CN117695758A - Two-stage gas-liquid separation experimental device - Google Patents
Two-stage gas-liquid separation experimental device Download PDFInfo
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- CN117695758A CN117695758A CN202311496442.5A CN202311496442A CN117695758A CN 117695758 A CN117695758 A CN 117695758A CN 202311496442 A CN202311496442 A CN 202311496442A CN 117695758 A CN117695758 A CN 117695758A
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- 238000000926 separation method Methods 0.000 title claims abstract description 200
- 239000007788 liquid Substances 0.000 title claims abstract description 107
- 239000012071 phase Substances 0.000 claims abstract description 58
- 239000007791 liquid phase Substances 0.000 claims abstract description 49
- 230000007246 mechanism Effects 0.000 claims abstract description 36
- 238000000605 extraction Methods 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims description 56
- 239000007792 gaseous phase Substances 0.000 claims description 2
- 230000009471 action Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 230000005484 gravity Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 230000005465 channeling Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The traditional gas-liquid cyclone separator is large in size, suitable for large-scale oil-gas fields with large flow, and inconvenient to transport and install. The application provides a secondary gas-liquid separation experimental device, which comprises a primary separation mechanism and a secondary separation mechanism which are mutually communicated, wherein the primary separation mechanism comprises a primary separation liquid phase outlet, a primary separation assembly, a liquid film extraction assembly and a primary separation gas phase outlet which are sequentially communicated, and the primary separation liquid phase outlet is communicated with a gas-liquid mixing pipeline; the secondary separation mechanism comprises a secondary separation liquid phase outlet, a secondary separation component and a secondary separation gas phase outlet which are communicated in sequence, wherein the secondary separation liquid phase outlet is communicated with the gas-liquid mixing pipeline, the secondary separation gas phase outlet is communicated with the gas-liquid mixing pipeline, and the primary separation gas phase outlet is communicated with the secondary separation component. Solves the problems of high height and large size of the prior gas-liquid separation device, and is suitable for small-flow and intermittent inflow small-medium oil fields.
Description
Technical Field
The application belongs to the technical field of gas-liquid separation equipment, and particularly relates to a secondary gas-liquid separation experimental device.
Background
With the continuous development of technology and the continuous progress of society, the demands of human beings for petroleum, natural gas and other energy sources are increasing, and the oil gas production technology level is also improved comprehensively. The accurate and reliable metering result plays a vital role in cost accounting and energy saving and consumption reduction in the oil and gas production process, and is a key guarantee for realizing rapid development of oil and gas fields. However, because the flow condition in the oil-gas mixed transportation pipe is complex, the difficulty of directly metering the oil gas in the pipe is high, and the error is large. Therefore, to obtain a more accurate and reliable metering result, it is an indispensable step to separate fluids of different phases.
However, the existing gas-liquid separation device generally has the problems of high height, large size and the like, and brings a plurality of inconveniences to transportation and installation. For small and medium-sized oil fields with small flow and intermittent inflow, the devices often cannot meet the actual requirements.
Disclosure of Invention
1. Technical problem to be solved
Based on the current traditional gas-liquid cyclone separator is bigger, is applicable to the large-scale oil gas field of great flow, and the inconvenient transportation and the problem of installation, this application provides a second grade gas-liquid separation experimental apparatus.
2. Technical proposal
In order to achieve the above purpose, the application provides a secondary gas-liquid separation experimental device, which comprises a primary separation mechanism and a secondary separation mechanism which are communicated with each other, wherein the primary separation mechanism comprises a primary separation liquid phase outlet, a primary separation assembly, a liquid film extraction assembly and a primary separation gas phase outlet which are sequentially communicated, and the primary separation liquid phase outlet is communicated with a gas-liquid mixing pipeline; the secondary separation mechanism comprises a secondary separation liquid phase outlet, a secondary separation component and a secondary separation gas phase outlet which are communicated in sequence, wherein the secondary separation liquid phase outlet is communicated with the gas-liquid mixing pipeline, the secondary separation gas phase outlet is communicated with the gas-liquid mixing pipeline, and the primary separation gas phase outlet is communicated with the secondary separation component.
Another embodiment provided herein is: the first-stage separation assembly comprises a separation cavity, the separation cavity is connected with an inlet, a filter element is arranged in the separation cavity, one end of the separation cavity is communicated with the liquid film extraction assembly, and the other end of the separation cavity is communicated with the first-stage separation liquid phase outlet.
