Offshore spilled oil cleaning and recycling device and recycling method thereof

Abstract

The invention relates to the technical field of seaborne spilled oil cleaning and recycling devices, in particular to a seaborne spilled oil cleaning and recycling device and a recycling method thereof.The seaborne spilled oil cleaning and recycling device comprises an inner barrel, the bottom of the peripheral wall of the inner barrel is provided with a first oil outlet and a first water outlet which are communicated with the interior, and the first oil outlet and the first water outlet are located in the same horizontal plane of the inner barrel; a density sensor is arranged on the inner circumferential wall of the inner barrel, the density sensor is located above the first water outlet, a liquid level sensor is arranged at the bottom in the inner barrel, and an ultrasonic disperser is arranged in the inner barrel; during use, an oil-water mixture is cooled and heated through the ultrasonic disperser in the inner barrel, the viscosity of oil is reduced, oil-water layering is accelerated, then the control unit controls the driving mechanism to drive the inner barrel to ascend or descend in the outer barrel, layered water is sucked and discharged again through the separation barrel, and layered oil is stored in the oil storage barrel. Therefore, rapid separation of oil and water on the sea surface is realized.

Description

Technical Field

[0001] The invention relates to the technical field of offshore oil spill cleaning and recovery equipment, and in particular to an offshore oil spill cleaning and recovery equipment and a recovery method thereof. Background Art

[0002] With the development of economy and society, the use of oil by human beings has become more frequent and widespread. Not only the amount of oil used in industrial refining continues to increase, but also the amount of oil consumed is increasing year by year. Therefore, the amount of offshore oil production is also increasing year by year. At the same time, due to the limited domestic oil resources, foreign imports are needed, and the importance of oil transportation is also increasing. Whether it is offshore oil production and offshore transportation, or coastal oil refining and coastal oil transportation, due to the very high safety requirements of oil refining, oil storage and oil transportation, offshore oil spills will occur if there is any carelessness in the work.

[0003] Oil spills not only cause water pollution and economic losses, but also seriously disrupt the balance of life. In order to avoid environmental pollution and waste of water resources, it is particularly important to treat and utilize oily wastewater. Therefore, many oil-water separators have emerged, mainly including catering oil-water separators and industrial oil-water separators. This patent is an offshore industrial oil-water separator, which uses the different densities of water and oil to separate them using a water outlet and an oil outlet with a height difference, and then uses oil-absorbing materials for secondary separation to achieve a complete oil-water separation step. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in order to solve the problems of low separation efficiency, general separation effect and limited use of scenes of traditional oil-water separators, a marine oil spill cleaning and recovery device and a recovery method thereof are now provided.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a marine oil spill cleaning and recovery device, comprising:

[0006] The inner barrel has a first oil outlet and a first water outlet connected to the interior, respectively, at the bottom of its outer peripheral wall, the first oil outlet and the first water outlet are located at the same horizontal plane of the inner barrel, a density sensor is arranged on the inner peripheral wall of the inner barrel, the density sensor is located above the first water outlet, a liquid level sensor is arranged at the bottom of the inner barrel, and an ultrasonic disperser is arranged inside the inner barrel;

[0007] an outer barrel, which is sleeved outside the inner barrel, the outer peripheral wall of the outer barrel is respectively provided with a second oil outlet and a second water outlet, the second water outlet is located below the second oil outlet, and the outer barrel is provided with an oil inlet pipe connected with the inner barrel;

[0008] A driving mechanism, which is arranged on the outer barrel, and is used to drive the inner barrel to move in the outer barrel and realize staggered blocking or corresponding communication between the first oil outlet and the second oil outlet, and staggered blocking or corresponding communication between the first water outlet and the second water outlet;

[0009] An oil storage barrel, which is connected to the second oil outlet;

[0010] A separation barrel, which is connected to the second water outlet, wherein a liquid distribution plate is slidably arranged in the separation barrel, wherein the liquid distribution plate divides the separation barrel into an upper cavity and a lower cavity, wherein an oil absorbing material is arranged in the lower cavity, and a liquid discharge port is arranged at the bottom of the separation barrel;

[0011] The control unit is respectively connected to the density sensor, the liquid level sensor, the ultrasonic disperser, and the drive mechanism signal. Compared with the prior art, the present solution dissipates heat and heats the oil-water mixture through the ultrasonic disperser inside the inner barrel, reduces the viscosity of the oil, and accelerates the oil-water stratification. The control unit then controls the drive mechanism to drive the inner barrel to rise or fall in the outer barrel, so as to connect or stagger the first water outlet and the second water outlet, and connect or stagger the first oil outlet and the second oil outlet, respectively. The stratified water is discharged by the separation barrel again, and the stratified oil is stored in the oil storage barrel, thereby realizing the rapid separation of oil and water on the sea surface, with high separation efficiency, protecting the environment, and maintaining the ecological balance.

