Tubular slug flow trapping and separating device

Abstract

The invention discloses a tubular slug flow trapping and separating device, and relates to the technical field of gas-liquid separating devices, in particular to a tubular slug flow trapping and separating device which comprises a gas-liquid inflow pipe, a liquid accumulation box, a primary separating part, a secondary separating part, a bypass separating part, a main exhaust pipe and a main liquid discharge pipe. The first-stage separation part comprises a first-stage separation inner pipe and a first-stage separation outer pipe, the first-stage separation outer pipe is fixedly mounted on the liquid accumulation box and is communicated with the liquid accumulation box, and the first-stage separation inner pipe longitudinally penetrates through the first-stage separation outer pipe; the first-stage separation part, the second-stage separation part and the bypass separation part are integrated into a whole, and the whole device is simplified in structure, small in size and compact in structure; centrifugal force and gravity separation are ingeniously utilized, a step-by-step gradient separation mode is adopted, and the gas-liquid separation effect is continuously enhanced; the cyclone is arranged in the pipeline, gas-liquid slug flow is converted into gas-liquid spiral flow, and the influence of gas-liquid fluctuation of the slug flow on downstream separation is effectively eliminated.

Description

Technical Field

[0001] The invention relates to the technical field of gas-liquid separation devices, in particular to a tubular slug flow capturing and separating device. Background Art

[0002] Slug flow is a common flow pattern in mixed gas-liquid pipelines, occurring under a variety of conditions, including normal operation, startup, shutdown, pigging, and flow rate changes. Slug flow is characterized by the alternating movement of liquid slugs and large bubbles through the pipeline cross-section, causing dramatic fluctuations in pressure and liquid holdup within the pipeline. This can affect the liquid level stability of downstream oil and gas processing equipment, further compromising gas-liquid separation effectiveness.

[0003] Traditional separators are mainly divided into two categories: gravity type and centrifugal type. The principle of gravity sedimentation is to use the density difference between oil, gas and water to naturally stratify under the action of gravity to achieve multiphase separation. When the multiphase medium enters the separator, the gravity difference is generated due to the different density of the medium. The heavier phase settles under the action of gravity and then precipitates from the lighter phase, completing the multiphase separation task. Typical gravity separation equipment includes gravity separators and settling tanks. It can be seen from the sedimentation movement of particles that the efficiency of the separation equipment is closely related to the residence time of the mixed liquid in the equipment, and the residence time depends on the equipment volume and liquid flow rate. Therefore, in oilfield applications, the volume of horizontal separators is generally larger to improve the gas-liquid separation efficiency.

[0004] The principle of centrifugal separation is to use centrifugal force instead of gravity to achieve the separation of two-phase or multi-phase media. Depending on the method of generating centrifugal force, centrifugal separation can be divided into hydrocyclone technology and spiral tube technology. Among them, hydrocyclone technology generates centrifugal force through flow or mechanical rotational motion, thereby separating two immiscible media. Common centrifugal separation equipment includes hydrocyclones, GLCCs, spiral tubes, etc. The separation effect of centrifugal separation equipment is affected by the inlet flow rate. When the gas phase flow rate is low, the centrifugal force generated by the centrifugal separation equipment is small and the separation effect is poor. At high gas flow rates, the energy consumption of the equipment increases and the resistance loss increases.

[0005] In summary, the existing gas-liquid separation device has a complex structure, is greatly affected by gas-liquid fluctuations, and has low separation efficiency and poor separation effect. In order to overcome the shortcomings of the existing technology, this case is specially proposed to solve them. Summary of the Invention

[0006] (1) Technical problems solved To address the shortcomings of the existing technology, the present invention provides a tubular slug flow capture and separation device that solves the problems raised in the above-mentioned background art. The present invention provides a tubular slug flow capture and separation device that cleverly utilizes the principle of gas-liquid stage-by-stage separation to effectively eliminate slug flow and achieve efficient gas-liquid separation.

