Rotary vane gas-liquid separator with high drainage performance

Abstract

According to the high-drainage-performance rotary vane gas-liquid separator, millimeter-level drainage holes are formed in the middle-lower portion of an inner cylinder in a zoning mode according to the liquid film forming characteristic, and micron-level hydrophilic holes are formed in the high position of the inner cylinder to replace a circular ring between the top of the inner cylinder and a gas outlet cylinder for drainage; and the water drainage performance of the steam-water separator is improved by combining with an inclined microneedle one-way conveying surface, liquid film breakage and secondary liquid drop entrainment are reduced, and the gas amount in drained water is reduced. The drainage holes with different sizes are distributed in the inner cylinder in a targeted manner, so that a wall surface liquid film is discharged to the outer cylinder in real time, the wall surface liquid film is prevented from being accumulated, secondary liquid drops formed by shredding the liquid film by gas are reduced, and secondary entrainment and overall pressure drop of the broken liquid drops of the liquid film in the inner cylinder are reduced; meanwhile, gas entering the outer barrel descending channel through the drainage hole is reduced, the amount of gas entrained by liquid in the outer barrel descending channel is reduced, and therefore the gas-liquid separation efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of nuclear power steam power generation technology, and more specifically, to a high-dissipation-performance rotary vane gas-liquid separator. Background Technology

[0002] Inside the steam generator of a pressurized water reactor nuclear power plant, the steam-water separator plays a crucial role as a core component. After passing through the steam-water separator, most of the liquid components are removed, ensuring that the saturated steam humidity delivered to the dryer and ultimately reaching the turbine is below a preset threshold, thus guaranteeing the safety, stability, efficiency, and economy of the nuclear power system. The steam-water separator typically consists of a vane separator and a dryer, with the vane separator responsible for separating over 80% of the wet steam. The operating principle of the vane separator is based on the characteristic that the liquid density in the steam-water mixture is significantly higher than the gas density: when the mixture passes through the vanes, centrifugal force causes the liquid to migrate towards the wall, while the gas accumulates in the center of the flow channel and enters the dryer through the exhaust port of the inner cylinder. The separated liquid accumulates on the wall and gradually forms a liquid film, which flows upward and enters the descending channel at the top of the inner cylinder, leaving the steam-water separator. Timely discharge of the liquid film is crucial for achieving high separation efficiency. Existing separators typically have evenly distributed millimeter-sized drainage holes on the inner cylinder surface above the vortex blades. A portion of the liquid is discharged through these holes, while the remaining liquid is discharged mainly through a ring between the top of the inner cylinder and the outlet cylinder. This method is highly susceptible to the accumulation of a thick liquid film on the inner cylinder wall due to delayed drainage. Under the shearing action of the gas, this film is torn apart, causing secondary droplet entrainment and reducing gas-liquid separation efficiency.

[0003] Patent application CN114392610A discloses a gas-liquid vortex separator with a microneedle unidirectional transport surface, comprising an inner cylinder, an outlet pipe, and an outer cylinder. The outer cylinder has a closed top and a central through-hole for installing the outlet pipe, which is fixedly connected to the outer cylinder. The inner cylinder is located inside the outer cylinder, and the two are connected by external ribs. The bottom of the inner cylinder extends beyond the bottom of the outer cylinder. However, this patent has a narrow applicable gas-liquid flow range and is prone to problems under high or low liquid flow conditions. Under high liquid flow conditions, the number of drain holes is insufficient, failing to drain the liquid film in time, resulting in a thicker liquid film on the inner cylinder wall and secondary liquid film entrainment. Under low liquid flow conditions, gas entrainment is easily observed in the drain holes on the inner cylinder wall, the annular drain outlet between the top of the inner cylinder and the outlet pipe, hindering the discharge of liquid in the descending channel. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the purpose of this invention is to provide a high-performance rotary vane gas-liquid separator.

[0005] The high-drainage-performance vortex gas-liquid separator provided by the present invention includes: an inner cylinder, an outer cylinder, and a vortex assembly disposed within the inner cylinder; the outer cylinder is sleeved outside the inner cylinder, and the bottom of the inner cylinder extends beyond the bottom of the outer cylinder; the top of the inner cylinder is provided with an exhaust port, and the bottom of the outer cylinder is provided with a liquid discharge port.

