A cyclone separator
By using a sand-separating cover and sand-separating plate structure in the hydrocyclone separator, combined with a filter membrane and a mist eliminator, the problem of mud and sand being carried out at the liquid outlet is solved, achieving a more thorough solid-liquid separation effect and higher purity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- VERITAS TECH DEV (NINGBO) CO LTD
- Filing Date
- 2022-12-01
- Publication Date
- 2026-06-09
AI Technical Summary
In the process of separating oil and gas produced fluids, existing hydrocyclones tend to carry out silt and sand when the liquid is discharged from the liquid outlet, which leads to poor separation effect and makes it difficult to ensure the purity of the separated material.
The system employs a sand-separating cover and sand-separating plate structure inside the tank. The sand-separating cover isolates the first end of the liquid phase discharge pipe from the inner side wall of the tank, while the sand-separating plate forces the sludge to remain at the bottom of the tank. Combined with a filter membrane and a mist eliminator, this improves the solid-liquid separation effect.
This achieves more thorough solid-liquid separation of produced oil and gas fluids, reduces the phenomenon of liquid phase substances carrying out silt, and improves separation efficiency and purity.
Smart Images
Figure CN116803462B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of oil and gas extraction, and in particular to a cyclone separator. Background Technology
[0002] Oil and gas produced fluids generally contain sediment, especially in some natural gas wells and fractured shale gas wells, where the sand content is relatively high. In the oil and gas gathering and transportation process, the first step is to remove the sediment, which is done by using a hydrocyclone separator to separate the gas, liquid, and impurities.
[0003] For example, Chinese patent CN109054889A discloses a sand separator, including a base, a shell, and a centrifugal separator. The shell is mounted on the base, and the centrifugal separator is housed inside the shell. The upper end of the shell has a medium inlet communicating with the centrifugal separator. The shell is divided into a centrifugal initial separation zone, a gas phase separation zone, a liquid phase separation zone, and a sand storage zone. A guide pipe is connected to the lower end of the centrifugal separator. A drain port is located at the bottom of the shell, and an air outlet is located at the upper end of the shell. A liquid outlet is located on one side of the liquid phase separation zone, and a connecting pipe is provided between the liquid outlet and the air outlet at the upper end of the shell. A medium outlet is located above the liquid outlet on the connecting pipe.
[0004] Regarding the aforementioned technologies, the inventors believe that when liquid is discharged from the liquid outlet, it easily carries away the mud and sand near the liquid outlet, which reduces the separation effect and makes it difficult to guarantee the purity of the separated materials, thus leaving room for improvement. Summary of the Invention
[0005] To improve the solid-liquid separation effect, this application provides a cyclone separator.
[0006] This application provides a cyclone separator, which adopts the following technical solution:
[0007] A cyclone separator, comprising:
[0008] The tank has an inner cavity, a gas phase outlet and a drain outlet. The gas phase outlet is connected to the inner cavity and is located at the upper part of the tank. The drain outlet is connected to the inner cavity and is located at the bottom of the tank.
[0009] The feed pipe is located on the side wall of the tank body, and the oil and gas produced liquid enters the inner cavity through the feed pipe along the tangential direction of the inner side wall of the tank body;
[0010] A sand-proof cover is disposed within the inner cavity and adjacent to the upper side of the drain outlet. The sand-proof cover has a sand-proof cavity, the opening of which faces the drain outlet.
[0011] A liquid phase discharge pipe is provided on the tank body. The liquid phase discharge pipe has a first end and a second end. The first end passes through the side wall of the sand-proof cover and is inserted into the sand-proof cavity, and the second end extends out of the inner cavity.
[0012] By adopting the above technical solution, the produced oil and gas fluid is transported into the tank through the feed pipe for rotary separation. The gas phase mixture is discharged through the gas phase outlet, while the solid mixture such as mud and sand is deposited at the bottom of the tank. The sand shield isolates the first end of the liquid phase discharge pipe from the inner wall of the tank, so that when the liquid phase material is discharged from the tank through the liquid phase discharge pipe, it is not easy to carry out the solid mixture such as mud and sand that slides down the inner wall of the tank, making the solid-liquid separation more thorough.
[0013] Optionally, a sand-separating plate is also included, which is disposed between the sand-separating cover and the sewage outlet. There are gaps between the sand-separating plate and the sand-separating cover and the sewage outlet. The sand-separating plate is fixed relative to the tank body, and the sand-separating plate forces the mud and sand to remain at the bottom of the tank body.
