Gas-liquid separator

Abstract

The present invention discloses a gas-liquid separator, comprising a shell, a flow separator, and a partition plate. The shell is provided with a feed pipe, an exhaust pipe, and a discharge pipe. The flow separator is disposed within the shell and comprises a feed section, a first separation section, a second separation section, and a discharge section arranged in sequence along the axial direction, wherein the feed section is connected between the feed pipe and the first separation section. The first separation section comprises a plurality of spiral arm channels spaced apart along the circumferential direction and connected to the shell, and the plurality of spiral arm channels are tangentially connected to the flow separator. The second separation section comprises a plurality of flow guide channels spaced apart along the circumferential direction and extending axially and connected to the shell and the first separation section, and the plurality of flow guide channels are tangentially connected to the flow separator, and so on. The gas-liquid separator of the present invention, by orderly combining a feed pipe and a flow separator with multiple separation functions, has the advantages of being light and simple in structure, having a wide applicability of separation medium materials, and being capable of long-term stable operation. It can also effectively avoid problems such as blowby and back mixing at the discharge port.

Description

Technical Field

[0001] The present invention relates to the technical field of gas-liquid separation, in particular to a gas-liquid separator. Background Art

[0002] Multiphase flow separation, particularly gas-liquid two-phase flow separation, has long been a research focus in modern industries such as petroleum, chemical engineering, and nuclear engineering. Traditional gas-liquid separation equipment can be broadly categorized by separation principle, including gravity separators, baffle separators, and cyclone separators. While conventional separators utilizing a single separation principle have the advantage of simple structure, they also have certain limitations in their application. Therefore, in the development of gas-liquid separators, it is often necessary to couple structures with different separation mechanisms to achieve better separation performance.

[0003] Currently, the most widely used separator is the cyclone. Its operating principle is as follows: a gas-liquid mixture is typically introduced into the separator cylinder through a tangential inlet, where a swirling flow forms. Under the influence of gravity and centrifugal force, the liquid phase is thrown to the side walls and flows downward, while the gas phase concentrates in the center and is discharged from the top. However, the asymmetric single-sided tangential inlet structure causes the airflow to oscillate within the separation zone, exacerbating droplet breakup and resulting in poor separation performance for small droplet groups. Summary of the Invention

[0004] The object of the present invention is to provide a gas-liquid separator, which at least solves the problem that the existing separators cannot adapt to various working conditions.

[0005] The above-mentioned purpose of the present invention can be achieved by adopting the following technical solutions:

[0006] The present invention provides a gas-liquid separator, comprising: an outer shell extending in the axial direction, on which a feed pipe, an exhaust pipe and a liquid discharge pipe are provided; a flow partitioning tube extending in the axial direction, which is arranged in the outer shell, and the flow partitioning tube has a feed section, a first separation section, a second separation section and a discharge section arranged in sequence along the axial direction, and the feed section is connected between the feed pipe and the first separation section; the first separation section includes a plurality of spiral arm channels spaced apart in the circumferential direction, and the flow partitioning tube is connected to the outer shell through the plurality of spiral arm channels in the first separation section, and the plurality of spiral arm channels are tangentially connected to the flow partitioning tube, the second separation section includes a plurality of guide channels spaced apart in the circumferential direction and extending in the axial direction, and the flow partitioning tube is connected to the outer shell through the plurality of guide channels in the second separation section. The plurality of flow guide channels are tangentially connected with the flow partitioning tube, and the first separation section is connected with the second separation section through the plurality of spiral arm channels and the plurality of flow guide channels; in the direction from the flow partitioning tube to the outer shell, the plurality of spiral arm channels are rotationally extended in a clockwise direction or a counterclockwise direction and are tilted along the direction of gravity, and the tangential rotation direction of the plurality of flow guide channels is the same as the rotation direction of the plurality of spiral arm channels; a partition plate cover is provided at the upper end of the feed section and is connected to the inner wall of the outer shell, the partition plate divides the interior of the outer shell into a gas collection area and a separation area, and a lifting air pipe for connecting the gas collection area and the separation area is connected to the partition plate, one end of the lifting air pipe is inserted into the flow partitioning tube and extends axially to between the first separation section and the second separation section.

