An oil-water separation and purification device for oilfield high-pollution operation waste liquid

Abstract

The application discloses an oil-water separation and purification device for oil field high-pollution operation waste liquid, and relates to the field of polluted waste liquid purification. The device comprises a driving base, which is a main support component and a main driving component of the purification device; a separation tank, which is arranged on the top of an output seat of the driving base; and a membrane cleaning component, which is arranged in the separation tank and connected with an output end of the driving base. The membrane cleaning component is a bearing component of a filter membrane and is used for cleaning pollutants attached to the filter membrane. Through rotation and vibration of the membrane cleaning component, passive filtration of a traditional static membrane is changed into active separation. Through the synergistic effect of tangential shear force and normal inertial force, continuous peeling and instant discharge of the pollutants are realized, the stable separation efficiency is maintained, and the operation cycle and the service life of the filter membrane are prolonged.

Description

Technical Field

[0001] This invention relates to the field of polluted wastewater purification, specifically an oil-water separation and purification device for highly polluting wastewater from oilfield operations. Background Technology

[0002] Highly polluting wastewater from oilfield operations mainly originates from drilling, fracturing, oil production, and well washing processes. It is characterized by high oil content, high emulsification, high suspended solids concentration, and complex composition. If discharged directly without effective treatment, it will cause serious harm to the ecological environment and human health.

[0003] In traditional static membrane modules, highly polluting wastewater from oilfield operations flows in a laminar or weakly turbulent manner along the membrane surface under pressure. The shear force of the fluid on the membrane surface is weak, which cannot effectively flush away or remove oil droplets, suspended solids, and colloidal pollutants adsorbed and deposited on the membrane surface. This can easily lead to severe concentration polarization and membrane pore blockage, resulting in rapid decline in membrane flux and separation efficiency. Furthermore, frequent chemical cleaning is required, making it difficult to adapt to complex wastewater treatment conditions with high oil content, high emulsification, and high suspended solids.

[0004] Therefore, it is necessary to provide an oil-water separation and purification device for highly polluting wastewater from oilfield operations to solve the aforementioned technical problems. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an oil-water separation and purification device for highly polluting wastewater from oilfield operations, comprising:

[0006] The drive base serves as the main support component and main drive component of the purification device.

[0007] A separation tank is disposed on top of the output seat of the drive base;

[0008] A membrane cleaning assembly is disposed inside the separation tank and connected to the output end of the drive base;

[0009] The cleaning membrane assembly serves as a carrier component for the filter membrane and is used to clean contaminants adhering to the filter membrane.

[0010] Further, preferably, the separating tank comprises:

[0011] The outer tank is located on top of the output seat of the drive base and serves as the main body of the separation tank. The outer wall of the outer tank is provided with multiple support feet arranged in a circumferential array.

[0012] The inner tank assembly is fixedly disposed inside the outer tank;

[0013] The liquid injection hole is located at the top of the outer tank and is connected to the inner tank assembly.

[0014] An inclined ring is disposed between the outer tank and the inner tank assembly, and is located at the bottom of the outer tank;

[0015] A concentrated liquid outlet is provided through the bottom of the side wall of the outer tank;

[0016] The clear liquid outlet is located at the bottom of the outer tank and is connected to the inner tank assembly.

[0017] Further, preferably, the inner tank assembly includes:

[0018] An upper inner tank is disposed in the upper section of the inner cavity of the outer tank, and the top of the upper inner tank is fixedly connected to the top of the outer tank;

[0019] The lower inner tank is located in the lower section of the inner cavity of the outer tank, and the bottom of the lower inner tank is fixedly connected to the bottom of the outer tank.

[0020] Furthermore, preferably, the cleaning membrane assembly is disposed between the upper inner tank and the lower inner tank.

[0021] Further, preferably, the cleaning membrane assembly includes:

[0022] The base ring is fixedly installed inside the outer tank.

