A two-stage cyclone oil-water separation device

Abstract

The application relates to a two-stage cyclone oil-water separation device which comprises a first cyclone cylinder, a second cyclone cylinder, an overflow pipe, a first driving assembly and a second driving assembly; the first cyclone cylinder is internally provided with a first cyclone cavity; the second cyclone cylinder is internally provided with a second cyclone cavity, and the second cyclone cylinder is movably sleeved with the first cyclone cylinder; the overflow pipe comprises a movable section and a fixed section which are connected with each other, the movable section is rotationally connected with the first cyclone cylinder, and the fixed section is connected with the second cyclone cylinder; the first driving assembly is connected with the first cyclone cylinder; and the second driving assembly is connected with the overflow pipe. The two-stage cyclone purification device and process are realized, the volume weight and the floor area of the device are saved, the energy consumption is saved, the cyclone intensity in the first cyclone cavity and the second cyclone cavity is improved, the rotating speed can be changed to effectively adapt to the sway working condition of the FPSO, and the purification and separation effect of the oil-water separation device is improved.

Description

Technical Field

[0001] This invention relates to the field of petroleum purification technology, and in particular to a two-stage cyclone oil-water separator. Background Technology

[0002] Efficient and economical oil-water separation technology has significant application value in many fields. Advanced oil-water separation technology can significantly reduce the excessive energy consumption in oil extraction, thereby improving related energy and cost issues; advanced oil-water separation technology will also benefit the improvement of marine ecology; similarly, oil-water separation in industrial and domestic wastewater treatment is also a challenge, and advanced treatment methods can control pollution, reduce costs, and promote the recycling of resources.

[0003] Currently, common offshore oil and gas field development methods include production platform + subsea pipeline, production platform + export tanker, FPSO + subsea pipeline, and FPSO + export tanker. Floating Production Storage and Offloading (FPSO) units are used for the preliminary processing and storage of crude oil. They possess unique advantages such as wide applicability, high degree of functional integration, and reusability, and have become the mainstream production unit for offshore oil and gas field development. The oil, gas, and water treatment module is a key module in FPSO construction and production. It is mainly used to gradually separate and recover oil, light hydrocarbons dissolved in the oil under high pressure, and production wastewater, primarily including oil-gas separation and oil-water separation processes.

[0004] Currently, most commonly used oil-water separators employ passive cyclone technology, which relies on the swirling of the liquid flow or spiral blades to convert axial velocity into tangential velocity, thereby separating oil and water. However, due to the real-time changes in the oil content, flow rate, and pressure of wastewater, as well as the low stability caused by the sloshing conditions on FPSOs, passive cyclone technology struggles to meet treatment standards. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a two-stage cyclone oil-water separator that is suitable for FPSO oil-water separation conditions and improves oil-water separation efficiency.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A two-stage cyclone oil-water separator, comprising:

[0008] A first vortex tube, wherein a first vortex cavity is provided inside the first vortex tube, and a first helical blade is provided on the inner wall of the first vortex tube;

[0009] The second vortex tube has a second vortex cavity inside, and a second spiral blade is provided on the inner wall of the second vortex tube. The second vortex tube is movably sleeved on the first vortex tube.

[0010] An overflow pipe, comprising a movable section and a fixed section connected to each other, wherein the movable section is rotatably connected to the first vortex cylinder and communicates with the first vortex cavity, and the fixed section is connected to the second vortex cylinder and communicates with the second vortex cavity;

[0011] A first driving component is connected to the first cyclone drum and is used to drive the first cyclone drum to rotate about its central axis.

[0012] A second drive assembly, connected to the overflow pipe, is used to drive the overflow pipe to rotate about its central axis.

[0013] In one embodiment, the direction of rotation of the overflow pipe is opposite to the direction of rotation of the first vortex tube.

[0014] In one embodiment, a heating assembly is fitted onto the second vortex tube. The heating assembly includes a heating jacket disposed on the second vortex tube. The heating jacket has a heating fluid cavity, a heating liquid inlet communicating with the heating fluid cavity, and a heating liquid outlet.

