CN115649369A - A water surface oil spill recovery device for a collection ship and its application method - Google Patents

Abstract

The invention provides a water surface spilled oil recovery device for a collection ship and a using method thereof, and belongs to the technical field of marine spilled oil recovery. The water pumping device comprises a floating cylinder, a motor, a communicating pipe, a conical pipe, a second filter screen, an oil discharge pipe and a water pumping mechanism, wherein a plurality of water flowing holes are formed in the side surface of the floating cylinder, a first rotating shaft is vertically arranged in the floating cylinder in a rotating mode, the motor is fixedly arranged on the floating cylinder, the motor is in transmission connection with the first rotating pump, the communicating pipe is arranged on the lower side surface of the floating cylinder, the conical pipe is fixedly arranged in the communicating pipe, the lower end of the conical pipe is rotatably provided with a filter cylinder, the lower end of the first rotating shaft is fixedly connected with the filter cylinder, the second filter screen is rotatably arranged at the lower end of the filter cylinder, a hydrophilic and oleophobic membrane is arranged on the upper side surface of the second filter screen, the oil discharge pipe is fixedly arranged in the communicating pipe, the upper end of the oil discharge pipe is communicated with the second filter screen, and the water pumping mechanism can pump water at the upper end of the communicating pipe to the lower end. The invention can automatically collect the oil spill on the water surface, and has simple operation and high recovery efficiency.

Description

A water surface oil spill recovery device for a collection ship and its application method

technical field

The invention belongs to the technical field of marine oil spill recovery, and relates to a water surface oil spill recovery device for a collection ship and a method for using the same.

Background technique

The development and utilization of oil has greatly benefited human life, but in the process of offshore oil exploitation and transportation, frequent leakage accidents not only caused a certain loss of resources, but also greatly polluted the marine ecosystem, and most of this oil leakage is High viscosity crude oil is extremely difficult to prevent and recover.

At present, the commonly used oil spill recovery method is to first use the oil boom to trap the oil spill to prevent it from spreading, and then recover the oil manually or use an oil spill recovery machine. The traditional oil spill recovery device has uncontrolled movement and small oil storage capacity. 1. The purity of the recovered oil is low, and the recovery capacity will be affected by factors such as the amount of oil spilled, the sea state and meteorological conditions, and the recovery efficiency is low.

Contents of the invention

The purpose of the present invention is to solve the above-mentioned problems in the existing technology, and propose a water surface oil spill recovery device for a collection ship and its use method, which can automatically collect the oil spill on the water surface, with simple operation and high recovery efficiency.

The purpose of the present invention can be achieved through the following technical solutions:

A water surface oil spill recovery device for a collection ship, the collection ship is provided with an oil spill tank, the collection ship is provided with an electric winch and an oil suction pump, the winch of the electric winch is wound with a pull rope, and the pull rope There are several floating blocks on the top, and the oil suction pump is connected with the oil pollution tank through a pipe. The surface oil spill recovery device includes: a buoy, the side of the buoy is provided with several water holes, and the inside of the buoy rotates vertically A first rotating shaft is provided, and the buoy is connected with the free end of the stay rope;

A motor, the motor is fixed on the buoy through the first fixing rod, and the motor is connected to the first rotating shaft through transmission;

A communicating pipe, which is vertically arranged on the lower side of the buoy;

A tapered pipe, the tapered pipe is coaxially fixed in the connecting pipe, the lower end of the tapered pipe is rotated to be provided with a filter cartridge, the lower end of the first rotating shaft extends into the filter cartridge and passes through the connecting rod and the filter cartridge Medial wall fixation;

The second filter screen, the second filter screen is rotatably arranged at the lower end of the filter cartridge, the second filter screen is provided with perforations, and the upper side of the second filter screen is provided with a hydrophilic and oleophobic film;

An oil discharge pipe, the oil discharge pipe is fixed in the connecting pipe, the upper end of the oil discharge pipe communicates with the perforation, and the lower end of the oil discharge pipe communicates with the oil suction pump through a connecting hose;

A water pumping mechanism, the water pumping mechanism is arranged at the lower end of the connecting pipe, and the water pumping mechanism can use the rotation of the first rotating shaft to pump the water at the upper end of the connecting pipe to the lower end.