[0006] The inner cylinder wall has multiple sets of drainage holes at a position higher than the vane assembly, for discharging the liquid film adhering to the inner cylinder wall to the descending channel between the inner cylinder and the outer cylinder. The multiple sets of drainage holes include a lower drainage hole group, a middle drainage hole group, and an upper drainage hole group distributed along the axial direction of the inner cylinder. The lower drainage hole group is located in the inner cylinder wall area near the highest point of the rotor assembly, the middle drainage hole group is located in the inner cylinder wall area above the lower drainage hole group, and the upper drainage hole group is located in the inner cylinder wall area above the middle drainage hole group. The diameter of the drainage holes in the lower drainage hole group and the middle drainage hole group is on the order of millimeters; The drainage holes in the upper drainage hole group are micron-sized winged microchannel holes.

[0007] Preferably, the drainage holes of the lower drainage hole group are distributed in the inner cylinder wall area near the trailing edge of the blade assembly; the drainage holes of the middle drainage hole group are evenly distributed, and their diameter gradually decreases from bottom to top along the axial direction of the inner cylinder.

[0008] Preferably, in the inner cylinder wall area where the upper drainage hole group is provided, the inner wall surface and the outer wall surface of the inner cylinder are both provided with an inclined microneedle array to form an inclined microneedle unidirectional transport surface. The microneedles on the inner wall surface of the inner cylinder are arranged at an upward angle, while the microneedles on the outer wall surface of the inner cylinder are arranged at a downward angle.

[0009] Preferably, the top of the outer cylinder is welded to the outer wall of the inner cylinder, and a return air hole is provided at the weld joint to return the gas in the descending channel to the upper part of the inner cylinder.

[0010] Preferably, the outer cylinder includes an upper tapered tube and a lower straight tube, the large-diameter end of the upper tapered tube is connected to the outer wall of the inner cylinder, and the small-diameter end of the upper tapered tube is connected to the lower straight tube.

[0011] Preferably, the middle drainage hole group is arranged in an area 0.5 to 1.5 times the inner cylinder diameter above the trailing edge of the blade assembly; the upper drainage hole group is arranged in an area 2 to 3 times the inner cylinder diameter above the trailing edge of the blade assembly.

[0012] Preferably, the diameter of the drainage holes in the central drainage hole group gradually decreases from 4 mm to 0.5 mm from bottom to top along the axial direction of the inner cylinder.

[0013] Preferably, the diameter of the microneedle is 150 μm, and the spacing between adjacent microneedles is 400 μm; the inclination direction of the microneedle is at a 65° angle to the horizontal plane and a 30° angle to the normal direction of the wall.

[0014] Preferably, the diameter of the winged microchannel holes in the upper drainage hole group is 100~200μm.

[0015] Preferably, the blade assembly includes a central column and a plurality of blades arranged around the central column; the interior of the inner cylinder is divided by the blade assembly into a lower inlet section and an upper inner cylinder rising section.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention features drainage holes in three regions—lower, middle, and upper—with diameters ranging from millimeters to micrometers on the inner wall surface of the inner cylinder above the rotor blades. The lower drainage holes are mainly located near the highest point of the rotor blades, promptly draining the liquid film formed on the inner cylinder wall surface in the rotor blade region. The middle drainage holes are mainly located slightly above the lower drainage holes, promptly draining the liquid film formed near the lower middle part of the inner cylinder after the secondary breakage of droplets at the rotor blade outlet is re-separated. The upper drainage holes utilize micrometer-sized winged microchannels to drain the thin liquid film formed after separation of extremely small droplets secondary entrained in the lower middle part. The upper winged microchannel of the inner cylinder... The system exhibits differentiated flow characteristics between gas and liquid, allowing liquid to pass through easily while gas faces high resistance. The relatively low pressure difference between the inner and outer cylinders is insufficient to overcome the gas flow resistance, thus preventing gas from entering the outer cylinder's descending channel through the microchannel. By strategically distributing drainage holes of different sizes within the inner cylinder, the liquid film on the inner wall is discharged to the outer cylinder in real time, preventing liquid film accumulation on the inner cylinder wall, reducing the formation of secondary droplets from the broken liquid film by gas, and decreasing secondary entrainment of broken droplets within the inner cylinder and overall pressure drop. Simultaneously, it reduces the amount of gas entering the outer cylinder's descending channel through the drainage holes, lowering the amount of gas entrained in the liquid within the outer cylinder's descending channel, thereby improving gas-liquid separation efficiency. Attached Figure Description