[0007] Preferably, the feed pipe is arranged perpendicular to the axis of the shell.

[0008] Preferably, the outer shell, the flow separator and the lifting air pipe are coaxially arranged.

[0009] Preferably, the angle between the inclined direction of the spiral arm channel and the horizontal direction is 10° to 30°, and the flow cross-section of the spiral arm channel is 0.4 to 0.65 times the cross-section of the inner cavity of the shell.

[0010] Preferably, the flow cross-section of the flow guide channel is 0.3 to 0.45 times the cross-section of the inner cavity of the shell, and the extended length of the flow guide channel is 15 to 17 times the flow width thereof.

[0011] Preferably, the inner diameter of the feed pipe is 0.45 to 0.6 times the inner cross-section of the shell, the inner diameter of the flow separator is 0.7 to 0.75 times the inner cross-section of the shell, and the inner diameter of the lifting air pipe is 0.25 to 0.4 times the inner cross-section of the shell.

[0012] Furthermore, the feed pipe is tangentially connected to the feed section.

[0013] Preferably, the feed pipe has a rectangular cross-section along its extension direction, the length direction of the rectangular cross-section is the same as the gravity direction, the aspect ratio of the rectangular cross-section is 1.8 to 2.5, and the flow cross-section of the feed pipe is 0.2 to 0.4 times the inner cavity cross-section of the shell.

[0014] Furthermore, the other end of the lifting air pipe extends axially to form an extension section extending into the air collecting area, and a bubble is connected to the extension section. Along the direction of gravity, an airflow reversing area is formed between the bubble and the lifting air pipe; along the radial direction, an airflow dispersion area is formed between the bubble and the lifting air pipe.

[0015] Preferably, a downcomer is connected to the partition plate, the downcomer is connected to the gas collecting area and the liquid discharge pipe, and the length of the pipe section of the downcomer extending from the partition plate is shorter than the length of the extension section.

[0016] The characteristics and advantages of the present invention are as follows: the gas-liquid separator provided by the present invention includes an outer shell, a partition plate arranged in the outer shell, a flow partition cylinder connected to the bottom of the partition plate, and a lifting air pipe connected to the partition plate and inserted into the flow partition cylinder, wherein the flow partition cylinder has a feed section arranged in sequence along the axial direction, a first separation section including a plurality of spiral arm channels, a second separation section including a plurality of guide channels, and a discharge section, and a feed pipe extending horizontally and connected to the feed section is provided on the outer shell, so that after the gas-liquid two-phase mixture enters the separator through the feed pipe, its flow direction will be changed from horizontal to vertical at the end of the feed pipe, and will flow downward to the first separation section under the obstruction of the partition plate; and through the spiral arm channel of the first separation section, The gas-liquid two-phase mixture entering therein is subjected to the strong cyclonic action, thereby achieving preliminary separation of gas and liquid, eliminating the vortex core swing phenomenon that is detrimental to gas-liquid separation, and enhancing the separation performance, effectively reducing the pressure drop; at the same time, the first separation section is connected to the second separation section through multiple spiral arm channels and multiple guide channels, and the tangential rotation direction of the multiple guide channels in the direction from the flow partition tube to the outer shell is the same as the rotation direction of the multiple spiral arm channels, so that the gas phase reaching the second separation section reverses its rotation direction when entering the flow partition tube from the outer wall of the flow partition tube through the guide channel, thereby achieving enhanced separation of gas and liquid; and a partition plate is provided to completely separate the gas collection area and the separation area, eliminating short-circuit flow and other phenomena that may be detrimental to separation, so that the gas-liquid separation can be carried out stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1This is a schematic structural diagram of the gas-liquid separator provided in an embodiment of the present invention when the feed pipe is horizontally arranged;

[0019] Figure 2 for Figure 1 AA section view;

[0020] Figure 3 for Figure 1 BB section view;

[0021] Figure 4 for Figure 1 CC section view;

[0022] Figure 5 This is a schematic diagram of a state in which the airflow in the gas-liquid separator provided in an embodiment of the present invention passes through the second separation section of the flow separator;

[0023] Figure 6 This is a schematic structural diagram of the gas-liquid separator provided in an embodiment of the present invention, in a state where the feed pipe and the flow separator are horizontally and tangentially connected;

[0024] Figure 7 for Figure 6 DD section view;

[0025] Figure 8 This is a schematic structural diagram of the gas-liquid separator provided in an embodiment of the present invention, in a state where the feed pipe is horizontally and tangentially connected to the flow separator and a bubble cap and a downcomer are provided;

[0026] Figure 9 for Figure 8 EE cross-sectional view.