[0023] A positioning ring is fixedly installed at the bottom of the upper inner tank, and a limiting groove is coaxially formed on the positioning ring;

[0024] A vibration ring is disposed between the base ring and the positioning ring;

[0025] A sewage discharge assembly is disposed between the positioning ring and the vibrating ring;

[0026] A vibration-damping ring is rotatably mounted on the top of the lower inner tank, and the vibration-damping ring is in contact with the base ring;

[0027] A second elastic ring is disposed between the base ring and the vibration ring;

[0028] The first support is rotatably disposed within the vibrating ring, and the filter membrane is fixedly installed on the first support;

[0029] The second bracket is fixedly installed inside the vibration-driving ring;

[0030] A sliding shaft is disposed between the first bracket and the second bracket;

[0031] Multiple vibration-driving components are arranged in a circumferential array at the bottom of the base ring;

[0032] A connecting shaft is connected between the sliding shaft and the drive base.

[0033] Further, preferably, the vibration driving assembly includes:

[0034] The fixing frame is fixedly installed at the bottom of the base ring;

[0035] A rotating rod, one end of which is rotatably hinged to the fixed frame;

[0036] A spring rod, one end of which is slidably embedded in the rotating rod, and the other end of which is provided with a sliding ball;

[0037] A drive rod is slidably disposed in the base ring. One end of the drive rod is fixedly connected to the bottom of the vibration ring, and the other end pushes against the rotating rod. A spring is sleeved on the drive rod, and the spring is located between the vibration ring and the base ring.

[0038] Furthermore, as a preferred embodiment, the outer circumferential wall of the vibration drive ring is provided with a curved groove, and the sliding ball is slidably disposed in the curved groove.

[0039] Further, preferably, the sewage discharge assembly includes:

[0040] A sealing ring, which is slidably disposed in the limiting groove;

[0041] A locking ring is disposed on the outside of the limiting groove;

[0042] A first elastic ring is disposed between the sealing ring and the locking ring.

[0043] Further, preferably, the drive base includes:

[0044] frame;

[0045] A drive motor is mounted on one side of the frame;

[0046] A speed reducer is installed on the other side of the frame. A connecting pivot is provided on the top of the speed reducer, and the connecting pivot is connected to the connecting shaft.

[0047] Compared with the prior art, the present invention provides an oil-water separation and purification device for highly polluting wastewater from oilfield operations, which has the following beneficial effects:

[0048] This device drives the membrane cleaning assembly to rotate via a drive base, generating tangential shear force on the filter membrane surface to effectively remove oil droplets, suspended solids, and colloidal contaminants adhering to the membrane surface. Simultaneously, the rotational motion is converted into axial reciprocating motion via a vibration drive assembly, driving the vibration ring to generate axial vibration. This allows the filter membrane to synchronously achieve periodic micro-displacement during rotation, breaking the adsorption bonds between contaminants and the membrane surface, inhibiting concentration polarization and gel layer formation. The synergistic effect of rotation and vibration enables continuous self-cleaning of the filter membrane.

[0049] In addition, by linking the liquid level sensor with the sewage discharge component, the periodic management of pollutant accumulation and centralized discharge is realized, which avoids the mixing of pollutants with untreated waste liquid, ensures the separation effect, and solves the problems of easy fouling, rapid flux decline and frequent chemical cleaning of traditional static membrane components, thereby improving the oil-water separation efficiency and operational stability of oilfield high-pollution operation waste liquid. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of an oil-water separation and purification device for highly polluting wastewater from oilfield operations.

[0051] Figure 2 This is a schematic cross-sectional view of the separator.

[0052] Figure 3 This is a schematic diagram of the drive base structure;

[0053] Figure 4 This is a cross-sectional schematic diagram of the membrane module;

[0054] Figure 5 This is a structural schematic diagram of the vibration drive assembly and the sewage discharge assembly.