[0017] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a structural diagram of the rotary vane separator proposed in this invention; Figure 2 This is a three-dimensional front view of the vane assembly and the lower drainage area of ​​the inner cylinder in this invention; Figure 3 This is a top view of the drainage hole at the top of the inner cylinder in this invention; Figure 4 This is a schematic diagram of the drainage hole at the top of the inner cylinder and the inclined microneedles on the inner wall surface of the inner cylinder in this invention; Figure 5 This is a schematic diagram of the air return hole in the inner cylinder of the present invention; In the diagram: 1. Inlet section; 2. Rotary blade assembly; 3. Inner cylinder rising section; 4. Drainage hole at the bottom of the inner cylinder; 5. Drainage hole in the middle of the inner cylinder; 6. Drainage hole with wing shape at the top of the inner cylinder; 7. Inclined microneedles on the inner and outer wall surfaces of the inner cylinder; 8. Return air hole in the inner cylinder; 9. Exhaust port; 100. Inner cylinder; 200. Upper conical tube of the outer cylinder; 300. Lower straight tube of the outer cylinder. Detailed Implementation

[0018] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the scope of protection of the present invention.

[0019] Example This invention proposes a high-drainage-performance gas-liquid vortex separator, achieving high separation efficiency, low gas entrainment, and low pressure drop by promptly discharging the liquid film separated onto the inner cylinder wall. The inner cylinder wall surface above the vortex blades has three regions: lower, middle, and upper, with drainage holes ranging from millimeter to micrometer in diameter. The lower drainage holes are mainly distributed on the inner wall near the highest point of the vortex blades, promptly discharging the liquid film formed on the inner cylinder wall surface in the vortex blade area. The middle drainage holes are mainly distributed in the area slightly above the lower drainage holes, aiming to promptly discharge the liquid film formed near the lower middle position of the inner cylinder after the secondary breakage of droplets at the vortex blade outlet. The upper drainage holes mainly discharge the liquid film formed after the separation of extremely small droplets generated by secondary entrainment in the middle and lower parts. This liquid film is relatively thin; opening the millimeter-sized drainage holes will result in a large amount of gas being entrained into the descending channel of the outer cylinder. Simultaneously, the swirling intensity at this height is weak, and the gas's ability to carry the wall liquid film upwards is weak. Although the liquid is small, if not discharged promptly, it is prone to accumulation, causing it to be torn apart and entrained again by the gas. To address this, the upper drainage holes utilize micron-sized drainage holes, which are winged microchannels that facilitate the transport of liquid separated on the upper wall of the inner cylinder from the inner cylinder to the outer cylinder. It is noteworthy that these winged microchannels exhibit different flow characteristics for gas and liquid. Liquid flows through easily, while gas faces high resistance. The relatively low pressure difference between the inner and outer cylinders of the rotary separator is insufficient to overcome this high flow resistance, preventing gas from entering the outer cylinder through the microchannel. The inner cylinder features drainage holes of varying sizes to discharge the liquid film into the outer cylinder in real time, preventing liquid film accumulation on the inner cylinder wall, reducing the formation of secondary droplets from gas tearing, minimizing secondary entrainment of broken droplets within the inner cylinder, and reducing pressure drop. Simultaneously, it reduces gas penetration through the drainage holes and minimizes gas entrainment in the liquid-liquid descending channel outside the outer cylinder, thus improving gas-liquid separation efficiency.

[0020] Specifically, the present invention is achieved through the following technical solutions: The high-performance gas-liquid vortex separator provided by this invention includes an inner cylinder, an outer cylinder, and a vortex assembly. The inner cylinder is placed inside the outer cylinder, and its bottom extends beyond the bottom of the outer cylinder. The outer cylinder consists of an upper tapered tube and a lower straight tube, with its top welded to the outer wall of the inner cylinder. The vortex assembly is installed at a lower position inside the inner cylinder. An exhaust port is located slightly below the connection point with the outer cylinder on the inner cylinder, for discharging gas from the outer cylinder to the upper part of the inner cylinder. The bottom of the outer cylinder is the outlet for the separated liquid.