[0027] Description of Figure Numbers:

[0028] 1. Shell; 11. Feed pipe; 12. Exhaust pipe; 13. Drain pipe;

[0029] 2. Flow separator; 21. Feeding section; 22. First separation section; 220. Rotary arm channel; 23. Second separation section; 230. Diversion channel; 24. Discharging section;

[0030] 3. Separator;

[0031] 4. Lift the trachea;

[0032] 5. Inner partition;

[0033] 6. Blister;

[0034] 7. Support ribs;

[0035] 8. Downcomer. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] like Figures 1 to 5 As shown, the present invention provides a gas-liquid separator, comprising an axially extending shell 1, an axially extending flow partition tube 2 and a partition plate 3. The shell 1 is provided with a feed pipe 11, an exhaust pipe 12 and a liquid discharge pipe 13; the flow partition tube 2 is arranged in the shell 1, and the flow partition tube 2 has a feed section 21, a first separation section 22, a second separation section 23 and a discharge section 24 arranged in sequence along the axial direction, and the feed section 21 is connected between the feed pipe 11 and the first separation section 22; the first separation section 22 includes a plurality of spiral arm channels 220 spaced apart along the circumferential direction, the flow partition tube 2 is connected to the shell 1 through the plurality of spiral arm channels 220 in the first separation section 22, and the plurality of spiral arm channels 220 are tangentially connected to the flow partition tube 2, the second separation section 23 includes a plurality of guide channels 230 spaced apart along the circumferential direction and extending along the axial direction, the flow partition tube 2 is connected to the shell 1 through the plurality of guide channels 230 in the second separation section 23, and the plurality of guide channels 230 are tangentially connected to the flow partition tube 2 The first separation section 22 is connected with the second separation section 23 through multiple spiral arm channels 220 and multiple guide channels 230; the flow cross-section of the discharge section 24 is reduced in the direction of gravity to facilitate the liquid phase to flow out of the flow separator 2; from the flow separator 2 to the outer shell 1, multiple spiral arm channels 220 are extended in a clockwise or counterclockwise direction and are inclined in the direction of gravity, and the tangential rotation direction of the multiple guide channels 230 is the same as the rotation direction of the multiple spiral arm channels 220; the partition plate 3 is covered on the upper end of the feed section 21 and connected to the inner wall of the outer shell 1, the partition plate 3 divides the interior of the outer shell 1 into a gas collection area and a separation area, and the partition plate 3 is connected to a lifting air pipe 4 for connecting the gas collection area and the separation area, one end of the lifting air pipe 4 is inserted into the flow separator 2 and extends axially to between the first separation section 22 and the second separation section 23.