[0015] In one embodiment, the secondary cyclone oil-water separator further includes a fluid heating element, which is connected to the oil outlet of the second cyclone cylinder and the heating liquid inlet, respectively.

[0016] In one embodiment, the first vortex cylinder includes an inlet cylinder and a rotating cylinder. The inlet cylinder is provided with a first inlet, and the rotating cylinder is provided with a first vortex chamber. The inlet cylinder is connected to the rotating cylinder. The rotating cylinder passes through the second vortex cylinder and is rotatably connected to the second vortex cylinder. The movable section extends into the rotating cylinder and is rotatably connected to the rotating cylinder.

[0017] In one embodiment, the first vortex cylinder further includes a liquid distributor connected to the liquid inlet cylinder body. The liquid distributor is located on the side of the movable section away from the rotating cylinder body, and the liquid distributor is connected to the first vortex cavity through multiple liquid inlet vertical pipes.

[0018] In one embodiment, the first vortex tube further includes an inlet ring pipe, which is sleeved on the overflow pipe and is connected to the inlet vertical pipe and the first vortex cavity respectively.

[0019] In one embodiment, the inlet ring pipe is provided with a plurality of spray holes, and the angle between the central axis of the spray holes and the diameter direction of the inlet ring pipe is 30° to 60°.

[0020] In one embodiment, the first drive assembly includes a first rotary motor, two first reducers, two first transmission wheels, and two first transmission belts. The two ends of the first rotary motor are respectively connected to the two first reducers, and the first reducers are connected to the first transmission wheels in a one-to-one correspondence. The two ends of the rotating cylinder are respectively connected to the first transmission wheels via the first transmission belts.

[0021] In one embodiment, the second drive assembly includes a second rotating motor, a second reducer, and a second drive wheel connected in sequence, the second drive wheel being connected to the movable section of the overflow pipe via a second drive belt.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. The aforementioned two-stage cyclone oil-water separator is equipped with an overflow pipe, a first cyclone, and a second cyclone. During operation, wastewater first enters the first cyclone. In the first cyclone chamber, the overflow pipe and the rotation of the first cyclone cause the wastewater to form a cyclone, thus producing primary oil and primary wastewater. The primary oil then enters the second cyclone for secondary cyclone purification via the overflow pipe. In the second cyclone chamber, the rotation of the first cyclone causes the primary oil to form a cyclone, ultimately yielding finished oil and secondary wastewater. Furthermore, the first drive assembly can drive the first cyclone to rotate around its central axis, and the second drive assembly... The component drives the overflow pipe to rotate around its central axis. The rotation speed of the first cyclone and the overflow pipe can be adjusted according to the flow rate and pressure of the production wastewater. Therefore, the two-stage cyclone oil-water separator realizes a two-stage cyclone purification process. Through the interlocking overflow pipe, first cyclone, and second cyclone, the structure not only saves the weight, volume, and floor space of the device, but also improves the cyclone intensity in the first and second cyclone chambers. At the same time, the first and second drive components actively drive the first cyclone and the overflow pipe, which can change the rotation speed to effectively adapt to the swaying conditions of the FPSO, thereby improving the purification and separation effect of the oil-water separator.

[0024] 2. The oil-water separator is configured such that the overflow pipe rotates in the opposite direction to the first cyclone separator. When the speed remains constant, the swirling intensity in the first cyclone chamber is greater when the overflow pipe and the first cyclone separator rotate in opposite directions than when they rotate in the same direction, which effectively saves energy and improves the oil-water separation efficiency.

[0025] 3. The second cyclone is equipped with a heating component, which, combined with the structural features of the first and second cyclone, can not only heat the primary oil in the second cyclone, but also heat the production wastewater in the first cyclone. At the same time, it improves the oil-water separation efficiency in the first and second cyclone and effectively saves heating energy consumption.

[0026] 4. Furthermore, since the heating component adopts a fluid heating method, the heating fluid chamber can be directly connected to the second vortex chamber. That is, the finished oil produced by the purification of the second vortex chamber can be used to heat the first and second vortex chambers, which can effectively recover the residual heat in the finished oil and reduce heating energy consumption.