[0021] The inner cylinder is equipped with a swivel assembly, which consists of a central column and swivel blades. The part above the swivel assembly is the rising section of the inner cylinder, the area below the swivel assembly is the inlet section, and the area of ​​the swivel assembly closest to the rising section of the inner cylinder is the swivel outlet area.

[0022] The inner cylinder has drainage holes arranged above the vane to discharge the liquid film into the outer cylinder.

[0023] The inner wall of the inner cylinder has drainage holes in three areas: lower, middle, and upper. The drainage holes in the lower area are millimeter-sized holes (approximately 4 mm in diameter), mainly distributed near the trailing edge of the four blades, which can promptly discharge the liquid film separated and accumulated in the contact area between the blades and the inner cylinder.

[0024] The drainage holes in the middle area are arranged in a region approximately 0.5 to 1.5 times the inner cylinder diameter above the tail edge of the rotor blade. The holes in this region are evenly distributed with a diameter that gradually decreases from 4 mm to 0.5 mm from bottom to top, so as to achieve the discharge of the liquid film separated from the rotor blade outlet to the middle of the inner cylinder.

[0025] The upper drainage area features 100-200 micrometer diameter, winged holes on the cylinder wall within a region approximately 2-3 times the inner cylinder diameter above the blade trailing edge. These holes are hydrophilic, allowing easy passage of liquids, but offering significant resistance to gas flow, effectively blocking gas passage. Simultaneously, inclined micron-sized microneedles are arranged on both the inner and outer walls of the inner cylinder where the upper drainage holes are located. The upward-sloping microneedles on the inner wall flatten the liquid film distribution through a pinning effect, promoting uniform upward transport of the liquid film and reducing excessive local accumulation. This uniform liquid film also forms a liquid curtain, blocking gas from passing through the micron-sized drainage holes. The downward-sloping microneedles on the outer wall prevent droplet splashing into the descending channel through a pinning effect, adsorbing the liquid film onto the outer wall and flattening its distribution, promoting uniform downward transport. Together, the upper micron-sized drainage holes and the inclined microneedles on the inner wall ensure timely drainage of water separated in the upper weak swirling zone to the outer cylinder, while preventing gas from entering the outer cylinder.

[0026] The inner cylinder has drainage holes of different sizes that are distributed in a targeted manner to discharge the liquid film into the outer cylinder in real time, which avoids the accumulation of liquid film on the inner cylinder wall, reduces the formation of secondary droplets by the liquid film being torn apart by gas, reduces the secondary entrainment of broken liquid droplets in the inner cylinder, and reduces pressure drop; at the same time, it reduces the amount of gas passing through the drainage holes and the liquid entraining gas in the outer cylinder descending channel, thereby improving the gas-liquid separation efficiency.

[0027] like Figure 1 As shown, this embodiment relates to a gas-liquid vortex separator with high drainage performance, featuring a combination of millimeter- and micrometer-level drainage holes and an inclined microneedle transport surface. It includes an inner cylinder 100, an outer cylinder, and a vortex assembly 2. The inner cylinder 100 is placed inside the outer cylinder, with an exhaust port 9 at its top. The bottom of the inner cylinder 100 extends beyond the bottom of the outer cylinder, and the vortex assembly 2 is installed at a lower position inside the inner cylinder 100.

[0028] like Figure 2 As shown, the blade assembly 2 is equipped with blades, and millimeter-sized drainage holes are provided in the inner wall area near the highest point of the blades to promptly discharge the liquid film formed on the inner wall surface of the cylinder in the blade area.

[0029] like Figure 3 , Figure 4As shown, an upper drainage hole 6 is provided between the inner and outer wall surfaces in the upper region of the inner cylinder. This drainage hole is a wing-shaped drainage hole with a diameter of 100-200 micrometers, used to discharge the thin liquid film composed of extremely small droplets formed after secondary entrainment in the middle and lower parts during the separation process. Simultaneously, inclined microneedles 7 are arranged on the inner and outer wall surfaces of the inner cylinder in the upper drainage hole region. The inner wall surface of the inner cylinder is formed into a transport surface composed of inclined microneedles 7 by laser plasma etching, wherein the diameter of the microneedles is 150 μm and the spacing is 400 μm. Experimental analysis shows that the configuration of the inclined microneedle array at a 65° angle to the horizontal plane and a 30° angle to the normal direction of the wall provides the optimal experimental results.

