Bubble separation device and three-phase separator

Abstract

This invention provides a bubble separation device and a three-phase separator, relating to the field of petroleum processing technology. The bubble separation device includes a housing with openings at both ends. The inner diameter of the housing gradually increases from the first end to the second end. The housing has multiple through holes, and a flow guiding mechanism is provided at the first end to guide fluid in a spiral flow from the first end into the housing, forming a swirling flow field. The bubble separation device and three-phase separator provided by this invention, by having multiple through holes in the housing, allow small-diameter bubbles to collide and coalesce within the through holes, forming larger-diameter bubbles at the opening near the second end of the housing. The flow guiding mechanism at the first end of the housing allows the fluid to flow spirally from the first end into the housing, forming a swirling flow field and providing sufficient shear force to detach the large-diameter bubbles at the opening, effectively removing bubbles from the fluid.

Description

Technical Field

[0001] This invention relates to the field of petroleum processing technology, and in particular to a bubble separation device and a three-phase separator. Background Technology

[0002] In recent years, the deep processing of inferior heavy oil has become a key focus of technology development in the oil refining industry. Among them, the fluidized bed heavy oil hydrogenation technology has significant advantages in the lightening of heavy oil. It has advantages such as online catalyst replacement, high utilization rate, long operating cycle, and flexible unit operation, which can meet the requirements of large-scale unit operation and long-term operation.

[0003] In fluidized bed hydrogenation technology, preventing catalyst carryover from the reactor is crucial. A three-phase separator is typically installed at the top of the reactor to ensure the effluent is free of catalyst or solid particles. When the fluid enters the three-phase separator, it first performs preliminary gas separation, with the gas separating from the liquid and solid phases in the form of bubbles. However, the fluid contains small-diameter bubbles, and current technologies struggle to achieve the coalescence and separation of these small bubbles, resulting in poor degassing performance. Summary of the Invention

[0004] This invention provides a bubble separation device and a three-phase separator to solve the technical problem of poor degassing effect of the three-phase separator in the prior art.

[0005] This invention provides a bubble separation device, including a cover with openings at both ends, and the inner diameter of the cover gradually increases from the first end to the second end;

[0006] The cover is provided with multiple through holes, and the first end is provided with a flow guiding mechanism. The flow guiding mechanism is used to guide the fluid to flow forward in a spiral shape from the first end into the cover to form a swirling flow field.

[0007] According to a bubble separation device provided by the present invention, the flow guiding mechanism includes a plurality of flow guiding plates, which are distributed at intervals on the inner wall of the first end.

[0008] According to a bubble separation device provided by the present invention, the root to the end of the guide vane is gradually twisted in a direction perpendicular to the central axis of the cover to form a curved guide surface.

[0009] According to a bubble separation device provided by the present invention, a plurality of through holes are distributed parallel to each other at intervals on the cover, and the central axis of the plurality of through holes is parallel to the central axis of the cover.

[0010] According to the bubble separation device provided by the present invention, the total opening area of ​​the plurality of through holes accounts for 50% to 95% of the total inner wall area of ​​the cover.

[0011] According to the bubble separation device provided by the present invention, the opening diameter of the first end accounts for 10% to 30% of the opening diameter of the second end.

[0012] In a second aspect, the present invention provides a three-phase separator, comprising a first housing, a second housing, and a bubble separation device as described in the first aspect;

[0013] The first housing is housed within the second housing, the second housing includes an inlet and an outlet, the first housing has openings at both ends, the bubble separation device is disposed within the first housing and located at the end of the first housing away from the inlet, the second end of the bubble separation device faces the side away from the inlet, and the outer wall surface of the first housing is spaced apart from the inner wall surface of the second housing.

[0014] According to a three-phase separator provided by the present invention, the three-phase separator further includes a third housing, the third housing being housed within a second housing, the third housing having an opening at one end near the discharge port, and the first housing being at least partially located within the third housing;

[0015] The outer wall surface of the first housing is spaced apart from the inner wall surface of the third housing, and the outer wall surface of the third housing is spaced apart from the inner wall surface of the second housing.