[0007] (2) Technical solution To achieve the above objectives, the present invention is implemented through the following technical solutions: a tubular slug flow capture and separation device, comprising a gas-liquid inlet pipe, a liquid accumulation box, a primary separation component, a secondary separation component, a bypass separation component, a main exhaust pipe, and a main liquid discharge pipe; the primary separation component comprises a primary separation inner pipe and a primary separation outer pipe, the primary separation outer pipe is fixedly mounted on the liquid accumulation box and the two are connected, the primary separation inner pipe longitudinally penetrates the primary separation outer pipe, and a primary liquid reflux cavity is formed between the primary separation inner pipe and the primary separation outer pipe, and the primary liquid reflux cavity is connected to the internal cavity of the primary separation inner pipe; the outflow end of the gas-liquid inflow pipe is fixedly mounted on the inflow end of the primary separation inner pipe and the two are connected; the secondary separation component comprises a secondary cyclone, a secondary separation inner pipe, a secondary separation outer pipe, and a separation float, the secondary separation One end of the outer tube is fixedly installed with the outflow end of the first-stage separation inner tube and the two are connected, and the other end of the secondary separation outer tube is fixedly installed with the main exhaust pipe and the two are connected; the secondary separation inner tube is inserted into the interior of the secondary separation outer tube and the two are fixedly connected, and a secondary liquid reflux cavity is formed between the secondary separation inner tube and the secondary separation outer tube, and the secondary liquid reflux cavity is connected with the internal cavity of the secondary separation inner tube, and the secondary separation inner tube is connected with the main exhaust pipe, the separation float is installed inside the secondary separation inner tube, and the secondary cyclone is installed inside the secondary separation inner tube; one end of the bypass separation component is connected with the main exhaust pipe, and the other end of the bypass separation component is connected with the liquid accumulation tank, and a connecting pipe is installed in the middle of the bypass separation component, and the end of the connecting pipe away from the bypass separation component is connected with the middle of the secondary separation outer tube.

[0008] Optionally, the bypass separation component includes a bypass separation inner tube and a bypass separation outer tube, the middle part of the bypass separation inner tube passes through the top wall of the bypass separation outer tube and the two are fixedly connected, and the lower part of the bypass separation inner tube extends into the middle part of the bypass separation outer tube, and an annular cavity is formed between the lower part of the bypass separation inner tube and the inner side wall of the bypass separation outer tube; the connecting tube is fixedly installed with the bypass separation outer tube, and the connecting tube is connected with the annular cavity; the end of the bypass separation inner tube away from the bypass separation outer tube is fixedly installed with the main exhaust pipe and the two are connected.

[0009] Optionally, the bypass separation component also includes a separation floating screen, which is slidably mounted on the inner wall of the bypass separation outer tube, and the overall density of the separation floating screen is less than the density of water; the inlet end of the main drainage pipe passes through a side wall of the liquid storage tank and the two are fixedly mounted, the inlet end of the main drainage pipe is connected to the interior of the liquid storage tank, and a valve plate is hinged at the inlet end port of the main drainage pipe, and a traction rope is tied to the separation floating screen, and the end of the traction rope away from the separation floating screen is tied to the valve plate; the separation floating screen rises or falls with the liquid level, and the separation floating screen drives the valve plate to rotate partially through the traction rope, and the opening of the valve plate on the main drainage pipe becomes larger or smaller.

[0010] Optionally, the primary separation component further includes a primary cyclone, a plurality of separation holes are opened on the circumferential side wall of the primary separation inner tube, and the primary cyclone is rotatably installed inside the primary separation inner tube.

[0011] Optionally, the secondary separation inner tube is composed of a straight tube section and an extended tube section, the extended tube section is trumpet-shaped, and a plurality of separation slits arranged along the circumference are opened on the side wall of the extended tube section. The separation float is fixedly installed on the extended tube section, and the secondary cyclone is rotatably installed in the straight tube section of the secondary separation inner tube.

[0012] Optionally, a limiting orifice plate is fixedly installed on the inner wall of the straight pipe section of the secondary separation inner tube; the separation float is a cylindrical structure, the diameter of the cylinder is 0.85-0.95 times the diameter of the secondary separation inner tube, the cylinder is filled with metal foam, and an air hole is provided on the outlet wall of the cylinder.