[0027] 5. The first vortex cylinder adopts an interconnected inlet cylinder and a rotating cylinder. The inlet cylinder is connected to the first vortex chamber of the rotating cylinder through a liquid separator and an inlet vertical pipe, realizing the rotational connection between the rotating cylinder and the second vortex cylinder, as well as the rotational connection between the movable section of the overflow pipe and the rotating cylinder, thus avoiding interference between the rotation of the overflow pipe and the rotation of the first vortex cylinder, which would affect the rotation effect.

[0028] 6. The first drive assembly is equipped with a first reducer, which can adjust the rotation speed of the rotating cylinder in a timely manner, and is connected to both ends of the rotating cylinder through the first transmission belt, making the rotation of the rotating cylinder more stable and reliable, and effectively improving the controllability of the rotation of the rotating cylinder.

[0029] 7. The second drive assembly is equipped with a second reducer, which can adjust the speed of the moving section of the overflow pipe in a timely manner, and is connected to the moving section of the overflow pipe through a second transmission belt, effectively improving the transmission efficiency of the second drive assembly. Attached Figure Description

[0030] Figure 1 This is a perspective view of the oil-water separation device of the present invention.

[0031] Figure 2 This is a top view of the oil-water separation device in this invention.

[0032] Figure 3 For the oil-water separation device in this invention Figure 2 Sectional view at (AA).

[0033] Figure 4 For the oil-water separation device in this invention Figure 2 Sectional view at (BB).

[0034] Reference numerals: 100, oil-water separator; 10, first cyclone separator; 11, first cyclone chamber; 12, first helical blade; 13, inlet cylinder; 131, first inlet; 14, rotating cylinder; 141, first outlet; 15, distributor head; 16, inlet vertical pipe; 17, inlet ring pipe; 18, fourth helical blade; 20, second cyclone separator; 21, second cyclone chamber; 22, second helical blade; 23, second inlet; 24, second oil outlet; 25, second outlet; 26, first bearing; 30, overflow pipe; 31 31. Moving section; 32. Fixed section; 33. First oil outlet; 34. Third spiral blade; 35. Fluid pump; 36. Second bearing; 40. First drive assembly; 41. First rotating motor; 42. First reducer; 43. First transmission wheel; 44. First transmission belt; 50. Second drive assembly; 51. Second rotating motor; 52. Second reducer; 53. Second transmission wheel; 54. Second transmission belt; 60. Heating assembly; 61. Heating jacket; 62. Heating fluid chamber; 63. Heating liquid inlet; 64. Heating liquid outlet. Detailed Implementation

[0035] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0036] The following describes in detail, with reference to the accompanying drawings, a two-stage cyclone oil-water separator 100 in some embodiments.

[0037] like Figures 1 to 4 As shown, in one embodiment, a two-stage cyclone oil-water separator 100 is provided, including a first cyclone cylinder 10, a second cyclone cylinder 20, an overflow pipe 30, a first drive assembly 40, and a second drive assembly 50;

[0038] The first swirl tube 10 has a first swirl chamber 11 inside, and a first helical blade 12 is provided on the inner wall of the first swirl tube 10; the second swirl tube 20 has a second swirl chamber 21 inside, and a second helical blade 22 is provided on the inner wall of the second swirl tube 20; the second swirl tube 20 is movably sleeved on the first swirl tube 10; the overflow pipe 30 includes a movable section 31 and a fixed section 32 connected to each other; the movable section 31 is rotatably connected to the first swirl tube 10 and communicates with the first swirl chamber 11; the fixed section 32 is connected to the second swirl tube 20 and communicates with the second swirl chamber 21.

[0039] Furthermore, the first drive assembly 40 is connected to the first vortex tube 10 and is used to drive the first vortex tube 10 to rotate around its central axis; the second drive assembly 50 is connected to the overflow pipe 30 and is used to drive the overflow pipe 30 to rotate around its central axis.

