Gas-liquid separation device

Abstract

The utility model relates to the field of petrochemical equipment, and discloses a gas-liquid separation device. The gas-liquid separation device comprises a separation tank provided with an inner cavity, one end of the separation tank is provided with an inlet pipe communicated with the cavity, the other end of the separation tank is provided with a gas outlet pipe and a liquid outlet pipe which are communicated with the cavity, a flow breaking plate corresponding to the inlet pipe is arranged in the cavity, and a floating sealing device corresponding to the liquid outlet pipe is arranged in the cavity. The floating sealing device can seal an internal connecting channel of the liquid outlet pipe and the cavity, and through the arrangement of the flow breaking plate and the floating sealing device, the accuracy and stability of gas-liquid separation metering are improved.

Description

Technical Field

[0001] The utility model relates to the field of petrochemical equipment, in particular to a gas-liquid separation device. Background Art

[0002] Gas and oil field wellhead metering is an important task in oil field production management. Accurately measuring the wellhead output has important guiding significance for the wellhead production plan. The effect of gas-liquid separation determines the metering accuracy of the liquid and gas produced at the wellhead. The gas-liquid separation device used in the prior art can achieve effective metering when the gas and liquid content in the gas-liquid mixture is stable. However, in actual production, the conditions of each well are different, and even the liquid and gas output conditions of the same well are different at different times. In the case of unstable gas and liquid content in the gas-liquid mixture produced at the wellhead, it often leads to insufficient gas-liquid separation. The separated gas may be discharged from the liquid outlet pipe, resulting in a large deviation between the liquid and gas separation metering data in the wellhead output and the actual gas-liquid content data. Utility Model Content

[0003] The utility model aims to provide a gas-liquid separation device, which can completely separate the gas-liquid two-phase of the wellhead product and improve the accuracy of liquid and gas measurement.

[0004] In order to solve the above technical problems, the implementation method of the utility model provides a technical solution as follows:

[0005] A gas-liquid separation device comprises a separation tank with an internal cavity, one end of the separation tank is provided with an inlet pipe connected to the cavity, and the other end is provided with an air outlet pipe and a liquid outlet pipe connected to the cavity, a flow-breaking plate is provided in the cavity corresponding to the inlet pipe, and a floating sealing device is provided corresponding to the liquid outlet pipe, and the floating sealing device can seal the internal connecting channel between the liquid outlet pipe and the cavity.

[0006] Furthermore, the floating sealing device includes a float and a first sealing plate fixedly connected to the lower end of the float, and the first sealing plate is arranged opposite to the liquid outlet pipe.

[0007] Furthermore, a positioning rod is fixedly provided in the separation tank, and the floating sealing device is vertically slidably connected to the positioning rod.

[0008] Furthermore, it comprises a second sealing plate, which is annular and fixedly arranged at the end of the liquid outlet pipe facing the cavity, and the diameter of the first sealing plate is greater than the diameter of the second sealing plate.

[0009] Furthermore, the first sealing plate is made of an elastic material, and the second sealing plate is made of a rigid material.

[0010] Furthermore, a rectifying plate is provided in the separation tank, and the rectifying plate is located between the inlet pipe and the outlet pipe.

[0011] Furthermore, it comprises a mist collector, which is connected to the port of the gas outlet pipe facing the separation tank.

[0012] Furthermore, a pressure relief pipe is provided at one end of the separation tank close to the inlet pipe and connected to the cavity, and a ball valve and a safety valve are sequentially connected to the pressure relief pipe.

[0013] Furthermore, a sewage pipe is provided at the bottom of the separation tank corresponding to the inlet pipe, and the sewage pipe is connected to a sewage valve.

[0014] Furthermore, a side cover is provided at one end of the separation tank away from the inlet pipe, and the side cover can be opened to facilitate cleaning and maintenance of the interior of the separation tank.

