CN220939616U

CN220939616U - Gas-liquid separator and gas-liquid separation assembly

Info

Publication number: CN220939616U
Application number: CN202322448860.9U
Authority: CN
Inventors: 张文; 王镜波; 杨永保
Original assignee: Beijing Aokai Shixing Technology Co ltd
Current assignee: Beijing Aokai Shixing Technology Co ltd
Filing date: 2023-09-08
Publication date: 2024-05-14
Anticipated expiration: 2033-09-08

Abstract

The application provides a gas-liquid separator and a gas-liquid separation assembly, and relates to the technical field of oil-gas treatment of oil-gas fields. Wherein, this gas-liquid separator includes: the separating tube body is in a vertical round tube shape, the bottom and the top of the separating tube body are respectively communicated with a liquid phase outlet tube and a gas phase outlet tube, and the middle part of the separating tube body comprises a separating tube section; an inner pipe body which is arranged in the separating pipe body and corresponds to the separating pipe section, wherein an annular separating space is formed between the outer wall of the inner pipe body and the inner wall of the separating pipe body, the top side of the annular separating space is closed, and the bottom side of the annular separating space is open; and an inlet pipe for introducing a gas-liquid mixture into the annular separation space so that the gas-liquid mixture swirls in a thin film shape in the annular separation space.

Description

Gas-liquid separator and gas-liquid separation assembly

Technical Field

The application relates to the technical field of oil and gas treatment of oil and gas fields, in particular to a gas-liquid separator and a gas-liquid separation assembly.

Background

The gas-liquid separator is generally divided into a horizontal separator and a vertical separator, and in order to further improve the separation efficiency, the gas-liquid separator mainly depends on the traditional separator, has huge and heavy volume and is expensive in terms of cost, installation and operation, and the separation technology center of the university of U.S. Tarssa has developed the research of a gas-liquid cyclone column separator (Gas Liquid Cylindrical Cyclone separators, hereinafter referred to as GLCC) which is an innovative substitute of the traditional separator in 1995, and the GLCC is different from the traditional container-type separator, has the advantages of simple structure, compact design, light weight, low cost, no maintenance and easy installation and operation, and is more and more popular as an easy-to-operate and extremely economically attractive substitute.

The GLCC is characterized in that an inclined long pipe forming an angle of 27 degrees with the horizontal plane is arranged on a cylindrical steel pipe body to be used as an inlet, a gas-liquid mixture entering the body is subjected to unconstrained rotational flow motion to be free vortex, gas-liquid separation is realized under the action of gravity, centrifugal force, drag force and inertia force, a gas phase outlet is formed in the upper end of the GLCC body, and a liquid phase outlet is formed in the lower end of the GLCC body.

With reference to the classical structure of GLCC and the calculation method of the throughput, taking 360 tons of liquid and 120 square meters of natural gas as examples, the inner diameter of the body made of cylindrical steel pipes is about 650mm, the height is 4800mm, the equipment height is too high, and obviously it is neither practical nor possible to use as a separator for testing.

Therefore, how to provide a gas-liquid separator with small volume and high separation efficiency suitable for testing is a technical problem to be solved.

Disclosure of utility model

The embodiment of the application aims to provide a gas-liquid separator and a gas-liquid separation assembly, which mainly provide the following technical scheme:

the first aspect of the present application provides a gas-liquid separator comprising: the separating tube body is in a vertical round tube shape, the bottom and the top of the separating tube body are respectively communicated with a liquid phase outlet tube and a gas phase outlet tube, and the middle part of the separating tube body comprises a separating tube section;

An inner pipe body which is arranged in the separating pipe body and corresponds to the separating pipe section, wherein an annular separating space is formed between the outer wall of the inner pipe body and the inner wall of the separating pipe body, the top side of the annular separating space is closed, and the bottom side of the annular separating space is open; and

An inlet pipe for introducing a gas-liquid mixture into the annular separation space so that the gas-liquid mixture swirls in a thin film shape in the annular separation space;

Wherein the inlet pipe comprises: the first pipe section extends longitudinally and the bottom end of the first pipe section is communicated with the first end of the second pipe section, the second end of the second pipe section opposite to the first end is communicated with the top of the annular separation space along the tangential direction of the annular separation space, and the height of the second end of the second pipe section is not lower than that of the first end.