Preferably, the pumping mechanism includes:

Bearings, the bearings rotate coaxially and are arranged on the outer side of the oil discharge pipe, and the outer sides of the bearings are provided with several blades along the circumference;

a second round tube, the second round tube is coaxially fixed on the outer side of the bearing through the third fixing rod;

A transmission structure, the transmission structure is arranged in the connecting pipe, and the transmission structure can use the rotation of the filter cartridge to drive the rotation of the second round pipe.

Preferably, the transmission structure includes:

A first round tube, the first round tube is coaxially fixed on the outside of the filter cartridge through a support rod, and a first ring gear is arranged on the outside of the first round tube;

a second ring gear, the second ring gear is fixed on the outside of the second circular tube;

The second rotating shaft, the second rotating shaft is vertically rotated and arranged on the inner side wall of the connecting pipe, the upper and lower ends of the second rotating shaft are respectively provided with a first gear and a second gear, and the first gear and the first ring gear Mesh connection, the second gear is meshed with the second ring gear.

Preferably, several rotating vanes are arranged on the first rotating shaft in the buoy in the circumferential direction.

Preferably, a first filter screen is coaxially fixed on the first rotating shaft in the filter cartridge, a flow gap is formed between the first filter screen and the inner side wall of the filter cartridge, and the upper side of the first filter screen Has an oleophilic and hydrophobic membrane.

Preferably, the first filter net is in a convex spherical shape, the second filter net is in a downward convex spherical shape, and a separation cavity is formed between the first filter net and the second filter net.

Preferably, the lower end of the first rotating shaft extends into the oil discharge pipe through the perforation, and the lower end of the first rotating shaft is provided with a helical guide groove.

Preferably, an annular plate is horizontally provided on the outer side of the communicating pipe, and several through holes are opened on the annular plate.

A method for using a water surface oil spill recovery device for a collection ship, comprising the following steps:

S1. Drive the collection ship to the oil spill sea area, then start the electric winch, release the pull rope, and float the buoy on the water surface. At this time, the center of the water hole is flush with the water surface, and the oil spill and sea water flow into the connecting pipe through the water hole;

S2. Start the motor, drive the first rotating shaft to rotate, and use the pumping mechanism to pump the water and overflow oil from the upper end of the connecting pipe to the lower end, so that a swirling flow is generated in the connecting pipe, and the oil with a lower density moves closer to the middle and enters the conical pipe, and then enters the into the filter cartridge;

S3. The first rotating shaft drives the filter cartridge to rotate, so that the oil spilled water entering the filter cartridge generates swirling flow again, the water passes through the filter cartridge outward, and the oil moves downward to the second filter net;

S4. Since the second filter screen is provided with a hydrophilic and oleophobic film, the water is discharged downward through the second filter screen, and the oil enters the oil discharge pipe through the perforation, starts the oil suction pump, and drains the oil spilled in the oil discharge pipe through the connecting hose Suction into the oil pollution tank.

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

1. Drive the collection ship to the oil spill area, then release the pull rope on the electric winch, place the buoy on the sea surface, the oil spill and water on the water surface enter the connecting pipe through the water hole, and start the motor at the same time to drive the first rotating shaft Rotating, swirling flow is generated in the connecting pipe, and the spilled oil with lower density moves closer to the middle and flows into the filter cartridge through the conical pipe. The filter cartridge flows out, and the spilled oil flows downward to the second filter screen. Since the second filter screen is equipped with a hydrophilic and oleophobic film, the water flows downward through the second filter screen, and the spilled oil flows into the oil discharge pipe, and the suction is started. The oil pump, and then connect the hose to suck the spilled oil in the oil discharge pipe into the oil pollution tank, which greatly increases the storage capacity of the spilled oil. With the movement of the collection ship, the continuous recovery of the spilled oil can be realized and the recovery efficiency can be improved; in addition , Through multiple centrifugation and double filtration, the spilled oil and water are fully separated, and the purity of the collected oil is improved;

2. Start the motor to drive the first rotating shaft and the filter cartridge to rotate, and the first round tube and the first ring gear on the outside of the filter cartridge to rotate accordingly, thereby driving the first gear to rotate, and the second rotating shaft to drive the second gear to rotate synchronously. The gear drives the second ring gear and the second circular tube to rotate, so that the blades on the second circular tube will rotate, and the seawater at the upper end of the connecting pipe will be sucked downward, so that the upper end of the connecting pipe will continuously produce a siphon effect, and the oil spilled water around the buoy will Continuously flow into the connecting pipe through the water hole to realize circulating oil collection;