[0014] By adopting the above technical solution, the sand baffle plate forces the solid mixture such as mud and sand at the bottom of the tank to remain at the bottom of the tank, so that when the liquid phase material is discharged from the tank through the liquid phase discharge pipe, it is not easy to carry out the solid mixture such as mud and sand that slides down the inner side wall of the tank, making the solid-liquid separation more thorough.
[0015] Optionally, a connecting plate is fixed to the lower side of the sand-separating plate, and the lower side of the connecting plate is fixedly connected to the bottom wall of the tank.
[0016] By adopting the above technical solution, the sand-blocking plate is fixed to the bottom of the tank.
[0017] Optionally, the outer diameter of the sand shield gradually decreases from bottom to top.
[0018] By adopting the above technical solution, the sand hood guides the solid mixture such as mud and sand to approach the inner wall of the tank, and is not easily carried out by the liquid phase substances when they are discharged from the tank through the liquid phase discharge pipe, thereby improving the solid-liquid separation effect.
[0019] Optionally, the sand shield is arranged in a frustum shape.
[0020] By adopting the above technical solution, the sand hood guides the solid mixture such as mud and sand to approach the inner wall of the tank, and is not easily carried out by the liquid phase substances when they are discharged from the tank through the liquid phase discharge pipe, thereby improving the solid-liquid separation effect.
[0021] Optionally, a filter membrane is provided at the second end of the liquid phase discharge pipe.
[0022] By adopting the above technical solution, the liquid phase discharged through the liquid phase outlet pipe is filtered, which further improves the solid-liquid separation effect.
[0023] Optionally, a separation pipe is provided on the upper side of the feed pipe. The separation pipe has an air inlet end and an air outlet end. The air inlet end is connected to the upper side of the feed pipe, and the air outlet end is connected to the tank body. The gas phase enters the tank body tangentially along the inner wall of the tank body through the separation pipe.
[0024] By adopting the above technical solution, gaseous substances can be separated from the oil and gas produced fluid in the feed pipe before entering the tank.
[0025] Optionally, the outlet end of the separator is inclined downward toward the tank.
[0026] By adopting the above technical solution, the gas-phase mixture entering the tank through the separation pipe has both an initial velocity in the horizontal direction and an initial velocity in the vertical downward direction.
[0027] Optionally, a mist eliminator is also included, which is disposed in the inner cavity and corresponding to the gas phase outlet.
[0028] By adopting the above technical solution, water mist in the gaseous substance is removed, thereby improving the purity of the gaseous substance obtained after separation by the cyclone separator.
[0029] Optionally, the direct connection section between the feed pipe and the tank is inclined downward toward the tank.
[0030] By adopting the above technical solution, the oil and gas produced fluid entering the tank through the feed pipe has both a horizontal initial velocity and a vertical downward initial velocity, so that solid substances such as mud and sand have greater downward kinetic energy, which promotes the separation of solid substances such as mud and sand from liquid substances when they reach the liquid surface of the tank.
[0031] In summary, this application includes at least one of the following beneficial technical effects:
[0032] 1. The produced oil and gas fluid is fed into the tank through the feed pipe for rotary separation. The gas phase mixture is discharged through the gas phase outlet, while the solid mixture such as mud and sand is deposited at the bottom of the tank. The sand shield isolates the first end of the liquid phase discharge pipe from the inner wall of the tank, so that when the liquid phase material is discharged from the tank through the liquid phase discharge pipe, it is not easy to carry out the solid mixture such as mud and sand that slides down the inner wall of the tank, making the solid-liquid separation more thorough.
[0033] 2. The sand baffle plate forces the solid mixture such as mud and sand at the bottom of the tank to remain at the bottom of the tank, so that when the liquid phase material is discharged from the tank through the liquid phase discharge pipe, it is not easy to carry out the solid mixture such as mud and sand that slides down the inner wall of the tank, so that the solid-liquid separation is more thorough. Attached Figure Description
[0034] Figure 1 This is a schematic diagram of the structure of a cyclone separator according to Embodiment 1 of this application.
[0035] Figure 2 yes Figure 1 A partial sectional view along the AA direction.
[0036] Figure 3 yes Figure 1 A partial sectional view along the BB direction.
