Two-stage rotational flow oil-water separation device

Abstract

The invention relates to a two-stage rotational flow oil-water separation device which comprises a first rotational flow cylinder, a second rotational flow cylinder, an overflow pipe, a first driving assembly and a second driving assembly, a first rotational flow cavity is formed in the first rotational flow cylinder; a second rotational flow cavity is formed in the second rotational flow cylinder, and the first rotational flow cylinder is movably sleeved with the second rotational flow 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 rotational flow cylinder, and the fixed section is connected with the second rotational flow cylinder; the first driving assembly is connected with the first rotational flow cylinder; the second driving assembly is connected with the overflow pipe. The two-stage rotational flow purification device and process are achieved, the volume weight and the occupied area of the device are reduced, energy consumption is reduced, the rotational flow strength in the first rotational flow cavity and the second rotational flow cavity is improved, meanwhile, the rotating speed can be changed to effectively adapt to the oscillation working condition of the FPSO, and the purification and separation effects of the oil-water separation device are improved.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum purification, in particular to a two-stage cyclone oil-water separation device. Background Art

[0002] Efficient and economical oil-water separation technology has important application value in many fields. Advanced oil-water separation technology can significantly reduce the excessive energy consumption in the oil extraction process, thereby improving related energy and cost issues; marine oil pollution poses a major threat to human production and life, and advanced oil-water separation technology will be beneficial to the improvement of marine ecology; similarly, oil-water separation in industrial and domestic sewage treatment is also a common problem faced by all countries. Advanced treatment methods can control pollution, reduce costs, and promote the recycling of resources.

[0003] At present, the commonly used exploitation methods for offshore oil and gas fields include production platform + submarine pipeline, production platform + export tanker, FPSO + submarine pipeline, FPSO + export tanker, etc. Floating Production Storage and Offloading (FPSO) is used for preliminary processing and storage of crude oil. It has unique advantages such as wide application environment, high degree of functional integration and reusability. It has become the mainstream production device for offshore oil and gas field development at this stage. The oil, gas and water treatment module is a key module in the construction and production of FPSO. It is mainly used to gradually separate and recycle oil, light hydrocarbons dissolved in oil under high pressure environment and production wastewater, mainly including oil and gas separation and oil-water separation processes.

[0004] Currently, most commonly used oil-water separators use passive cyclones, which rely on the swirl of the liquid flow or spiral blades to convert the axial velocity into tangential velocity to separate the oil and water; however, due to the real-time changes in the oil content, flow rate and pressure of the sewage, as well as the low stability caused by the existence of sloshing conditions on the FPSO, it is difficult for passive cyclones to meet the treatment standards. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a two-stage cyclone oil-water separation device, which is suitable for FPSO oil-water separation conditions and improves the oil-water separation efficiency.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

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

[0008] A first cyclone tube, wherein a first cyclone chamber is provided in the first cyclone tube, and a first spiral blade is provided on an inner wall of the first cyclone tube;

[0009] A second cyclone tube, wherein a second cyclone chamber is provided in the second cyclone tube, a second spiral blade is provided on the inner wall of the second cyclone tube, and the second cyclone tube is movably sleeved on the first cyclone tube;

[0010] An overflow pipe, the overflow pipe comprising a movable section and a fixed section connected to each other, the movable section is rotatably connected to the first cyclone cylinder and communicated with the first cyclone chamber, the fixed section is connected to the second cyclone cylinder and communicated with the second cyclone chamber;

[0011] A first driving assembly, the first driving assembly is connected to the first cyclone drum and is used to drive the first cyclone drum to rotate around its central axis;

[0012] A second driving assembly is connected to the overflow pipe and is used to drive the overflow pipe to rotate around its central axis.

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

[0014] In one embodiment, a heating component is sleeved on the second cyclone cylinder, and the heating component includes a heating interlayer arranged on the second cyclone cylinder, and a heating fluid cavity, a heating liquid inlet and a heating liquid outlet connected to the heating fluid cavity are arranged in the heating interlayer.

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

[0016] In one embodiment, the first cyclone cylinder includes a liquid inlet cylinder and a rotating cylinder, the liquid inlet cylinder is provided with a first liquid inlet, the rotating cylinder is provided with a first cyclone chamber, the liquid inlet cylinder is communicated with the rotating cylinder, the rotating cylinder is penetrated in the second cyclone cylinder and is rotatably connected to the second cyclone cylinder, and the movable section extends into the rotating cylinder and is rotatably connected to the rotating cylinder.