[0038] Specifically, such as Figure 1As shown, the gas-liquid separator includes a shell 1, a partition plate 3 disposed in the shell 1, a flow separator 2 connected to the bottom of the partition plate 3, and a lifting pipe 4 connected to the partition plate 3 and inserted into the flow separator 2. The partition plate 3 divides the interior of the shell 1 into a gas collection area located above the partition plate 3 and a separation area located below the partition plate 3. By completely separating the gas collection area and the separation area, short-circuit flow and other phenomena that may be detrimental to the separation are eliminated, so that the gas-liquid separation is kept stable. Preferably, along the axial direction, an exhaust pipe 12 is provided at the top end of the shell 1, and a liquid discharge pipe 13 is provided at the bottom end of the shell 1. The feed pipe 11 is horizontally provided on the side wall of the shell 1 and extends radially inward to communicate with the flow separator 2. That is, the feed pipe 11 is provided perpendicular to the axis of the shell 1, so that after the gas-liquid two-phase mixture enters the separator through the feed pipe 11, its flow direction will change from horizontal to vertical at the end of the feed pipe 11 and enter the annular space formed between the flow separator 2 and the lifting pipe 4. Due to the obstruction of the partition plate 3, a high-pressure zone forms above the feed section 21. Since fluids always flow from high-pressure zones to low-pressure zones, the gas-liquid mixture within the feed section 21 can only flow downward within this annular space. An internal partition plate 5 is provided within the flow divider 2 to block axial communication between the first separation section 22 and the second separation section 23. When the gas-liquid mixture reaches the first separation section 22, it enters the spiral channel 220 tangentially. Influenced by the density difference between the gas and liquid phases, the strong cyclonic flow within the spiral channel 220 causes the denser liquid phase to be flung toward the inner wall of the housing 1 due to the greater centrifugal force. The gas phase, however, is subjected to a smaller centrifugal force and distributed near the outer wall of the flow divider 2, forming a cyclonic distribution of "liquid outside, gas inside," thus achieving initial gas-liquid separation. The gas-liquid mixture maintains this cyclonic distribution and flows downward to the second separation section 23. When the gas and liquid phases reach the second separation section 23, the airflow near the outer wall of the flow separator 2 is affected by the low-pressure area of ​​the internal lifting pipe 4 and enters the interior of the flow separator 2 through the guide channel 230. In the direction from the flow separator 2 to the outer shell 1, the tangential rotation direction of the multiple guide channels 230 is the same as the rotation direction of the multiple spiral arm channels 220, so that the gas phase that reaches the second separation section 23 reverses its rotation direction when entering the flow separator 2 from the outer wall of the flow separator 2 through the guide channel 230 and turns with a very small turning radius. At this time, the small droplets entrained in the gas phase will generate a greater inertial force during the turning process and be thrown to the outside of the flow separator 2. The gas phase is affected by the lifting pipe 4 and enters the interior of the flow separator 2, realizing enhanced gas-liquid separation. The process of the airflow entering the guide channel 230 is shown in the figure below. Figure 5As shown in the figure, the arrows indicate the direction of airflow. The gas phase entering the flow separator 2 is then collected by the lift pipe 4 and lifted to the gas collection area, and finally discharged from the exhaust pipe 12. The liquid phase that is thrown to the outside of the flow separator 2 during the initial gas-liquid separation and gas-liquid enhanced separation process flows downward along the inner wall of the shell 1 due to gravity and is discharged from the drain pipe 13. The liquid phase that enters the flow separator 2 with the gas phase during the gas-liquid enhanced separation process and adheres to the inner wall of the flow separator 2 flows downward due to gravity through the discharge section 24 and into the drain pipe 13 for discharge.

[0039] Preferably, Figure 1 As shown, the outer shell 1, the flow separator 2 and the lifting air pipe 4 are coaxially arranged to stabilize the internal airflow, providing a relatively uniform and symmetrically distributed airflow state for the centrifugal separation of the first separation section 22 and the inertial separation of the second separation section 23, which is conducive to the long-term stable operation of the separation.

