow cone 4 faces the separation pipe 6 and is opposite to the inlet of the oil outlet pipe 2.

Among the above-mentioned separator, induction pipe 1, wing section water conservancy diversion swirler 3, separator 6 and top flow formula delivery port 5 connect in order and be whole tubular structure:

the leading-in pipe 1, the wing-shaped flow guide swirler 3, the separating pipe 6 and the top flow type water outlet 5 are sequentially connected into an integral tubular structure through welding or flanges.

As shown in fig. 3, the airfoil-shaped flow guiding swirler 3 includes: the airfoil-shaped flow-guiding swirler 3 includes: a vane carrier 32, a plurality of airfoil guide vanes 31 and an outer tube 33;

the plurality of airfoil guide vanes 31 are uniformly distributed and fixedly arranged on the outer surface of the vane carrier 32 to form a plurality of rotational flow channels;

the outer pipe 33 is sleeved outside the airfoil guide vanes 31 on the vane carrier, and the outer pipe 33 is in close fit with each airfoil guide vane 31;

the blade carrier 32 is a cylindrical structure, a hollow structure penetrating the oil outlet pipe 2 is arranged in the blade carrier 32, the hollow structure is tightly matched with the oil outlet pipe 2, the blade carrier at the liquid inlet end of the head part of the wing-shaped flow guide cyclone 3 is arc-shaped, and the arc-shaped blade carrier at the liquid outlet end of the tail part of the wing-shaped flow guide cyclone 3 is conical. The blade carrier that connects inlet tube one side is arc promptly, also can reduce the feed liquor resistance, and the liquid of being more convenient for separates gets into wing section water conservancy diversion swirler, can promote feed liquor efficiency, and the blade carrier that connects separation tube one side is the toper, is convenient for make go out the liquid and forms powerful whirl, promotes separation efficiency.

In the airfoil guide cyclone 3 with the structure, the vane carrier 32 and the outer pipe 33 are both in a cylindrical structure, and a plurality of airfoil guide vanes 31 are arranged in the upstream space between the vane carrier 32 and the outer pipe 33, so that the flowing mixed liquid can generate tangential velocity components, and further stable rotary flow is formed in the downstream space. The airfoil guide vanes are used for generating a rotating flow field, so that the inlet pressure and the operating pressure are far smaller than those of a conventional tangential inlet hydrocyclone, the processing capacity is far greater than that of the conventional tangential inlet hydrocyclone, the resistance loss can be effectively reduced, and the processing capacity is improved.

As shown in fig. 4, in the above separation device, the plurality of guide vanes provided on the surface of the airfoil-shaped guide swirler are all airfoil-shaped guide vanes. Better rotational flow can be realized, and the subsequent separation efficiency is improved.

In the above separation device, a fixing frame 52 is provided on the top flow type water outlet 5, the top flow cone 4 is fixedly provided at the central part of the fixing frame 52, and a plurality of water drain holes 51 are provided on the fixing frame 42 around the top flow cone 4.

In the separation device, a flange is arranged at the inlet end of the inlet pipe 1; the inlet pipe 1 is conveniently connected with a liquid inlet pipe through a flange;

the outer side of the top flow type water outlet 5 is provided with a flange, and the top flow type water outlet 5 is convenient to be connected with a downstream pipeline through the flange. Preferably, a flange on the outer side of the top-flow type water outlet 5 can be arranged on the outer side of the fixing frame 52.

Preferably, the top flow cone 4 provided on the top flow type water outlet 5 and the fixing frame 51 may be flange-connected.

During actual work, liquid to be treated enters the separator from the axial inlet through the inlet pipe 1, and when flowing through the wing-shaped flow guide cyclone 3, the liquid obtains rotation momentum under the action of the wing-shaped flow guide vanes and generates stable rotation flow after being accelerated; under the action of centrifugal force, oil-water mixed liquid entering the separation pipe 6 is layered, heavy water phase is thrown to the outer pipe wall and flows to the top flow type water outlet 5, and light oil phase is collected to an oil core formed in the center and contacts the top flow cone 4 and then flows in the oil outlet pipe 2 in a counter-flow mode to be discharged.