[0013] (3) Beneficial effects The present invention provides a tubular slug flow capture and separation device, which has the following beneficial effects: This tubular slug flow capture and separation device integrates the primary, secondary and bypass separation components into a whole. The overall device has a simplified structure, a small volume and a compact structure. It cleverly utilizes centrifugal force and gravity separation and adopts a step-by-step gradient separation mode to continuously enhance the gas-liquid separation effect. By building a cyclone into the pipeline, the gas-liquid slug flow is converted into a gas-liquid spiral flow, effectively eliminating the influence of the gas-liquid fluctuation of the slug flow on downstream separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0015] Figure 1 This is a schematic cross-sectional view of a tubular slug flow capture and separation device according to the present invention; Figure 2 It is a schematic cross-sectional structural diagram of a primary separation component in a tubular slug flow capture and separation device of the present invention; Figure 3 It is a schematic cross-sectional structural diagram of a secondary separation component in a tubular slug flow capture and separation device of the present invention; Figure 4 This is a schematic diagram of the layout of the separation slits on the secondary separation inner tube in a tubular slug flow capture and separation device of the present invention; Figure 5This is a schematic cross-sectional view of a separation float in a tubular slug flow capture and separation device according to the present invention; Figure 6 It is a schematic cross-sectional structural diagram of a bypass separation component in a tubular slug flow capture and separation device of the present invention; Figure 7 This is a schematic cross-sectional view of a connecting pipe in a tubular slug flow capture and separation device according to the present invention; Figure 8 It is a schematic cross-sectional structural diagram of a separation floating screen in a tubular slug flow capture and separation device of the present invention; Figure 9 This is a schematic diagram of the working principle of a tubular slug flow capture and separation device of the present invention.

[0016] In the figure: 1. gas-liquid inlet pipe; 2. primary separation component; 3. secondary separation component; 4. bypass separation component; 5. main exhaust pipe; 6. main liquid discharge pipe; 7. liquid accumulation tank; 8. connecting pipe; 9. primary separation inner pipe; 10. primary separation outer pipe; 11. primary cyclone; 12. separation hole; 13. flange; 14. secondary separation inner pipe; 15. secondary separation outer pipe; 16. secondary cyclone; 17. limiting orifice plate; 18. separation float; 19. separation slit; 20. bypass separation inner pipe; 21. bypass separation outer pipe; 22. separation float screen; 23. traction rope; 24. valve plate; 25. liquid permeable hole; 26. metal foam; 27. air vent; 28. support leg. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as instructions or implications.

[0018] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them.

[0019] See also Figures 1 to 9 The present invention provides a technical solution: a tubular slug flow capture and separation device, comprising a gas-liquid inlet pipe 1, a liquid storage tank 7, a primary separation component 2, a secondary separation component 3, a bypass separation component 4, a main exhaust pipe 5, and a main liquid discharge pipe 6. A plurality of support legs 28 are fixedly mounted below the liquid storage tank 7.

[0020] Among them, such as Figure 1 As shown, the gas-liquid inlet pipe 1 extends from the bottom of the liquid storage tank 7 through the liquid storage tank 7 (the penetration is sealed to prevent water leakage). The outflow end of the gas-liquid inlet pipe 1 is connected to the inflow end of the primary separation component 2; the outflow end of the primary separation component 2 is connected to the inflow end of the secondary separation component 3, and the outflow end of the secondary separation component 3 is connected to the inflow end of the main exhaust pipe 5. The middle of the secondary separation component 3 is connected to the middle of the bypass separation component 4. The gas outflow end of the bypass separation component 4 is connected to the main exhaust pipe 5, and the liquid outflow end of the bypass separation component 4 is connected to the main liquid discharge pipe 6. Gas-liquid separation mainly consists of three parts: primary separation in the primary separation component 2, secondary separation in the secondary separation component 3, and auxiliary separation in the bypass separation component 4. Through step-by-step separation, the liquid content in the gas flow is continuously reduced. The gas-liquid inlet pipe 1 is used to transport a gas-liquid mixed fluid. After the primary, secondary, and auxiliary separations, the gas-liquid mixed fluid produces liquid and gas. The produced liquid is discharged through the main liquid discharge pipe 6, and the produced gas is discharged through the main exhaust pipe 5.