[0040] The gas-liquid separator provided by the present invention includes an outer shell 1, a partition plate 3 arranged in the outer shell 1, a flow partition tube 2 connected to the bottom of the partition plate 3, and a lifting gas pipe 4 connected to the partition plate 3 and inserted into the flow partition tube 2, wherein the flow partition tube 2 has a feed section 21, a first separation section 22 including a plurality of spiral arm channels 220, a second separation section 23 including a plurality of guide channels 230, and a discharge section 24 arranged in sequence along the axial direction, and a feed pipe 11 extending horizontally and connected to the feed section 21 is provided on the outer shell 1, so that after the gas-liquid two-phase mixture enters the separator through the feed pipe 11, its flow direction will change from horizontal to vertical at the end of the feed pipe 11, and flow downward to the first separation section 22 under the obstruction of the partition plate 3; and pass through the spiral arm channel 220 of the first separation section 22. The gas-liquid two-phase mixture entering therein is subjected to a strong cyclonic effect, thereby achieving preliminary separation of gas and liquid, eliminating the vortex core swing phenomenon that is detrimental to gas-liquid separation, and enhancing the separation performance, effectively reducing the pressure drop; at the same time, the first separation section 22 is connected to the second separation section 23 through multiple spiral arm channels 220 and multiple guide channels 230, and the tangential rotation direction of the multiple guide channels 230 in the direction from the flow separator 2 to the outer shell 1 is the same as the rotation direction of the multiple spiral arm channels 220, so that the gas phase reaching the second separation section 23 is reversed when entering the flow separator 2 from the outer wall of the flow separator 2 through the guide channel 230, thereby achieving enhanced separation of gas and liquid; and a partition plate 3 is provided to completely separate the gas collection area and the separation area, eliminating short-circuit flow and other phenomena that may be detrimental to separation, so that the gas-liquid separation can be carried out stably.

[0041] Among them, such as Figure 5As shown, the wall of the flow separator 2 at the second separation section 23 is circumferentially spaced with narrow tangential slots, known as flow channels 230. This arrangement dramatically changes the direction of the flowing gas as it passes through these channels. Due to the different densities of the gas and liquid phases, most liquid droplets entrained within the gas flow are separated from the rotating airflow. Inertial forces prevent the droplets from passing through these channels and into the internal lift pipe 4, thereby ensuring enhanced gas-liquid separation. In this embodiment, the flow channels 230 are evenly distributed along the circumference, with a number of 6 to 10.

[0042] According to a preferred embodiment of the present invention, the angle between the inclination direction of the spiral arm channel 220 and the horizontal direction is 10° to 30°, and the flow cross-section of the spiral arm channel 220 is 0.4 to 0.65 times the cross-section of the inner cavity of the shell 1. By setting the inclination angle of the spiral arm channel 220 in a suitable range of 10° to 30°, the airflow swirl enters the second separation section 23 to achieve enhanced separation of gas and liquid. By setting the flow cross-section of the spiral arm channel 220 to 0.4 to 0.65 times the cross-section of the inner cavity of the shell 1, it is ensured that a strong centrifugal force can still be generated without the need for external power, thereby ensuring the initial separation effect of gas and liquid. In this embodiment, the spiral arm channels 220 are evenly distributed along the circumferential direction, and their number is 3 to 5.

[0043] According to a preferred embodiment of the present invention, the flow cross-section of the flow channel 230 is 0.3 to 0.45 times the cross-section of the inner cavity of the housing 1, and the extended length of the flow channel 230 is 15 to 17 times its flow width. This achieves both enhanced gas-liquid separation effect and speed.

[0044] According to a preferred embodiment of the present invention, the inner diameter of the feed pipe 11 is 0.45 to 0.6 times the cross-sectional area of ​​the inner cavity of the housing 1, the inner diameter of the flow separator 2 is 0.7 to 0.75 times the cross-sectional area of ​​the inner cavity of the housing 1, and the inner diameter of the riser pipe 4 is 0.25 to 0.4 times the cross-sectional area of ​​the inner cavity of the housing 1. By adapting the inner diameters of the feed pipe 11, flow separator 2, and riser pipe 4 to the cross-sectional area of ​​the inner cavity of the housing 1, the separation efficiency of the separator is guaranteed. In this embodiment, the cross-sectional area of ​​the inner cavity of the housing 1 (maximum cross-sectional area along the axial direction) is set to 2 to 6 meters.

[0045] According to one embodiment of the present invention, Figure 6 and Figure 7As shown, the feed pipe 11 is tangentially connected to the feed section 21. This tangential connection allows the gas-liquid two-phase mixture at the end of the feed pipe 11 to be subjected to centrifugal force, forming a "liquid outside, gas inside" distribution. This distribution is maintained as the mixture rotates downward within the annular space formed between the flow separator 2 and the riser pipe 4, achieving gas-liquid pre-separation. By adding gas-liquid pre-separation before the initial gas-liquid separation and enhanced gas-liquid separation, a cleaner airflow is achieved.