In some variations of the first aspect of the present application, the annular separation space comprises: an inlet portion and a separation portion at a bottom side thereof;

The inlet part corresponds to and communicates with the inlet pipe;

The radial dimension of the separation part is smaller than that of the inlet part, and the separation part is in a ring slit shape, so that the gas-liquid mixture is swirled in a film shape in the separation part.

In some variant embodiments of the first aspect of the application, the separation portion of the annular separation space is provided with a spiral extending vane, which vane is fixed to the outer wall of the inner tube body and/or to the inner wall of the separation tube body.

In some variations of the first aspect of the application, the separator tube body comprises a conduction channel between the inlet tube and the inlet portion, the conduction channel tapering in diameter from a third end communicating with the inlet tube to a fourth end communicating with the inlet portion;

The port at the fourth end of the conducting channel is a slotted hole, the length direction of the port is in the same direction as the longitudinal direction, and the width of the port is larger than the difference value between the outer diameter and the inner diameter of the separation part and smaller than the difference value between the outer diameter and the inner diameter of the inlet part.

In some variations of the first aspect of the present application, the separator tube body comprises:

A liquid phase separation tube, a cyclone separation tube and a gas phase separation tube which are sequentially connected from the bottom side to the top side;

The liquid phase separation pipe is communicated with the liquid phase outlet pipe, and the gas phase separation pipe is communicated with the gas phase outlet pipe;

The cyclone separation pipe corresponds to the separation pipe section, and the liquid phase separation pipe and the gas phase separation pipe are respectively in threaded connection with the bottom end and the top end of the inner wall of the cyclone separation pipe;

The inner diameter of the inner pipe body is larger than that of the gas phase separation pipe, and the inner pipe body is fixed at the bottom end of the inner side of the gas phase separation pipe.

In some variations of the first aspect of the present application, the inner tube is straight;

The liquid phase separation tube is characterized in that the conducting channel is formed in the top of the liquid phase separation tube, an annular groove body communicated with the conducting channel is formed in the top of the inner wall of the liquid phase separation tube so as to form the inlet part, and the bottom of the annular groove body is in smooth transition with the inner wall of the liquid phase separation tube.

In some modified embodiments of the first aspect of the present application, the top of the liquid phase separation tube is provided with the conducting channel;

The inner tube body is a tapered tube body having an outer diameter that gradually increases from a first outer diameter corresponding to the inlet portion to a second outer diameter corresponding to the separation portion.

In some variations of the first aspect of the application, the separator tube body has an inner diameter of no more than 150mm; and/or the number of the groups of groups,

The difference between the outer diameter and the inner diameter of the separation part of the annular separation space is 5-15mm; and/or the number of the groups of groups,

The ratio of the difference between the outer diameter and the inner diameter of the separation portion of the annular separation space to the inner diameter of the inner tube body is: 0.03-0.15.

In some variations of the first aspect of the application, the inner end of the liquid phase outlet pipe and the inner end of the gas phase outlet pipe are provided with rectifying means, respectively.

A second aspect of the present application provides a gas-liquid separation assembly comprising: a gas-liquid mixture inlet manifold, a gas phase outlet manifold, and a liquid phase outlet manifold;

The top end of the first pipe section of the inlet pipe of each gas-liquid separator is respectively communicated with the gas-liquid mixture inlet collecting pipe, the gas phase outlet pipe of each gas-liquid separator is respectively communicated with the gas phase outlet collecting pipe, and the liquid phase outlet pipe of each gas-liquid separator is respectively communicated with the liquid phase outlet collecting pipe.