[0021] The first-stage separation component 2 includes a first-stage separation inner tube 9 and a first-stage separation outer tube 10. The first-stage separation outer tube 10 is fixedly mounted on the liquid storage tank 7 and the two are connected. The first-stage separation inner tube 9 longitudinally penetrates the first-stage separation outer tube 10, and a first-stage liquid reflux chamber is formed between the first-stage separation inner tube 9 and the first-stage separation outer tube 10. The first-stage liquid reflux chamber is connected to the internal cavity of the first-stage separation inner tube 9. The outflow end of the gas-liquid inflow pipe 1 is fixedly mounted to the inflow end of the first-stage separation inner tube 9 and the two are connected. The first-stage separation component 2 also includes a first-stage cyclone 11. A plurality of separation holes 12 are opened on the circumferential side wall of the first-stage separation inner tube 9. The first-stage cyclone 11 is rotatably mounted inside the first-stage separation inner tube 9.

[0022] Among them, such as Figure 1 Figure 2As shown, the first-stage cyclone 11 includes a first spiral blade and a first rotating shaft. The first spiral blade is mounted on the outer wall of the first rotating shaft and the two are rotatably connected. The first rotating shaft is fixedly mounted on the inner wall of the first-stage separation inner tube 9. The gas-liquid inlet pipe 1 conveys the gas-liquid mixed fluid into the first-stage separation inner tube 9. As the gas-liquid mixed fluid flows through the first-stage cyclone 11, it drives the first spiral blade to rotate. At the same time, the first spiral blade reacts and pushes the gas-liquid mixed fluid into a spiral flow. During this spiral flow, the gas-liquid mixed fluid is subjected to centrifugal force. Most of the liquid flows through the various separation holes 12 into the first-stage liquid reflux chamber. Under the action of gravity, the liquid in the first-stage liquid reflux chamber flows into the liquid storage tank 7. The remaining gas-liquid mixed fluid continues to flow upward.

[0023] The secondary separation component 3 includes a secondary cyclone 16, a secondary separation inner tube 14, a secondary separation outer tube 15, and a separation float 18. One end of the secondary separation outer tube 15 is fixedly mounted to and communicates with the outflow end of the primary separation inner tube 9, and the other end of the secondary separation outer tube 15 is fixedly mounted to and communicates with the main exhaust pipe 5. The secondary separation inner tube 14 is inserted into and fixedly connected to the secondary separation outer tube 15. A secondary liquid reflux chamber is formed between the secondary separation inner tube 14 and the secondary separation outer tube 15. The secondary liquid reflux chamber is communicated with the internal cavity of the secondary separation inner tube 14. The secondary separation inner tube 14 is communicated with the main exhaust pipe 5. The separation float 18 is mounted inside the secondary separation inner tube 14, and the secondary cyclone 16 is mounted inside the secondary separation inner tube 14. The secondary separation inner tube 14 is composed of a straight tube section and an extended tube section. The extended tube section is trumpet-shaped. A plurality of separation slits 19 arranged along the circumference are opened on the side wall of the extended tube section. The separation float 18 is fixedly installed in the extended tube section. The secondary cyclone 16 is rotatably installed in the straight tube section of the secondary separation inner tube 14.

[0024] Among them, such as Figures 4 and 5As shown, the outflow end of the first-stage separation inner tube 9 and the inflow end of the second-stage separation outer tube 15 are fixedly installed via a flange 13, and a sealing gasket is provided at the flange 13. The second-stage cyclone 16 includes a second spiral blade and a second rotating shaft. The second spiral blade is mounted on the outer wall of the second rotating shaft and the two are rotatably connected. The second rotating shaft is fixedly installed on the inner wall of the second-stage separation inner tube 14. The first-stage separation inner tube 9 conveys the gas-liquid mixed fluid into the second-stage separation outer tube 15. Since the gas-liquid mixed fluid is in a vortex state at this time, most of the liquid in the gas-liquid mixed fluid is affected by centrifugal force and adheres to the inner wall of the second-stage separation outer tube 15. This part of the liquid flows into the second-stage liquid reflux chamber. The liquid vortex in the second-stage liquid reflux chamber passes through the inlet of the connecting pipe 8 and is discharged through the connecting pipe 8. The remaining portion of the gas-liquid mixed fluid flows into the secondary separation inner tube 14. This portion of the gas-liquid mixed fluid flows and drives the second spiral blade to rotate. At the same time, the second spiral blade reacts and drives the gas-liquid mixed fluid to spirally flow. During the spiral flow, the gas-liquid mixed fluid is subjected to centrifugal force, and the liquid adheres to the inner wall of the secondary separation inner tube 14. The liquid flows through the various separation slits 19 and enters the secondary liquid reflux chamber. The liquid in the secondary liquid reflux chamber is discharged through the connecting pipe 8. The gas produced by the secondary separation inner tube 14 flows into the main exhaust pipe 5 and is discharged through the main exhaust pipe 5.