[0015] Compared with the prior art, the gas-liquid separation device provided by the utility model can play an effective role in separation and metering when the ratio of gas component and liquid component in the gas-liquid mixture is unstable through the arrangement of flow-breaking plates and floating sealing devices, thereby improving the accuracy and stability of gas-liquid separation and metering; through the arrangement of flow-breaking plates, rectifying plates and mist collectors, the gas-liquid mixture is multiple separated, which effectively increases the gas-liquid separation efficiency and further improves the accuracy of gas-liquid separation and metering. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0017] Figure 1 It is a structural schematic diagram of a gas-liquid separation device in one embodiment of the utility model.

[0018] Explanation of the reference numerals: 1. separation tank; 2. inlet pipe; 3. flow-breaking plate; 4. rectifying plate; 5. float; 6. first sealing plate; 7. second sealing plate; 8. mist collector; 9. side cover; 10. pressure relief pipe; 11. ball valve; 12. safety valve; 13. air outlet pipe; 14. drain pipe; 15. drain valve; 16. liquid outlet pipe; 17. positioning rod; 18. gas-liquid interface. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the utility model clearer, the various embodiments of the utility model will be described in detail below with reference to the accompanying drawings. However, it can be understood by those skilled in the art that in the various embodiments of the utility model, many technical details are provided in order to enable readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical schemes claimed for protection in the claims of the present application can be implemented.

[0020] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0021] like Figure 1 As shown, in one embodiment of the utility model, a gas-liquid separation device includes a separation tank 1, which is a cavity-type structure. One end of the separation tank 1 is provided with an inlet pipe 2 connected to the internal cavity of the separation tank 1, and the inlet pipe 2 can be connected to the oil field wellhead pipeline, so as to guide the gas-liquid mixture produced from the wellhead into the cavity of the separation tank 1; the other end of the separation tank 1 opposite to the inlet pipe 2 is provided with an outlet pipe 13 and a liquid outlet pipe 16. The density of the gas is relatively small compared to the liquid. Therefore, the outlet pipe 13 is arranged at the upper end of the separation tank 1 and is connected to the inside of the cavity, and the liquid outlet pipe 16 is arranged at the lower end of the separation tank 1 and is connected to the inside of the cavity, so as to realize that the separated gas and liquid can be discharged smoothly and measured separately.

[0022] In one embodiment, a flow-breaking plate 3 is provided in the cavity of the separation tank 1 corresponding to the inlet pipe 2. After the gas-liquid mixture enters the cavity through the inlet pipe 2, it impacts the flow-breaking plate 3. Under the diversion and deflection action of the flow-breaking plate 3, due to the different densities of gas and liquid, the gas will be deflected and float on the upper part of the cavity space, and can be discharged through the gas outlet pipe 13, while the liquid is gathered together downward due to the action of gravity and can be discharged from the liquid outlet pipe 16. In order to prevent the gas from being discharged from the liquid outlet pipe 16 when the gas accounts for a large proportion in the gas-liquid mixture, thereby affecting the accuracy of the gas-liquid separation and measurement, a floating sealing device is provided in the cavity corresponding to the liquid outlet pipe 16. The floating sealing device includes a float 5 and a first sealing plate 6 fixedly connected to the lower end of the float 5. The first sealing plate 6 is arranged directly opposite to the liquid outlet pipe 16. The first sealing plate 6 can seal and isolate the internal connection channel between the cavity and the liquid outlet pipe 16 to prevent the gas from being discharged from the liquid outlet pipe 16. When the buoyancy of the float 5 is less than the gravity of the float 5 and the first sealing plate 6, the first sealing plate 6 covers and seals the port of the liquid outlet pipe 16 facing the cavity to prevent the medium in the cavity from flowing out of the liquid outlet pipe 16. When the liquid in the cavity continues to increase, so that the buoyancy of the float 5 is greater than the deadweight of the floating sealing device, the float 5 rises with the rise of the liquid level, so that the first sealing plate 6 is separated from the port of the liquid outlet pipe 16, so that the liquid in the cavity flows out of the liquid outlet pipe 16, thereby increasing the accuracy of liquid measurement. Preferably, in order to increase the sealing effect of the floating sealing device, the liquid outlet pipe 16 is provided with a second sealing plate 7 corresponding to the first sealing plate 6, and the second sealing plate 7 can better fit and seal with the first sealing plate 6, thereby increasing the sealing effect of the liquid outlet pipe 16. In an exemplary example, the second sealing plate 7 is annular and fixedly arranged at the end of the liquid outlet pipe 16 facing the cavity, the diameter of the first sealing plate 6 is larger than the diameter of the second sealing plate 7, the first sealing plate 6 is made of elastic material, such as rubber, silicone, etc., and the second sealing plate 7 is made of rigid material. When the floating device seals the liquid outlet pipe 16 due to its own weight, the edge of the second sealing plate 7 can be partially sunken into the first sealing plate 6, so that the sealing effect between the first sealing plate 6 and the second sealing plate 7 is more stable.