[0055] In the diagram: 1. Drive base; 11. Frame; 12. Drive motor; 13. Transmission belt; 14. Reducer; 15. Connecting rotary seat; 2. Separator; 21. Outer tank; 22. Upper inner tank; 23. Lower inner tank; 24. Inclined ring; 25. Concentrate outlet; 26. Clear liquid outlet; 27. Support foot; 28. Injection hole; 3. Membrane cleaning assembly; 31. Base ring; 311. Lower liquid outlet; 32. Vibration drive ring; 321. Curved groove; 33. Vibration ring; 331. Inclined surface; 3 4. Positioning ring; 341. Limiting groove; 35. First bracket; 36. Second bracket; 37. Sliding shaft; 38. Sewage discharge assembly; 381. Sealing ring; 382. First elastic ring; 383. Locking ring; 39. Vibration drive assembly; 391. Fixing frame; 392. Rotating rod; 393. Spring rod; 394. Sliding ball; 395. Drive rod; 396. Spring; 40. Second elastic ring; 41. Sealing membrane; 42. Connecting shaft; 4. Filter membrane; 5. Liquid level sensor. Detailed Implementation

[0056] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms are interchangeable where appropriate; this is merely a distinguishing method used to describe objects with the same attributes in the embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of elements is not necessarily limited to those elements but may include other elements not explicitly listed or inherent to those processes, methods, products, or apparatuses.

[0057] Example: Please refer to Figures 1-5 In this embodiment of the invention, an oil-water separation and purification device for highly polluting wastewater from oilfield operations is provided, comprising:

[0058] Drive base 1, which serves as the main support component and main drive component of the purification device;

[0059] Separation tank 2 is disposed on top of the output seat of the drive base 1;

[0060] The membrane cleaning assembly 3 is disposed inside the separation tank 2 and connected to the output end of the drive base 1;

[0061] The cleaning membrane assembly 3 serves as a support component for the filter membrane 4 and is used to clean contaminants adhering to the filter membrane 4.

[0062] During the specific separation process, the highly polluting waste liquid from the oilfield to be treated is injected into the separation tank 2 through the injection hole 28, and the drive base 1 is started, which drives the membrane cleaning assembly 3 to rotate.

[0063] It should be noted that the membrane cleaning component 3 serves as the supporting structure for the filter membrane 4. During rotation, the waste liquid generates tangential flow on the membrane surface, forming a velocity gradient, which in turn generates shear force. This shear force can effectively remove oil droplets, suspended solids, and colloidal contaminants adhering to the membrane surface, preventing them from directly clogging the membrane pores.

[0064] Meanwhile, under the rotation drive, the membrane cleaning component 3 generates axial reciprocating vibration through the mechanical conversion structure, causing the filter membrane 4 to undergo periodic micro-displacement during rotation, thereby destroying the physical and chemical adsorption between pollutants and the membrane surface; disturbing the boundary layer, forming periodic disturbances to the concentration boundary layer on the membrane surface, suppressing concentration polarization; preventing the formation of the gel layer, and destroying the deposition and compaction of pollutants on the membrane surface.

[0065] Through the synergistic effect of the tangential shear force generated by rotation and the axial destructive force generated by vibration, pollutants are difficult to adhere or accumulate stably on the membrane surface, thereby achieving continuous self-cleaning of the filter membrane 4 and significantly extending the continuous operation cycle.

[0066] Finally, the waste liquid after separation by the membrane assembly 3 is divided into two parts: concentrated liquid with high oil content and suspended solids and clear liquid purified water. These are discharged independently through the concentrated liquid outlet 25 and the clear liquid outlet 26 respectively provided in the separation tank 2, thus completing the oil-water separation.

[0067] In this embodiment, combined with the appendix Figure 2 The separation tank 2 includes:

[0068] The outer tank 21 is located on the top of the output seat of the drive base 1 and serves as the main body of the separation tank 2. The outer wall of the outer tank 21 is provided with multiple support feet 27 arranged in a circumferential array to provide stable support for the separation tank 2.