3. Since several rotating vanes are located above the conical pipe, when the first rotating shaft drives several rotating vanes to rotate, the oil spilled water at the upper end of the conical pipe will generate a swirl flow, the water will flow outward, and the oil will flow inward Concentratedly sucked into the conical pipe to realize the preliminary separation of spilled oil and water;

4. The oil-spilled water after preliminary separation enters the first filter net. Since the first filter net is equipped with an oil-friendly and hydrophobic film, the spilled oil flows downward through the first filter net. Since the first filter net is convex Curved surface shape, water flows outwards and downwards through the flow gap along the first filter net to around the side wall of the filter cartridge, and at the same time, the rotation of the filter cartridge generates a swirling flow, so that the water around the filter cartridge flows out of the filter cartridge, realizing the protection of oil spilled water secondary separation;

5. The spilled oil slides down to the perforation position at the bottom along the second filter screen, and the spiral guide groove on the first shaft rotates, pushing the spilled oil around the perforation down into the oil discharge pipe, so that the spilled oil in the separation chamber Drain quickly to prevent spilled oil from spilling upwards.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the sectional view of A-A place among Fig. 1;

Fig. 3 is the sectional view of B-B place among Fig. 1;

Fig. 4 is the sectional view of C-C place among Fig. 1;

Fig. 5 is a state diagram of the present invention on a collecting ship.

In the figure, 1 buoy; 11, water hole; 12, first fixed rod; 13, connecting pipe; 14, ring plate; 141, through hole; 2, motor; 21, first rotating shaft; 23. Spiral guide groove; 24. The first filter screen; 241. Flow gap; 25. Connecting rod; 3. Conical pipe; 31. Second fixing rod; 4. Filter cartridge; 41. Support rod; Circular pipe; 421, the first ring gear; 43, separation chamber; 5, oil discharge pipe; 51, the second filter screen; 511, perforation; 6, bearing; 61, blade; 62, the second round pipe; 621, the second Ring gear; 63, third fixed rod; 7, second rotating shaft; 71, first gear; 72, second gear; 8, floating block; 81, pull rope; 82, connecting hose; 9, collecting ship; 91 , Oil pollution tank; 92, electric winch; 93, oil suction pump.

Detailed ways

The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

As shown in Figures 1 to 5, a water surface oil spill recovery device for a collection ship, the collection ship 9 is provided with an oil pollution tank 91, and the collection ship 9 is provided with an electric winch 92 and an oil suction pump 93, so The winch of the electric winch 92 is wound with a stay rope 81, the stay rope 81 is provided with several floating blocks 8, the outlet of the oil suction pump 93 is connected with the oil pollution tank 91 through a pipe, and the inlet of the oil suction pump 92 A connecting hose 82 is provided, and the connecting hose 82 is connected under several floating blocks 8 in sequence.

The water surface oil spill recovery device includes a buoy 1, a motor 2, a connecting pipe 13, a tapered pipe 3, a second filter screen 51, an oil discharge pipe 5 and a pumping mechanism.

The buoy 1 is in the shape of a cylinder, and the side of the buoy 1 is provided with several water holes 11 along the circumferential direction. A rotating shaft 21, the buoy 1 is connected with the free end of the stay rope 81.

The motor 2 is fixed on the buoy 1 through the first fixing rod 12 , and the output shaft of the motor 2 is fixedly connected with the upper end of the first rotating shaft 21 .

The first rotating shaft 21 located in the buoy 1 is provided with several rotating blades 22 along the circumference, because the several rotating blades are located above the tapered pipe.

The communication pipe 13 is vertically arranged on the lower side of the buoy 1 , preferably, the lower end of the communication pipe 13 is in the shape of a flared horn.

The tapered pipe 3 is coaxially fixed in the connecting pipe 13 through the second fixing rod 31, the lower end of the tapered pipe 3 is rotated to be provided with a filter cartridge 4, and the lower end of the first rotating shaft 21 extends to the filter cartridge 4 Inner and fixedly connected with the inner side wall of the filter cartridge 4 through the connecting rod 25 .

Specifically, a first filter screen 24 is coaxially fixed on the first rotating shaft 21 in the filter cartridge 4. Preferably, the first filter screen 24 is in a convex spherical shape, and the first filter screen 24 A flow gap 241 is formed between the inner side wall of the filter cartridge 4 , and the upper side of the first filter 24 is provided with an oleophilic and hydrophobic membrane, and the oleophilic and hydrophobic membrane is made of a material that is oil-permeable but not water-permeable.