[0023] In one embodiment, a positioning rod 17 is vertically fixed in the cavity, and the floating sealing device is vertically slidably connected to the positioning rod 17 to prevent the horizontal position of the floating sealing device relative to the liquid outlet pipe 16 from deviating due to fluid impact in the cavity.

[0024] In one embodiment, a mist collector 8 is further provided in the cavity of the separation tank 1, and the mist collector 8 is connected to the port of the gas outlet pipe 13 toward the separation tank 1. The mist collector 8 is used to filter tiny liquid particles in the gas flowing to the gas outlet pipe 13, further increasing the gas-liquid separation efficiency and improving the accuracy of gas-liquid separation measurement. The mist collector 8 can be made of a variety of structures in the prior art, and the structure of the mist collector 8 is not described in detail here.

[0025] In one embodiment, a rectifying plate 4 is fixedly provided inside the cavity between the inlet pipe 2 and the outlet pipe 13. The gas separated by the flow-breaking plate 3 has a turbulent flow in the cavity and is still mixed with a small amount of liquid. The rectifying plate 4 is used to guide the turbulent gas flow and further increase the gas-liquid separation effect and improve the gas-liquid separation rate. The rectifying plate 4 is a grid structure arranged in a matrix. The interface of the rectifying plate 4 is consistent with the cross section of the cavity. The rectifying plate 4 can adopt a single-layer or multi-layer structure.

[0026] In one embodiment, the end of the separation tank 1 close to the inlet pipe 2 is connected to the cavity and is provided with a pressure relief pipe 10, and a ball valve 11 and a safety valve 12 are sequentially connected to the pressure relief pipe 10. The ball valve 11 and the safety valve 12 can be used to regulate the pressure in the separation tank 1 to prevent the internal pressure of the separation tank 1 from being too high and causing safety hazards. Preferably, the pressure relief pipe 10 is arranged between the inlet pipe 2 and the rectifying plate 4.

[0027] In one embodiment, a drain pipe 14 is provided at the bottom of the separation tank 1 corresponding to the inlet pipe 2 , and the drain pipe 14 is connected to a drain valve 15 , so that solid impurities in the separation tank 1 can be discharged from the drain pipe 14 to prevent accumulation of impurities in the separation tank 1 .

[0028] In one embodiment, a side cover 9 is further provided at one end of the separation tank 1 away from the inlet pipe 2 . The side cover 9 is connected to the body of the separation tank 1 by a flange. The side cover 9 can be opened to facilitate cleaning and maintenance of the interior of the separation tank 1 .

[0029] When in use, the gas-liquid mixture produced from the wellhead enters the separation tank 1 through the inlet pipe 2. After the gas-liquid mixture enters the separation tank 1, the gas-liquid mixture hits the flow-breaking plate 3 under the action of pressure and gravity, causing gas-liquid separation of the gas-liquid mixture. The separated gas is filtered and rectified by the rectifying plate 4, so that the liquid in the gas is separated again, and the separated liquid converges to the bottom of the separation tank 1. When the gas that comes out after two separations passes through the mist catcher 8 and is discharged through the gas outlet pipe 13, the tiny liquid particles in the gas are filtered by the mist catcher 8, so that the gas and liquid in the gas are further separated. The liquid produced after multiple separations converges to the bottom of the separation tank 1. When the liquid becomes more and more, the gas-liquid interface 18 continues to rise. When the buoyancy of the floating sealing device is greater than the deadweight of the floating sealing device, the float 5 floats up, driving the first sealing plate 6 to move vertically, and the first sealing plate 6 is separated from the second sealing plate 7 to open the connection channel between the cavity and the liquid outlet pipe 16, so that the liquid can be discharged through the liquid outlet pipe 16.