[0017] In one embodiment, the first cyclone cylinder further includes a liquid separator connected to the liquid inlet cylinder body, the liquid separator is located on a side of the movable section away from the rotating cylinder body, and the liquid separator is connected to the first cyclone chamber through a plurality of liquid inlet vertical pipes.

[0018] In one of the embodiments, the first cyclone cylinder further includes a liquid inlet ring pipe, which is sleeved on the overflow pipe and is communicated with the liquid inlet vertical pipe and the first cyclone chamber respectively.

[0019] In one of the embodiments, a plurality of spray holes are provided on the liquid inlet ring tube, and an angle between a central axis of the spray hole and a diameter direction of the liquid inlet ring tube is 30° to 60°.

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

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

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

[0023] 1. The above-mentioned two-stage cyclone oil-water separation device is provided with an overflow pipe, a first cyclone cylinder, and a second cyclone cylinder which are mutually nested. During use, the production wastewater first enters the first cyclone cylinder, and in the first cyclone chamber, the overflow pipe and the first cyclone cylinder rotate to drive the production wastewater to form a cyclone, so that the production wastewater produces a first-class oil product and a first-class sewage in the first cyclone chamber, and the first-class oil product enters the second cyclone cylinder through the overflow pipe for secondary cyclone purification. In the second cyclone chamber, the first cyclone cylinder rotates to drive the first-class oil product to form a cyclone, and finally obtains finished oil and secondary sewage, and the first driving component can drive the first cyclone cylinder to rotate around its central axis, and the second driving component can drive the first cyclone cylinder to rotate around its central axis. The component drives the overflow pipe to rotate around its central axis, and the rotation speed of the first cyclone and the overflow pipe can be adjusted according to the flow rate and pressure of the produced wastewater; therefore, the two-stage cyclone oil-water separation device realizes a two-stage cyclone purification process, and the structural arrangement of the overflow pipe, the first cyclone and the second cyclone, which are nested with each other, not only saves the weight, volume and floor space of the device, but also improves the cyclone intensity in the first cyclone chamber and the second cyclone chamber. At the same time, the first cyclone and the overflow pipe are actively driven by the first drive component and the second drive component, and the rotation speed can be changed to effectively adapt to the sloshing condition of the FPSO, thereby improving the purification and separation effect of the oil-water separation device.

[0024] 2. The oil-water separation device sets the overflow pipe to rotate in the opposite direction to the first cyclone. When the rotation speed remains unchanged, when the overflow pipe and the first cyclone rotate in opposite directions, the cyclone intensity in the first cyclone chamber is greater than when the directions are the same, which effectively saves energy and improves the oil-water separation efficiency.

[0025] 3. A heating component is sleeved on the second cyclone, which, combined with the structural features of the first and second cyclone sleeves, can not only heat the first-grade oil in the second cyclone, but also heat the produced wastewater in the first cyclone, while improving the oil-water separation efficiency in the first and second cyclones, effectively saving 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 cyclone chamber, that is, the finished oil purified by the second cyclone cylinder is used to heat the first cyclone cylinder and the second cyclone cylinder, which can effectively recover the residual heat in the finished oil and reduce heating energy consumption.

[0027] 5. The first cyclone adopts a liquid inlet cylinder and a rotating cylinder that are interconnected. The liquid inlet cylinder is connected to the first cyclone chamber of the rotating cylinder through a liquid separator and a liquid inlet vertical pipe, thereby realizing a rotational connection between the rotating cylinder and the second cyclone, and a rotational connection between the movable section of the overflow pipe and the rotating cylinder, thereby avoiding interference between the rotation of the overflow pipe and the rotation of the first cyclone and affecting the rotation effect.

[0028] 6. The first drive assembly is provided with a first reducer, which can adjust the rotation speed of the rotating cylinder in time, and is respectively connected to the two ends of the rotating cylinder through a first transmission belt, so that the rotation of the rotating cylinder is more stable and reliable, and the controllability of the rotation of the rotating cylinder is effectively improved.

[0029] 7. A second reducer is provided in the second drive assembly, which can timely adjust the rotation speed of the active section of the overflow pipe and is connected to the active section of the overflow pipe through a second transmission belt, thereby effectively improving the transmission efficiency of the second drive assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional diagram of the oil-water separation device in the present invention.

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

[0032] Figure 3 The oil-water separation device of the present invention is Figure 2 Cross-sectional view at (AA).

[0033] Figure 4 The oil-water separation device of the present invention is Figure 2 Cross-sectional view at (BB).