[0025] The extended pipe section of the secondary separation inner tube 14 has a plurality of separation slits 19 arranged circumferentially thereon. Liquid films and droplets flowing along the extended pipe section of the secondary separation inner tube 14 are separated from the airflow by centrifugal force through the separation slits 19 .

[0026] Specifically, a limiting orifice plate 17 is fixedly mounted on the inner wall of the straight section of the secondary separation inner tube 14. The separation float 18 is a cylindrical structure with a diameter 0.85-0.95 times the diameter of the secondary separation inner tube 14. The cylinder is filled with metal foam 26, and a vent hole 27 is provided on the cylindrical outlet wall.

[0027] The limiting orifice plate 17 is provided with numerous mesh holes so as not to affect the flow of the fluid. The separation float 18 and the metal foam 26 located therein are used to capture fine droplets in the airflow.

[0028] One end of the bypass separation component 4 is connected to the main exhaust pipe 5, and the other end of the bypass separation component 4 is connected to the liquid storage tank 7. A connecting pipe 8 is installed in the middle of the bypass separation component 4, and the end of the connecting pipe 8 away from the bypass separation component 4 is connected to the middle of the secondary separation outer pipe 15.

[0029] Specifically, the bypass separation component 4 includes a bypass separation inner tube 20 and a bypass separation outer tube 21. The middle portion of the bypass separation inner tube 20 extends through the top wall of the bypass separation outer tube 21, and the two are fixedly connected. The lower portion of the bypass separation inner tube 20 extends into the middle portion of the bypass separation outer tube 21, forming an annular cavity between the lower portion of the bypass separation inner tube 20 and the inner sidewall of the bypass separation outer tube 21. The connecting pipe 8 is fixedly mounted to the bypass separation outer tube 21 and communicates with the annular cavity. The end of the bypass separation inner tube 20 away from the bypass separation outer tube 21 is fixedly mounted to the main exhaust pipe 5, and the two are connected.

[0030] More specifically, the bypass separation component 4 also includes a separation float screen 22, which is slidably mounted on the inner sidewall of the bypass separation outer tube 21. The overall density of the separation float screen 22 is less than that of water, and the separation float screen 22 is provided with a plurality of liquid-permeable holes 25 along the direction of gravity. The inlet end of the main drainage pipe 6 penetrates a sidewall of the liquid storage tank 7, and the two are fixedly mounted. The inlet end of the main drainage pipe 6 communicates with the interior of the liquid storage tank 7. A valve plate 24 is hingedly connected to the inlet end of the main drainage pipe 6. A traction rope 23 is attached to the separation float screen 22, with the end of the traction rope 23 away from the separation float screen 22 being tied to the valve plate 24. As the separation float screen 22 rises or falls with the liquid level, the traction rope 23 drives the valve plate 24 to partially rotate, causing the valve plate 24 to open wider or narrower on the main drainage pipe 6.

[0031] The liquid output from the connecting pipe 8 flows into the annular cavity, where it flows downward under the influence of gravity and then flows into the liquid storage tank 7 through the bypass separation outer pipe 21. The overall density of the separation float 22 is less than that of water, allowing the separation float 22 to float on the water surface. The liquid flowing in the bypass separation outer pipe 21 flows through the various liquid permeable holes 25 provided in the separation float 22. When the water level in the bypass separation outer pipe 21 rises, the separation float 22 floats upward. The separation float 22 is pulled by the traction rope 23 to pull the valve plate 24, which opens wider, allowing the water in the liquid storage tank 7 to be quickly discharged through the main drainage pipe 6.

[0032] The working principle of the present invention is as follows: The gas-liquid separation of the present invention mainly consists of three parts: primary separation by the primary separation component 2, secondary separation by the secondary separation component 3, and auxiliary separation by the bypass separation component 4. Through step-by-step separation, the liquid content in the gas flow is continuously reduced.