[0016] According to a three-phase separator provided by the present invention, a plurality of flow guide slits are provided at the end of the first housing away from the feed inlet. The flow guide slits extend along the length direction of the first housing, and the plurality of flow guide slits are distributed at intervals around the central axis of the first housing, so that the end of the first housing away from the feed inlet is comb-shaped.

[0017] According to a three-phase separator provided by the present invention, the bottom end of the flow guide slit is located away from the feed inlet relative to the second end of the bubble separation device.

[0018] The bubble separation device and three-phase separator provided by this invention have multiple through holes in the cover, which serve as microchannels for the fluid. Small-diameter bubbles in the fluid enter the through holes, where they collide and coalesce, forming larger-diameter bubbles at the orifice near the second end of the cover. By setting a flow guiding mechanism at the first end of the cover, the fluid flows spirally into the cover from the first end to form a swirling flow field, providing sufficient shear force to detach the large-diameter bubbles at the orifice. This effectively removes bubbles from the fluid, achieving efficient separation of gas from liquid and solid phases and enhancing the degassing effect. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the bubble separation device provided by the present invention;

[0021] Figure 2 This is a cross-sectional view of the bubble separation device provided by the present invention;

[0022] Figure 3 This is a schematic diagram of the three-phase separator provided by the present invention.

[0023] Figure label:

[0024] 1: Bubble separation device; 10: Cover; 101: Through hole; 102: Flow guiding mechanism; 2: First shell; 21: Body; 22: First flow guiding part; 3: Second shell; 31: Inlet; 32: Outlet; 33: Second flow guiding part; 4: Third shell; 41: Third flow guiding part. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0026] In the description of this invention, it should be understood that the terms "upper", "lower", "inner", "outer", "top", "bottom", "axial", 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 invention 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 invention.

[0027] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] like Figure 1 and Figure 2 As shown, the bubble separation device 1 provided by the present invention includes a cover 10 with openings at both ends, and the inner diameter of the cover 10 gradually increases from the first end to the second end.

[0030] The cover 10 is provided with multiple through holes 101, and a flow guiding mechanism 102 is provided at the first end. The flow guiding mechanism 102 is used to guide the fluid to flow forward in a spiral shape from the first end into the cover 10 to form a swirling flow field.

[0031] The bubble separation device 1 is installed in a three-phase separator to separate bubbles in a fluid. The cover 10 has openings at both its first and second ends, with the inner diameter of the first end being smaller than that of the second end, allowing fluid to flow from the first end to the second end. The cover 10 can be arc-shaped, conical, or similar, as long as its inner diameter gradually increases from the first end to the second end. For example… Figure 2 The cover 10 is arc-shaped.

[0032] The thickness of the cover 10 is 5mm to 30mm. Preferably, the thickness of the cover 10 can be 10mm to 20mm. For example, the thickness of the cover 10 can be 10mm, 20mm or any value between 10mm and 20mm.

[0033] The through-hole 101 penetrates the cover 10, allowing air bubbles in the fluid to flow through it. The inner diameter of the through-hole 101 is 2mm to 10mm; for example, the inner diameter of the through-hole 101 can be any value between 2mm, 10mm, or 2mm to 10mm. Preferably, the inner diameter of the through-hole 101 is 3mm to 5mm; for example, the inner diameter of the through-hole 101 can be any value between 3mm, 5mm, or 3mm to 5mm.

[0034] The inner diameter of the through hole 101 is relatively small. Based on the mechanism of bubble collision and coalescence, the through hole 101 can correct the manifold of small-diameter bubbles, transform random bubbles into axial bubbles, and improve the coalescence effect of small-diameter bubbles. Small-diameter bubbles in the fluid collide and coalesce in the through hole 101, forming larger-diameter bubbles at the opening of the through hole 101 near the second end of the cover 10. The larger the diameter of the bubble, the faster it overflows from the liquid, which is beneficial for the bubbles to separate from the fluid and enhances the degassing effect.

[0035] The central axes of the plurality of through holes 101 may be parallel to each other or inclined relative to each other. For example, in one embodiment, the central axes of the plurality of through holes 101 are all inclined toward the central region of the cover 10.