[0030] The outer cylinder comprises an upper tapered tube 200 and a lower straight tube 300, wherein the top of the outer cylinder is welded to the outer wall of the inner cylinder 100, and the bottom of the outer cylinder is a discharge port for the separated liquid. Figure 5 As shown, there is a return air hole 8 at the weld between the top of the outer cylinder and the inner cylinder 100.

[0031] When the gas-liquid mixture enters the device through the inner cylinder inlet section 1, the gas-liquid two-phase flow fully develops within the inner cylinder and forms a rotating two-phase flow with a certain rotational intensity after passing through the swivel assembly 2. This rotating flow enters the inner cylinder rising section 3 through the swivel outlet area. Under the influence of various factors such as droplet collision and airflow shearing, instability occurs on the surface of the liquid film in the swivel outlet area. The liquid film extending from the highest point of the swivel is easily broken by the airflow, forming secondary droplets that are then entrained by the airflow again, affecting the gas-liquid separation efficiency. To avoid the above problems, this embodiment provides a lower area drainage hole 4 on the inner wall near the highest point of the swivel, which can promptly discharge the liquid film formed on the inner cylinder wall surface in the swivel area. At the same time, holes with a diameter gradually decreasing from 4 mm to 0.5 mm from bottom to top are provided in a region approximately 0.5 to 1.5 times the inner cylinder diameter above the swivel tail edge, in 12 rows. This distribution structure can promptly discharge the liquid film formed near the lower part of the inner cylinder after the secondary breakage of the droplets at the swivel outlet. Within a region approximately 2 to 3 times the inner cylinder diameter above the blade trailing edge, 100-200 micrometer-diameter wing-shaped drainage holes are provided on the cylinder wall. These upper micrometer-sized wing-shaped drainage holes 6, together with the inclined microneedles 7 on the inner cylinder wall surface, facilitate the transport of the separated liquid from the inner cylinder to the outer cylinder. The liquid is discharged into the outer cylinder through the drainage holes 5 in the middle of the inner cylinder and 6 in the upper part. Gas carried into the outer cylinder by the liquid enters the inner cylinder through the return gas hole 8 at the top of the inner cylinder.

[0032] In existing gas-liquid cyclone separators, problems easily arise under high or low liquid flow conditions when separating gas-water mixtures. Under high liquid flow conditions, the number of drain holes is insufficient to drain the liquid film in time, resulting in a thicker liquid film on the inner cylinder wall and secondary liquid film entrainment. Under low liquid flow conditions, gas entrainment is highly likely to occur in the drain holes on the inner cylinder wall, the annular drain port between the top of the inner cylinder and the outlet cylinder, hindering liquid discharge in the descending channel. To address these problems, this invention optimizes the structure and arrangement of the drain holes in the inner cylinder to improve liquid film stability and suppress secondary droplet generation. Millimeter-level drain holes are arranged in designated areas in the lower part of the inner cylinder to address liquid film formation characteristics, while micron-level hydrophilic holes are arranged in the higher parts of the inner cylinder to replace the annular drain port between the top of the inner cylinder and the outlet cylinder. These holes, combined with the inclined microneedle unidirectional transport surface, improve the drainage performance of the gas-water separator, reduce liquid film breakage and secondary droplet entrainment, reduce the amount of gas in the drainage, thereby improving separation efficiency and reducing the pressure drop of the separator. Air-water separation experiments verified that, within a working range of 6–18 m / s apparent gas velocity and 0.3%–5.0% liquid volume fraction, the high-drainage-performance vortex vapor-water separator proposed in this invention achieves a vapor-water separation efficiency approximately 1.3%–15.6% higher than that of traditional separators. Experimental results indicate that this structure effectively suppresses secondary entrainment caused by liquid film rupture, significantly improving gas-liquid separation efficiency and demonstrating promising engineering application prospects.

[0033] In summary, compared with existing technologies, traditional rotary vane separators are prone to insufficient drainage holes under high liquid flow conditions, resulting in inadequate liquid film discharge and a thicker liquid film remaining on the inner cylinder wall, leading to secondary liquid film entrainment. Under low liquid flow conditions, gas entrainment is highly likely to occur at the drainage holes on the inner cylinder wall, the annular drain port between the top of the inner cylinder and the outlet, hindering liquid discharge in the descending channel. This invention addresses this issue by optimizing the structure and arrangement of the drainage holes on the inner cylinder wall, achieving a new separation mechanism where liquid can flow smoothly through the drainage holes while gas is blocked, significantly improving separation efficiency and reducing separator pressure drop. This design improves the operational stability and separation performance of the equipment under high liquid flow conditions by preventing liquid film accumulation and secondary entrainment.

