Gas-liquid separator

Abstract

The gas-liquid separator comprises a shell, a flow separation cylinder and a partition plate, and a feeding pipe, an exhaust pipe and a liquid drainage pipe are arranged on the shell; the flow separation barrel is arranged in the shell and is provided with a feeding section, a first separation section, a second separation section and a discharging section which are sequentially arranged in the axial direction, and the feeding section is communicated between the feeding pipe and the first separation section; the first separation section comprises a plurality of spiral arm channels which are distributed at intervals in the circumferential direction and communicate with the shell, the multiple spiral arm channels communicate with the flow separation barrel in the tangential direction, and the second separation section comprises a plurality of flow guide channels which are distributed at intervals in the circumferential direction, extend in the axial direction and communicate with the shell and the first separation section; and the plurality of flow guide channels are tangentially communicated with the flow separation cylinder. According to the gas-liquid separator, the feeding pipe and the flow separation barrel with multiple separation functions are sequentially combined, the gas-liquid separator has the advantages of being light and simple in equipment structure, wide in medium material separation applicability and capable of stably running for a long time, and the problems of blow-by and backmixing of a discharging opening and the like can be effectively solved.

Description

Technical Field

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

[0002] Multiphase flow separation has always been a research focus in modern industrial fields such as petroleum, chemical engineering and nuclear engineering, especially gas-liquid two-phase flow separation technology. Traditional gas-liquid separation equipment can be roughly divided into gravity separators, baffle separators and cyclone separators according to the separation principle. Conventional separators using a single separation principle have the advantage of simple structure, but have certain limitations in application. Therefore, in the development process of gas-liquid separators, it is often necessary to couple structures with different separation mechanisms to achieve better separation performance.

[0003] At present, the most widely used is the cyclone separator, whose working principle is: the gas-liquid mixture is usually introduced into the separator cylinder through the tangential inlet, forming a vortex in the cylinder, and under the action of gravity and centrifugal force, the liquid phase is thrown to the side wall and flows downward, while the gas phase is concentrated in the center and discharged from the top. However, the asymmetric single-sided tangential inlet structure will cause the airflow to sway the vortex core in the separation zone, aggravating the droplet breakage, resulting in a very unsatisfactory separation effect for small-size droplet groups. Summary of the invention

[0004] The purpose 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 discharge pipe are arranged; a flow separator tube extending in the axial direction, which is arranged in the outer shell, and the flow separator tube has a feed section, a first separation section, a second separation section and a discharge section which are sequentially arranged in the axial direction, and 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 in the circumferential direction, and the flow separator 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 separator tube, and the second separation section comprises a plurality of flow guide channels spaced apart in the circumferential direction and extending in the axial direction, and the flow separator tube is connected to the outer shell through the plurality of flow guide channels in the second separation section The first separation section is connected, and a plurality of the guide channels are tangentially connected with the flow partition tube, and the first separation section is connected with the second separation section through a plurality of the spiral arm channels and a plurality of the guide channels; in the direction from the flow partition tube to the outer shell, a plurality of the spiral arm channels are rotationally extended in a clockwise direction or a counterclockwise direction and are inclined along the gravity direction, and the tangential rotation direction of the plurality of the guide channels is the same as the rotation direction of the plurality of the spiral arm channels; a partition plate cover is arranged 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 partition 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 extension 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 outer shell, the inner diameter of the flow separator is 0.7 to 0.75 times the inner cross-section of the outer shell, and the inner diameter of the lift pipe is 0.25 to 0.4 times the inner cross-section of the outer 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 1.8-2.5, and the flow cross-section of the feed pipe is 0.2-0.4 times the inner cavity cross-section of the shell.

[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 comprises 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 gas 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 arranged 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 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 will be discharged. The gas-liquid two-phase mixture entering therein is subjected to the strong cyclone effect, thereby achieving preliminary separation of gas and liquid, which not only eliminates the vortex core swing phenomenon that is unfavorable to gas-liquid separation, but also enhances the separation performance and effectively reduces the pressure drop; at the same time, the first separation section is connected with 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 separator to the outer shell is the same as the rotation direction of the multiple spiral arm channels, so that the rotation direction of the gas phase reaching the second separation section is reversed when it enters the flow separator from the outer wall of the flow separator through the guide channel, thereby achieving enhanced separation of gas and liquid; and a partition plate is arranged to completely separate the gas collection area and the separation area, thereby eliminating short-circuit flow and other phenomena that may be unfavorable to separation, and ensuring that the gas-liquid separation is 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 1It is a schematic structural diagram of the gas-liquid separator provided in an embodiment of the present invention when the feed pipe is arranged horizontally;