[0034] Reference numerals: 100, oil-water separation device; 10, first cyclone; 11, first cyclone chamber; 12, first spiral blade; 13, liquid inlet cylinder; 131, first liquid inlet; 14, rotating cylinder; 141, first liquid outlet; 15, liquid separation head; 16, liquid inlet vertical pipe; 17, liquid inlet annular pipe; 18, fourth spiral blade; 20, second cyclone; 21, second cyclone chamber; 22, second spiral blade; 23, second liquid inlet; 24, second oil outlet; 25, second liquid outlet; 26, first bearing; 30, overflow pipe; 31 , movable 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 interlayer; 62, heating fluid cavity; 63, heating liquid inlet; 64, heating liquid outlet. DETAILED DESCRIPTION

[0035] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0036] A two-stage cyclone oil-water separation device 100 in some embodiments is described in detail below with reference to the accompanying drawings.

[0037] like Figures 1 to 4 As shown, in one embodiment, a two-stage cyclone oil-water separator 100 is provided, comprising 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 cyclone 10 is provided with a first cyclone chamber 11, and the inner wall of the first cyclone 10 is provided with a first spiral blade 12; the second cyclone 20 is provided with a second cyclone chamber 21, and the inner wall of the second cyclone 20 is provided with a second spiral blade 22, and the second cyclone 20 is movably sleeved on the first cyclone 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 cyclone 10 and communicated with the first cyclone chamber 11, and the fixed section 32 is connected to the second cyclone 20 and communicated with the second cyclone chamber 21;

[0039] In addition, the first driving assembly 40 is connected to the first cyclone tube 10 for driving the first cyclone tube 10 to rotate around its central axis; the second driving assembly 50 is connected to the overflow pipe 30 for driving the overflow pipe 30 to rotate around its central axis.

[0040] The above-mentioned secondary cyclone oil-water separation device 100 is provided with an overflow pipe 30, a first cyclone cylinder 10, and a second cyclone cylinder 20 which are nested with each other. During use, the production wastewater first enters the first cyclone cylinder 10, and the overflow pipe 30 and the first cyclone cylinder 10 rotate in the first cyclone chamber 11 to drive the production wastewater to form a cyclone, so that the production wastewater produces a primary oil product and a primary sewage in the first cyclone chamber 11, and the primary oil product enters the second cyclone cylinder 20 through the overflow pipe 30 for secondary cyclone purification. In the second cyclone chamber 21, the first cyclone cylinder 10 rotates to drive the primary oil product to form a cyclone, and finally obtains finished oil and secondary sewage, and the first driving 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, and the rotation speed of the first cyclone tube 10 and the overflow pipe 30 can be adjusted according to the flow rate and pressure of the produced wastewater; therefore, the two-stage cyclone oil-water separation device 100 realizes a two-stage cyclone purification process. The structural arrangement of the overflow pipe 30, the first cyclone tube 10, and the second cyclone tube 20, which are mutually nested, not only saves the floor space of the device, but also improves the cyclone intensity in the first cyclone chamber 11. At the same time, the first drive assembly 40 and the second drive assembly 50 actively drive the first cyclone tube 10 and the overflow pipe 30, and the rotation speed can be changed to effectively adapt to the sloshing condition of the FPSO, thereby improving the purification and oil-water separation effect of the oil-water separation device 100.

[0041] Specifically, Figures 1 to 4 As shown, in one embodiment, the first cyclone 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 arranged on the top wall of the first cyclone 10, the first liquid outlet 141 is arranged on the bottom wall of the first cyclone 10, and the first oil outlet 33 is arranged at the bottom of the movable section 31 of the overflow pipe 30. Therefore, after the produced sewage enters the first cyclone chamber 11 through the first liquid inlet 131, the cyclone produces a primary oil product and primary sewage, and the primary oil product flows out of the first cyclone chamber 11 through the first oil outlet 33, and the primary sewage flows out of the first cyclone chamber 11 through the first liquid outlet 141.

[0042] Among them, 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 arranged 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 arranged 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 the second liquid outlet 25; the fixed section 32 of the overflow pipe 30 is connected with the second liquid inlet 23, and the primary oil enters the second cyclone chamber 21 through the overflow pipe 30 and the second liquid inlet 23, and rotates in the second cyclone chamber 21 to separate the finished oil and the secondary sewage, and the finished oil flows out of the second cyclone chamber 21 through the second oil outlet 24, and the secondary sewage 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 via 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, Figure 1 and Figure 4 As shown, in one embodiment, a fluid pump 35 is provided on the overflow pipe 30 for pumping the primary oil product from the first cyclone chamber 11 into the second cyclone chamber 21 .