[0037] Figure 4 This is a schematic diagram of the structure of a cyclone separator according to Embodiment 2 of this application.
[0038] Figure 5 This is Example 3 of this application.
[0039] Explanation of reference numerals in the attached drawings: 10. Tank body; 11. Inner cavity; 12. Gas phase outlet; 13. Drain outlet; 14. Guide plate; 15. Limiting plate; 16. Guide groove; 17. Guide cover; 171. Spiral groove; 20. Feed pipe; 21. Separation pipe; 211. Air inlet end; 212. Air outlet end; 213. Air inlet guide plate; 22. Direct connection section; 221. Feed guide plate; 23. External connection section; 30. Sand sieve; 31. Sand sieve cavity; 32. Fixed plate; 40. Liquid phase discharge pipe; 41. First end; 42. Second end; 43. Filter membrane; 50. Sand sieve plate; 51. Connecting plate; 60. Mist eliminator; 61. Guide pipe; 70. Sand scraping mechanism; 71. Sand scraper; 711. Extending column; 72. Drive float; 73. Connecting column. Detailed Implementation
[0040] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.
[0041] Example 1
[0042] This application discloses a cyclone separator. (Refer to...) Figure 1 The hydrocyclone separator includes a tank 10, a feed pipe 20, a sand shield 30, and a liquid discharge pipe 40.
[0043] The tank body 10 has an inner cavity 11, a gas phase outlet 12, and a drain outlet 13. The gas phase outlet 12 is located on the upper side wall of the tank body 10 and is interconnected with the cavity. The gas phase outlet 12 is connected to other pipelines via a flange pipe to discharge the gas phase separated from the oil and gas produced fluid into the tank body 10 for collection. The drain outlet 13 is located at the bottom of the tank body 10 and is interconnected with the cavity. The drain outlet 13 is connected to other pipelines via a flange pipe to discharge sludge and other substances separated from the oil and gas produced fluid into the tank body 10.
[0044] Reference Figure 1 and Figure 2The feed pipe 20 is located on the side wall of the tank 10. The produced oil and gas fluid enters the inner cavity 11 tangentially along the inner wall of the tank 10 through the feed pipe 20. Specifically, the feed pipe 20 includes a straight connection section 22. One end of the straight connection section 22 is fixed to the tank 10, and the other end can extend upwards at an angle away from the tank 10, extend horizontally to the outside of the tank 10, or extend downwards at an angle away from the tank 10. In this embodiment, the example of the other end of the straight connection section 22 extending upwards at an angle away from the tank 10 is used. This upward extension of the other end of the straight connection section 22 ensures that the produced oil and gas fluid entering the tank 10 through the feed pipe 20 has both a horizontal initial velocity and a vertically downward initial velocity, thus giving solid materials such as mud and sand greater downward kinetic energy. A feed guide plate 221 is also fixed inside the direct connection section 22 of the feed pipe 20. The feed guide plate 221 is inclined towards the axis of the direct connection section 22 of the feed pipe 20 along the direction of the oil and gas produced liquid entering the tank 10, so that the oil and gas produced liquid enters the inner cavity 11 through the feed pipe 20 along the tangential direction of the inner wall of the tank 10.
[0045] The feed pipe 20 also includes an external section 23, which is fixedly connected to the end of the direct connection section 22 away from the tank body 10. The external section 23 extends downward from the direct connection section 22 to transport the oil and gas produced fluid to a certain height before entering the tank body 10 through the direct connection section 22 of the feed pipe 20, so that the oil and gas produced fluid enters the tank body 10 at a sufficient height, thereby separating the oil and gas produced fluid.
[0046] Reference Figure 1 and Figure 3 A separation pipe 21 is provided on the upper side of the feed pipe 20. The separation pipe 21 has an inlet end 211 and an outlet end 212. The inlet end 211 of the separation pipe 21 is connected to the direct connection section 22 of the feed pipe 20 through a T-connector, so that the gas phase mixture in the oil and gas produced fluid can be separated and enter the separation pipe 21 before entering the tank 10 through the direct connection section 22 of the feed pipe 20. The outlet end 212 of the separation pipe 21 is connected to the tank 10. The inlet end 211 can extend upward at an angle, extend horizontally toward the tank 10, or extend downward at an angle. In this embodiment, the outlet end 212 extending downward at an angle is used as an example. The downward extension of the inlet end 211 means that the gas phase mixture entering the tank 10 through the separation pipe 21 has both a horizontal initial velocity and a vertical downward initial velocity. An air inlet guide plate 213 is fixed inside the separator 21. The air inlet guide plate 213 is inclined towards the axis of the section directly connected between the separator 21 and the tank 10 along the direction in which the gas phase mixture enters the tank 10, so that the gas phase mixture enters the inner cavity 11 through the feed pipe 20 along the tangential direction of the inner wall of the tank 10.