Another embodiment provided herein is: the liquid film extraction assembly comprises an overflow cavity, wherein the overflow cavity is communicated with a three-branch pipeline, an overflow groove is arranged in the overflow cavity, the overflow groove is communicated with the separation cavity, and the three-branch pipeline is communicated with the first-stage separation gas-phase outlet and the gas-liquid mixing pipeline.
Another embodiment provided herein is: the three-branch pipeline comprises an inlet pipe, a three-branch gas-phase outlet pipe and a three-branch liquid-phase outlet pipe which are mutually communicated, the inlet pipe is communicated with the overflow cavity, the three-branch gas-phase outlet pipe is communicated with the first-stage separation gas-phase outlet, and the three-branch liquid-phase outlet pipe is communicated with the gas-liquid mixing pipeline.
Another embodiment provided herein is: the separation chamber outside is provided with first window, the three-way entry pipe outsides are provided with the second window, the overflow chamber outside is provided with the third window, the three-way gaseous phase outlet pipe outsides are provided with the fourth window, the three-way liquid phase outlet pipe outsides are provided with the fifth window.
Another embodiment provided herein is: the inlet is a tangential tapered inlet, and the inlet is arranged below the filter element.
Another embodiment provided herein is: the separation cavity is a cylindrical cavity.
Another embodiment provided herein is: the secondary gas-liquid separation experimental device is applied to small and medium-sized oil fields with small flow and intermittent inflow.
3. Advantageous effects
Compared with the prior art, the secondary gas-liquid separation experimental device that this application provided has the beneficial effect:
the application provides a second grade gas-liquid separation experimental apparatus, is a second grade gas-liquid separation experimental apparatus based on small-size cyclone, solves the problem that current gas-liquid separation device is high, the size is big, is applicable to the medium and small oil field of low discharge and intermittent type inflow.
The secondary gas-liquid separation experimental device provided by the application has the advantages of small volume, good separation effect, stable incoming flow, wide application and the like.
The secondary gas-liquid separation experimental device provided by the application can meet the gas-liquid separation requirements of small flow and intermittent inflow of small and medium-sized oil and gas fields while reducing the height; the gas phase pipeline after primary separation is additionally provided with the secondary separation, so that the gas-liquid separation effect is better, and the fluid state after secondary separation is more stable and easier to meter.
In the gas-liquid separation process, the liquid tends to adhere to the wall surface of the separator in the form of a liquid film. According to the secondary gas-liquid separation experimental device, the liquid film extraction component is additionally arranged in the primary separation mechanism, the overflow groove and the overflow cavity are formed in the barrel, the liquid film can be drained into the overflow cavity through the overflow groove, the liquid film gradually moving upwards along the wall surface under the action of gas is extracted, the liquid film and the gas are layered in the overflow cavity under the action of gravity and respectively enter the gas outlet and the liquid outlet, liquid film overflow is reduced, and the separation efficiency of the separation experimental device is improved; in this application pipeline and separating mechanism main part material are stainless steel, add ya keli window structure respectively at the face of cylinder of one-level separation main part, overflow chamber, three forked pipeline, can satisfy the operating mode condition of certain pressure, can realize separating the inspection of the interior liquid level height of experimental apparatus, separation condition again.
Drawings
FIG. 1 is a schematic diagram of a secondary gas-liquid separation experimental apparatus of the present application;
FIG. 2 is an overall cross-sectional view of the secondary gas-liquid separation experimental apparatus of the present application;
FIG. 3 is a velocity vector diagram of the primary separation mechanism of the present application;
FIG. 4 is a pressure profile of the primary separation mechanism of the present application;
fig. 5 is a phase content distribution diagram of the primary separation mechanism of the present application.
Detailed Description
Hereinafter, specific embodiments of the present application will be described in detail with reference to the accompanying drawings, and according to these detailed descriptions, those skilled in the art can clearly understand the present application and can practice the present application. Features from various embodiments may be combined to obtain new implementations or to replace certain features from certain embodiments to obtain other preferred implementations without departing from the principles of the present application.