Compared with the prior art, the gas-liquid separator and the gas-liquid separation assembly provided by the application have the advantages that the inner pipe body is arranged in the separation pipe body and corresponds to the position of the separation pipe section, so that the gas-liquid separator can form a sleeve type structure, an annular separation space is formed between the inner pipe body and the inner wall of the separation pipe body, the gas-liquid mixture is centrifugally separated in the annular separation space, the separation distance can be shortened, the flow field is stably separated, the gas-liquid separation time can be shortened, the radial dimension of the annular separation space is very small, the gas-liquid mixture can be compressed, and the gas-liquid separation effect is ensured, therefore, in the design, the inner diameter and the overall height of the gas-liquid separator can be greatly reduced, the structure is simple, the manufacturing and running costs are reduced, the gas-liquid separator is flexibly combined, the gas-liquid separator is suitable for being used for testing, and a plurality of gas-liquid separators can be connected in parallel in one pry body, and the separation assembly is formed, and the processing capacity can meet the requirements.

Drawings

The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present application will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. In the drawings, wherein like or corresponding reference numerals indicate like or corresponding parts, there are shown by way of illustration, and not limitation, several embodiments of the application, in which:

FIG. 1 schematically shows a schematic structure of a gas-liquid separator according to an embodiment of the present utility model;

FIG. 2 schematically shows a schematic cross-sectional structure of a gas-liquid separator according to an embodiment of the present utility model;

FIG. 3 schematically shows a partial enlarged schematic view of the a-part of FIG. 2;

FIG. 4 schematically shows a schematic cross-sectional structure of section A-A in FIG. 2;

Fig. 5 schematically shows a schematic structural view of the C-direction in fig. 4;

FIG. 6 schematically shows a schematic cross-sectional structure of section B-B in FIG. 2;

FIG. 7 schematically illustrates an application diagram of a gas-liquid separator according to an embodiment of the present utility model;

FIG. 8 schematically illustrates another application of the gas-liquid separator provided by the embodiment of the utility model;

FIG. 9 schematically illustrates another application of the gas-liquid separator provided by the embodiment of the utility model;

FIG. 10 schematically illustrates another application of the gas-liquid separator provided by the embodiment of the utility model;

FIG. 11 schematically illustrates another application of the gas-liquid separator provided by the embodiment of the utility model;

FIG. 12 schematically illustrates a schematic structure of a gas-liquid separation module provided by an embodiment of the present utility model;

FIG. 13 schematically illustrates a graph of single throughput versus pressure for a gas-liquid separation module provided by an embodiment of the present utility model;

reference numerals illustrate:

A separation tube body 1, a liquid phase separation tube 11, a cyclone separation tube 12, a conduction channel 121, a third end 121a, a fourth end 121b, an annular groove 122, a gas phase separation tube 13, a liquid phase outlet tube 2, a gas phase outlet tube 3, an inner tube body 4, an annular separation space 41, an inlet portion 411, a separation portion 412, an inlet tube 5, a first tube segment 51, a second tube segment 52, a rotating vane 6, and a rectifying member 7;

An electric liquid level regulating valve 1a, a differential pressure transmitter 1b, an electric air pressure regulating valve 1c, a pressure sensor 1d, a flowmeter 1e, an oil-gas-water multiphase outflow port 1f and a water meter 1g;

A gas-liquid mixture inlet manifold 8, a gas phase outlet manifold 9, and a liquid phase outlet manifold 10.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs.

Example 1

Referring to fig. 1 to 6, a first embodiment of the present utility model proposes a gas-liquid separator including: the separation tube body 1 is in a vertical round tube shape, the bottom and the top of the separation tube body 1 are respectively communicated with a liquid phase outlet tube 2 and a gas phase outlet tube 3, and the middle part of the separation tube body 1 comprises a separation tube section; an inner tube body 4 disposed inside the separator tube body 1 and corresponding to the separator tube section, wherein an annular separation space 41 is formed between an outer wall of the inner tube body 4 and an inner wall of the separator tube body 1, and a top side of the annular separation space 41 is closed and a bottom side thereof is open; and an inlet pipe 5 for introducing a gas-liquid mixture into the annular separation space 41 so that the gas-liquid mixture swirls in a thin film shape in the annular separation space 41; wherein the inlet pipe 5 comprises: a first pipe section 51 and a second pipe section 52, the first pipe section 51 extending longitudinally and having a bottom end in communication with a first end of the second pipe section 52, a second end of the second pipe section 52 opposite to the first end in communication with a top thereof in a tangential direction of the annular separation space 41, and a height of the second end of the second pipe section 52 being not lower than a height of the first end.