[0047] To further remove water mist from the gas mixture, a mist eliminator 60 is installed inside the tank 10. The mist eliminator 60 is located adjacent to the gas phase outlet 12 so that the gas mixture is discharged through the gas phase outlet 12 after water mist removal. A guide pipe 61 is fixed to the lower side of the mist eliminator 60, and the guide pipe 61 extends vertically downward to transport the liquid captured by the mist eliminator 60 to the lower part of the tank 10.
[0048] A sand-isolating cover 30 is disposed in the inner cavity 11, adjacent to the upper side of the drain outlet 13, with a certain height between the sand-isolating cover 30 and the drain outlet 13. The specific height can be set according to the actual situation. A fixing plate 32 is fixed on the outer wall of the sand-isolating cover 30. The side of the fixing plate 32 away from the sand-isolating cover 30 is fixed to the inner wall of the tank body 10 to fix the sand-isolating cover 30 to the tank body 10. The sand-isolating cover 30 has a sand-isolating cavity 31, and the opening of the sand-isolating cavity 31 is set facing the drain outlet 13.
[0049] The liquid discharge pipe 40 is fixed to the tank body 10. The liquid discharge pipe 40 has a first end 41 and a second end 42. The first end 41 of the liquid discharge pipe 40 passes through the side wall of the sand-separating cover 30 and is inserted into the sand-separating cavity 31. The second end 42 of the liquid discharge pipe 40 extends out of the inner cavity 11 of the tank body 10. The sand-separating cover 30 isolates the first end 41 of the liquid discharge pipe 40 from the inner side wall of the tank body 10, so that when the liquid phase material is discharged from the tank body 10 through the liquid discharge pipe 40, it is not easy to carry out the solid mixture such as mud and sand that slides down the inner side wall of the tank body 10, so that the solid-liquid separation is more thorough.
[0050] In order to further remove solid mixtures such as mud and sand from the liquid phase material discharged through the liquid phase discharge pipe 40, a filter membrane 43 is also installed at the second end 42 of the liquid phase discharge pipe 40.
[0051] The sand separator 30 is a rotating body, and its outer diameter gradually decreases from bottom to top to guide the solid mixture such as mud and sand towards the inner wall of the tank 10. This separates the solid mixture from the liquid phase inside the sand separator 30, making it less likely to carry away the solid mixture such as mud and sand that has slid down the inner wall of the tank 10 when the liquid phase is discharged from the tank 10 through the liquid phase discharge pipe 40, thus making the solid-liquid separation more thorough. In this embodiment, the sand separator 30 is arranged in a frustum shape.
[0052] The tank body 10 is also equipped with a sand baffle plate 50, which is located between the sand baffle cover 30 and the drain outlet 13. There is a gap between the sand baffle plate 50 and the sand baffle cover 30, and there is a gap between the sand baffle plate 50 and the drain outlet 13. A connecting plate 51 is fixed to the lower side of the sand baffle plate 50, and the lower side of the connecting plate 51 is welded and fixed to the bottom wall of the tank body 10. The sand baffle plate 50 makes it difficult for solid mixtures such as mud and sand on the lower side of the sand baffle plate 50 to enter the sand baffle cavity 31.
[0053] The implementation principle of a hydrocyclone separator according to an embodiment of this application is as follows: Oil and gas produced fluid is conveyed to a certain height through the feed pipe 20 and enters the tank 10 tangentially for cyclone separation. The gas phase mixture is discharged through the gas phase outlet 12 after water mist is removed by the mist eliminator 60. Solid mixtures such as silt and sand are deposited at the bottom of the tank 10 under the guidance of the sand baffle 30. The sand baffle 50 forces the solid mixtures such as silt and sand at the bottom of the tank 10 to remain there. The sand baffle 30 isolates the first end 41 of the liquid phase discharge pipe 40 from the inner wall of the tank 10, making it less likely that the liquid phase substances will carry away the solid mixtures such as silt and sand that have slid down the inner wall of the tank 10 when discharged through the liquid phase discharge pipe 40, thus making the solid-liquid separation more thorough.