[0046] Preferably, in order to strengthen the swirl of the gas-liquid mixture and subject the gas-liquid mixture entering the spiral arm channel 220 to a stronger centrifugal force, the rotation direction of the feed pipe 11 is consistent with that of the spiral arm channel 220. When the swirl of "external liquid and internal gas" enters the spiral arm channel 220, it is further affected by the centrifugal force, and the aggregation effect of the liquid phase in the spiral arm channel 220 is strengthened, thereby improving the separation efficiency. At the same time, the swirl effect is strengthened twice by the feed pipe 11 and the spiral arm channel 220, and the swirl of the airflow is further strengthened. The turning radius of the sharp turn when the airflow enters the guide channel 230 is reduced, thereby increasing the difference in inertial force exerted on the gas and liquid phases during the turn, further improving the overall gas-liquid separation performance.

[0047] According to a preferred embodiment of the present invention, the feed pipe 11 has a rectangular cross-section along its extension direction, the length direction of the rectangular cross-section is aligned with the direction of gravity, the aspect ratio of the rectangular cross-section is 1.8 to 2.5, and the flow cross-section of the feed pipe 11 is 0.2 to 0.4 times the cross-section of the inner cavity of the housing 1. This effectively prevents direct collision between the gas-liquid mixture at the end of the feed pipe 11 and the riser pipe 4, not only reducing the disorder caused by collision during the gas-liquid pre-separation process, but also increasing the service life of the riser pipe 4, ensuring long-term stable operation of the equipment.

[0048] According to one embodiment of the present invention, Figure 8 and Figure 9 As shown, the other end of the lifting air pipe 4 extends axially to form an extension section extending into the air collection area, and the extension section is connected to a bubble cap 6. Along the direction of gravity, an airflow reversing area is formed between the bubble cap 6 and the lifting air pipe 4; along the radial direction, an airflow dispersion area is formed between the bubble cap 6 and the lifting air pipe 4.

[0049] Specifically, such as Figure 8 and Figure 9As shown, the bubble cap 6 is in the shape of a hollow hemispherical shell, its distal end connected to the lift pipe 4 via a plurality of circumferentially evenly distributed support ribs 7, thereby securing the bubble cap 6 to the lift pipe 4. The cross-sectional area of ​​the bottom end of the bubble cap 6 is larger than the outer diameter of the lift pipe 4, allowing the bubble cap 6 to capture tiny droplets entrained in the airflow. These captured droplets adhere to the inner wall of the bubble cap 6 and flow under the action of gravity along the inner wall of the bubble cap 6 to the partition plate 3, forming a liquid accumulation area. As the separation process proceeds, the airflow that has been initially separated by the swirl channel 220 and enhanced by the guide channel 230 moves upward through the lift pipe 4 to contact the inner wall of the bubble cap 6, wherein the entrained liquid droplets are captured by the bubble cap 6. Subsequently, the airflow is reversed in the airflow reversing area formed between the lift pipe 4 and the bubble cap 6, and dispersed out of the bubble cap 6 from the airflow dispersion area formed between the bubble cap 6 and the lift pipe 4. In this process, the liquid droplets entrained by the airflow and not captured by the bubble cap 6 are further captured by the liquid accumulation area, thereby achieving fine gas-liquid separation. The pure gas phase after separation is collected and discharged at the exhaust pipe 12 at the top of the shell 1. The liquid phase in the liquid accumulation area can be drawn out by opening an outlet at an appropriate position of the shell 1. Fine gas-liquid separation is added on the basis of the three-step separation of gas-liquid pre-separation, gas-liquid initial separation and gas-liquid enhanced separation to further separate the tiny liquid droplets entrained in the airflow and improve the overall separation performance of the gas-liquid separator.