[0040] The aforementioned two-stage cyclone oil-water separator 100 is equipped with an overflow pipe 30, a first cyclone cylinder 10, and a second cyclone cylinder 20 that are nested together. During operation, wastewater first enters the first cyclone cylinder 10. In the first cyclone chamber 11, the overflow pipe 30 and the rotation of the first cyclone cylinder 10 cause the wastewater to form a cyclone, thus producing primary oil and primary wastewater within the first cyclone chamber 11. The primary oil then passes through the overflow pipe 30 into the second cyclone cylinder 20 for secondary cyclone purification. In the second cyclone chamber 21, the rotation of the first cyclone cylinder 10 causes the primary oil to form a cyclone, ultimately yielding finished oil and secondary wastewater. Furthermore, the first drive assembly 40 can drive the first cyclone cylinder 10 to rotate around its central axis. The second drive assembly 50 drives the overflow pipe 30 to rotate around its central axis. The rotation speed of the first cyclone cylinder 10 and the overflow pipe 30 can be adjusted according to the flow rate and pressure of the production wastewater. Therefore, the two-stage cyclone oil-water separator 100 realizes a two-stage cyclone purification process. Through the interlocking overflow pipe 30, the first cyclone cylinder 10, and the second cyclone cylinder 20, not only is the footprint of the device saved, but the cyclone intensity in the first cyclone chamber 11 is also improved. At the same time, the first drive assembly 40 and the second drive assembly 50 actively drive the first cyclone cylinder 10 and the overflow pipe 30, which can change the rotation speed to effectively adapt to the swaying conditions of the FPSO, thereby improving the purification and oil-water separation effect of the oil-water separator 100.

[0041] Specifically, such as Figures 1 to 4 As shown, in one embodiment, the first vortex tube 10 is provided with a first liquid inlet 131 and a first liquid outlet 141, and the overflow pipe 30 is provided with a first oil outlet 33. The first liquid inlet 131 is located on the top wall of the first vortex tube 10, the first liquid outlet 141 is located on the bottom wall of the first vortex tube 10, and the first oil outlet 33 is located at the bottom of the movable section 31 of the overflow pipe 30. Therefore, after the production wastewater enters the first vortex chamber 11 through the first liquid inlet 131, it vortexes to produce primary oil and primary wastewater. The primary oil flows out of the first vortex chamber 11 through the first oil outlet 33, and the primary wastewater flows out of the first vortex chamber 11 through the first liquid outlet 141.

[0042] The second cyclone 20 is provided with a second liquid inlet 23, a second oil outlet 24, and a second liquid outlet 25. The second liquid inlet 23 is located at the bottom end of the side wall of the second cyclone 20, and the second oil outlet 24 and the second liquid outlet 25 are both located at the top end of the side wall of the second cyclone 20. The setting height of the second oil outlet 24 is greater than that of the second liquid outlet 25. The fixed section 32 of the overflow pipe 30 is connected to the second liquid inlet 23. The first-grade oil enters the second cyclone chamber 21 through the overflow pipe 30 and the second liquid inlet 23. The finished oil and the secondary wastewater are separated in the second cyclone chamber 21 by rotation. The finished oil flows out of the second cyclone chamber 21 through the second oil outlet 24, and the secondary wastewater flows out of the second cyclone chamber 21 through the second liquid outlet 25.

[0043] Specifically, in one embodiment, the movable section 31 and the fixed section 32 of the overflow pipe 30 are connected by a rotating drum, and a rotating bearing is provided between the rotating drum and the movable section 31 to ensure the sealing and rotatability of the connection.

[0044] Specifically, such as Figure 1 and Figure 4 As shown, in one embodiment, the overflow pipe 30 is equipped with a fluid pump 35 for pumping first-grade oil from the first swirling chamber 11 into the second swirling chamber 21.

[0045] Specifically, such as Figure 3 and Figure 4 As shown, in one embodiment, the outer wall of the overflow pipe 30 is provided with a third spiral blade 34, and the outer wall of the first vortex cylinder 10 is provided with a fourth spiral blade 18. Therefore, the first spiral blade 12 and the third spiral blade 34 are arranged opposite to each other to create a vortex for the production wastewater in the first vortex chamber 11, and the second spiral blade 22 and the fourth spiral blade 18 are arranged opposite to each other to form a vortex for the primary oil in the second vortex chamber 21. This is beneficial to improve the vortex intensity in the first vortex chamber 11 and the second vortex chamber 21, thereby improving the efficiency of the two-stage oil-water separation and the oil-water separation effect.