[0033] like Figure 9 As shown, the slug flow enters the primary separation component 2 through the gas-liquid inlet pipe 1. The gas-liquid two-phase fluid generates a spiral motion under the action of the first spiral blade of the primary cyclone 11, which changes the flow pattern of the upstream slug flow. That is, under the action of centrifugal force, the liquid phase with higher density flows along the pipe wall to form an annular liquid film, while the gas phase with lower density flows in the center of the pipe to form a gas core, thus forming a spiral annular flow pattern suitable for separation.

[0034] When the spiraling liquid film passes through the separation holes 12 installed in the primary separation inner tube 9, initial separation occurs under the action of centrifugal force. Most of the liquid film passes through the separation holes 12 and enters the primary liquid reflux chamber, where it settles under gravity and accumulates in the liquid accumulator 7. A small amount of liquid phase enters the secondary separation component 3 with the airflow, and a small amount of liquid phase flows through the secondary cyclone 16. When the high-speed airflow passes through the second spiral blades, centrifugal separation occurs, and the liquid phase is thrown toward the outer wall. Several separation slits 19 are provided in the sidewall of the secondary separation inner tube 14. Liquid droplets pass through the separation slits 19 and enter the annular chamber (secondary liquid reflux chamber) between the secondary separation inner tube 14 and the secondary separation outer tube 15. Under the action of gravity, the liquid droplets fall back to the primary separation inner tube 9 or are carried by the gas through the connecting pipe 8 and into the bypass separation component 4. Most of the gas passes through the metal foam 26 in the separation float 18, and the liquid droplets carried by the airflow are trapped. The separated dry gas enters the main exhaust pipe 5 through the air vents 27.

[0035] When the gas flow rate is high, the separation float 18 climbs along the secondary separation inner tube 14 under the action of the airflow, thereby increasing the effective flow area of ​​the separation slit 19. More air can enter the annular chamber (secondary liquid reflux chamber) between the secondary separation inner tube 14 and the secondary separation outer tube 15 through the separation slit 19, and then enter the bypass separation component 4 through the connecting pipe 8 for further separation. When the gas flow rate is low, the separation float 18 descends under the action of gravity and is restricted by the limiting orifice 17. Even at extremely low flow rates, the separation float 18 will not fall and touch the secondary cyclone 16.

[0036] When the gas carrying liquid droplets from the secondary separation component 3 enters the bypass separation component 4 through the connecting pipe 8 and is separated again, Figure 7 As can be seen, the connecting tube 8 enters the bypass separation outer tube 21 tangentially and then spirals along the inner wall of the bypass separation outer tube 21. Under the action of centrifugal force, the denser liquid droplets flow along the tube wall to form a liquid film, while the less dense gas flows in the center of the tube. Under the action of gravity, the liquid film sinks to the bottom of the bypass separation outer tube 21 and flows into the liquid storage tank 7 through the liquid permeable hole 25. The gas phase then enters the main exhaust pipe 5 through the central bypass separation inner tube 20.

[0037] When the liquid level in the liquid storage tank 7 is too high, the liquid phase will enter the bypass separation outer tube 21 of the bypass separation component 4, pushing the separation floating screen 22 on the gas-liquid interface upward. The separation floating screen 22 and the valve plate 24 are connected by a traction rope 23. Under the pulling force of the traction rope 23, the opening of the valve plate 24 increases, and the discharge volume of the main drainage pipe 6 increases accordingly, thereby quickly reducing the liquid level in the liquid storage tank 7.