[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 It is a schematic diagram of the state of the gas flow passing through the second separation section of the flow separator in the gas-liquid separator provided in an embodiment of the present invention;

[0023] Figure 6 It is a schematic structural diagram of the gas-liquid separator provided in an embodiment of the present invention when the feed pipe and the flow separator are in horizontal tangential communication;

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

[0025] Figure 8 It 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] Fig. 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. Swing arm channel; 23. Second separation section; 230. Flow guide channel; 24. Discharging section;

[0030] 3. Separator;

[0031] 4. Lift the air pipe;

[0032] 5. Inner partition;

[0033] 6. Blister;

[0034] 7. Support ribs;

[0035] 8. Downcomer. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work 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 separator 2 and a partition plate 3. The shell 1 is provided with a feed pipe 11, an exhaust pipe 12 and a discharge pipe 13; the flow separator 2 is arranged in the shell 1, and the flow separator 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 separator 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 separator 2, the second separation section 23 includes a plurality of flow guide channels 230 spaced apart along the circumferential direction and extending along the axial direction, the flow separator 2 is connected to the shell 1 through the plurality of flow guide channels 230 in the second separation section 23, and the plurality of flow guide channels 230 are tangentially connected to the flow separator 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, the 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, Figure 1As shown, the gas-liquid separator includes 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. The partition plate 3 divides the inside 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 arranged at the top of the shell 1, and a liquid discharge pipe 13 is arranged at the bottom of the shell 1. The feed pipe 11 is horizontally arranged 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 arranged 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 gas pipe 4. Blocked by the partition plate 3, a high-pressure area will be formed at the upper part of the feed section 21. According to the characteristic that the fluid always flows from the high-pressure area to the low-pressure area, the gas-liquid two-phase mixture in the feed section 21 can only flow downward in the annular space. An inner partition plate 5 is provided in the flow separator 2 for blocking the axial conduction between the first separation section 22 and the second separation section 23. When the gas-liquid two-phase mixture reaches the first separation section 22, it enters the spiral arm channel 220 tangentially. Affected by the density difference between the gas and liquid phases, the gas-liquid two-phase mixture entering the spiral arm channel 220 is subjected to the strong cyclone of the spiral arm channel 220. The liquid phase with a larger density is thrown to the inner wall of the shell 1 due to the greater centrifugal force, and the gas phase is subjected to a smaller centrifugal force and distributed near the outer wall of the flow separator 2, forming a cyclone distribution state of "liquid outside and gas inside", thereby achieving preliminary gas-liquid separation. The gas-liquid two-phase maintains the cyclone distribution state of "liquid outside and gas inside" and flows downward to the second separation section 23. When the gas-liquid two-phase reaches 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 gas 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 tangent 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 rotation direction of the gas phase that reaches the second separation section 23 is reversed when it enters 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 gas pipe 4 and enters the interior of the flow separator 2, realizing gas-liquid enhanced separation. The process of the gas flow entering the guide channel 230 is shown in the figure as follows Figure 5As shown, the arrow in the figure indicates the direction of airflow. The gas phase entering the flow separator 2 is then gathered by the lifting pipe 4 and lifted to the gas collection area, and finally discharged from the exhaust pipe 12. Among them, the liquid phase thrown to the outside of the flow separator 2 during the gas-liquid preliminary separation and gas-liquid enhanced separation flows downward along the inner wall of the shell 1 under the action of gravity and is discharged from the drain pipe 13. During the gas-liquid enhanced separation, the liquid phase that enters the flow separator 2 with the gas phase and adheres to the inner wall of the flow separator 2 flows downward through the discharge section 24 under the action of gravity and enters 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, provide a relatively uniform and symmetrical airflow state for the centrifugal separation of the first separation section 22 and the inertial separation of the second separation section 23, and are conducive to the long-term stable operation of the separation.

[0040] The gas-liquid separator provided by the present invention comprises 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 arranged 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 direction to vertical direction 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 cyclone to achieve preliminary separation of gas and liquid, which not only eliminates the vortex core swing phenomenon that is unfavorable to gas-liquid separation, but also enhances the separation performance and effectively reduces the pressure drop; at the same time, the first separation section 22 is connected to the second separation section 23 through a plurality of spiral arm channels 220 and a plurality of guide channels 230, and the tangential rotation direction of the plurality of guide channels 230 from the flow separator 2 to the outer shell 1 is the same as the rotation direction of the plurality of spiral arm channels 220, so that the rotation direction of 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, thereby eliminating short-circuit flow and other phenomena that may be unfavorable to separation, and ensuring that the gas-liquid separation is carried out stably.