Specifically, this embodiment provides a small, simple structure and separation efficient sleeve type rotating film gas-liquid separator based on "shallow pool theory", and this gas-liquid separator's structure mainly includes: the separator tube body 1, the inner tube body 4 and the inlet tube 5, the separator tube body 1 is a main body structure of the gas-liquid separator, the separator tube body 1 is in a vertical circular tube shape, the bottom and the top of the separator tube body 1 are respectively communicated with the liquid phase outlet tube 2 and the gas phase outlet tube 3 and are respectively used for guiding out separated liquid and gas, the main separation part 412 of the separator tube body 1 is a separator tube section positioned in the middle, the middle of the separator tube section is the middle position of the separator tube body 1 in the axial direction or the position close to the middle, and the separator tube can be specifically set according to practical conditions; referring to fig. 2 and 3, an inner pipe body 4 is disposed inside the separation pipe body 1, and the position of the inner pipe body 4 corresponds to the separation pipe section of the separation pipe body 1, so that the separation pipe section of the gas-liquid separator forms a sleeve structure, an annular separation space 41 is formed between the inner pipe body 4 and the inner wall of the separation pipe body 1, the top layer of the annular separation space 41 is sealed and the bottom side is opened, so that the gas-liquid mixture is centrifugally separated in the annular separation space 41, the separation distance can be shortened, the separation flow field is stabilized, the gas-liquid separation time can be shortened, the radial dimension of the annular separation space 41 is very narrow, the gas-liquid mixture can be compressed, and the gas-liquid separation effect is ensured; the inlet pipe 5 is communicated with the annular separation space 41 between the separation pipe body 1 and the inner pipe body 4, the communication position can be positioned at the top of the annular separation space 41, the inlet pipe 5 is eccentrically arranged, and can be used for introducing a gas-liquid mixture into the annular separation space 41 and compressing the gas-liquid mixture into a film shape in the annular separation space 41 for high-speed rotational flow; the inlet pipe 5 comprises a first pipe section 51 and a second pipe section 52 with preset included angles, the first pipe section 51 extends longitudinally, the bottom end of the first pipe section is communicated with the first end of the second pipe section 52, the pipe sections at the connection positions of the first pipe section and the second pipe section are in smooth transition, the second end of the second pipe section 52 is communicated with the top of the annular separation space 41 along the tangential direction of the annular separation space 41, and the second pipe section 52 can be tangent to the outer annular wall of the annular separation space 41; wherein, the preset included angle can be optimally set to 90 degrees.

The separation principle of the gas-liquid separator provided in this embodiment is: in the process that the gas-liquid mixture vertically descends along the longitudinally extending first pipe section 51, annular flow is formed, initial gas-liquid separation is achieved, the gas-liquid mixture gradually enters the annular separation space 41 from the top of the annular separation space 41 through the shorter second pipe section 52, and continuously accelerates in a film shape, moves downwards while rotating, liquid drops in the gas phase rapidly enter the liquid phase under the action of various forces such as centrifugal force, drag force, gravity and buoyancy of high-speed rotation, microbubbles in the two liquid phases also rapidly enter the gas phase, so that rapid and efficient centrifugal separation of gas and liquid is achieved, the separated gas phase and liquid phase respectively move towards the top and the bottom in a secondary separation mode, high-speed rotation is still kept under the action of angular momentum, secondary separation is achieved, and finally the gas phase and liquid phase are respectively guided out of the gas phase outlet pipe 3 and the liquid phase outlet pipe 2.

In order to avoid the gas phase or liquid phase in the high-speed rotation state from affecting the outlet, rectifying components 7 may be respectively disposed at the inner end of the gas phase outlet pipe 3 and the inner end of the liquid phase outlet pipe 2, where the rectifying components 7 may be rectifying plates, and multiple through holes may be disposed at the side portions of the parts of the gas phase outlet pipe 3 and the liquid phase outlet pipe 2 located inside the separating pipe body 1, so that after the rectifying plates are disposed on the centers of rotation of the gas phase and the liquid phase, the gas phase and the liquid phase enter the gas phase outlet pipe 3 and the liquid phase outlet pipe 2 through the corresponding through holes respectively, and are finally led out.