The second filter screen 51 is rotatably arranged at the lower end of the filter cartridge 4, the second filter screen 51 is in a spherical shape convex downward, and a separation chamber 43 is formed between the first filter screen 24 and the second filter screen 51 , The bottom of the second filter 51 is provided with a perforation 511, and the upper side of the second filter 51 is provided with a hydrophilic and oleophobic film, and the hydrophilic and oleophobic film is made of a material that is permeable to water but not oil.

The oil discharge pipe 5 is fixed in the communication pipe 13, the upper end of the oil discharge pipe 5 communicates with the perforation 511, the lower end of the oil discharge pipe 5 communicates with the oil suction pump 93 through the connecting hose 82, and the first rotating shaft The lower end of the first rotating shaft 21 extends into the oil discharge pipe 5 through the perforation 511 , and the lower end of the first rotating shaft 21 is provided with a helical guide groove 23 . The spilled oil slides down along the second filter screen 51 to the perforation 511 at the bottom, and the spiral guide groove 23 on the first rotating shaft 21 rotates, pushing the spilled oil around the perforation 511 down into the oil discharge pipe 5, so that the separation chamber The spilled oil in the 43 is quickly discharged to prevent the spilled oil from overflowing upwards.

The water pumping mechanism is arranged at the lower end of the communication pipe 13, and the water pumping mechanism can use the rotation of the first rotating shaft 21 to pump the water from the upper end of the communication pipe 13 to the lower end.

Drive the collection ship to the oil spill area, then release the stay rope 81 on the electric winch 92, place the buoy 1 on the sea surface, the oil spill and water on the water surface enter the connecting pipe 13 through the water hole 11, and start the motor 2 at the same time , drive the first rotating shaft 21 to rotate, and the first rotating shaft 21 drives several rotating blades 22 to rotate, so that the oil spilled water at the upper end of the conical pipe 3 generates swirling flow, the water flows outward, and the less dense oil spilled is concentrated inward Inhale into the conical pipe 3 to realize the preliminary separation of spilled oil and water;

The oil spilled water after preliminary separation enters on the first filter screen 24, because the first filter screen 24 is provided with lipophilic and hydrophobic film, the spilled oil passes through the first filter screen 24 and flows downward concentratedly, because the first filter screen 24 In the shape of an upwardly convex curved surface, the water flows outward and downward through the flow gap along the first filter screen 24 to around the side wall of the filter cartridge 4, and at the same time, the first rotating shaft 21 drives the filter cartridge 4 to rotate to generate a swirling flow, and the water passes through the filter The barrel 4 flows out, and the spilled oil flows downwards to the second filter screen 51 to realize the secondary separation of the spilled oil and water. Since the second filter screen 51 is provided with a hydrophilic and oleophobic film, the water passes through the second filter screen 51 to Flow down, the spilled oil flows into the oil discharge pipe 5, start the oil suction pump 93, then the spilled oil in the oil discharge pipe 5 is sucked into the oil pollution tank 91 through the connecting hose 82, greatly improving the storage capacity of the spilled oil, along with The movement of the collection ship 9 can realize the continuous recovery of spilled oil and improve recovery efficiency.

In this embodiment, the pumping mechanism includes a bearing 6, a second round pipe 62 and a transmission structure.

The bearing 6 is coaxially arranged on the outer side of the oil discharge pipe 5 , and several blades 61 are arranged on the outer side of the bearing 6 along the circumferential direction.

The second round tube 62 is coaxially fixed on the outer side of the bearing 6 through the third fixing rod 63 , and the second ring gear 621 is arranged on the outer side of the second round tube 62 .

The transmission structure is arranged in the communication pipe 13 , and the transmission structure includes a first round pipe 42 and a second rotating shaft 7 .

The first round pipe 42 is coaxially fixed on the outer side of the filter cartridge 4 through the support rod 41 , and the first ring gear 421 is arranged on the outer side of the first round pipe 42 .

The second rotating shaft 7 is vertically rotated and arranged on the inner side wall of the connecting pipe 13, and the upper and lower ends of the second rotating shaft 7 are respectively provided with a first gear 71 and a second gear 72, and the first gear 71 and the first gear 71 are connected to each other. The ring gear 421 is in mesh connection, and the second gear 72 is in mesh connection with the second ring gear 621 .