[0036] After small-diameter bubbles form large-diameter bubbles at the orifice 101 under the action of the through hole 101, a certain amount of external force is required to remove the large-diameter bubbles from the orifice. The bubble separation device provided in this embodiment of the invention has a flow guiding mechanism 102 at the first end of the cover 10. The fluid can flow spirally forward from the first end of the cover 10 into the cover 10 under the action of the flow guiding mechanism 102 to form a swirling flow field, providing sufficient shear force to remove large-diameter bubbles and promote the separation of bubbles from the liquid phase fluid.

[0037] Furthermore, due to the density difference between gas and liquid / solid, gas has a relatively lower density. In the swirling flow field, gas will accumulate in the central region of the cover 10, while liquid and solid are more likely to move towards the edge of the cover 10. This helps to reasonably balance the problem of excessive energy in the central region during fluid movement, and avoids the phenomenon of "boiling over" when large-diameter bubbles in the central region leave the liquid, causing large bubbles to break into small bubbles, thus enabling gas to be efficiently separated from liquid and solid.

[0038] The flow guiding mechanism 102 is disposed at the first end of the cover 10. The flow guiding mechanism 102 can be in the form of a flow guiding groove, flow guiding rib, flow guiding plate, etc., or it can be a blade that can rotate under the drive of the driving device. It can make the fluid flow forward in a spiral shape from the first end of the cover 10 into the cover 10 and form a swirling flow field. Optionally, the first end of the cover 10 can be connected to a flow guiding cylinder, and the flow guiding mechanism 102 can be disposed on the inner wall of the flow guiding cylinder to enhance the flow guiding effect of the fluid and generate a larger shear force.

[0039] The bubble separation device provided by the present invention has a cover 10 with multiple through holes 101, which serve as microchannels for fluid. Small-diameter bubbles in the fluid enter the through holes 101, where they collide and coalesce, forming larger-diameter bubbles at the opening of the through holes 101 near the second end of the cover 10. By setting a flow guiding mechanism 102 at the first end of the cover 10, the fluid flows spirally forward into the cover 10 from the first end to form a swirling flow field, providing sufficient shear force to detach the large-diameter bubbles at the opening, effectively removing bubbles from the fluid, achieving efficient separation of gas from liquid and solid phases, and enhancing the degassing effect.

[0040] Furthermore, the flow guiding mechanism 102 includes multiple flow guiding vanes, which are distributed at intervals on the inner wall of the first end.

[0041] In a specific embodiment, such as Figure 1 As shown, the flow guiding mechanism 102 includes five flow guiding vanes, which are distributed at intervals on the inner wall of the first end of the cover 10 to guide the fluid to flow spirally from the first end of the cover 10 into the cover 10.

[0042] The guide vane can be set to be arc-shaped or flat, and the guide vane can also be set to be tilted relative to the central axis of the cover 10 to improve the guiding effect.

[0043] Specifically, the guide vane gradually twists from its root to its end in a direction perpendicular to the central axis of the cover 10 to form a curved guide surface.

[0044] The root of the guide vane is the part close to the inner wall of the first end of the cover 10, and the end of the guide vane is the part away from the inner wall of the first end of the cover 10.

[0045] In one embodiment, the side of the guide vane near the second end of the cover 10 is inclined relative to the central axis of the cover 10. Specifically, the angle between the side of the guide vane near the second end of the cover 10 and the central axis of the cover 10 is 10° to 60°. Preferably, the angle between the side of the guide vane near the second end of the cover 10 and the central axis of the cover 10 is 30° to 45°, forming a twisted and curved guide surface to guide the fluid to flow spirally from the first end of the cover 10 into the cover 10.

[0046] For example, the ratio of the extension length of the guide vane to the radius of the first end of the cover 10 is 1:5 to 1:1. Preferably, the ratio of the extension length of the guide vane to the radius of the first end of the cover 10 is 1:4 to 1:3, so as to avoid obstructing the fluid and reducing the flow rate of the fluid.

[0047] Furthermore, multiple through holes 101 are distributed parallel to each other on the cover 10, and the central axis of the multiple through holes 101 is parallel to the central axis of the cover 10.

[0048] Multiple through holes 101 are arranged in an array or randomly on the cover 10, for example Figure 1 As shown, multiple through holes 101 are evenly distributed on the cover 10, forming a ring array.