The inner diameter of the gas-liquid separator can be designed to be not more than 150mm, and accords with the standard of a non-pressure container specified in the pressure container (GB 150), so that the gas-liquid separator can be manufactured without being designed according to the pressure container, the complicated procedures that equipment has to handle the use certificate of the pressure container and the like are reduced, and the manufacturing and operating cost is reduced; the height of the separation tube body 1 of the gas-liquid separator may be set to not more than 2.5m.

According to the above, the embodiment of the utility model proposes a gas-liquid separator, by arranging the inner pipe body 4 at the position corresponding to the separation pipe section inside the separation pipe body 1, the gas-liquid separator can form a sleeve structure, an annular separation space 41 is formed between the inner pipe body 4 and the inner wall of the separation pipe body 1, the gas-liquid mixture is centrifugally separated in the annular separation space 41, the separation distance can be shortened, the separation flow field is stabilized, the gas-liquid separation time can be shortened, the radial dimension of the annular separation space 41 is very small, the gas-liquid mixture can be compressed, and the gas-liquid separation effect is ensured, so that in such a design, the inner diameter and the overall height of the gas-liquid separator can be greatly reduced, the structure is simple, the manufacturing and running costs are reduced, flexible combination can be performed, and the gas-liquid separator is suitable for being used as a skid-mounted device.

Further, referring to fig. 2 and 3, in the embodiment, the annular separation space 41 includes: an inlet portion 411 and a separation portion 412 at a bottom side thereof; the inlet portion 411 corresponds to and communicates with the inlet pipe 5; the radial dimension of the separation part 412 is smaller than that of the inlet part 411 and the separation part 412 is in a circular slit shape, so that the gas-liquid mixture is swirled in a film shape in the separation part 412.

Specifically, in order to further improve the separation effect and efficiency, the present utility model adopts a technical scheme that the annular separation space 41 includes: the inlet part 411 and the separation part 412, the position of the inlet part 411 corresponds to and communicates with the inlet pipe 5, the radial dimension of the separation part 412 is smaller than that of the inlet part 411, so that the inlet part 411 forms a larger annular space, the separation part 412 forms an annular slit, and the two parts are smoothly transited, so that the design can realize the primary separation of gas and liquid when the gas and liquid mixture passes through the second pipe section 52 of the inlet pipe 5 and enters the larger annular space at the top of the separation pipe section, the mixture which is primarily separated gradually enters the separation part 412, and the gas and liquid mixture is compressed into a film shape and makes a high-speed rotational flow downwards, thereby realizing the rapid centrifugal separation of the gas and the liquid.

Wherein the difference between the outer diameter and the inner diameter of the separation portion 412 of the annular separation space 41 (i.e., the difference between the inner diameter of the separation tube section of the separation tube body 1 and the outer diameter of the inner tube body 4) may be 5-15mm, for example: when the inner diameter of the separation tube body 1 is set to 150m, the difference between the outer diameter and the inner diameter of the separation portion 412 may be 15mm; specifically, the difference between the outer diameter and the inner diameter of the separation portion 412 of the annular separation space 41 may be set according to the inner diameter of the separation tube body 1, and the set standard may be: the ratio of the difference between the outer diameter and the inner diameter of the separation portion 412 of the annular separation space 41 to the inner diameter of the inner tube body 4 is set to 0.03-0.15.

Further, referring to fig. 2 and 3, in an embodiment, the separation portion 412 of the annular separation space 41 is provided with a spiral vane 6, and the spiral vane 6 is fixed to the outer wall of the inner tube body 4 and/or the inner wall of the separation tube body 1.