Start the motor 2 to drive the first rotating shaft 21 and the filter cartridge 4 to rotate, and the first circular tube 42 and the first ring gear 421 on the outside of the filter cartridge 4 rotate accordingly, thereby driving the first gear 71 to rotate, and the second rotating shaft 7 drives the second gear 71 to rotate. The gear 72 rotates synchronously, and the second gear 72 drives the second ring gear 621 and the second round pipe 62 to rotate, so that the blade 61 on the second round pipe 62 rotates, and the seawater on the upper end of the connecting pipe 13 will be sucked downward, so that the connecting pipe The upper end of 13 continuously produces a siphon effect, so that the oil spilled water around the buoy 1 continuously flows into the connecting pipe 13 through the water hole 11, so as to realize circulating oil collection.

Preferably, an annular plate 14 is horizontally provided on the outer side of the connecting pipe 13, and several through holes 141 are opened on the said annular plate 14. When the waves are large, the ring plate 14 can play a balancing role, avoiding the waves from overturning the buoy 1 and improving the stability of the device.

The method for using the above-mentioned water surface oil spill recovery device for collecting ships comprises the following steps:

S1. Drive the collection ship 9 to the oil spill sea area, then start the electric winch 92, release the stay rope 81, and float the buoy 1 on the water surface. At this time, the center of the flow hole 11 is flush with the water surface, and the oil spill and sea water pass through the flow hole 11 flows into the connecting pipe 13;

S2, start the motor 2, drive the first rotating shaft 21 to rotate, use the pumping mechanism to pump the water and overflow oil from the upper end of the connecting pipe 13 to the lower end, so that a swirling flow is generated in the connecting pipe 13, and the oil with a lower density moves closer to the middle and enters the cone shaped tube 3, and then enter the filter cartridge 4;

S3, the first rotating shaft 21 drives the filter cartridge 4 to rotate, so that the oil spilled water entering the filter cartridge 4 generates swirl again, the water passes through the filter cartridge 4 outward, and the oil moves downward to the second filter screen 51;

S4. Since the second filter screen 51 is provided with a hydrophilic and oleophobic film, the water is discharged downward through the second filter screen 51, and the oil enters the oil discharge pipe 5 through the perforation. The spilled oil in the oil discharge pipe 5 is sucked into the oil pollution tank 91 .

Start the collection ship 9 to move slowly in the oil spill area, constantly change the position of the buoy 1, use the pumping mechanism to recover and suck the spilled oil on the water surface around the buoy 1 into the oil pollution tank 91, increase the storage capacity of the spilled oil, and make the device continuously Recovery, improve recovery efficiency; in addition, through multiple centrifugation and double filtration, the spilled oil and water are fully separated, and the purity of the collected oil is improved.

In the description of this patent, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for It is convenient to describe this patent and simplify the description, but not to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting this patent.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Claims (9)

1. The utility model provides a surface of water oil spilling recovery unit for collection ship, be equipped with greasy dirt cabin (91) in collection ship (9), be equipped with electric winch (92) and oil suction pump (93) on collection ship (9), the winding has stay cord (81) on the capstan winch of electric winch (92), be equipped with a plurality of kicking block (8) on stay cord (81), oil suction pump (93) are linked together through pipe and greasy dirt cabin (91), its characterized in that, surface of water oil spilling recovery unit includes: the device comprises a buoy (1), wherein a plurality of drain holes (11) are formed in the side surface of the buoy (1), a first rotating shaft (21) is vertically and rotatably arranged in the buoy (1), and the buoy (1) is connected with the free end of a pull rope (81);

the motor (2) is fixedly arranged on the buoy (1) through a first fixing rod (12), and the motor (2) is in transmission connection with the first rotary pump (21);

the communicating pipe (13), the said communicating pipe (13) is set up on the underside of the buoy (1) vertically;

the conical pipe (3) is coaxially and fixedly arranged in the communicating pipe (13), the lower end of the conical pipe (3) is rotatably provided with the filter cylinder (4), and the lower end of the first rotating shaft (21) extends into the filter cylinder (4) and is fixedly connected with the inner side wall of the filter cylinder (4) through a connecting rod (25);

the second filter screen (51) is rotatably arranged at the lower end of the filter cylinder (4), a through hole (511) is formed in the second filter screen (51), and a hydrophilic oleophobic membrane is arranged on the upper side surface of the second filter screen (51);

the oil discharge pipe (5) is fixedly arranged in the communicating pipe (13), the upper end of the oil discharge pipe (5) is communicated with the through hole (511), and the lower end of the oil discharge pipe (5) is communicated with the oil suction pump (93) through a connecting hose (82);

the water pumping mechanism is arranged at the lower end of the communicating pipe (13), and the water pumping mechanism can pump water at the upper end of the communicating pipe (13) to the lower end by utilizing the rotation of the first rotating shaft (21).