The utility model discloses a separate this kind, owing to adopt the wing section water conservancy diversion swirler that is equipped with a plurality of wing section guide vanes, utilize wing section guide vane to produce rotatory flow field, make entry pressure and operating pressure far be less than conventional tangential entry hydrocyclone, thereby make throughput far away than conventional tangential entry hydrocyclone, can effectively reduce the resistance loss, improve the handling capacity, according to the result of computational fluid dynamics CFD numerical simulation experiment, this liquid-liquid separation device's handling capacity can reach 45m³H; the whole equipment adopts a tubular structure, so that the skid-mounted operation of multiple parallel pipes is easy to realize, and the structural size of the equipment is smaller than that of a conventional tangential inlet hydrocyclone under the same treatment requirement and treatment capacity; theThe centrifugal separation is realized in the tubular structure by the separation device, the structure is compact, the performance is high, the defects of large volume and overlarge pressure drop of the existing separator are overcome, the separation device can be directly connected to a pipeline by using a flange during working, the installation is easy, the operation is convenient, and the one-time construction investment and the operation cost are reduced. The device can be conveniently used for offshore platforms, deepwater operation and other occasions with complex environment and limited space and bearing; in the oil-water separation process, the separated oil core can be protected by the top flow cone to prevent oil and water from being mixed again, so that the aim of high-efficiency separation is fulfilled.

Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

As shown in fig. 1, the embodiment of the present invention provides a liquid-liquid separation device, including: the device comprises an inlet pipe 1, an outlet pipe 2, a wing-shaped flow guide cyclone 3, an apical flow cone 4, an apical flow type water outlet 5 and a separation pipe 6;

the guide-in pipe 1, the wing-shaped flow guide swirler 3, the top flow cone 4 and the top flow type water outlet 5 are sequentially connected through flanges or welding, and the whole body is of a tubular structure after the components are connected.

The leading-in pipe 1 and the top flow type water outlet 5 are provided with flanges connected with external equipment, and can be respectively connected with upstream and downstream pipelines and equipment.

The oil outlet pipe 2 can be positioned at the center line of a blade carrier of the airfoil-shaped diversion cyclone 3 (see fig. 1) to realize counter-flow oil discharge.

As shown in fig. 2, the top flow cone 4 is disposed on the top flow type water outlet 5 through a fixing frame 52, a plurality of water discharge holes 41 are disposed on the fixing frame 52 around the top flow cone 4, and the top flow type water outlet 5 may be connected to a downstream pipeline through a flange disposed outside the fixing frame 42.

Fig. 3 shows an airfoil-shaped flow guiding swirler 3 according to the present invention, in which the head 34 of the vane carrier 32 of the airfoil-shaped flow guiding swirler 3 is arc-shaped and the tail 35 is conical; a plurality of airfoil guide vanes 31 (see fig. 4) are uniformly distributed and fixedly arranged on the outer surface of the front end of the vane carrier 32, and the outer pipe 33 is tightly sleeved outside the airfoil guide vanes 31 in a matching manner.

When the oil-water separation pipe is used for oil-water separation, an oil-water mixture enters an introduction area 7 of the wing-shaped flow guide cyclone 3 from the introduction pipe 1 and then flows into a rotation starting area 8 in the wing-shaped flow guide cyclone 3, the mixed liquid obtains rotation kinetic energy under the action of the wing-shaped flow guide vanes 31 and flows into a separation area 9 in the separation pipe 6 at a certain tangential speed to form stable strong rotation flow, light oil is converged towards the center under the action of centrifugal force, and heavy water flows towards the outside; after the mixed liquid with strong rotation enters the separation zone 9 of the separation pipe 6, under the action of centrifugal force, oil-water two phases form an internal rotation zone and an external rotation zone with obvious boundaries, the external rotation zone is mainly heavy water phase, the internal rotation zone is mainly light oil phase, the water phase in the external rotation zone flows to the top flow type water outlet 5 in a precession mode and is discharged, the oil phase in the internal rotation zone reversely flows in a precession oil core mode under the action of central inverse pressure gradient and the top flow cone 4, and enters the inlet of the oil outlet pipe 2 and is discharged through the outlet of the oil outlet pipe 2.