[0069] The inner tank assembly is fixedly disposed inside the outer tank 21;

[0070] The injection hole 28 is located on the top of the outer tank 21 and is connected to the inner tank assembly for injecting the waste liquid to be treated into the separation tank 2.

[0071] An inclined ring 24 is disposed between the outer tank 21 and the inner tank assembly, and is located at the bottom of the outer tank 21, for guiding the flow of concentrated liquid and promoting the smooth discharge of concentrated liquid;

[0072] A concentrated liquid outlet 25 is provided through the bottom of the side wall of the outer tank 21 for discharging the separated concentrated liquid;

[0073] The clear liquid outlet 26 is located at the bottom of the outer tank 21 and is connected to the inner tank assembly, and is used to discharge the separated clear liquid.

[0074] It should be noted that the inner tank assembly includes:

[0075] The upper inner tank 22 is located in the upper section of the inner cavity of the outer tank 21. The top of the upper inner tank 22 is fixedly connected to the top of the outer tank 21. A liquid level sensor 5 is installed inside the upper inner tank 22 to monitor changes in liquid level and trigger the cleaning membrane assembly 3 to perform the sewage discharge process according to preset conditions.

[0076] The lower inner tank 23 is disposed in the lower section of the inner cavity of the outer tank 21, and the bottom of the lower inner tank 23 is fixedly connected to the bottom of the outer tank 21.

[0077] Furthermore, the cleaning membrane assembly 3 is disposed between the upper inner tank 22 and the lower inner tank 23.

[0078] It should be noted that the upper inner tank 22 serves as a pretreatment tank for waste liquid, which initially contains and regulates the liquid level of the waste liquid entering the separation tank 2; the lower inner tank 23 works in conjunction with the outer tank 21 to divide the bottom space of the separation tank 2 into a clear liquid chamber and a concentrated liquid chamber, wherein the clear liquid chamber is inside the lower inner tank 23, and the concentrated liquid chamber is the annular area between the lower inner tank 23 and the outer tank 21.

[0079] After the waste liquid is separated and purified by the cleaning membrane assembly 3, the concentrated liquid part is discharged into the lower concentrated liquid chamber along the circumferential edge of the cleaning membrane assembly 3 and discharged through the concentrated liquid outlet 25, while the clear liquid part directly passes through the filter membrane 4 into the lower clear liquid chamber and is discharged through the clear liquid outlet 26, thereby realizing the separation and classified discharge of oil and water in the waste liquid.

[0080] In this embodiment, combined with the appendix Figure 4 The cleaning membrane assembly 3 includes:

[0081] A base ring 31 is fixedly installed inside the outer tank 21. The base ring 31 has multiple liquid outlets 311 circumferentially opened for discharging concentrated liquid downwards.

[0082] A positioning ring 34 is fixedly disposed at the bottom of the upper inner tank 22, and a limiting groove 341 is coaxially formed on the positioning ring 34;

[0083] A vibrating ring 33 is disposed between the base ring 31 and the positioning ring 34. The vibrating ring 33 has an inclined surface 331 for guiding the concentrated liquid out.

[0084] Among them, a sealing membrane 41 is provided between the circumferential edge of the vibration ring 33 and the base ring 31 to prevent pollutants from entering and extend the service life of the vibration drive assembly 39; the inner walls of the positioning ring 34 and the vibration ring 33 near the inner ring are provided with an inclined angle, and the two inclined feet cooperate to form a side "V" shaped opening, which facilitates the accumulation and discharge of pollutants.

[0085] A sewage discharge assembly 38 is disposed between the positioning ring 34 and the vibration ring 33;

[0086] A vibration-damping ring 32 is rotatably mounted on the top of the lower inner tank 23, and the vibration-damping ring 32 is in contact with the base ring 31;

[0087] The second elastic ring 40 is disposed between the base ring 31 and the vibration ring 33;

[0088] The first support 35 is rotatably disposed inside the vibration ring 33, and the outer circumferential wall of the first support 35 is in contact with the inner ring wall of the vibration ring 33. The filter membrane 4 is fixedly installed on the first support 35.