[0049] Furthermore, the total opening area of ​​the multiple through holes 101 accounts for 50% to 95% of the total inner wall area of ​​the cover 10. Preferably, the total opening area of ​​the multiple through holes 101 accounts for 75% to 90% of the total inner wall area of ​​the cover 10. The large proportion of the total opening area of ​​the multiple through holes 101 in the cover 10 is beneficial for bubbles to pass through the through holes 101 and achieve aggregation and separation.

[0050] Specifically, the opening diameter at the first end of the cover 10 is 10% to 30% of the opening diameter at the second end.

[0051] like Figure 3 As shown, the present invention also provides a three-phase separator, including a first housing 2, a second housing 3, and a bubble separation device 1 as provided in any of the above embodiments.

[0052] The first housing 2 is housed within the second housing 3. The second housing 3 includes an inlet 31 and an outlet 32. The first housing 2 has openings at both ends. The bubble separation device 1 is disposed within the first housing 2 and located at the end of the first housing 2 away from the inlet 31. The second end (i.e., the large-diameter end) of the bubble separation device 1 faces the side away from the inlet 31. The outer wall surface of the first housing 2 and the inner wall surface of the second housing 3 are spaced apart.

[0053] Both the first housing 2 and the second housing 3 are hollow structures. The inlet 31 is located at the end of the second housing 3, and the outlet 32 ​​is located on the side wall of the second housing 3 and is relatively perpendicular to the side wall of the second housing 3.

[0054] The first housing 2 is a cylindrical structure with openings at both ends. Preferably, the first housing 2 and the second housing 3 are coaxially arranged. The first housing 2 is fixed inside the second housing 3 by a support member with a hollow structure, such as a bracket.

[0055] like Figure 3As shown, under normal operating conditions of the three-phase separator, the central axis of the second shell 3 is parallel to the vertical direction, and the feed inlet 31 is located at the bottom for connection with the reactor. Fluid enters the second shell 3 through the feed inlet 31 and gradually rises into the first shell 2. Under the action of the bubble separator 1 at the end of the first shell 2 furthest from the feed inlet 31, bubbles in the fluid are removed. The liquid and solid phases either flow out of the first shell 2 along the annular gap between the first shell 2 and the second shell 3, or leave the bubble separator 1 under the action of the swirling flow field and flow out of the first shell 2. The liquid and solid phases flowing out of the first shell 2 are separated. The solid phase gradually settles near the bottom of the second shell 3 and flows back into the reactor through the feed inlet 31. The liquid level gradually rises and flows out from the discharge outlet 32, achieving gas-liquid-solid three-phase separation.

[0056] By setting a bubble separation device 1 at the end of the first housing 2 away from the feed inlet 31, it helps to efficiently remove gas from the fluid and achieve efficient separation of gas from liquid and solid phase fluids.

[0057] The bubble separation device 1 is spaced apart from the inner wall of the first housing 2 to avoid increasing the pressure drop of the fluid and affecting the working efficiency of the three-phase separator. The bubble separation device 1 is fixed to the inner wall of the first housing 2 by a support member with a hollow structure, such as a bracket. Optionally, a flow guiding element can be provided between the bubble separation device 1 and the inner wall of the first housing 2 to further remove bubbles from the fluid flowing out of the gap between the bubble separation device 1 and the first housing 2, thereby enhancing the degassing effect.

[0058] The three-phase separator provided by the present invention has multiple through holes 101 in the cover 10, which serve as microchannels for fluid. Small-diameter bubbles in the fluid enter the through holes 101, where they collide and coalesce, forming larger-diameter bubbles at the opening of the through holes 101 near the second end of the cover 10. By setting a flow guiding mechanism 102 at the first end of the cover 10, the fluid flows spirally forward into the cover 10 from the first end to form a swirling flow field, providing sufficient shear force to remove the large-diameter bubbles at the opening, thus effectively removing bubbles from the fluid and achieving efficient separation of gas, liquid, and solid phases, enhancing the degassing effect.