[0012] In order to absorb the oil in the separated water again, in some preferred embodiments, the liquid distribution plate includes a plate body, the plate body has a liquid distribution area and a blocking area, the liquid distribution area is annular and is used to distribute the water in the upper cavity to the lower cavity, and the blocking area is located in the liquid distribution area. By setting the liquid distribution plate, the liquid distribution plate is designed into a liquid distribution area and a blocking area, that is, the path of the separated water is specified, and the separated water flows through the oil absorption material again to absorb the oil, thereby improving the separation rate.

[0013] In order to better allow the water of the liquid distribution plate to pass through the oil absorption material, in some preferred embodiments, the oil absorption material has an oil absorption area and a drainage area arranged in sequence, the oil absorption area is located below the liquid distribution area, and the drainage area is located below the blocking area. By arranging the oil absorption area of ​​the oil absorption material below the liquid distribution area and arranging the drainage area below the blocking area, it is ensured that the water of the liquid distribution plate passes through the oil absorption material, thereby improving the oil absorption efficiency.

[0014] In order to facilitate the squeezing of the oil absorbing material, in some preferred embodiments, the separation barrel is slidably provided with a cover shell in the upper cavity, and a water outlet pipe is connected between the cover shell and the second water outlet. By slidably providing the cover shell in the upper cavity, it is convenient to control the liquid distribution plate and the cover shell to slide in the separation barrel and squeeze the oil absorbing material, squeeze out the oil in the oil absorbing material, facilitate the collection and treatment of the oil, and also keep the operator clean without touching the oil and water.

[0015] Preferably, in some embodiments, a sealing strip is provided between the cover shell and the inner peripheral wall of the separation barrel.

[0016] In order to facilitate the collection of the separated oil, some preferred embodiments further include a three-way reversing valve, the first end of which is connected to the drain port, the second end of which is connected to the oil storage barrel, the third end of which is connected to the outside, and a first pump is provided between the second end of the three-way reversing valve and the oil storage barrel. The oil and water are respectively diverted to the required stations for processing through the reversing of the three-way reversing valve, the water is discharged to one side, and the oil is transported to the oil storage barrel by the first pump for storage.

[0017] In order to prevent the oil spill from blocking the first water outlet and the first oil outlet of the inner barrel, some embodiments are preferred, wherein the oil inlet pipe is connected to the external oil inlet pipe, a filter area is provided on the oil inlet pipe, a multi-layer filter plate is provided in the filter area, a second pump is provided on the oil inlet pipe, and the filter area is located between the oil inlet pipe and the second pump. The second pump transports the oil spill from the sea surface to the filter plate in the filter area for filtration, filters out the oil spill, and then transports the oil into the inner barrel, reducing the difficulty of separation and increasing the separation efficiency.

[0018] In order to prevent water from entering the oil storage barrel through the first oil outlet and the second oil outlet, in some preferred embodiments, a filter membrane is provided on the second oil outlet, and the filter membrane is used to pass oil but not water. By providing a filter membrane on the second oil outlet, the filter membrane has the function of passing oil but not water, thereby preventing residual water from entering the oil storage barrel.

[0019] In order to quickly deliver the oil to the inner barrel, in some preferred embodiments, the outer barrel is provided with an exhaust pipe connected to the inner barrel. When the oil-water mixture is heated and dispersed, the exhaust pipe can be used for deflation.

[0020] A method for cleaning and recovering an offshore oil spill using the above-mentioned device and recovery method, wherein the specific operation steps are as follows:

[0021] S1, the control unit controls the second pump to start, and the oil-water mixture is filtered to remove impurities through the filter plate, and then transported to the inner barrel through the oil inlet pipe;

[0022] S2, the control unit controls the ultrasonic disperser to work and disperse and heat the oil-water mixture, and the oil-water mixture is ready for stratification;

[0023] S3, the control unit controls the driving mechanism to drive the inner barrel to rise until the first water outlet and the second water outlet correspond and open, the water layer enters the upper cavity of the separation barrel through the first water outlet and the second water outlet, and then distributes the water to the lower cavity through the liquid distribution plate, and then the water absorbs the oil through the oil absorption material, and the water is separated and discharged from the discharge port to the three-way reversing valve, and then discharged to the outside;