[0041] Among them, Figure 5As shown, the wall of the flow separator 2 at the second separation section 23 is provided with narrow tangential opening grooves spaced apart in the circumferential direction, and the narrow tangential opening grooves are flow guide channels 230. Through the above arrangement, when the gas flows through the flow guide channels 230, the direction of the flowing gas will change sharply. Due to the different densities of the gas and liquid phases, most of the liquid droplets mixed therein will be separated from the rotating gas flow, and the inertial force prevents the liquid droplets from passing through the flow guide channels 230 to enter the internal lifting gas pipe 4, thereby ensuring the gas-liquid enhanced separation effect. In this embodiment, the flow guide channels 230 are evenly distributed in the circumferential direction, and the number thereof is 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°, it is convenient for the airflow swirl to enter 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 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 the number thereof is 3 to 5.

[0043] According to a preferred embodiment of the present invention, the flow cross section of the flow guide channel 230 is 0.3 to 0.45 times the inner cavity cross section of the housing 1, and the extension length of the flow guide channel 230 is 15 to 17 times its flow width, so as to take into account both the gas-liquid enhanced 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 inner cross section of the shell 1, the inner diameter of the flow separator 2 is 0.7 to 0.75 times the inner cross section of the shell 1, and the inner diameter of the lifting air pipe 4 is 0.25 to 0.4 times the inner cross section of the shell 1. The separation efficiency of the separator is ensured by adaptively designing the inner diameters of the feed pipe 11, the flow separator 2 and the lifting air pipe 4 to the inner cross section of the shell 1. In this embodiment, the inner cross section of the shell 1 (the maximum inner cross section along the axial direction) is set to 2m to 6m.

[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. By tangentially connecting the feed pipe 11 to the feed section 21, the gas-liquid two-phase mixture at the end of the feed pipe 11 is subjected to centrifugal force to form a distribution state of "liquid outside and gas inside", and this distribution state is maintained to rotate and flow downward in the annular space formed between the flow separator 2 and the lifting gas pipe 4, thereby realizing gas-liquid pre-separation. By adding gas-liquid pre-separation before gas-liquid preliminary separation and gas-liquid enhanced separation, a relatively clean airflow can be obtained.

[0046] Preferably, in order to strengthen the swirl of the gas-liquid mixed phase and make the gas-liquid mixed phase entering the spiral arm channel 220 be subjected to a stronger centrifugal force, the rotation direction of the feed pipe 11 is consistent with the rotation direction of the spiral arm channel 220. When the swirl of "external liquid and internal gas" enters the spiral arm channel 220, the liquid phase is further subjected to the centrifugal force. The aggregation effect in the spiral arm channel 220 is enhanced, and the separation efficiency is improved; at the same time, the swirl effect is strengthened twice by the feed pipe 11 and the spiral arm channel 220, and the swirl airflow is further strengthened. The turning radius of the sharp turn when the airflow enters the guide channel 230 is reduced, so that the difference in inertial force on the gas and liquid phases during the turn is increased, and the overall gas-liquid separation performance is further improved.

[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 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 11 is 0.2-0.4 times the inner cavity cross section of the shell 1. In this way, the direct collision between the gas-liquid mixed phase at the end of the feed pipe 11 and the lifting gas pipe 4 is effectively avoided, which not only reduces the disorder state caused by the collision during the gas-liquid pre-separation process, but also increases the service life of the lifting gas pipe 4, ensuring the long-term stable operation of the equipment.