[0059] Furthermore, the first housing 2 includes a body 21 and a first guide portion 22 coaxially connected. The first guide portion 22 is located at one end of the first housing 2 near the feed inlet 31, and the inner diameter of the first guide portion 22 gradually increases along its own axial direction toward the feed inlet 31.

[0060] The second housing 3 includes a second flow guide 33, which is disposed between the feed inlet 31 and the discharge outlet 32. The inner diameter of the second flow guide 33 gradually increases along the direction from the feed inlet 31 to the discharge outlet 32.

[0061] The outer wall surface of the first guide section 22 and the inner wall surface of the second guide section 33 are spaced apart.

[0062] like Figure 3 As shown, the body 21 of the first housing 2 is cylindrical, and the first guide part 22 is conical and connected to the end of the body 21 near the feed inlet 31. The first guide part 22 gradually expands outward in a trumpet shape. The fluid flowing in from the feed inlet 31 gradually converges to the body 21 and flows to the bubble separation device 1 under the guidance of the first guide part 22.

[0063] The second housing 3 includes two cylindrical bodies and a second guide section 33 connected between the two bodies. The inner diameter of the upper body is larger than that of the lower body. The second guide section 33 is a tapered cylinder with a gradually narrowing inner diameter. Its large diameter end is connected to the upper body and its small diameter end is connected to the lower body.

[0064] The first guide section 22 is at least partially located within the space enclosed by the second guide section 33. Under the dual guiding action of the first guide section 22 and the second guide section 33, the fluid gradually converges to the body 21 and flows to the bubble separation device 1.

[0065] Furthermore, the three-phase separator also includes a third housing 4, which is housed within the second housing 3. The third housing 4 has an opening at one end near the discharge port 32, and the first housing 2 is at least partially located within the third housing 4. Specifically, the body 21 of the first housing 2 is at least partially located within the third housing 4.

[0066] The outer wall of the first housing 2 is spaced apart from the inner wall of the third housing 4, and the outer wall of the third housing 4 is spaced apart from the inner wall of the second housing 3.

[0067] The third shell 4 is cylindrical and coaxially arranged with the first shell 2 and the second shell 3. The third shell 4 is open at least at one end near the feed inlet 31. The space between the first shell 2 and the third shell 4 forms a liquid-solid two-phase fluid region, and the space between the third shell 4 and the second shell 3 forms a liquid phase fluid region.

[0068] After passing through the bubble separator 1, the degassed fluid flows from the upper end of the main body 21 into the space between the first shell 2 and the third shell 4. As the fluid falls, the solid phase fluid gradually deposits in the space between the third shell 4 and the second shell 3, and gradually flows back into the reactor along the gap between the first guide section 22 and the second guide section 33. Meanwhile, the liquid phase fluid gradually rises in the space between the third shell 4 and the second shell 3 until it reaches the height of the discharge port 32, and flows out from the discharge port 32. The three-phase separator completes the separation of the gas, liquid and solid phases.

[0069] Furthermore, the third housing 4 includes a third flow guide 41, which is located at the end of the third housing 4 away from the feed inlet 31. The inner diameter of the third flow guide 41 gradually increases along its own axial direction away from the feed inlet 31.

[0070] like Figure 3 As shown, the upper end of the third housing 4 is provided with a gradually expanding third guide section 41. The third guide section 41 is trumpet-shaped, and its inner diameter gradually increases from the direction close to the feed inlet 31 to the direction away from the feed inlet 31.

[0071] By setting the third guide section 41, the fluid flowing out from the first housing 2 flows into the space enclosed by the third guide section 41. Under the action of the inclined inner wall of the third guide section 41, it can flow downward quickly and flow out from the space between the first housing 2 and the third housing 4, which helps to improve the working efficiency of the three-phase separator.

[0072] Furthermore, the end of the first housing 2 away from the feed inlet 31 is provided with a plurality of guide slits. The guide slits extend along the length of the first housing 2, and the plurality of guide slits are distributed at intervals around the central axis of the first housing 2, so that the end of the first housing 2 away from the feed inlet 31 is comb-shaped.