[0038] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A tubular slug flow capture and separation device, characterized by: It comprises a gas-liquid inlet pipe (1), a liquid storage tank (7), a primary separation component (2), a secondary separation component (3), a bypass separation component (4), a main exhaust pipe (5), and a main liquid discharge pipe (6); The first-stage separation component (2) includes a first-stage separation inner tube (9) and a first-stage separation outer tube (10), the first-stage separation outer tube (10) is fixedly mounted on the liquid storage box (7) and the two are in communication, the first-stage separation inner tube (9) longitudinally penetrates the first-stage separation outer tube (10), and a first-stage liquid reflux cavity is formed between the first-stage separation inner tube (9) and the first-stage separation outer tube (10), and the first-stage liquid reflux cavity is in communication with the internal cavity of the first-stage separation inner tube (9); the outflow end of the gas-liquid inflow pipe (1) is fixedly mounted on the inflow end of the first-stage separation inner tube (9) and the two are in communication; The secondary separation component (3) includes a secondary cyclone (16), a secondary separation inner tube (14), a secondary separation outer tube (15), and a separation float (18). One end of the secondary separation outer tube (15) is fixedly installed with the outflow end of the primary separation inner tube (9) and the two are communicated. The other end of the secondary separation outer tube (15) is fixedly installed with the main exhaust pipe (5) and the two are communicated. The secondary separation inner tube (14) is inserted into the interior of the secondary separation outer tube (15) and the two are fixedly connected. A secondary liquid reflux cavity is formed between the secondary separation inner tube (14) and the secondary separation outer tube (15). The secondary liquid reflux cavity is communicated with the internal cavity of the secondary separation inner tube (14). The secondary separation inner tube (14) is communicated with the main exhaust pipe (5). The separation float (18) is installed inside the secondary separation inner tube (14). The secondary cyclone (16) is installed inside the secondary separation inner tube (14). One end of the bypass separation component (4) is connected to the main exhaust pipe (5), and the other end of the bypass separation component (4) is connected to the liquid storage tank (7). A connecting pipe (8) is installed in the middle of the bypass separation component (4), and the end of the connecting pipe (8) away from the bypass separation component (4) is connected to the middle of the secondary separation outer pipe (15).

2. The tubular slug flow capture and separation device according to claim 1, characterized in that: The bypass separation component (4) includes a bypass separation inner tube (20) and a bypass separation outer tube (21), the middle portion of the bypass separation inner tube (20) passes through the top wall of the bypass separation outer tube (21) and the two are fixedly connected, and the lower portion of the bypass separation inner tube (20) extends into the middle portion of the bypass separation outer tube (21), and an annular cavity is formed between the lower portion of the bypass separation inner tube (20) and the inner side wall of the bypass separation outer tube (21); the connecting tube (8) is fixedly installed with the bypass separation outer tube (21), and the connecting tube (8) is connected to the annular cavity; the end of the bypass separation inner tube (20) away from the bypass separation outer tube (21) is fixedly installed with the main exhaust pipe (5), and the two are connected.

3. The tubular slug flow capture and separation device according to claim 2, characterized in that: The bypass separation component (4) further comprises a separation floating screen (22), the separation floating screen (22) being slidably mounted on the inner side wall of the bypass separation outer tube (21), and the overall density of the separation floating screen (22) being less than the density of water; the inflow end of the main drainage pipe (6) passes through a side wall of the liquid storage tank (7) and the two are fixedly mounted, the inflow end of the main drainage pipe (6) being in communication with the interior of the liquid storage tank (7), a valve plate (24) being hingedly connected to the inflow end port of the main drainage pipe (6), a traction rope (23) being tied to the separation floating screen (22), and one end of the traction rope (23) away from the separation floating screen (22) being tied to the valve plate (24); the separation floating screen (22) rises or falls with the liquid level, and the separation floating screen (22) drives the valve plate (24) to rotate partially through the traction rope (23), and the opening of the valve plate (24) on the main drainage pipe (6) becomes larger or smaller.

4. The tubular slug flow capture and separation device according to claim 1, characterized in that: The primary separation component (2) further comprises a primary cyclone (11), a plurality of separation holes (12) are provided on the circumferential side wall of the primary separation inner tube (9), and the primary cyclone (11) is rotatably mounted inside the primary separation inner tube (9).

5. The tubular slug flow capture and separation device according to claim 1, characterized in that: The secondary separation inner tube (14) is composed of a straight tube section and an extended tube section, the extended tube section is trumpet-shaped, and a plurality of separation narrow slits (19) arranged along the circumference are opened on the side wall of the extended tube section. The separation float (18) is fixedly installed on the extended tube section, and the secondary cyclone (16) is rotatably installed in the straight tube section of the secondary separation inner tube (14).

6. The tubular slug flow capture and separation device according to claim 5, characterized in that: A limiting orifice plate (17) is fixedly installed on the inner side wall of the straight pipe section of the secondary separation inner tube (14); the separation float (18) is a cylindrical structure, the diameter of the cylinder is 0.85-0.95 times the diameter of the secondary separation inner tube (14), the cylinder is filled with metal foam (26), and a vent hole (27) is provided on the outlet wall of the cylinder.

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