[0045] Specifically, 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 cyclone 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, and together they form a cyclone for the production wastewater in the first cyclone chamber 11, and the second spiral blade 22 and the fourth spiral blade 18 are arranged opposite to each other, and together they form a cyclone for the first-level oil product in the second cyclone chamber 21, which is beneficial to improve the cyclone intensity in the first cyclone chamber 11 and the second cyclone chamber 21, respectively improve the two-stage oil-water separation efficiency, and improve the oil-water separation effect.

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

[0047] Specifically, in one embodiment, the rotation direction of the overflow pipe 30 is opposite to that of the first cyclone 10. The oil-water separation device 100 is configured such that the rotation direction of the overflow pipe 30 is opposite to that of the first cyclone 10. When the rotation speed remains unchanged, when the overflow pipe 30 and the first cyclone 10 rotate in opposite directions, the swirl intensity in the first cyclone chamber 11 is greater than when the rotation directions are the same, which effectively saves energy consumption and improves the oil-water separation efficiency.

[0048] Specifically, Figure 3 and Figure 4As shown, in one embodiment, a heating assembly 60 is sleeved on the second cyclone cylinder 20, and the heating assembly 60 includes a heating interlayer 61 arranged on the second cyclone cylinder 20, and a heating fluid cavity 62, a heating liquid inlet 63 and a heating liquid outlet 64 connected to the heating fluid cavity 62 are provided in the heating interlayer 61, and the heating liquid inlet 63 is connected to the oil outlet of the second cyclone cylinder 20.

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

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

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

[0052] Specifically, Figure 1 and Figure 3 As shown, in one embodiment, the first cyclone 10 includes a liquid inlet cylinder 13 and a rotating cylinder 14, the liquid inlet cylinder 13 is provided with a first liquid inlet 131, the rotating cylinder 14 is provided with a first cyclone chamber 11, the liquid inlet cylinder 13 is communicated with the rotating cylinder 14, the rotating cylinder 14 is penetrated in the second cyclone cylinder 20, and is rotatably connected to the second cyclone cylinder 20, and 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, if Figure 3 As shown, in one embodiment, the first cyclone 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 active section 31 of the overflow pipe 30 away from the rotating cylinder 14. The liquid separator 15 is connected to the first cyclone chamber 11 through a plurality of liquid inlet vertical pipes 16.

[0054] The first cyclone 10 adopts a liquid inlet cylinder 13 and a rotating cylinder 14 which are interconnected. The liquid inlet cylinder 13 is connected to the first cyclone chamber 11 of the rotating cylinder 14 through a liquid separator 15 and a liquid inlet vertical pipe 16, thereby realizing a rotational connection between the rotating cylinder 14 and the second cyclone 20, and a rotational connection between the movable section 31 of the overflow pipe 30 and the rotating cylinder 14, thereby avoiding interference between the rotation of the overflow pipe 30 and the rotation of the first cyclone 10 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. A first end cap is provided at the upper end of the rotating cylinder 14, and the liquid inlet vertical pipe 16 passes through the first end cap and communicates with the liquid inlet annular pipe 17.

[0056] In addition, first bearings 26 are respectively arranged between the two ends of the rotating cylinder 14 and the second cyclone cylinder 20 to ensure the rotation of the rotating cylinder 14 ; second end covers are respectively arranged at the two ends of the second cyclone cylinder 20 to seal the first bearings 26 .

[0057] Furthermore, if Figure 3 and Figure 4 As shown, in one embodiment, the first cyclone 10 further includes a liquid inlet annular pipe 17, which is sleeved on the overflow pipe 30, and the liquid inlet annular pipe 17 is communicated with the liquid inlet vertical pipe 16 and the first cyclone chamber 11 respectively.

[0058] In this specific embodiment, a plurality of spray holes are provided on the liquid inlet annular tube 17 , and the angle between the central axis of the spray hole and the diameter direction of the liquid inlet annular tube 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 annular pipe 17. After the liquid reaches the liquid inlet annular pipe 17 through the liquid inlet vertical pipe 16, the liquid inlet annular pipe 17 is provided with a plurality of spray ports which are at an acute angle to the horizontal direction, so that the production wastewater is directly sprayed on the inner wall of the rotating cylinder 14 to avoid the direct outflow of the production wastewater, thereby increasing the treatment time of the production wastewater in the first cyclone chamber 11 and further improving the oil-water separation effect.