[0046] In this specific embodiment, the first helical blade 12 on the inner wall of the first vortex tube 10 has a radius of 10-50 mm and a pitch ratio of 2:1. The third helical blade 34 on the outer wall of the overflow pipe 30 has a diameter of 1 / 2 to 3 / 4 of the inner diameter of the rotating cylinder 14, a pitch ratio of 2:1, and a thickness of 5 mm. The second helical blade 22 on the inner wall of the second vortex tube 20 has a diameter of 3 / 4 to 4 / 5 of the inner diameter of the second vortex tube 20 and is located at the lower 1 / 2 of the second vortex tube 20. The fourth helical blade 18 on the outer wall of the first vortex tube 10 has a diameter of 3 / 4 to 4 / 5 of the inner diameter of the second vortex tube 20 and a thickness of 5 mm.

[0047] Specifically, in one embodiment, the rotation direction of the overflow pipe 30 is opposite to the rotation direction of the first vortex cylinder 10. By setting the overflow pipe 30 to rotate in the opposite direction to the first vortex cylinder 10, the vortex intensity in the first vortex chamber 11 is greater when the overflow pipe 30 and the first vortex cylinder 10 rotate in opposite directions, even with a constant rotation speed. This effectively saves energy and improves the oil-water separation efficiency.

[0048] Specifically, such as Figure 3 and Figure 4As shown, in one embodiment, a heating assembly 60 is fitted onto the second vortex cylinder 20. The heating assembly 60 includes a heating jacket 61 disposed on the second vortex cylinder 20. The heating jacket 61 is provided with a heating fluid cavity 62, a heating liquid inlet 63 communicating with the heating fluid cavity 62, and a heating liquid outlet 64. The heating liquid inlet 63 is connected to the oil outlet of the second vortex cylinder 20.

[0049] The second cyclone 20 is fitted with a heating component 60, which, combined with the structural features of the first cyclone 10 and the second cyclone 20, can not only heat the primary oil in the second cyclone 20, but also heat the production wastewater in the first cyclone 10, thereby improving the oil-water separation efficiency in the first cyclone 10 and the second cyclone 20 and effectively saving heating energy consumption.

[0050] Furthermore, such as Figure 3 and Figure 4 As shown, in one embodiment, the two-stage cyclone oil-water separator 100 further includes a fluid heating element, which is connected to the oil outlet of the second cyclone cylinder 20 and the heating liquid inlet 63, respectively. The heating liquid outlet 64 is connected to the fluid heating element to realize the recycling of the heated fluid. The heating temperature of the fluid heating element is 80-120℃.

[0051] Furthermore, since the heating component 60 adopts a fluid heating method, the heating fluid cavity 62 can be directly connected to the second vortex cavity 21. That is, the finished oil purified by the second vortex cylinder 20 is used to heat the first vortex cylinder 10 and the second vortex cylinder 20, which can effectively recover the residual heat in the finished oil and reduce heating energy consumption.

[0052] Specifically, such as Figure 1 and Figure 3 As shown, in one embodiment, the first vortex cylinder 10 includes an inlet cylinder 13 and a rotating cylinder 14. The inlet cylinder 13 is provided with a first inlet port 131, and the rotating cylinder 14 is provided with a first vortex chamber 11. The inlet cylinder 13 and the rotating cylinder 14 are connected. The rotating cylinder 14 passes through the second vortex cylinder 20 and is rotatably connected to the second vortex cylinder 20. The movable section 31 of the overflow pipe 30 extends into the rotating cylinder 14 and is rotatably connected to the rotating cylinder 14.

[0053] Furthermore, such as Figure 3 As shown, in one embodiment, the first vortex cylinder 10 further includes a liquid distributor 15 connected to the liquid inlet cylinder 13. The liquid distributor 15 is located on the side of the movable section 31 of the overflow pipe 30 away from the rotating cylinder 14. The liquid distributor 15 is connected to the first vortex cavity 11 through multiple liquid inlet vertical pipes 16.