[0030] When the gas-liquid mixture produced from the wellhead has a larger proportion of gas and a smaller proportion of liquid, the gas-liquid interface 18 in the cavity of the separation tank 1 is low, the float 5 cannot float up or sink, and the first sealing plate 6 is in sealing contact with the second sealing plate 7, causing the liquid outlet pipe 16 to be in a sealed state, preventing gas from being discharged from the liquid outlet pipe 16.

[0031] The gas-liquid separation device provided by the utility model can play an effective role in separation and metering when the proportion of gas component and liquid component in the gas-liquid mixture is unstable through the arrangement of flow-breaking plates and floating sealing devices, thereby improving the accuracy and stability of gas-liquid separation and metering; through the arrangement of flow-breaking plates, rectifying plates and mist collectors, the gas-liquid mixture is multiple separated, which effectively increases the gas-liquid separation efficiency and further improves the accuracy of gas-liquid separation and metering.

[0032] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A gas-liquid separation device, characterized in that: The invention comprises a separation tank (1) provided with an internal cavity, wherein one end of the separation tank (1) is provided with an inlet pipe (2) connected to the cavity, and the other end is provided with an air outlet pipe (13) and a liquid outlet pipe (16) connected to the cavity, a flow-breaking plate (3) is provided in the cavity corresponding to the inlet pipe (2), and a floating sealing device is provided corresponding to the liquid outlet pipe (16), wherein the floating sealing device can seal the internal connection channel between the liquid outlet pipe (16) and the cavity to prevent gas from being discharged from the liquid outlet pipe (16).

2. A gas-liquid separation device according to claim 1, characterized in that: The floating sealing device comprises a floating ball (5) and a first sealing plate (6) fixedly connected to the lower end of the floating ball (5), wherein the first sealing plate (6) is arranged opposite to the liquid outlet pipe (16).

3. A gas-liquid separation device according to claim 2, characterized in that: A positioning rod (17) is fixedly provided in the separation tank (1), and the floating sealing device is vertically slidably connected to the positioning rod (17).

4. A gas-liquid separation device according to claim 2, characterized in that: It comprises a second sealing plate (7), which is annular and fixedly arranged at the end of the liquid outlet pipe (16) facing the cavity, and the diameter of the first sealing plate (6) is greater than the diameter of the second sealing plate (7).

5. A gas-liquid separation device according to claim 4, characterized in that: The first sealing plate (6) is made of an elastic material, and the second sealing plate (7) is made of a rigid material.

6. A gas-liquid separation device according to claim 1, characterized in that: A rectifying plate (4) is provided in the separation tank (1), and the rectifying plate (4) is located between the inlet pipe (2) and the outlet pipe (13).

7. A gas-liquid separation device according to claim 1, characterized in that: It comprises a mist collector (8), wherein the mist collector (8) is connected to a port of the gas outlet pipe (13) facing the separation tank (1).

8. The gas-liquid separation device according to claim 1, characterized in that: One end of the separation tank (1) close to the inlet pipe (2) is connected to the cavity and is provided with a pressure relief pipe (10), and a ball valve (11) and a safety valve (12) are sequentially connected to the pressure relief pipe (10).

9. The gas-liquid separation device according to claim 1, characterized in that: A sewage discharge pipe (14) is provided at the bottom of the separation tank (1) corresponding to the inlet pipe (2), and a sewage discharge valve (15) is connected to the sewage discharge pipe (14).

10. A gas-liquid separation device according to any one of claims 1 to 9, characterized in that: The separation tank (1) is also provided with a side cover (9) at one end away from the inlet pipe (2), and the side cover (9) can be opened to facilitate cleaning and maintenance of the interior of the separation tank (1).

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