Specifically, in order to avoid that the gas-liquid mixture flows down too fast in the annular separation space 41 and affects the separation effect, in the technical scheme adopted by the utility model, the spiral vane 6 extending in a spiral manner can be arranged in the separation part 412 of the annular separation space 41, and the design can enable the gas-liquid mixture to rotate and move down in a spiral manner after being compressed into a film shape in the separation space, so that the gas-liquid mixture can be effectively prevented from flowing down too fast, the flowing path of the gas-liquid mixture in the separation part 412 can be increased, and the separation effect can be effectively ensured.

The rotary vane 6 can be fixed on the outer wall of the inner pipe body 4 and is separated from the inner wall of the separating pipe body 1 by a small gap; or the rotary vane 6 can be fixed on the inner wall of the separating tube body 1 and is separated from the outer wall of the inner tube body 4 by a small gap; or the rotary vane 6 can be respectively fixed with the outer wall of the inner pipe body 4 and the inner wall of the separating pipe body 1; the present invention is not particularly limited herein.

It should be noted that, in the annular separating space 41, without the spiral vane 6 extending in a spiral shape, the height of the second end of the second pipe section 52 should be set to be not lower than the height of the first end, that is, the second pipe section 52 may be horizontally disposed or obliquely disposed upward so as to avoid generating momentum for pushing the gas-liquid mixture to move downward, and optimally, the second pipe section 52 of the inlet section may be disposed to extend in a horizontal direction; in the case where the spiral vane 6 extending in a spiral shape is provided in the annular separation space 41, there is no limitation on the preset angle between the second pipe section 52 and the first pipe section 51 of the inlet pipe 5, that is, the second pipe section 52 may be provided obliquely downward or may be provided obliquely upward, and of course, the second pipe section 52 is optimally provided horizontally.

Further, referring to fig. 3 to 5, in an embodiment, the separator tube body 1 includes a conducting channel 121 between the inlet tube 5 and the inlet portion 411, and the conducting channel 121 gradually decreases in diameter from a third end 121a communicating with the inlet tube 5 to a fourth end 121b communicating with the inlet portion 411; the port of the fourth end 121b of the conducting channel 121 is a oblong hole, and the length direction of the port is the same as the longitudinal direction, and the width of the port is larger than the difference between the outer diameter and the inner diameter of the separation portion 412 and smaller than the difference between the outer diameter and the inner diameter of the inlet portion 411.

Specifically, in order to realize the communication between the second pipe section 52 of the inlet pipe 5 and the inlet portion 411 of the annular separation space 41, in the technical scheme adopted by the utility model, a conducting channel 121 is formed on the separation pipe body 1, the extending direction of the conducting channel 121 is tangential to the outer annular wall of the annular separation space 41, the diameter of the conducting channel 121 gradually decreases from a third end 121a communicated with the inlet pipe 5 to a fourth end 121b communicated with the inlet portion 411, that is, the conducting channel 121 is in a tapered shape, so that the design is beneficial to improving the gas-liquid distribution at the inlet, being beneficial to forming a 0-speed interface in the annular separation space 41, and the forming of the 0-speed interface is beneficial to reducing the gas-liquid content at the conducting channel 121, reducing the short-circuit flow and improving the separation performance. In order to prevent the gas-liquid mixture introduced from the port of the fourth end 121b of the through passage 121 from directly striking the inner pipe body 4, the port of the fourth end 121b of the through passage 121 may be provided as an oblong hole having a width larger than the difference between the outer diameter and the inner diameter of the separation portion 412 of the annular separation space 41 and smaller than the difference between the outer diameter and the inner diameter of the inlet portion 411, and a distance between the edge of the through passage 121 and the corresponding tangent point of the inlet portion 411 of the annular separation space 41 may be further provided, which is a radial distance, and may be in particular 3-5mm.

Further, referring to fig. 1 and 2, in the embodiment, the separator tube body 1 includes: a liquid phase separation pipe 11, a cyclone separation pipe 12 and a gas phase separation pipe 13 which are connected in sequence from the bottom side to the top side; the top of the liquid phase separation pipe 11 is communicated with a liquid phase outlet pipe 2, and the bottom of the gas phase separation pipe 13 is communicated with a gas phase outlet pipe 3; the cyclone separation pipe 12 corresponds to a separation pipe section, and the liquid phase separation pipe 11 and the gas phase separation pipe 13 are respectively in threaded connection with the bottom end and the top end of the inner wall of the cyclone separation pipe 12; wherein, the internal diameter of the inner tube body 4 is larger than the internal diameter of the gas phase separation tube 13, and the inner tube body 4 is fixed at the inner bottom end of the gas phase separation tube 13.