[0024] S4. When the water layer drops, the density sensor is triggered at the oil-water boundary and sends a signal to the control unit. The control unit controls the inner barrel to rise, and the first water outlet and the second water outlet are staggered and blocked until the first oil outlet and the second oil outlet correspond and open, and the oil layer is discharged into the oil storage barrel through the first oil outlet and the second oil outlet until the liquid level sensor triggers a signal. The control unit controls the driving mechanism to drive the inner barrel to drop. As the inner barrel drops, when the first water outlet and the second water outlet correspond and open, the remaining water enters the upper cavity of the separation barrel through the first water outlet and the second water outlet. Finally, the inner barrel and the outer barrel return to their initial positions. At this time, the first water outlet and the second water outlet are staggered and blocked, and the first oil outlet and the second oil outlet are staggered and blocked;

[0025] S5. Control the three-way reversing valve to connect the drain port and the first pump, start the first pump, press the cover shell, drive the cover shell and the liquid distribution plate to move in the separation barrel and squeeze the oil absorbing material, and the oil is discharged through the drain port and transported to the oil storage barrel by the first pump.

[0026] The beneficial effects of the present invention are as follows: when the offshore oil spill cleaning and recovery device and the recovery method of the present invention are in use, the ultrasonic disperser inside the inner barrel is used to dissipate heat and heat the oil-water mixture, thereby reducing the viscosity of the oil and accelerating the stratification of oil and water. The control unit then controls the driving mechanism to drive the inner barrel to rise or fall in the outer barrel, thereby realizing corresponding connection or staggered sealing of the first water outlet and the second water outlet, and corresponding connection or staggered sealing of the first oil outlet and the second oil outlet, and the stratified water is sucked out again through the separation barrel, and the stratified oil is stored in the oil storage barrel, thereby realizing rapid separation of oil and water on the sea surface, with high separation efficiency, protecting the environment, and maintaining the ecological balance, thereby avoiding the problems of low separation efficiency, general separation effect, and limitation of scene usage of traditional oil-water separators. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0028] Figure 1 It is a schematic diagram of the structure of the present invention;

[0029] Figure 2 yes Figure 1 A partial enlarged view of middle A;

[0030] Figure 3 yes Figure 1 A partial enlarged view of B.

[0031] In the figure: 1, inner barrel, 101, first oil outlet, 102, first water outlet, 103, density sensor, 104, liquid level sensor, 105, ultrasonic disperser;

[0032] 2. outer barrel, 201. second oil outlet, 202. second water outlet, 203. oil inlet pipe, 204. filter plate, 205. second pump, 206. filter membrane, 207. exhaust pipe;

[0033] 3. Driving mechanism;

[0034] 4. Oil storage barrels;

[0035] 5. separation barrel, 501. liquid distribution plate, 5011. liquid distribution area, 5012. blocking area, 502. upper cavity, 503. lower cavity, 504. oil absorption material, 505. liquid discharge port, 506. cover shell, 507. sealing strip, 508. three-way reversing valve, 509. first pump, 510. partition;

[0036] 6. Control unit. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with embodiments:

[0038] The present invention is not limited to the following specific embodiments. A person skilled in the art can implement the present invention in various other specific embodiments according to the contents disclosed in the present invention, or any simple changes or modifications made to the design structure and ideas of the present invention fall within the protection scope of the present invention. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0041] Example 1

[0042] like Figure 1-3 As shown, a marine oil spill cleaning and recovery device comprises:

[0043] The inner barrel 1 has a first oil outlet 101 and a first water outlet 102 at its bottom, the first oil outlet 101 and the first water outlet 102 penetrate the inner wall and the outer wall of the inner barrel 1, are located at the same horizontal plane of the inner barrel 1, and are at the same height. A density sensor 103 is magnetically attracted on the inner wall of the inner barrel 1, and the density sensor 103 is arranged above the first water outlet 102. A liquid level sensor 104 is arranged at the bottom of the inner barrel 1, and an ultrasonic disperser 105 is arranged inside the inner barrel 1. During the ultrasonic dispersion process, the ultrasonic disperser 105 generates cavitation in the liquid due to the ultrasonic wave, that is, the micro-bubbles expand and contract rapidly under the action of the ultrasonic wave, which will generate local high temperature and high pressure. These heat and pressure can be transferred to the surrounding liquid, thereby causing the temperature of the oil-water mixture to rise, reducing the viscosity of the oil in the oil-water mixture, accelerating the rate of oil-water stratification, and effectively eliminating bubbles.