[0050] According to a preferred embodiment of the present invention, a downcomer 8 is connected to the partition plate 3, the downcomer 8 is connected to the gas collecting area and the liquid discharge pipe 13, and the length of the downcomer 8 extending from the partition plate 3 is less than the length of the extension section. Figure 8 and Figure 9 As shown, the downcomer 8 is distributed on the side wall of the separator and is designed as a cylindrical shape with a smaller tube diameter to reduce its impact on the separation process of the spiral arm channel 220 and the guide channel 230. The length of the pipe section of the downcomer 8 extending from the partition plate 3 is less than the length of the extension section of the lift pipe 4. This ensures that the level of the accumulated liquid above the partition plate 3 is always lower than the lift pipe 4, thereby preventing the accumulated liquid from flowing back into the lift pipe 4. As the number of captured droplets increases, the level of the accumulated liquid above the partition plate 3 continues to rise. When the level of the accumulated liquid reaches the length of the pipe section of the downcomer 8 extending from the partition plate 3, the captured liquid flow will pass through the downcomer 8 to the drain pipe 13, where it will converge with the liquid phase separated by the spiral arm channel 220 and the guide channel 230 at the bottom of the shell 1 and then be discharged from the drain pipe 13. In this embodiment, the maximum inner diameter of the bubble cap 6 is 0.3 to 0.45 times the inner cross section of the shell 1 , and the inner diameter of the downcomer 8 is 0.025 to 0.05 times the inner cross section of the shell 1 .

[0051] Preferably, the bottom end of the bubble cap 6 is set lower than the length of the pipe section of the downcomer 8 extending from the partition plate 3 to ensure that the airflow transmitted by the lifting air pipe 4 is completely captured by the bubble cap 6 and the liquid accumulation area, thereby enhancing the fine gas-liquid separation effect. It should be noted that the gas separated by the bubble cap 6 may have a certain wetting effect when it reaches the airflow dispersion area. However, the airflow transmitted by the lifting air pipe 4 to the bubble cap 6 carries a liquid phase in the form of droplets, which will be completely captured by the bubble cap 6 and the liquid accumulation area formed below. Therefore, the liquid accumulation area's capture effect on the droplets is greater than its wetting effect on the gas, and will not significantly affect the final separation effect.

[0052] Based on the above structural description, the gas-liquid separator provided by the present invention has the following beneficial effects:

[0053] The gas-liquid separator provided by the present invention comprises a shell 1, a partition plate 3 arranged in the shell 1, a flow separator 2 connected to the bottom of the partition plate 3, and a lifting gas pipe 4 connected to the partition plate 3 and inserted into the flow separator 2, wherein the flow separator 2 has a feed section 21 arranged in sequence along the axial direction, a first separation section 22 including a plurality of spiral arm channels 220, a second separation section 23 including a plurality of guide channels 230, and a discharge section 24. A feed pipe 11 extending horizontally and connected to the feed section 21 is provided on the shell 1, so that the gas-liquid two-phase mixture passes through the feed section 21. After the tube 11 enters the separator, its flow direction will change from horizontal to vertical at the end of the feed tube 11, and will flow downward to the first separation section 22 under the obstruction of the partition plate 3; and the gas-liquid two-phase mixture entering therein will be subjected to strong cyclonic action through the spiral arm channel 220 of the first separation section 22, thereby achieving preliminary separation of gas and liquid, eliminating the vortex core swing phenomenon that is detrimental to gas-liquid separation, and enhancing the separation performance, effectively reducing the pressure drop; at the same time, the first separation section 22 and the second separation section 2 are separated by multiple spiral arm channels 220 and multiple guide channels 230. 3 are connected, and the tangential rotation direction of the multiple guide channels 230 from the flow partition tube 2 to the shell 1 is the same as the rotation direction of the multiple spiral arm channels 220, so that the gas phase reaching the second separation section 23 is reversed when entering the flow partition tube 2 from the outer wall of the flow partition tube 2 through the guide channel 230, thereby realizing enhanced gas-liquid separation; in addition, the partition plate 3 is provided to completely separate the gas collection area and the separation area, eliminating short-circuit flow and other phenomena that may be detrimental to the separation, so that the gas-liquid separation is kept stable; further, by providing a feed pipe tangentially connected to the feed section 21 11, so that the separator has a front-end gas-liquid pre-separation function, and by being arranged at the outlet end of the lifting air pipe 4, the separator has a rear-end gas-liquid fine separation function. By combining and setting simple internal components, the gas-liquid separator has a quadruple separation function. The gas-liquid separator provided by the present invention has the advantages of light and simple equipment structure, wide applicability of separation medium materials, and long-term stable operation by orderly combining the feed pipe 11 and the flow partition cylinder 2 with multiple separation functions, and can effectively avoid problems such as uneven air distribution and gas backmixing at the discharge port.