Specifically, the liquid phase separation tube 11

To realize the annular separation space 41 comprising the inlet portion 411 and the separation portion 412, the following two schemes may be, but are not limited to, adopted:

The first scheme is as follows: referring to fig. 2 and 3, the inner tube body 4 is in a straight tube shape; the liquid phase separation tube 11 is provided with the above-mentioned conducting channel 121 at the top, and the top of its inner wall is provided with the annular groove 122 communicating with the conducting channel 121, and the inlet part 411 with larger radial dimension can be formed at the annular separation hollow top by the arrangement of the annular groove 122, and the bottom of the annular groove 122 and the inner wall of the liquid phase separation tube 11 are smoothly transited.

The second scheme is as follows: a conducting channel 121 is formed at the top of the liquid phase separation tube 11; the inner pipe body 4 is provided as a tapered pipe body, and the outer diameter of the inner pipe body 4 is gradually increased from a first outer diameter corresponding to the inlet portion 411 to a second outer diameter corresponding to the separation portion 412.

Several application examples of the gas-liquid separator provided in the present embodiment are illustrated below:

First application example: referring to fig. 7, a pressure difference transmitter 1b is connected between a liquid phase outlet pipe 2 and a gas phase outlet pipe 3, and an electric liquid level regulating valve 1a is installed on the liquid phase outlet pipe 2, the electric liquid level regulating valve 1a is connected with the pressure difference transmitter 1b, the pressure difference between the liquid phase outlet pipe 2 and the gas phase outlet pipe 3 is tested through the pressure difference transmitter 1b, the opening degree of the electric liquid level regulating valve 1a can be controlled according to the pressure difference, thereby ensuring the separation effect, and it is noted that the application embodiment is applied to the state that the gas phase pressure is higher and the liquid phase pressure is higher;

Second application example: referring to fig. 8, on the basis of the first embodiment of application, which is applicable to any pressure state, an electric gas pressure regulating valve 1c is provided to a gas phase outlet pipe 3, and the pressure of the gas phase outlet pipe 3 is detected by a pressure sensor 1d, and the opening degree of the electric gas pressure regulating valve 1c is controlled based on the pressure value detected by the pressure sensor 1d, thereby controlling the pressure of the gas-liquid separator;

Third application example: referring to fig. 9, on the basis of the first embodiment of application, a flow meter 1e is provided in each of the gas phase outlet pipe 3 and the liquid phase outlet pipe 2 to meter the corresponding flow rate;

Fourth application example: referring to fig. 10, on the basis of the second embodiment, a flow meter 1e is provided in each of the gas phase outlet pipe 3 and the liquid phase outlet pipe 2 to meter the corresponding flow rate;

Wherein, when the gas-liquid separator provided by the third application embodiment and the fourth application embodiment is used as a metering device, the outlet ends of the gas phase outlet pipe 3 and the liquid phase outlet pipe 2 are respectively connected to the oil-gas-water multiphase outflow port 1f, and when the fourth application embodiment is used as a metering device, please refer to fig. 11, on the basis of which, a water meter 1g can be further arranged on the liquid phase outlet pipe 2.

Example two

Referring to fig. 12, a second embodiment of the present utility model provides a gas-liquid separation assembly, which includes: a gas-liquid mixture inlet manifold 8, a gas phase outlet manifold 9 and a liquid phase outlet manifold 10; and the top end of the first pipe section 51 of the inlet pipe 5 of each gas-liquid separator is respectively communicated with the gas-liquid mixture inlet collecting pipe 8, the gas phase outlet pipe 3 of each gas-liquid separator is respectively communicated with the gas phase outlet collecting pipe 9, and the liquid phase outlet pipe 2 of each gas-liquid separator is respectively communicated with the liquid phase outlet collecting pipe 10.