[0089] The second bracket 36 is fixedly installed inside the vibration driving ring 32;

[0090] A sliding shaft 37 is disposed between the first bracket 35 and the second bracket 36;

[0091] Multiple vibration driving components 39 are arranged in a circumferential array at the bottom of the base ring 31;

[0092] A connecting shaft 42 is connected between the sliding shaft 37 and the drive base 1.

[0093] It should be noted that the sliding shaft 37 is divided into upper and lower parts, and the two parts can slide relative to each other axially; the inner ring wall of the vibration ring 33 is provided with a limit groove, which is used to realize the axial synchronous movement of the vibration ring 33 and the first support 35 without affecting the rotational degree of freedom of the first support 35, and the outer diameter of the vibration ring 33 is smaller than the outer diameter of the base ring 31 and the positioning ring 34, so it will not affect the discharge of the concentrated liquid above.

[0094] In the actual operation process, after the drive base 1 is started, the connecting shaft 42 drives the cleaning membrane assembly 3 to enter the working state, which can be divided into the following two parts:

[0095] 1) Rotational shearing: The first support 35 drives the filter membrane 4 to rotate, and the fluid on the membrane surface generates a tangential velocity gradient, forming a shear force. While continuously separating the clear liquid, oil droplets, suspended solids, and colloidal contaminants deposited on the surface of the filter membrane 4 are sheared off.

[0096] 2) Axial vibration: The second support 36 drives the vibration ring 32 to rotate, and the rotational motion is converted into axial reciprocating motion through the vibration assembly 39, which drives the vibration ring 33 to generate axial vibration, so that the filter membrane 4 can simultaneously break the adsorption bonds between the pollutants and the membrane surface during the rotation process, prevent the pollutants from adhering stably on the membrane surface, and realize the continuous self-cleaning of the filter membrane 4.

[0097] In addition, the working state of the membrane cleaning component 3 can also be divided into the following two stages:

[0098] a. Accumulation stage: At the beginning of the separation process, the waste liquid is injected into the upper inner tank 22. At this time, the pollutants separated by the filter membrane 4 are relatively few. The sewage discharge component 38 is in a closed state. Under the active cleaning action of the cleaning membrane component 3, the stripped pollutants accumulate along the surface of the filter membrane 4 towards the circumferential edge and are temporarily stored in the sewage discharge area to avoid the separated pollutants from being discharged together with the untreated waste liquid, thereby ensuring the separation effect.

[0099] b. Sewage discharge stage: As the separation process continues, the waste liquid level in the upper inner tank 22 gradually rises. When the liquid level reaches the preset threshold, the liquid level sensor 5 is triggered, and the sewage discharge component 38 is opened accordingly. At this time, the pollutants accumulated on the circumferential edge are squeezed out, forming a dynamic sewage discharge balance, that is, the pollutant discharge rate matches the separation accumulation rate until the separation ends, realizing the periodic self-cleaning and stable operation of the membrane cleaning component 3.

[0100] Furthermore, in conjunction with the appendix Figure 5 The vibration drive assembly 39 includes:

[0101] A fixing bracket 391 is fixedly disposed at the bottom of the base ring 31;

[0102] The rotating rod 392 has one end rotatably hinged to the fixed frame 391;

[0103] A spring rod 393 has one end slidably embedded in the rotating rod 392, and the other end is provided with a sliding ball 394;

[0104] A drive rod 395 is slidably disposed in the base ring 31. One end of the drive rod 395 is fixedly connected to the bottom of the vibration ring 33, and the other end pushes against the rotating rod 392. A spring 396 is sleeved on the drive rod 395. The spring 396 is located between the vibration ring 33 and the base ring 31 and is used to reset the vibration ring 33 so that the drive rod 395 always pushes against the rotating rod 392.