2. A surface oil recovery device for a collection vessel according to claim 1, wherein the pumping mechanism comprises:

the bearing (6) is coaxially and rotatably arranged on the outer side of the oil discharge pipe (5), and a plurality of blades (61) are arranged on the outer side of the bearing (6) along the circumferential direction;

the second circular pipe (62), the said second circular pipe (62) is fixed outside the bearing (6) coaxially through the third dead lever (63);

the transmission structure is arranged in the communicating pipe (13), and the transmission structure can utilize the filter cartridge (4) to rotate to drive the second round pipe (62) to rotate.

3. A surface oil recovery device for a collection vessel according to claim 2, wherein the transmission structure comprises:

the first circular tube (42) is fixedly arranged on the outer side of the filter cylinder (4) through a support rod (41) in a coaxial mode, and a first gear ring (421) is arranged on the outer side of the first circular tube (42);

the second gear ring (621), the said second gear ring (621) is fixed on the outside of the second round tube (62);

second pivot (7), vertical rotation of second pivot (7) sets up on the inside wall of communicating pipe (13), the upper and lower end of second pivot (7) is equipped with first gear (71) and second gear (72) respectively, first gear (71) are connected with first ring gear (421) meshing, second gear (72) are connected with second ring gear (621) meshing.

4. A device for recovering oil spilled on the surface of a collection vessel according to claim 1, characterised in that the first rotor shaft (21) located inside the pontoon (1) is provided with a plurality of rotor blades (22) along the circumferential direction.

5. The device for recovering the spilled oil on the water surface of the collection ship according to claim 1, wherein a first filter screen (24) is coaxially and fixedly arranged on the first rotating shaft (21) in the filter cylinder (4), a flow gap (241) is formed between the first filter screen (24) and the inner side wall of the filter cylinder (4), and an oleophilic hydrophobic membrane is arranged on the upper side surface of the first filter screen (24).

6. A surface oil recovery device for a collection vessel according to claim 5, wherein the first filter (24) is convex spherical, the second filter (51) is convex spherical, and a separation chamber (43) is formed between the first filter (24) and the second filter (51).

7. A surface oil recovery device for a collection vessel according to claim 1, characterized in that the lower end of the first rotary shaft (21) extends through the through hole (511) into the oil drain pipe (5), and the lower end of the first rotary shaft (21) is provided with a spiral guide groove (23).

8. The device for recovering the oil spilled on the water surface of the collection ship according to claim 1, wherein a circular plate (14) is horizontally arranged on the outer side of the communication pipe (13), and a plurality of through holes (141) are formed in the circular plate (14).

9. Use of the device for recovering oil spilled on the surface of a collection vessel according to claim 1, characterised in that it comprises the following steps:

s1, driving a collection ship (9) to an oil spilling sea area, then starting an electric winch (92), releasing a pull rope (81), floating a buoy (1) on the water surface, leveling the center of a water flowing hole (11) with the water surface, and enabling oil spilling and seawater to flow into a communicating pipe (13) through the water flowing hole (11);

s2, starting a motor (2) to drive a first rotating shaft (21) to rotate, and pumping water and oil spill at the upper end of a communicating pipe (13) to the lower end by using a pumping mechanism to generate a rotational flow in the communicating pipe (13), wherein oil with lower density is gathered towards the middle and enters a conical pipe (3) and then enters a filter cartridge (4);

s3, the first rotating shaft (21) drives the filter cylinder (4) to rotate, so that oil spilling water entering the filter cylinder (4) generates rotational flow again, the water penetrates out of the filter cylinder (4), and the oil moves downwards to the second filter screen (51);

and S4, because the second filter screen (51) is provided with the hydrophilic oleophobic membrane, water passes through the second filter screen (51) and is discharged downwards, oil passes through the through hole and enters the oil discharge pipe (5), the oil suction pump (93) is started, and the overflowed oil in the oil discharge pipe (5) is sucked into the oil stain cabin (91) through the connecting hose (82).

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