[0054] Example 2
[0055] Reference Figure 4 The difference from Embodiment 1 is that it also includes a guide plate 14 and a limiting plate 15. The guide plate is fixed to the inner wall of the tank body 10, and the guide plate 14 extends spirally downward along the circumference of the tank body 10. The upper end of the guide plate 14 is located below the connection end between the feed pipe 20 and the tank body 10 to receive the oil and gas produced fluid entering the tank body 10 through the feed pipe 20. The lower end of the guide plate 14 is lower than the sand baffle 50 to guide the solid mixture such as mud and sand to slide to the lower side of the sand baffle 50. The limiting plate 15 is fixed to the side of the guide plate 14 near the axis of the tank body 10. The limiting plate 15 extends spirally with the guide plate 14. The guide plate 14, the limiting plate 15 and the inner wall of the tank body 10 cooperate to form a guide groove 16 to guide the oil and gas produced liquid to descend spirally. After the liquid phase material descends to the liquid surface in the tank body 10, it stops descending. The solid mixture such as mud and sand gathers at the bottom of the tank body 10 under the guidance of the guide groove 16.
[0056] A guide cover 17 is fixed to the upper side of the limiting plate 15. The lower end of the guide cover 17 extends to the lower end of the limiting plate 15, and the upper end of the guide cover 17 extends to the vicinity of the set liquid level of the tank 10. The guide cover 17 covers the upper side of the guide groove 16 to reduce the influence of liquid substances on the settling of solid mixtures such as mud and sand below the liquid surface. At the same time, it makes it less likely for solid mixtures such as mud and sand settling below the liquid surface to enter the sand-separating cavity 31 with the flow of liquid substances. As a result, when liquid substances are discharged from the tank 10 through the liquid discharge pipe 40, it is less likely to carry out solid mixtures such as mud and sand that have slid down the inner wall of the tank 10, making solid-liquid separation more thorough.
[0057] Example 3
[0058] Reference Figure 5 and Figure 6The difference from Embodiment 2 is that a scraping mechanism 70 is also provided inside the tank body 10. The scraping mechanism 70 is used to scrape solid materials such as mud and sand in the guide groove 16 to the bottom of the tank body 10. Specifically, the scraping mechanism 70 includes a scraping plate 71, a drive float 72, and a connecting column 73. The scraping plate 71 is located inside the guide groove 16 and between the guide cover 17 and the guide plate 14. An extension column 711 is fixed to the side of the scraping plate 71 near the limiting plate 15. The extension column 711 is located on the upper side of the scraping plate 71 and is horizontally arranged. A spiral groove 171 is opened on the limiting plate 15. The extension column 711 passes through the spiral groove 171 and can rotate and spirally rise and fall in the spiral groove 171. The connecting column 73 is vertically arranged. One end of the connecting column 73 is fixed to the end of the extended column 711 away from the scraper 71. The driving float 72 is fixed to the other end of the connecting column 73. The driving float 72 and the scraper 71 are located on the same side of the extended column 711.
[0059] Reference Figure 5 and Figure 7 Initially, there is no oil and gas produced fluid in tank 10. As the produced fluid continuously enters tank 10 from feed pipe 20, the liquid level in tank 10 continuously rises until it reaches the set level. The liquid level in tank 10 is maintained near the set level by the liquid discharge pipe 40 and the liquid inlet pipe 20. During the rise of the liquid level in tank 10, the drive float 72 first rotates 180° from a downward orientation around the extension column 711 to an upward orientation, thereby driving the scraper 71 to an upward orientation. Solid materials such as mud and sand can pass between the scraper 71 and the guide plate 14. Then, under the buoyancy of the liquid, the drive float 72 drives the scraper 71 to rise to near the set liquid level.
[0060] When all the liquid in the tank 10 is discharged, the drive float 72 first rotates 180° around the extension column 711 under the action of gravity until it is facing downwards, thereby driving the scraper 71 to face downwards. Then, the drive float 72 drives the scraper 71 to spiral down along the spiral groove 171 under the action of gravity, scraping the solid materials such as mud and sand on the upper side of the guide plate 14 to the bottom of the tank 10, thus realizing the automatic cleaning of the solid materials such as mud and sand on the upper side of the guide plate 14.