[0044] The outer barrel 2 is sleeved outside the inner barrel 1, and the outer peripheral wall of the outer barrel 2 is respectively provided with a second oil outlet 201 and a second water outlet 202, the second water outlet 202 is located below the second oil outlet 201, and the second water outlet 202 is located at the second oil outlet 201 and is staggered with each other, and the outer barrel 2 is provided with an oil inlet pipe 203 connected with the inner barrel 1, and the oil inlet pipe 203 on the outer barrel 2 is connected with the external oil inlet pipe 203, and a filtering area is provided on the oil inlet pipe 203, through A multi-layer filter plate 204 is arranged in the filter area, a second pump 205 is arranged on the oil inlet pipe 203, the filter area is located between the oil inlet pipe 203 and the second pump 205, an exhaust pipe 207 connected to the inner barrel 1 is arranged on the outer barrel 2, and a filter membrane 206 is arranged on the second oil outlet 201. The filter membrane 206 is used to pass oil but not water. The material of the filter membrane 206 is nylon or polytetrafluoroethylene. The filter membrane 206 is a modified oil-water separation membrane, which is mainly used to modify the surface;

[0045] In this embodiment, the driving mechanism 3 is a cylinder, which is fixedly installed above the outer barrel 2. The cylinder is used to drive the inner barrel 1 to move in the outer barrel 2 and realize the first oil outlet 101 and the second oil outlet 201 to be staggered, blocked or connected correspondingly, and the first water outlet 102 and the second water outlet 202 to be staggered, blocked or connected correspondingly;

[0046] The oil storage barrel 4 is connected to the second oil outlet 201;

[0047] The separation barrel 5 is connected to the second water outlet 202. A liquid distribution plate 501 is slidably arranged in the separation barrel 5. The liquid distribution plate 501 divides the separation barrel 5 into an upper cavity 502 and a lower cavity 503. An oil absorbing material 504 is arranged in the lower cavity 503. A liquid discharge port 505 is arranged at the bottom of the separation barrel 5. An annular partition plate 510 is arranged at the bottom of the separation barrel 5 below the oil absorbing material 504. The partition plate 510 is fixedly connected to the oil absorbing material 504. The annular partition plate 510 can fill the gap between the oil absorbing material 504 and the inner wall of the separation barrel 5 and reinforce the oil absorbing material 504. After the two are fixed, their own weight can ensure that when the oil-water mixture enters the separation barrel 5, the oil absorbing material 504 will not float due to the influx of water;

[0048] In this embodiment, the control unit 6 is a single chip microcomputer, which is respectively connected to the density sensor 103, the liquid level sensor 104, the ultrasonic disperser 105, and the driving mechanism 3 by signals.

[0049] And a three-way reversing valve 508, the first end of the three-way reversing valve 508 is connected to the discharge port 505, the second end of the three-way reversing valve 508 is connected to the oil storage barrel 4, the third end of the three-way reversing valve 508 is connected to the outside, a first pump 509 is arranged between the second end of the three-way reversing valve 508 and the oil storage barrel 4, and another filter membrane is also arranged on the third end of the three-way reversing valve 508. The other filter membrane here is only permeable to water but not oil. The other filter membrane is also a modified oil-water separation membrane, which is mainly used to modify the surface.

[0050] The liquid distribution plate 501 includes a plate body, which has a liquid distribution area 5011 and a sealing area 5012. The liquid distribution area 5011 is annular and is used to distribute water in the upper cavity 502 to the lower cavity 503. The sealing area 5012 is located in the liquid distribution area 5011. The oil absorption material 504 has an oil absorption area and a drainage area arranged in sequence. The oil absorption area is located below the liquid distribution area 5011, and the drainage area is located below the sealing area 5012. The separation barrel 5 is located in the upper cavity 502 and is slidably provided with a cover shell 506. A water outlet pipe is connected between the cover shell 506 and the second water outlet 202, and a sealing strip 507 is provided between the cover shell 506 and the inner peripheral wall of the separation barrel 5.