Specifically, the gas-liquid separator is a standardized separator, and a plurality of gas-liquid separators can be connected in parallel in a pry body to form a separation assembly.

According to the separation principle of the gas-liquid separator, the processing capacity of the gas-liquid separator is mainly limited by the entrainment effect of the natural gas of the gas-phase separation pipe 13 on the liquid drops, so that the upward separated natural gas cannot exceed the critical flow rate, and the minimum critical velocity formula of the natural gas entrainment liquid drops in the natural gas separation section given by Song Linhu institution of the western traffic university and the like ^[30] is formula (1):

Wherein Q _max is the natural gas treatment capacity of a single gas-liquid separator, m ³/d;ρ_g is the working condition density of natural gas, kg/m ³;ρ_l is the oil-water mixing density, and kg/m ³; sigma is oil-water interfacial tension, N/m; d _top is the inner diameter of the gas phase separation section, m.

The calculation formula of the oil-gas interfacial surface tension in Chen Gulang ^[1] 1988 of Daqing petroleum institute is formula (2):

Wherein sigma _og is the air-water surface tension, mN/m; ρ _o is crude oil density, kg/m ³; t is the temperature of crude oil, and the temperature is lower than the temperature; p is the crude oil pressure, MPa.

The relationship between the single processing capacity and the pressure of the gas-liquid separator under different pressures is shown in figure 13 under the conditions that the temperature is 30 ℃, the natural gas relative density is 0.6 and the liquid phase density is 950kg/m ³ by bringing the formula (2) into the formula (1). As can be seen from FIG. 13, when 15-20MPa is applied, the single treatment capacity of the gas-liquid separator is 10 ten thousand standard per day, so that the treatment capacity of 120 ten thousand standard per day can be achieved by using 12 gas-liquid separators in parallel.

It should be noted that, in the description of the present specification, the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model; the terms "coupled," "mounted," "secured," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A gas-liquid separator, comprising:

The separating tube body is in a vertical round tube shape, the bottom and the top of the separating tube body are respectively communicated with a liquid phase outlet tube and a gas phase outlet tube, and the middle part of the separating tube body comprises a separating tube section;

2. A gas-liquid separator according to claim 1, wherein,

The annular separation space includes: an inlet portion and a separation portion at a bottom side thereof;

The inlet part corresponds to and communicates with the inlet pipe;

3. A gas-liquid separator according to claim 2, wherein,

The separation part of the annular separation space is provided with a spiral vane extending spirally, and the spiral vane is fixed on the outer wall of the inner pipe body and/or the inner wall of the separation pipe body.

4. A gas-liquid separator according to claim 2, wherein,

The separator tube body includes a conduction channel between the inlet tube and the inlet portion, the conduction channel gradually decreasing in diameter from a third end communicating with the inlet tube to a fourth end communicating with the inlet portion;

5. A gas-liquid separator according to claim 4 wherein,

The separator tube body includes:

6. A gas-liquid separator according to claim 5 wherein,

The inner pipe body is in a straight pipe shape;

7. A gas-liquid separator according to claim 5 wherein,

The top of the liquid phase separation pipe is provided with the conducting channel;

8. A gas-liquid separator according to claim 2, wherein,

The inner diameter of the separating tube body is not more than 150mm; and/or the number of the groups of groups,

9. A gas-liquid separator according to claim 1, wherein,

The inner end of the liquid phase outlet pipe and the inner end of the gas phase outlet pipe are respectively provided with a rectifying component.

10. A gas-liquid separation assembly, comprising:

A gas-liquid mixture inlet manifold, a gas phase outlet manifold, and a liquid phase outlet manifold;

A plurality of gas-liquid separators according to any one of claims 1 to 9, wherein the top end of the first pipe section of the inlet pipe of each of the gas-liquid separators is respectively communicated with the gas-liquid mixture inlet manifold, the gas-phase outlet pipe of each of the gas-liquid separators is respectively communicated with the gas-phase outlet manifold, and the liquid-phase outlet pipe of each of the gas-liquid separators is respectively communicated with the liquid-phase outlet manifold.