[0073] Specifically, the wall of the first shell 2 away from the feed inlet 31 is provided with multiple gaps to form a flow guide slit. The multiple flow guide slits are distributed at intervals, so that the end of the first shell 2 away from the feed inlet 31 is comb-shaped, so that large bubbles in the fluid are separated out as they flow through the flow guide slits, preventing large-diameter bubbles from flowing out from the gap between the first shell 2 and the third shell 4 and entering the liquid-solid two-phase fluid region.

[0074] The shape of the guide slits can be rectangular, U-shaped, etc., and this invention does not impose specific limitations. The width of the guide slits is 2mm to 5mm, and the sum of the widths of the guide slits accounts for 50% to 90% of the circumferential length of the end of the first shell 2 away from the feed inlet 31, ensuring the separation effect of large-diameter bubbles.

[0075] Furthermore, the bottom end of the guide slit is located away from the feed inlet 31 relative to the second end of the bubble separator 1. That is, in Figure 3 In the three-phase separator shown, the bottom of the guide slit is higher than the uppermost edge of the bubble separation device, so that small-diameter bubbles in the fluid flowing in from the feed inlet 31 flow through the bubble separation device to form large-diameter bubbles, preventing small-diameter bubbles from directly entering the gap between the first shell 2 and the third shell 4 through the guide slit.

[0076] Furthermore, by setting the bottom end of the guide slit to be located away from the feed inlet 31 relative to the second end of the bubble separation device 1, it is possible not only to separate large-diameter bubbles in the fluid flowing in from the feed inlet 31, but also to separate and remove large-diameter bubbles formed by the aggregation of small-diameter bubbles through the bubble separation device 1, thereby fully removing bubbles and achieving efficient separation of gas from liquid and solid phases.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bubble separation device, characterized in that, Includes a cover, the cover having openings at both ends, and the inner diameter of the cover gradually increasing from the first end to the second end; The cover is provided with multiple through holes, and the first end is provided with a flow guiding mechanism. The flow guiding mechanism is used to guide the fluid to flow forward in a spiral shape from the first end into the cover to form a swirling flow field.

2. The bubble separation device according to claim 1, characterized in that, The flow guiding mechanism includes multiple flow guiding plates, which are distributed at intervals on the inner wall of the first end.

3. The bubble separation device according to claim 2, characterized in that, The guide vane gradually twists from its root to its end in a direction perpendicular to the central axis of the cover to form a curved guide surface.

4. The bubble separation device according to claim 1, characterized in that, The multiple through holes are distributed parallel to each other at intervals on the cover, and the central axis of the multiple through holes is parallel to the central axis of the cover.

5. The bubble separation device according to claim 1, characterized in that, The total area of ​​the openings of the plurality of through holes accounts for 50% to 95% of the total area of ​​the inner wall of the cover.

6. The bubble separation device according to claim 1, characterized in that, The opening diameter of the first end accounts for 10% to 30% of the opening diameter of the second end.

7. A three-phase separator, characterized in that, It includes a first housing, a second housing, and a bubble separation device as described in any one of claims 1 to 6; The first housing is housed within the second housing, which includes an inlet and an outlet. The inlet is located at one end of the second housing, and the outlet is located on the side wall of the second housing and is perpendicular to the side wall of the second housing. The first housing has openings at both ends. The bubble separation device is disposed within the first housing and located at the end of the first housing away from the inlet. The second end of the bubble separation device faces the side away from the inlet. The outer wall surface of the first housing is spaced apart from the inner wall surface of the second housing.

8. The three-phase separator according to claim 7, characterized in that, The three-phase separator further includes a third housing, which is housed within the second housing. The third housing has an opening at one end near the discharge port, and the first housing is at least partially located within the third housing. The outer wall surface of the first housing is spaced apart from the inner wall surface of the third housing, and the outer wall surface of the third housing is spaced apart from the inner wall surface of the second housing.

9. The three-phase separator according to claim 8, characterized in that, The first housing has a plurality of guide slits at the end away from the feed inlet. The guide slits extend along the length of the first housing and are spaced apart around the central axis of the first housing, so that the end of the first housing away from the feed inlet is comb-shaped.

10. The three-phase separator according to claim 9, characterized in that, The bottom end of the guide slit is located away from the feed inlet relative to the second end of the bubble separation device.

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