The utility model discloses a separation device adopts axial flow tubular structure, can practice thrift the space that this separation device occupy to a great extent, has advantages such as compact structure, handling capacity are big, the resistance loss is little, water oil separating is efficient, especially is fit for offshore platform and uses. And the utility model discloses easily realize the multitube sled dress, solved the big problem of traditional tangential hydrocyclone occupation space. And the separating device is easy to realize multi-pipe skid-mounting, and solves the problem that the traditional tangential hydrocyclone occupies large space.

The above description is only for the preferred embodiment of the present invention, but the protection 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 all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A liquid-liquid separation apparatus, comprising:

the device comprises an inlet pipe (1), a wing-shaped flow guide swirler (3), a separation pipe (6), a top flow type water outlet (5) and an oil outlet pipe (2);

the leading-in pipe (1), the wing-shaped flow guide swirler (3), the separating pipe (6) and the top flow type water outlet (5) are sequentially connected into an integral tubular structure;

the airfoil-shaped guide swirler (3) is provided with a plurality of airfoil-shaped guide vanes;

the inlet of the oil outlet pipe (2) penetrates through the airfoil-shaped flow guide cyclone (3) and is arranged in the separation pipe (6), the inlet of the oil outlet pipe (2) is positioned at the central line of a blade carrier of the airfoil-shaped flow guide cyclone (3), and the outlet of the oil outlet pipe (2) is arranged outside the inlet pipe (1);

and a top flow cone (4) is arranged on the top flow type water outlet (5), and the top flow cone (4) faces to the inside of the separation pipe (6) and is opposite to the inlet of the oil outlet pipe (2).

2. The liquid-liquid separation device of claim 1, wherein the inlet pipe (1), the airfoil-shaped flow guide cyclone (3), the separation pipe (6) and the top flow water outlet (5) are sequentially connected into an integral tubular structure:

the guide-in pipe (1), the wing-shaped flow guide swirler (3), the separating pipe (6) and the top flow type water outlet (5) are sequentially connected into an integral tubular structure through welding or flanges.

3. Liquid-liquid separation device according to claim 1, characterized in that the airfoil-shaped flow-guiding cyclone (3) comprises: a blade carrier (32), an outer tube (33) and the plurality of airfoil guide blades (31);

the plurality of airfoil guide vanes (31) are uniformly distributed and fixedly arranged on the outer surface of the vane carrier (32) to form a plurality of rotational flow channels;

the outer pipe (33) is sleeved outside the guide vanes (31) on the vane carrier, and the outer pipe (33) is tightly matched with each guide vane (31);

the blade carrier (32) is of a cylindrical structure, a hollow structure penetrating through the oil outlet pipe (2) is arranged in the blade carrier (32), the hollow structure is tightly matched with the oil outlet pipe (2), the blade carrier (32) at the liquid inlet end of the head of the wing-shaped flow guide cyclone (3) is of a circular arc shape, and the blade carrier (32) at the liquid outlet end of the tail of the wing-shaped flow guide cyclone (3) is of a conical shape.

4. The liquid-liquid separation device according to any one of claims 1 to 3, wherein a fixing frame (52) is provided on the top flow type water outlet (5), the top flow cone (4) is fixedly provided at a central portion of the fixing frame (52), and a plurality of water drainage holes (51) are provided on the fixing frame (52) around the top flow cone (4).

5. Liquid-liquid separation device according to any one of claims 1 to 3, characterized in that the inlet end of the inlet pipe (1) is provided with a flange;

and a flange is arranged on the outer side of the top flow type water outlet (5).