[0060] Specifically, Figure 1 and Figure 3 As shown, in one embodiment, the first driving 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 reducer 42, the first reducer 42 is connected to the first transmission wheel 43 in a one-to-one correspondence, and the two ends of the rotating cylinder 14 are respectively connected to the first transmission wheel 43 through the first transmission belt 44.

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

[0062] Specifically, Figure 1 and Figure 4 As shown, in one embodiment, the second driving assembly 50 includes a second rotating motor 51, a second reducer 52 and a second transmission wheel 53 connected in sequence, and the second transmission wheel 53 is connected to the movable section 31 of the overflow pipe 30 through a second transmission belt 54. The second driving assembly 50 is provided with a second reducer 52, which can adjust the rotation speed of the movable section 31 of the overflow pipe 30 in time, and is connected to the movable section 31 of the overflow pipe 30 through the second transmission belt 54, thereby effectively improving the transmission efficiency of the second driving assembly 50.

[0063] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0064] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0067] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0068] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A two-stage cyclone oil-water separation device, characterized in that: include: A first cyclone cylinder (10), wherein a first cyclone chamber (11) is provided in the first cyclone cylinder (10), and a first spiral blade (12) is provided on the inner wall of the first cyclone cylinder (10); A second cyclone cylinder (20), wherein a second cyclone chamber (21) is provided in the second cyclone cylinder (20), a second spiral blade (22) is provided on the inner wall of the second cyclone cylinder (20), and the second cyclone cylinder (20) is movably sleeved on the first cyclone cylinder (10); an overflow pipe (30), the overflow pipe (30) comprising a movable section (31) and a fixed section (32) connected to each other, the movable section (31) being rotationally connected to the first cyclone cylinder (10) and communicating with the first cyclone chamber (11), and the fixed section (32) being connected to the second cyclone cylinder (20) and communicating with the second cyclone chamber (21); A first driving assembly (40), the first driving assembly (40) being connected to the first cyclone tube (10) and being used to drive the first cyclone tube (10) to rotate around its central axis; A second driving assembly (50), the second driving assembly (50) is connected to the overflow pipe (30) and is used to drive the overflow pipe (30) to rotate around its central axis.

2. A two-stage cyclone oil-water separation device according to claim 1, characterized in that: The rotation direction of the overflow pipe (30) is opposite to the rotation direction of the first cyclone drum (10).

3. A two-stage cyclone oil-water separation device according to claim 1, characterized in that: A heating assembly (60) is sleeved on the second cyclone tube (20), and the heating assembly (60) comprises a heating interlayer (61) arranged on the second cyclone tube (20), wherein the heating interlayer (61) is provided with a heating fluid cavity (62), a heating liquid inlet (63) and a heating liquid outlet (64) which are connected to the heating fluid cavity (62).

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

5. The two-stage cyclone oil-water separation device according to claim 1, characterized in that: The first cyclone cylinder (10) comprises a liquid inlet cylinder (13) and a rotating cylinder (14); the liquid inlet cylinder (13) is provided with a first liquid inlet port (131); the rotating cylinder (14) is provided with a first cyclone chamber (11); the liquid inlet cylinder (13) is communicated with the rotating cylinder (14); the rotating cylinder (14) is inserted into the second cyclone cylinder (20) and is rotatably connected to the second cyclone 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 separation device according to claim 5, characterized in that: The first cyclone (10) further comprises a liquid separation head (15) connected to the liquid inlet cylinder (13); the liquid separation head (15) is located on a side of the movable section (31) away from the rotating cylinder (14); the liquid separation head (15) is connected to the first cyclone chamber (11) via a plurality of liquid inlet vertical pipes (16).

7. A two-stage cyclone oil-water separation device according to claim 6, characterized in that: The first cyclone cylinder (10) further comprises a liquid inlet annular pipe (17), wherein the liquid inlet annular pipe (17) is sleeved on the overflow pipe (30), and the liquid inlet annular pipe (17) is respectively connected to the liquid inlet vertical pipe (16) and the first cyclone chamber (11).

8. A two-stage cyclone oil-water separation device according to claim 7, characterized in that: The liquid inlet annular tube (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 annular tube (17) is 30° to 60°.

9. The two-stage cyclone oil-water separation device according to claim 5, characterized in that: The first driving assembly (40) comprises 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) and the first transmission wheels (43) are connected in a one-to-one correspondence; and the two ends of the rotating cylinder (14) are respectively connected to the first transmission wheels (43) through the first transmission belts (44).

10. The two-stage cyclone oil-water separation device according to claim 1, characterized in that: The second driving assembly (50) comprises a second rotating motor (51), a second reducer (52) and a second transmission wheel (53) which are connected in sequence, and 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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