[0054] The above descriptions are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A gas-liquid separator, characterized in that: include: A housing extending in the axial direction, wherein a feed pipe, an exhaust pipe and a liquid discharge pipe are provided on the housing; A flow separator extending axially is disposed within the outer shell. The flow separator comprises a feed section, a first separation section, a second separation section, and a discharge section, arranged in sequence along the axial direction. The feed section communicates between the feed pipe and the first separation section. The first separation section comprises a plurality of spiral arm channels spaced circumferentially. The flow separator communicates with the outer shell via the plurality of spiral arm channels in the first separation section, and the plurality of spiral arm channels are tangentially connected to the flow separator. The second separation section comprises a plurality of flow guide channels spaced circumferentially and extending axially. The flow separator communicates with the outer shell via the plurality of flow guide channels in the second separation section, and the plurality of flow guide channels are tangentially connected to the flow separator. The first separation section communicates with the second separation section via the plurality of spiral arm channels and the plurality of flow guide channels. The plurality of spiral arm channels extend clockwise or counterclockwise from the flow separator to the outer shell and are inclined in the direction of gravity. The tangential rotation direction of the plurality of flow guide channels is the same as the rotation direction of the plurality of spiral arm channels. A partition plate cover is provided at the upper end of the feed section and is connected to the inner wall of the shell. The partition plate divides the interior of the shell into a gas collection area and a separation area. A lifting gas pipe for connecting the gas collection area and the separation area is connected to the partition plate. One end of the lifting gas pipe is inserted into the flow separator and extends axially between the first separation section and the second separation section. The other end of the lifting air pipe extends axially to form an extension section extending into the air collecting area, and a bubble is connected to the extension section. Along the direction of gravity, an airflow reversing area is formed between the bubble and the lifting air pipe; along the radial direction, an airflow dispersion area is formed between the bubble and the lifting air pipe.

2. The gas-liquid separator according to claim 1, characterized in that: The feed pipe is arranged perpendicular to the axis of the shell.

3. The gas-liquid separator according to claim 1, characterized in that: The outer shell, the flow separator and the lifting air pipe are coaxially arranged.

4. The gas-liquid separator according to claim 3, characterized in that: The angle between the inclined direction of the spiral arm channel and the horizontal direction is 10° to 30°, and the flow cross section of the spiral arm channel is 0.4 to 0.65 times the cross section of the inner cavity of the shell.

5. The gas-liquid separator according to claim 1 or 4, characterized in that: The flow cross section of the flow guide channel is 0.3 to 0.45 times the cross section of the inner cavity of the shell, and the extended length of the flow guide channel is 15 to 17 times the flow width thereof.

6. The gas-liquid separator according to claim 1, characterized in that: The inner diameter of the feed pipe is 0.45 to 0.6 times the inner cross-section of the shell, the inner diameter of the flow separator is 0.7 to 0.75 times the inner cross-section of the shell, and the inner diameter of the lifting air pipe is 0.25 to 0.4 times the inner cross-section of the shell.

7. The gas-liquid separator according to claim 1, characterized in that: The feed pipe is tangentially connected to the feed section.

8. The gas-liquid separator according to claim 7, characterized in that: The feed pipe has a rectangular cross-section along its extension direction, the length direction of the rectangular cross-section is the same as the gravity direction, the aspect ratio of the rectangular cross-section is 1.8-2.5, and the flow cross-section of the feed pipe is 0.2-0.4 times the inner cavity cross-section of the shell.

9. The gas-liquid separator according to claim 1 or 7, characterized in that: A downcomer is connected to the partition plate, the downcomer is connected to the gas collecting area and the liquid discharge pipe, and the length of the pipe section of the downcomer extending from the partition plate is shorter than the length of the extension section.

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