Referring to fig. 1-5, the application provides a secondary gas-liquid separation experimental device, which comprises a primary separation mechanism and a secondary separation mechanism which are communicated with each other, wherein the primary separation mechanism comprises a primary separation liquid phase outlet 4, a primary separation component, a liquid film extraction component and a primary separation gas phase outlet 8 which are sequentially communicated, and the primary separation liquid phase outlet is communicated with a gas-liquid mixing pipeline 18; the secondary separation mechanism comprises a secondary separation liquid phase outlet 17, a secondary separation gas phase outlet 16, a secondary separation assembly 15 and a secondary separation gas phase outlet 16 which are sequentially communicated, the secondary separation liquid phase outlet 17 is communicated with a gas-liquid mixing pipeline 18, the secondary separation gas phase outlet 16 is communicated with the gas-liquid mixing pipeline 18, and the primary separation gas phase outlet 8 is communicated with the secondary separation assembly. The first-stage separation gas phase outlet 8 is connected with a second-stage separation mechanism to realize the second gas-liquid separation of the gas channel channeling under the working condition of relatively high gas-liquid flow. The secondary separation mechanism is connected with a secondary separation main body cylindrical cavity, namely a secondary separation assembly, through an inlet, the upper part is a gas phase outlet, and the lower part is a liquid phase outlet.
Further, the first-stage separation assembly comprises a separation cavity 2, the separation cavity 2 is connected with the inlet 1, a filter element 19 is arranged in the separation cavity 2, one end of the separation cavity 2 is communicated with the liquid film extraction assembly, and the other end of the separation cavity 2 is communicated with the first-stage separation liquid phase outlet 4.
Further, the liquid film extraction assembly comprises an overflow cavity 6, the overflow cavity 6 is communicated with a three-branch pipeline, an overflow groove 20 is arranged in the overflow cavity 6, the overflow groove 20 is communicated with the separation cavity 2, and the three-branch pipeline is communicated with the first-stage separation gas phase outlet 8 and the gas-liquid mixing pipeline 18. The primary separation main body cylinder, namely the upper part of the separation cavity 2, is provided with an overflow groove 20. The overflow cavity 6 is of a cylindrical structure with the diameter larger than that of the primary separation main body cylinder, an opening at the lower side of the overflow cavity 6 is connected with a three-branch pipeline, a pipeline connected with the overflow cavity 6 is a three-branch pipeline inlet, gas-liquid mixed fluid enters from the inlet, gas phase is gathered into a main pipeline of the gas phase outlet from an outlet at the upper side of the three-branch pipeline under the simultaneous action of gravity and pressure difference, and liquid phase is gathered into a main pipeline of the liquid phase outlet from an outlet at the lower side of the three-branch pipeline.
In the gas-liquid separation process, the liquid tends to adhere to the wall surface of the separation chamber 2 in the form of a liquid film. The liquid film extraction assembly drains the liquid film into the overflow chamber 6 through a slot in the barrel, i.e., overflow trough 20.
Further, the three-branch pipeline comprises an inlet pipe 5, a three-branch gas-phase outlet pipe 11 and a three-branch liquid-phase outlet pipe 12 which are communicated with each other, the inlet pipe 5 is communicated with the overflow cavity 6, the three-branch gas-phase outlet pipe 11 is communicated with the first-stage separation gas-phase outlet 8, and the three-branch liquid-phase outlet pipe 12 is communicated with the gas-liquid mixing pipeline 18.
Further, a first window 3 is arranged on the outer side of the separation cavity 2, a second window 9 is arranged on the outer side of the three-branch inlet pipe 5, a third window 7 is arranged on the outer side of the overflow cavity 6, a fourth window 10 is arranged on the outer side of the three-branch gas-phase outlet pipe 11, and a fifth window 13 is arranged on the outer side of the three-branch liquid-phase outlet pipe 12.
Further, the inlet 1 is a tangentially tapered inlet, the inlet 1 being arranged below the filter element 19. The tangential tapered inlet is used for sending the mixed fluid into the separation experimental device in an obliquely downward tapered mode, and the upper part of the filter element is connected with the gas phase outlet.
Further, the separation chamber 2 is a cylindrical chamber.