[0054] The first vortex cylinder 10 uses an inlet cylinder 13 and a rotating cylinder 14 that are interconnected. The inlet cylinder 13 is connected to the first vortex chamber 11 of the rotating cylinder 14 through a liquid separator 15 and an inlet vertical pipe 16, which realizes the rotational connection between the rotating cylinder 14 and the second vortex cylinder 20, as well as the rotational connection between the movable section 31 of the overflow pipe 30 and the rotating cylinder 14. This avoids the rotation of the overflow pipe 30 and the rotation of the first vortex cylinder 10 from interfering with each other and affecting the rotation effect.

[0055] In this specific embodiment, a second bearing 36 is provided between the movable section 31 of the overflow pipe 30 and the rotating cylinder 14 to ensure smooth rotation. The upper end of the rotating cylinder 14 is provided with a first end cap, and the liquid inlet vertical pipe 16 passes through the first end cap and communicates with the liquid inlet ring pipe 17.

[0056] Furthermore, first bearings 26 are respectively provided between the two ends of the rotating cylinder 14 and the second vortex cylinder 20 to ensure the rotation of the rotating cylinder 14; second end caps are respectively provided at both ends of the second vortex cylinder 20 to seal the first bearings 26.

[0057] Furthermore, such as Figure 3 and Figure 4 As shown, in one embodiment, the first vortex tube 10 further includes an inlet ring pipe 17, which is sleeved on the overflow pipe 30 and is connected to the inlet vertical pipe 16 and the first vortex chamber 11 respectively.

[0058] In this specific embodiment, the liquid inlet ring pipe 17 is provided with a plurality of spray holes, and the angle between the central axis of the spray holes and the diameter direction of the liquid inlet ring pipe 17 is 30° to 60°.

[0059] The liquid inlet cylinder 13 is connected to the rotating cylinder 14 through the liquid separator 15, the liquid inlet vertical pipe 16, and the liquid inlet ring pipe 17. After the liquid reaches the liquid inlet ring pipe 17 through the liquid inlet vertical pipe 16, the liquid inlet ring pipe 17 is provided with multiple spray nozzles at acute angles to the horizontal direction, which directly spray the production wastewater onto the inner wall of the rotating cylinder 14, preventing the production wastewater from flowing out directly, increasing the treatment time of the production wastewater in the first vortex chamber 11, and thus improving the oil-water separation effect.

[0060] Specifically, such as Figure 1 and Figure 3 As shown, in one embodiment, the first drive assembly 40 includes a first rotating motor 41, two first reducers 42, two first transmission wheels 43, and two first transmission belts 44. The two ends of the first rotating motor 41 are respectively connected to the first reducers 42, and the first reducers 42 are connected to the first transmission wheels 43 in a one-to-one correspondence. The two ends of the rotating cylinder 14 are respectively connected to the first transmission wheels 43 through the first transmission belts 44.

[0061] The first drive assembly 40 is equipped with a first reducer 42, which can adjust the rotation speed of the rotating cylinder 14 in a timely manner, and is connected to both ends of the rotating cylinder 14 through the first transmission belt 44, making the rotation of the rotating cylinder 14 more stable and reliable, and effectively improving the controllability of the rotation of the rotating cylinder 14.

[0062] Specifically, such as Figure 1 and Figure 4 As shown, in one embodiment, the second drive assembly 50 includes a second rotary motor 51, a second reducer 52, and a second transmission wheel 53 connected in sequence. The second transmission wheel 53 is connected to the movable section 31 of the overflow pipe 30 via a second transmission belt 54. The second drive assembly 50 includes a second reducer 52, which can adjust the rotational speed of the movable section 31 of the overflow pipe 30 in a timely manner. Furthermore, by connecting to the movable section 31 of the overflow pipe 30 via the second transmission belt 54, the transmission efficiency of the second drive assembly 50 is effectively improved.

[0063] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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.

[0064] Furthermore, the terms "first" and "second" 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.

[0065] 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 mechanical connection or an electrical connection; 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.