[0061] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A cyclone separator, characterized in that, include: The tank (10) has an inner cavity (11), a gas phase outlet (12) and a drain outlet (13). The gas phase outlet (12) is connected to the inner cavity (11) and is located at the upper part of the tank (10). The drain outlet (13) is connected to the inner cavity (11) and is located at the bottom of the tank (10). The feed pipe (20) is located on the side wall of the tank body (10). The oil and gas produced liquid enters the inner cavity (11) through the feed pipe (20) along the tangential direction of the inner side wall of the tank body (10). A sand-proof cover (30) is provided in the inner cavity (11) and adjacent to the upper side of the drain outlet (13). The sand-proof cover (30) has a sand-proof cavity (31) with the opening of the sand-proof cavity (31) facing the drain outlet (13). as well as A liquid discharge pipe (40) is provided on the tank body (10). The liquid discharge pipe (40) has a first end (41) and a second end (42). The first end (41) passes through the side wall of the sand shield (30) and is inserted into the sand shield cavity (31). The second end (42) extends out of the inner cavity (11). The guide plate (14) is fixed on the inner wall of the tank (10) and extends downward spirally along the circumference of the tank (10); The limiting piece (15) is fixed to the side of the guide piece (14) near the axis of the tank (10) and extends spirally with the guide piece (14). The limiting piece (15) cooperates with the guide piece (14) and the inner wall of the tank (10) to form a guide groove (16). A guide cover (17) is fixed to the upper side of the limiting piece (15) and covers the upper side of the guide groove (16). The lower end of the guide cover (17) extends to the lower end of the limiting piece (15), and the upper end extends to the vicinity of the set liquid level of the tank (10); and The scraping mechanism (70) includes a scraping plate (71), a driving float (72), and a connecting column (73). The scraping plate (71) is located in the guide groove (16) and between the guide cover (17) and the guide plate (14). An extension column (711) is fixed on the side of the scraping plate (71) near the limiting plate (15). The extension column (711) is located on the upper side of the scraping plate (71). A spiral groove is provided on the limiting plate (15). (171) The extended column (711) is inserted into the spiral groove (171). The extended column (711) can rotate in the spiral groove (171) and can spirally rise and fall in the spiral groove (171). One end of the connecting column (73) is fixed to the end of the extended column (711) away from the scraper (71). The driving float (72) is fixed to the other end of the connecting column (73). The driving float (72) and the scraper (71) are located on the same side of the extended column (711).
2. The cyclone separator according to claim 1, characterized in that: It also includes a sand-separating plate (50), which is located between the sand-separating cover (30) and the drain outlet (13). There are gaps between the sand-separating plate (50), the sand-separating cover (30), and the drain outlet (13). The sand-separating plate (50) is fixed relative to the tank body (10), and the sand-separating plate (50) forces the mud and sand to remain at the bottom of the tank body (10).
3. The cyclone separator according to claim 2, characterized in that: A connecting plate (51) is fixed to the lower side of the sand-separating plate (50), and the lower side of the connecting plate (51) is fixedly connected to the bottom wall of the tank body (10).
4. The cyclone separator according to claim 1, characterized in that: The outer diameter of the sand shield (30) gradually decreases from top to bottom.
5. The cyclone separator according to claim 4, characterized in that: The sand shield (30) is arranged in a frustum shape.
6. The cyclone separator according to claim 1, characterized in that: The second end (42) of the liquid phase discharge pipe (40) is provided with a filter membrane (43).
7. The cyclone separator according to claim 1, characterized in that: The feed pipe (20) is provided with a separation pipe (21) on its upper side. The separation pipe (21) has an air inlet (211) and an air outlet (212). The air inlet (211) is connected to the upper side of the feed pipe (20), and the air outlet (212) is connected to the tank (10). The gas phase enters the tank (10) tangentially along the inner wall of the tank (10) through the separation pipe (21).
8. The cyclone separator according to claim 7, characterized in that: The outlet end (212) of the separator (21) is inclined downward toward the tank (10).
9. The cyclone separator according to claim 1, characterized in that, It also includes a mist eliminator (60), which is disposed in the inner cavity (11) and is provided corresponding to the gas phase outlet (12).
10. The cyclone separator according to claim 1, characterized in that: The direct connection section between the feed pipe (20) and the tank (10) is inclined downward toward the tank (10).