[0034] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0035] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A high-performance rotary vane gas-liquid separator, characterized in that, include: The system includes an inner cylinder, an outer cylinder, and a swivel assembly disposed within the inner cylinder. The outer cylinder is fitted over the outside of the inner cylinder, and the bottom of the inner cylinder extends beyond the bottom of the outer cylinder. The top of the inner cylinder has an exhaust port, and the bottom of the outer cylinder has a liquid discharge port. The inner cylinder wall has multiple sets of drainage holes at a position higher than the vane assembly, for discharging the liquid film adhering to the inner cylinder wall to the descending channel between the inner cylinder and the outer cylinder. The multiple sets of drainage holes include a lower drainage hole group, a middle drainage hole group, and an upper drainage hole group distributed along the axial direction of the inner cylinder. The lower drainage hole group is located in the inner cylinder wall area near the highest point of the rotor assembly, the middle drainage hole group is located in the inner cylinder wall area above the lower drainage hole group, and the upper drainage hole group is located in the inner cylinder wall area above the middle drainage hole group. The diameter of the drainage holes in the lower drainage hole group and the middle drainage hole group is on the order of millimeters; The drainage holes in the upper drainage hole group are micron-sized winged microchannel holes.

2. The high-drainage-performance vortex gas-liquid separator according to claim 1, characterized in that, The drainage holes of the lower drainage hole group are distributed in the inner cylinder wall area near the trailing edge of the blade assembly; the drainage holes of the middle drainage hole group are evenly distributed, and their diameter gradually decreases from bottom to top along the axial direction of the inner cylinder.

3. The high-drainage-performance vortex gas-liquid separator according to claim 1, characterized in that, In the inner cylinder wall region where the upper drainage hole group is provided, the inner wall surface and the outer wall surface of the inner cylinder are both provided with inclined microneedle arrays, forming an inclined microneedle unidirectional transport surface. The microneedles on the inner wall surface of the inner cylinder are arranged at an upward angle, while the microneedles on the outer wall surface of the inner cylinder are arranged at a downward angle.

4. The high-drainage-performance vortex gas-liquid separator according to claim 1, characterized in that, The top of the outer cylinder is welded to the outer wall of the inner cylinder, and a return air hole is provided at the weld joint to allow the gas in the descending channel to flow back to the upper part of the inner cylinder.

5. The high-drainage-performance vortex gas-liquid separator according to claim 1, characterized in that, The outer cylinder includes an upper tapered tube and a lower straight tube. The large-diameter end of the upper tapered tube is connected to the outer wall of the inner cylinder, and the small-diameter end of the upper tapered tube is connected to the lower straight tube.

6. The high-drainage-performance vortex gas-liquid separator according to claim 2, characterized in that, The middle drainage hole group is arranged in an area 0.5 to 1.5 times the inner cylinder diameter above the trailing edge of the blade assembly; the upper drainage hole group is arranged in an area 2 to 3 times the inner cylinder diameter above the trailing edge of the blade assembly.

7. The high-drainage-performance vortex gas-liquid separator according to claim 6, characterized in that, The diameter of the drainage holes in the central drainage hole group gradually decreases from 4 mm to 0.5 mm from bottom to top along the axial direction of the inner cylinder.

8. The high-drainage-performance vortex gas-liquid separator according to claim 3, characterized in that, The microneedles have a diameter of 150 μm and a spacing of 400 μm between adjacent microneedles; the microneedles are tilted at an angle of 65° to the horizontal plane and at an angle of 30° to the normal direction of the wall.

9. The high-drainage-performance vortex gas-liquid separator according to claim 1, characterized in that, The diameter of the winged microchannel holes in the upper drainage hole group is 100~200μm.

10. The high-drainage-performance vortex gas-liquid separator according to claim 1, characterized in that, The blade assembly includes a central column and multiple blades arranged around the central column; the interior of the inner cylinder is divided by the blade assembly into a lower inlet section and an upper inner cylinder rising section.

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