The gas-liquid mixed flow firstly enters an inclined inlet 1 pipe to form a gas-liquid stratified flow, so that the mixture is pre-separated, a tangential convergent nozzle is arranged at the joint of the inclined inlet 1 pipe and a vertical cylinder (a separation cavity 2), the acceleration of the mixed liquid is realized, the accelerated gas-liquid mixture forms two gas-phase and liquid-phase rotational flows in the vertical cylinder, liquid drops in the gas-phase rotational flows are thrown to a side wall and finally flow downwards from a liquid-phase outlet under the combined action of centrifugal force and gravity, the gas is gathered towards a central axis while rotating, gas nuclei are formed, and the gas nuclei are discharged from the gas outlet through a filter element. When the flow rates of the gas and the liquid phase are too large, the liquid phase is carried by the gas phase and tends to overflow from the gas phase outlet, and the liquid phase is specifically represented by liquid film gradually rising under the action of the gas and liquid drops wrapped in gas nuclei. The liquid film extracting component extracts the liquid film rising along the wall surface. The liquid film continuously rises to the overflow groove 20, and enters the overflow cavity 6 through the overflow groove 20, and the overflow cavity 6 realizes collection of the liquid film. The overflow cavity 6 sends the liquid film collected by the overflow cavity 6 and the accompanying entering gas phase into the first-stage liquid phase outlet 4 and the first-stage separation gas phase outlet 8 respectively through a three-branch pipeline. The liquid film extraction component can recover the liquid film to a certain extent, so that the separation efficiency of the separation mechanism is improved. For entrapment of droplets in the gas core, the liquid phase is still carried to the gas phase outlet line. At this time, the gas-liquid mixed fluid (with smaller liquid phase flow rate) enters the secondary separation assembly 15 from the inlet of the secondary separation mechanism, and the secondary gas-liquid separation is realized in the secondary separation assembly 15. The separation principle is the same as that of the first stage, two gas and liquid rotational flows are formed in the vertical cylinder, the liquid rotational flow is discharged from a lower secondary separation liquid phase outlet 17 under the combined action of centrifugal force and gravity, and the gas phase rotational flow is discharged from an upper secondary separation gas phase outlet 16.
The design pipeline and the separating device main body are made of stainless steel, and an acrylic window structure is respectively added on a large cylindrical wall surface, an overflow cavity and a three-fork pipeline of the primary separating main body.
As shown in fig. 1 to 2, a secondary gas-liquid separation experimental device based on a small cyclone separator is suitable for small-flow and intermittent inflow small-sized oil fields; comprises a primary separation mechanism and a secondary separation mechanism; the first-stage separation mechanism inlet 1 is connected with a cylindrical cavity, namely a separation cavity 2, an acrylic window of a cylindrical main body cavity, namely a first window 3 is arranged below the first-stage separation inlet 1, and a liquid film extraction assembly is arranged above the first-stage separation inlet; the liquid film extraction assembly consists of an overflow groove 20, an overflow cavity 6, a three-branch inlet pipe 5, a three-branch liquid phase outlet pipe 12 and a three-branch gas phase outlet pipe 11; the overflow groove 20 is arranged above the cylindrical cavity of the primary separation main body, so that the cylindrical cavity is communicated with the overflow cavity 6; the lower part of the overflow cavity 6 is connected with a three-fork inlet pipe 5, a three-fork gas phase outlet pipe 11 is connected with a first-stage separation gas phase outlet 8, a three-fork liquid phase outlet 12 is connected with a first-stage separation liquid phase outlet 4, and the overflow cavity 6, the three-fork gas phase outlet pipe 11 and the three-fork liquid phase outlet 12 are respectively provided with a window of the overflow cavity, namely a third window 7, a window of the three-fork gas phase outlet pipe, namely a fourth window 10 and a window of the three-fork liquid phase outlet pipe, namely a fifth window 13; the primary separation gas phase outlet 8 is connected with a cylindrical filter element 19; the secondary separation mechanism consists of a secondary separation inlet 14, a secondary separation main body cylindrical cavity, namely a secondary separation component 15, a secondary separation gas phase outlet 16 and a secondary separation liquid phase outlet 17; the secondary separation gas phase outlet 16, the secondary separation liquid phase outlet 17 and the primary separation liquid phase outlet 4 finally merge into a gas-liquid mixing pipeline 18.
Referring to fig. 3 to 5, the present application performs numerical simulation of gas-liquid flow for the primary separation mechanism: when different media are separated, the velocity vector distribution and the phase content distribution in the first-stage separation mechanism show obvious differences; the influence of the rotational flow in the separator on the speed is more obvious when the gas-water separation is carried out than when the gas-oil separation is carried out, the speed of the fluid is obviously increased along with the increase of the flow, and the objective fact is met; when the gas-liquid flow is low, the primary separation mechanism has a good gas-oil-gas-water separation effect, and the separation efficiency can reach 100%; with the increase of the flow, the liquid film is converged on the wall surface of the primary separation mechanism and continuously rises, the obvious liquid film can be seen under the gas-water separation working condition, and the obvious liquid film is not seen under the gas-oil working condition due to the higher viscosity of the oil, so that a better separation effect is presented; the inlet pressure of the first-stage separation mechanism is highest, the gas-phase outlet pressure is lowest, the liquid-phase outlet pressure is interposed between the first-stage separation mechanism and the gas-phase outlet pressure, the whole internal pressure of the separation device is obviously increased along with the increase of the flow, and the numerical simulation result is in accordance with the reality; numerical simulation results show that the primary separation mechanism has good effects on gas-oil-gas-water separation under the working condition of small flow, and particularly greatly improves the gas path liquid channeling phenomenon, and the separation efficiency is 100%.