[0048] According to one embodiment of the present invention, Figure 8 and Fig. 9 As shown, the other end of the lifting air pipe 4 extends axially to form an extension section extending into the air collecting 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, Figure 8 and Fig. 9As shown, the bubble cap 6 is in the shape of a hollow hemispherical shell, and its end is connected to the lifting air pipe 4 through a plurality of supporting ribs 7 evenly distributed along the circumference, so as to realize the fixed connection between the bubble cap 6 and the lifting air pipe 4. The cross-sectional area of ​​the bottom end of the bubble cap 6 is larger than the outer diameter of the lifting air pipe 4, so that the tiny droplets entrained in the air flow are captured by the bubble cap 6, and the captured tiny droplets attached to the inner wall of the bubble cap 6 flow along the inner wall of the bubble cap 6 to the partition plate 3 under the action of gravity and form a liquid accumulation area. As the separation process proceeds, the airflow that has been initially separated by the spiral arm channel 220 and enhanced by the guide channel 230 moves upward through the lifting air pipe 4 to contact the inner wall of the bubble cap 6, wherein the entrained droplets are captured by the bubble cap 6, and then the airflow is reversed in the airflow reversing area formed between the lifting air 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 lifting air pipe 4. In this process, the 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, and the separated pure gas phase 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 led 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 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 drain pipe 13, and the length of the downcomer 8 extending out of the partition plate 3 is less than the length of the extension section. Figure 8 and Fig. 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 diameter to reduce its influence on the separation process of the spiral arm channel 220 and the guide channel 230. Among them, 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 lifting gas pipe 4, so as to ensure that the liquid level of the accumulated liquid above the partition plate 3 is always lower than the lifting gas pipe 4, thereby preventing the accumulated liquid from flowing back into the lifting gas pipe 4. As the number of captured droplets increases, the liquid level of the accumulated liquid above the partition plate 3 continues to rise. When the liquid 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 reach the drain pipe 13 through the downcomer 8, and gather 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 out of the partition plate 3, so as 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 after reaching the airflow dispersion area, but 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 thereunder. Therefore, the capture effect of the liquid accumulation area on the droplets is greater than its wetting effect on the gas, and will not have much impact on 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 comprises a feed section 21, a first separation section 22 comprising a plurality of spiral arm channels 220, a second separation section 23 comprising a plurality of flow guide channels 230, and a discharge section 24, which are sequentially arranged along the axial direction. A feed pipe 11 extending horizontally and connected to the feed section 21 is arranged 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 changes from horizontal to vertical at the end of the feed tube 11, and flows downward to the first separation section 22 under the obstruction of the partition plate 3; the gas-liquid two-phase mixture entering therein is subjected to strong cyclone action through the spiral arm channel 220 of the first separation section 22, thereby achieving preliminary separation of gas and liquid, which not only eliminates the vortex core swing phenomenon that is unfavorable to gas-liquid separation, but also enhances the separation performance and effectively reduces 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 separator 2 to the shell 1 is the same as the rotation direction of the multiple spiral arm channels 220, so that the rotation direction of the gas phase reaching the second separation section 23 is reversed when it enters the flow separator 2 from the outer wall of the flow separator 2 through the guide channel 230, thereby realizing gas-liquid enhanced separation; in addition, the partition plate 3 is set to completely separate the gas collection area and the separation area, eliminating short-circuit flow and other phenomena that may be unfavorable to the separation, so that the gas-liquid separation is kept stable; further, by setting 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. Through the combination and arrangement of simple internal components, the gas-liquid separator has a quadruple separation function. The gas-liquid separator provided by the present invention combines the feed pipe 11 and the flow isolation cylinder 2 with multiple separation functions in an orderly manner, has the advantages of light and simple equipment structure, wide applicability of separation medium materials, and long-term stable operation, and can effectively avoid problems such as uneven air intake distribution and gas mixing at the discharge port.

[0054] The above 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 arranged on the housing; A flow separator extending in the axial direction is arranged in the shell, the flow separator has a feed section, a first separation section, a second separation section and a discharge section arranged in sequence in the axial direction, 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, the flow separator is connected to the 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 separator, the second separation section includes a plurality of flow guide channels spaced apart in the circumferential direction and extending in the axial direction, the flow separator is connected to the shell through 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 is connected to the second separation section through the plurality of spiral arm channels and the plurality of flow guide channels; from the flow separator to the shell, the plurality of spiral arm channels are rotationally extended in the clockwise direction or the counterclockwise direction and are tilted in 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 arranged 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. 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 separation tube and extends axially to between the first separation section and the second separation section.

2. The gas-liquid separator according to claim 1, characterized in that: The feed pipe is arranged perpendicularly 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 extension length of the flow guide channel is 15 to 17 times its flow width.

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 outer shell, the inner diameter of the flow separator is 0.7 to 0.75 times the inner cross-section of the outer shell, and the inner diameter of the lift pipe is 0.25 to 0.4 times the inner cross-section of the outer 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: 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 gravity direction, 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.

10. The gas-liquid separator according to claim 9, 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 less than the length of the extension section.

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