[0105] It should be noted that the outer circumferential wall of the vibration drive ring 32 is provided with a curved groove 321, and the sliding ball 394 is slidably disposed in the curved groove 321. The spring rod 393 can ensure that the sliding ball 394 is always in contact with the inner wall of the curved groove 321.

[0106] When the drive ring 32 rotates, the sliding ball 394 slides along the curved groove 321, causing the rotating rod 392 to oscillate back and forth around the hinge axis. During this process, when the sliding ball 394 slides to the peak of the curved groove 321, the rotating rod 392 swings upward, pushing the drive rod 395 to slide upward axially, and the vibration ring 33 moves upward accordingly, stretching the spring 396. When the sliding ball 394 slides to the valley of the curved groove 321, the rotating rod 392 swings downward, the spring 396 returns to its original position and contracts, pulling the drive rod 395 downward, and the vibration ring 33 moves downward accordingly. This cycle repeats, realizing the periodic axial reciprocating vibration of the vibration ring 33, and the frequency is related to the rotational speed of the drive ring 32 and the wave number of the curved groove 321.

[0107] In this embodiment, the sewage discharge component 38 includes:

[0108] A sealing ring 381 is slidably disposed in the limiting groove 341;

[0109] A locking ring 383 is disposed on the outside of the limiting groove 341;

[0110] A first elastic ring 382 is disposed between the sealing ring 381 and the locking ring 383.

[0111] During the accumulation stage, the vibrating ring 33 moves axially upward to push the sealing ring 381 to slide upward along the limiting groove 341, compressing the first elastic ring 382. The vibrating ring 33 moves axially downward, and the first elastic ring 382 extends and resets, so that the sealing ring 381 always fits against the upper surface of the vibrating ring 33, ensuring that the drain outlet is in a sealed and closed state.

[0112] During the sewage discharge stage, when the liquid level sensor 5 is triggered, the locking ring 383 is activated. When the vibrating ring 33 pushes the sealing ring 381 to the highest point, the locking ring 383 locks the sealing ring 381 in position. At this time, the vibrating ring 33 moves down normally, while the sealing ring 381 remains at the highest position, forming an annular sewage discharge gap between the two. With the vibration of the vibrating ring 33, the sewage discharge gap opens and closes periodically, thereby achieving intermittent and stable discharge of concentrated pollutants.

[0113] In this embodiment, combined with the appendix Figure 3 The driving base 1 includes:

[0114] Frame 11;

[0115] A drive motor 12 is mounted on one side of the frame 11;

[0116] The reducer 14 is installed on the other side of the frame 11. A connecting pivot 15 is provided on the top of the reducer 14, and the connecting pivot 15 is connected to the connecting shaft 42.

[0117] The output end of the drive motor 12 is connected to the input end of the reducer 14 via a transmission belt 13 to achieve power transmission.

[0118] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An oil-water separation and purification device for highly polluting wastewater from oilfield operations, characterized in that, include: The drive base (1) serves as the main support component and main drive component of the purification device; Separation tank (2), which is disposed on top of the output seat of the drive base (1); A membrane cleaning assembly (3) is disposed inside the separation tank (2) and connected to the output end of the drive base (1); The cleaning membrane assembly (3) serves as a support component for the filter membrane (4) and is used to clean contaminants attached to the filter membrane (4).

2. The oil-water separation and purification device for highly polluting oilfield operation wastewater according to claim 1, characterized in that, The separation tank (2) includes: The outer tank (21) is located on the top of the output seat of the drive base (1) and serves as the main body of the separation tank (2). The outer wall of the outer tank (21) is provided with multiple support feet (27) arranged in a circumferential array. The inner tank assembly is fixedly disposed inside the outer tank (21); The injection hole (28) is located on the top of the outer tank (21) and is connected to the inner tank assembly; An inclined ring (24) is disposed between the outer tank (21) and the inner tank assembly, and is located at the bottom of the outer tank (21); A concentrated liquid outlet (25) is provided through the bottom of the side wall of the outer tank (21); The clear liquid outlet (26) is located at the bottom of the outer tank (21) and is connected to the inner tank assembly.