Although the present application has been described with reference to particular embodiments, those skilled in the art will appreciate that many modifications are possible in the principles and scope of the disclosure. The scope of the application is to be determined by the appended claims, and it is intended that the claims cover all modifications that are within the literal meaning or range of equivalents of the technical features of the claims.
Claims (8)
1. A secondary gas-liquid separation experimental device is characterized in that: the device comprises a first-stage separation mechanism and a second-stage separation mechanism which are communicated with each other, wherein the first-stage separation mechanism comprises a first-stage separation liquid phase outlet, a first-stage separation assembly, a liquid film extraction assembly and a first-stage separation gas phase outlet which are sequentially communicated with each other, and the first-stage separation liquid phase outlet is communicated with a gas-liquid mixing pipeline; the secondary separation mechanism comprises a secondary separation liquid phase outlet, a secondary separation component and a secondary separation gas phase outlet which are communicated in sequence, wherein the secondary separation liquid phase outlet is communicated with the gas-liquid mixing pipeline, the secondary separation gas phase outlet is communicated with the gas-liquid mixing pipeline, and the primary separation gas phase outlet is communicated with the secondary separation component.
2. The secondary gas-liquid separation experimental device according to claim 1, wherein: the first-stage separation assembly comprises a separation cavity, the separation cavity is connected with an inlet, a filter element is arranged in the separation cavity, one end of the separation cavity is communicated with the liquid film extraction assembly, and the other end of the separation cavity is communicated with the first-stage separation liquid phase outlet.
3. The secondary gas-liquid separation experimental device according to claim 2, wherein: the liquid film extraction assembly comprises an overflow cavity, wherein the overflow cavity is communicated with a three-branch pipeline, an overflow groove is arranged in the overflow cavity, the overflow groove is communicated with the separation cavity, and the three-branch pipeline is communicated with the first-stage separation gas-phase outlet and the gas-liquid mixing pipeline.
4. The secondary gas-liquid separation experimental device according to claim 3, wherein: the three-branch pipeline comprises an inlet pipe, a three-branch gas-phase outlet pipe and a three-branch liquid-phase outlet pipe which are mutually communicated, the inlet pipe is communicated with the overflow cavity, the three-branch gas-phase outlet pipe is communicated with the first-stage separation gas-phase outlet, and the three-branch liquid-phase outlet pipe is communicated with the gas-liquid mixing pipeline.
5. The secondary gas-liquid separation experimental device according to claim 4, wherein: the separation chamber outside is provided with first window, the three-way entry pipe outsides are provided with the second window, the overflow chamber outside is provided with the third window, the three-way gaseous phase outlet pipe outsides are provided with the fourth window, the three-way liquid phase outlet pipe outsides are provided with the fifth window.
6. The secondary gas-liquid separation experimental device according to claim 5, wherein: the inlet is a tangential tapered inlet, and the inlet is arranged below the filter element.
7. The secondary gas-liquid separation experimental device according to claim 3, wherein: the separation cavity is a cylindrical cavity.
8. The secondary gas-liquid separation experimental apparatus according to any one of claims 1 to 7, wherein: the secondary gas-liquid separation experimental device is applied to small and medium-sized oil fields with small flow and intermittent inflow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311496442.5A CN117695758A (en) | 2023-11-10 | 2023-11-10 | Two-stage gas-liquid separation experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311496442.5A CN117695758A (en) | 2023-11-10 | 2023-11-10 | Two-stage gas-liquid separation experimental device |
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| Publication Number | Publication Date |
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| CN117695758A true CN117695758A (en) | 2024-03-15 |
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| CN202311496442.5A Pending CN117695758A (en) | 2023-11-10 | 2023-11-10 | Two-stage gas-liquid separation experimental device |
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| CN (1) | CN117695758A (en) |
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2023
- 2023-11-10 CN CN202311496442.5A patent/CN117695758A/en active Pending
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