[0051] Example 2

[0052] Example 2 is a separation method using the equipment in Example 1, specifically: a method using a marine oil spill cleaning and recovery device and a recovery method as described above, and the specific operating steps are as follows:

[0053] S1, the control unit 6 controls the second pump 205 to start, and the oil-water mixture is filtered through the filter plate 204 to remove impurities, and is transported to the inner barrel 1 through the oil inlet pipe 203;

[0054] S2, the control unit 6 controls the ultrasonic disperser 105 to work and disperse and heat the oil-water mixture for a period of time until the oil-water mixture is completely separated;

[0055] S3, the control unit 6 controls the driving mechanism 3 to drive the inner barrel 1 to rise until the first water outlet 102 and the second water outlet 202 correspond and open, and the water layer enters the upper cavity 502 of the separation barrel 5 through the first water outlet 102 and the second water outlet 202, and then distributes the water to the lower cavity 503 through the liquid distribution plate 501, and then absorbs the oil through the oil absorption material 504, and the water is separated from the discharge port 505 to the three-way reversing valve 508, and then discharged to the outside;

[0056] S4, when the water layer drops, the density sensor 103 is triggered at the oil-water boundary and sends a signal to the control unit 6, the control unit 6 controls the inner barrel 1 to rise, the first water outlet 102 and the second water outlet 202 are staggered and blocked, until the first oil outlet 101 and the second oil outlet 201 correspond and open, the oil layer is discharged into the oil storage barrel 4 through the first oil outlet 101 and the second oil outlet 201, until the liquid level sensor 104 triggers a signal, the control unit 6 controls the driving mechanism 3 to drive the inner barrel 1 to drop, as the inner barrel 1 drops, the first oil outlet 101 and the second oil outlet 201 are staggered and blocked, when the first water outlet 102 and the second water outlet 202 correspond and open again, the remaining water enters the upper cavity 502 of the separation barrel 5 through the first water outlet 102 and the second water outlet 202, and finally, the inner barrel 1 and the outer barrel 2 return to their initial positions, at which time the first water outlet 102 and the second water outlet 202 are staggered and blocked;

[0057] S5. Control the three-way reversing valve 508 to connect the drain port 505 and the first pump 509, start the first pump 509, press the cover shell 506, drive the cover shell 506 and the liquid distribution plate 501 to move in the separation barrel 5 and squeeze the oil absorbing material 504, and the oil is discharged through the drain port 505 and transported to the oil storage barrel 4 by the first pump 509.

[0058] The above-mentioned ideal embodiments of the present invention are for inspiration. Through the above-mentioned description, relevant staff can make various changes and modifications without departing from the technical idea of ​​the present invention. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A marine oil spill cleaning and recovery device, characterized in that: include: An inner barrel (1), wherein the bottom of the outer peripheral wall thereof is respectively provided with a first oil outlet (101) and a first water outlet (102) which are communicated with the interior, wherein the first oil outlet (101) and the first water outlet (102) are located at the same horizontal plane of the inner barrel (1), a density sensor (103) is provided on the inner peripheral wall of the inner barrel (1), and the density sensor (103) is located above the first water outlet (102), a liquid level sensor (104) is provided at the bottom of the inner barrel (1), and an ultrasonic disperser (105) is provided inside the inner barrel (1); An outer barrel (2) is sleeved outside the inner barrel (1), a second oil outlet (201) and a second water outlet (202) are respectively arranged on the outer peripheral wall of the outer barrel (2), the second water outlet (202) is located below the second oil outlet (201), and an oil inlet pipe (203) connected to the inner barrel (1) is arranged on the outer barrel (2); A driving mechanism (3) is arranged on the outer barrel (2), and is used to drive the inner barrel (1) to move in the outer barrel (2) and realize staggered blocking or corresponding communication between the first oil outlet (101) and the second oil outlet (201), and staggered blocking or corresponding communication between the first water outlet (102) and the second water outlet (202); An oil storage barrel (4) which is in communication with the second oil outlet (201); A separation barrel (5) is connected to the second water outlet (202), a liquid distribution plate (501) is slidably arranged in the separation barrel (5), the liquid distribution plate (501) divides the separation barrel (5) into an upper cavity (502) and a lower cavity (503), an oil absorbing material (504) is arranged in the lower cavity (503), and a liquid discharge port (505) is arranged at the bottom of the separation barrel (5); The control unit (6) is respectively connected to the density sensor (103), the liquid level sensor (104), the ultrasonic disperser (105), and the driving mechanism (3) via signals.

2. The offshore oil spill cleaning and recovery device according to claim 1, characterized in that: The liquid distribution plate (501) comprises a plate body, wherein the plate body has a liquid distribution area (5011) and a blocking area (5012), wherein the liquid distribution area (5011) is annular and is used to distribute water in the upper cavity (502) to the lower cavity (503), and the blocking area (5012) is located in the liquid distribution area (5011).