3. The oil-water separation and purification device for highly polluting oilfield operation wastewater according to claim 2, characterized in that, The inner tank assembly includes: The upper inner tank (22) is disposed in the upper section of the inner cavity of the outer tank (21), and the top of the upper inner tank (22) is fixedly connected to the top of the outer tank (21); The lower inner tank (23) is located in the lower section of the inner cavity of the outer tank (21), and the bottom of the lower inner tank (23) is fixedly connected to the bottom of the outer tank (21).

4. The oil-water separation and purification device for highly polluting oilfield operation wastewater according to claim 3, characterized in that, The cleaning membrane assembly (3) is disposed between the upper inner tank (22) and the lower inner tank (23).

5. The oil-water separation and purification device for highly polluting oilfield operation wastewater according to claim 4, characterized in that, The membrane cleaning assembly (3) includes: A base ring (31) is fixedly disposed inside the outer can (21). A positioning ring (34) is fixedly installed at the bottom of the upper inner tank (22), and a limiting groove (341) is coaxially provided on the positioning ring (34). A vibration ring (33) is disposed between the base ring (31) and the positioning ring (34); A sewage discharge assembly (38) is disposed between the positioning ring (34) and the vibration ring (33); Vibration-driving ring (32) is rotatably mounted on the top of the lower inner tank (23), and the vibration-driving ring (32) is in contact with the base ring (31); A second elastic ring (40) is disposed between the base ring (31) and the vibration ring (33); The first support (35) is rotatably disposed within the vibrating ring (33), and the filter membrane (4) is fixedly installed on the first support (35); The second bracket (36) is fixedly installed inside the vibration driving ring (32); A sliding shaft (37) is disposed between the first bracket (35) and the second bracket (36); Multiple vibration drive components (39) are arranged in a circumferential array at the bottom of the base ring (31); A connecting shaft (42) is connected between the sliding shaft (37) and the drive base (1).

6. The oil-water separation and purification device for highly polluting oilfield operation wastewater according to claim 5, characterized in that, The vibration drive assembly (39) includes: A fixing frame (391) is fixedly installed at the bottom of the base ring (31); A rotating rod (392) has one end rotatably hinged to the fixed frame (391); A spring rod (393) has one end slidably embedded in the rotating rod (392) and the other end is provided with a sliding ball (394). A drive rod (395) is slidably disposed in the base ring (31). One end of the drive rod (395) is fixedly connected to the bottom of the vibration ring (33), and the other end pushes against the rotating rod (392). A spring (396) is sleeved on the drive rod (395), and the spring (396) is located between the vibration ring (33) and the base ring (31).

7. The oil-water separation and purification device for highly polluting oilfield operation wastewater according to claim 6, characterized in that, The outer circumferential wall of the vibration-driving ring (32) is provided with a curved groove (321), and the sliding ball (394) is slidably disposed in the curved groove (321).

8. The oil-water separation and purification device for highly polluting oilfield operation wastewater according to claim 5, characterized in that, The sewage discharge assembly (38) includes: A sealing ring (381) is slidably disposed in the limiting groove (341); A locking ring (383) is disposed on the outside of the limiting groove (341); A first elastic ring (382) is disposed between the sealing ring (381) and the locking ring (383).

9. The oil-water separation and purification device for highly polluting wastewater from oilfield operations according to claim 5, characterized in that, The drive base (1) includes: Framework (11); A drive motor (12) is mounted on one side of the frame (11); A reducer (14) is installed on the other side of the frame (11). A connecting swivel (15) is provided on the top of the reducer (14), and the connecting swivel (15) is connected to the connecting shaft (42).

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