[0066] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0067] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0068] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A two-stage cyclone oil-water separator, characterized in that, include: A first swirling cylinder (10) is provided with a first swirling cavity (11) inside the first swirling cylinder (10), and a first spiral blade (12) is provided on the inner wall of the first swirling cylinder (10). The second vortex tube (20) is provided with a second vortex cavity (21) inside the second vortex tube (20), and a second spiral blade (22) is provided on the inner wall of the second vortex tube (20). The second vortex tube (20) is movably sleeved on the first vortex tube (10). An overflow pipe (30) includes a movable section (31) and a fixed section (32) connected to each other. The movable section (31) is rotatably connected to the first vortex cylinder (10) and communicates with the first vortex cavity (11). The fixed section (32) is connected to the second vortex cylinder (20) and communicates with the second vortex cavity (21). A first drive assembly (40) is connected to the first vortex tube (10) and is used to drive the first vortex tube (10) to rotate around its central axis. A second drive assembly (50) is connected to the overflow pipe (30) and is used to drive the overflow pipe (30) to rotate about its central axis.

2. The two-stage cyclone oil-water separator according to claim 1, characterized in that, The direction of rotation of the overflow pipe (30) is opposite to the direction of rotation of the first vortex tube (10).

3. The two-stage cyclone oil-water separator according to claim 1, characterized in that, A heating assembly (60) is fitted onto the second vortex tube (20). The heating assembly (60) includes a heating jacket (61) disposed on the second vortex tube (20). The heating jacket (61) is provided with a heating fluid cavity (62), a heating liquid inlet (63) communicating with the heating fluid cavity (62), and a heating liquid outlet (64).

4. The two-stage cyclone oil-water separator according to claim 3, characterized in that, The secondary cyclone oil-water separator also includes a fluid heating element, which is connected to the oil outlet of the second cyclone cylinder (20) and the heating liquid inlet (63).

5. A two-stage cyclone oil-water separator according to claim 1, characterized in that, The first vortex cylinder (10) includes an inlet cylinder (13) and a rotating cylinder (14). The inlet cylinder (13) is provided with a first inlet port (131). The rotating cylinder (14) is provided with a first vortex chamber (11). The inlet cylinder (13) is connected to the rotating cylinder (14). The rotating cylinder (14) passes through the second vortex cylinder (20) and is rotatably connected to the second vortex cylinder (20). The movable section (31) extends into the rotating cylinder (14) and is rotatably connected to the rotating cylinder (14).

6. A two-stage cyclone oil-water separator according to claim 5, characterized in that, The first vortex cylinder (10) also includes a liquid separator (15) connected to the liquid inlet cylinder (13). The liquid separator (15) is located on the side of the movable section (31) away from the rotating cylinder (14). The liquid separator (15) is connected to the first vortex cavity (11) through multiple liquid inlet vertical pipes (16).

7. A two-stage cyclone oil-water separator according to claim 6, characterized in that, The first vortex tube (10) also includes an inlet ring pipe (17), which is sleeved on the overflow pipe (30) and is connected to the inlet vertical pipe (16) and the first vortex chamber (11) respectively.

8. A two-stage cyclone oil-water separator according to claim 7, characterized in that, The liquid inlet ring pipe (17) is provided with a plurality of spray holes, and the angle between the central axis of the spray hole and the diameter direction of the liquid inlet ring pipe (17) is 30° to 60°.

9. A two-stage cyclone oil-water separator according to claim 5, characterized in that, The first drive assembly (40) includes a first rotating motor (41), two first reducers (42), two first transmission wheels (43), and two first transmission belts (44). The two ends of the first rotating motor (41) are respectively connected to the two first reducers (42). The first reducers (42) are connected to the first transmission wheels (43) in a one-to-one correspondence. The two ends of the rotating cylinder (14) are respectively connected to the first transmission wheels (43) through the first transmission belts (44).

10. A two-stage cyclone oil-water separator according to claim 1, characterized in that, The second drive assembly (50) includes a second rotating motor (51), a second reducer (52), and a second transmission wheel (53) connected in sequence. The second transmission wheel (53) is connected to the movable section (31) of the overflow pipe (30) via a second transmission belt (54).

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