3. The offshore oil spill cleaning and recovery device according to claim 2, characterized in that: The oil absorbing material (504) has an oil absorbing area and a drainage area which are arranged in sequence, wherein the oil absorbing area is located below the liquid distribution area (5011), and the drainage area is located below the blocking area (5012).

4. The offshore oil spill cleaning and recovery device according to claim 3, characterized in that: The separation barrel (5) is slidably provided with a cover shell (506) in the upper cavity (502), and a water outlet pipe is connected between the cover shell (506) and the second water outlet (202).

5. The offshore oil spill cleaning and recovery device according to claim 4, characterized in that: A sealing strip (507) is provided between the cover shell (506) and the inner peripheral wall of the separation barrel (5).

6. A marine oil spill cleaning and recovery device according to any one of claims 1 to 5, characterized in that: It also includes a three-way reversing valve (508), a first end of the three-way reversing valve (508) is connected to the discharge port (505), a second end of the three-way reversing valve (508) is connected to the oil storage barrel (4), a third end of the three-way reversing valve (508) is connected to the outside, and a first pump (509) is provided between the second end of the three-way reversing valve (508) and the oil storage barrel (4).

7. The offshore oil spill cleaning and recovery device according to claim 1, characterized in that: The oil inlet pipe (203) is connected to an external oil inlet pipe (203), a filter area is provided on the oil inlet pipe (203), a multi-layer filter plate (204) is provided in the filter area, a second pump (205) is provided on the oil inlet pipe (203), and the filter area is located between the oil inlet pipe (203) and the second pump (205).

8. The offshore oil spill cleaning and recovery device according to claim 1, characterized in that: The second oil outlet (201) is provided with a filter membrane (206), and the filter membrane (206) is used to pass oil but not water.

9. The offshore oil spill cleaning and recovery device according to claim 1, characterized in that: The outer barrel (2) is provided with an exhaust pipe (207) which is in communication with the inner barrel (1).

10. A marine oil spill cleaning and recovery device and a recovery method thereof according to any one of claims 1 to 9, characterized in that: The specific steps are as follows: S1, the control unit (6) controls the second pump (205) to start, and filters the oil-water mixture through the filter plate (204) to remove impurities, and transports the mixture to the inner barrel (1) through the oil inlet pipe (203); S2, the control unit (6) controls the ultrasonic disperser (105) to work and disperse and heat the oil-water mixture, and the oil-water mixture is ready for stratification; S3, the control unit (6) controls the driving mechanism (3) to drive the inner barrel (1) to rise until the first water outlet (102) and the second water outlet (202) correspond to each other and open, and the water layer enters the upper cavity (502) of the separation barrel (5) through the first water outlet (102) and the second water outlet (202), and then distributes the water to the lower cavity (503) through the liquid distribution plate (501), and the water absorbs oil through the oil absorption material (504), and the water is separated and flows from the discharge port (505) to the three-way reversing valve (508), and then discharged to the outside; S4, when the water layer drops, the density sensor (103) is triggered at the oil-water boundary and sends a signal to the control unit (6), the control unit (6) controls the inner barrel (1) to rise, the first water outlet (102) and the second water outlet (202) are staggered and blocked, until the first oil outlet (101) and the second oil outlet (201) correspond and open, the oil layer is discharged into the oil storage barrel (4) through the first oil outlet (101) and the second oil outlet (201), until the liquid level sensor (104) triggers a signal, the control unit (6) controls The driving mechanism (3) drives the inner barrel (1) to descend. As the inner barrel (1) descends, when the first water outlet (102) and the second water outlet (202) correspond and open, the remaining water enters the upper cavity (502) of the separation barrel (5) through the first water outlet (102) and the second water outlet (202). Finally, the inner barrel (1) and the outer barrel (2) return to their initial positions. At this time, the first water outlet (102) and the second water outlet (202) are staggered and blocked, and the first oil outlet (101) and the second oil outlet (201) are staggered and blocked. S5. Control the three-way reversing valve (508) to connect the liquid discharge port (505) and the first pump (509), start the first pump (509), press the cover (506), drive the cover (506) and the liquid distribution plate (501) to move in the separation barrel (5) and squeeze the oil absorbing material (504), and the oil is discharged through the liquid discharge port (505) and transported to the oil storage barrel (4) by the first pump (509).

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