Adjustable depth of water surface leaking oil salvage ship and its salvage method

Abstract

The application discloses a water surface leaked crude oil salvage ship with adjustable working depth and a salvage method thereof, which comprises a ship body, a crude oil salvage device arranged on the ship body and capable of horizontally sliding and rotating along the ship body, and a floating oil surrounding arm. The crude oil salvage device comprises a load-bearing frame rotatably connected with the ship body, a traction rear roller located at the rear end of the load-bearing frame, a traction front roller located at the front end of the load-bearing frame, a conveying belt wound on the traction front roller and the traction rear roller, a hydrophobic oil-absorbing sponge located on the outer side surface of the conveying belt, a detachable oil-extruding roller located at the front end of the load-bearing frame and used for extruding water in the hydrophobic oil-absorbing sponge, and a fixed oil-extruding roller located at the rear end of the load-bearing frame and used for extruding crude oil in the hydrophobic oil-absorbing sponge. The traction rear roller is driven to rotate, the conveying belt is driven to transmit by the traction front roller, the hydrophobic oil-absorbing sponge adsorbs the crude oil, and the crude oil is transported from front to back. The application improves the crude oil salvage efficiency and effectively recovers the leaked crude oil.

Description

Technical Field

[0001] This invention relates to a salvage vessel, and more particularly to a surface oil spill salvage vessel with adjustable operating depth and a salvage method thereof. Background Technology

[0002] During oil extraction and transportation, malfunctions in extraction and transportation equipment can lead to large-scale crude oil spills into waterways. Because crude oil is less dense than water, it floats on the surface. As the spill continues, the crude oil on the surface will spread outwards, and the thickness of the oil on the surface will decrease. The spilled crude oil will also drift into nearshore and inland waterways, making it difficult to contain and salvage the spilled crude oil in the later stages. Moreover, salvage operations require a high degree of adjustment of the operating depth and the maneuverability of the vessels.

[0003] Traditional recovery methods involve deploying absorbent material to the surface of the leaking water and manual retrieval. Large-scale crude oil spills consume a large amount of absorbent material, and the recovery and treatment of this material requires a significant amount of human resources. Manual retrieval tools are rudimentary, the working environment is dangerous, and the retrieval efficiency is low.

[0004] Existing technology (CN102351037A) discloses a marine crude oil salvage vessel. This vessel is characterized by: a port bow and a starboard bow forming a funnel shape, wider at the front and narrower at the rear; an oil inlet at the rear of the funnel; an oil collection tank located in the middle of the hull, with its bottom connected to seawater and its front connected to the oil inlet; an oil suction pipe on the water surface of the oil collection tank; a movable door at the oil inlet; and a bridge on the deck. The oil inlet is an inclined surface, lower at the front and higher at the rear, and the movable door is vertically positioned at the inlet, allowing it to be raised or lowered. However, this existing technology salvages a large amount of seawater and impurities along with the crude oil, resulting in low salvage efficiency.

[0005] Therefore, the above problems urgently need to be solved. Summary of the Invention

[0006] Purpose of the invention: The first objective of this invention is to provide a surface oil spill salvage vessel with adjustable operating depth and high oil salvage efficiency.

[0007] The second objective of this invention is to provide a salvage method for a surface oil spill salvage vessel with adjustable operating depth.

[0008] Technical Solution: To achieve the above objectives, this invention discloses an adjustable-depth oil spill salvage vessel, comprising a hull, an oil retrieval device mounted on the hull and capable of horizontally sliding and rotating along the hull, and an oil buoyancy boom located at the front end of the oil retrieval device. The oil retrieval device includes a load-bearing frame rotatably connected to the hull, a rear traction roller located at the rear end of the load-bearing frame, a front traction roller located at the front end of the load-bearing frame, a conveyor belt wound around the front and rear traction rollers, a hydrophobic oil-absorbing sponge located on the outer surface of the conveyor belt, a detachable oil-absorbing squeezing roller located at the front end of the load-bearing frame for squeezing water inside the hydrophobic oil-absorbing sponge, and a fixed squeezing roller located at the rear end of the load-bearing frame for squeezing crude oil inside the hydrophobic oil-absorbing sponge. The rear traction roller is driven to rotate, and the front traction roller drives the conveyor belt to drive the transmission. The hydrophobic oil-absorbing sponge absorbs crude oil and transports the crude oil from front to rear.

[0009] The oil slick is a pair of arc-shaped arms made of oleophobic hollow plastic. The two sides of the load-bearing frame are provided with slide rail grooves. Each slide rail groove is connected to a movable sliding buckle that can move back and forth along the slide rail groove. The oil slick is fitted on the movable sliding buckle and can float on the water surface and move along the slide rail groove.

[0010] Preferably, the ship's hull is equipped with an oil filter screen in the middle of the cabin. The oil filter screen includes a steel fixed frame and an oleophobic coated filter screen located within the steel fixed frame.

[0011] Furthermore, the bottom of the ship's cabin slopes downwards from the stern to the bow.

[0012] Furthermore, a rotating shaft is installed in the middle of the load-bearing frame, and traction trolleys are connected to both ends of the rotating shaft. The traction trolleys are located in horizontal grooves on both sides of the hull and drive the rotating shaft and the load-bearing frame to slide horizontally along the hull.

[0013] Preferably, a rotating servo motor is provided in the middle of the load-bearing frame. A drive gear is connected to the output shaft of the rotating servo motor. A rotating gear is provided in the middle of the rotating shaft. When the rotating servo motor is activated, it drives the drive gear to mesh with the rotating gear, thereby causing the load-bearing frame to rotate around the rotating shaft.

[0014] Furthermore, a traction servo motor is installed at the rear end of the load-bearing frame. The output shaft of the traction servo motor is connected to the traction rear roller via a belt. When the traction servo motor is activated, it drives the traction rear roller to rotate, thereby driving the conveyor belt.

[0015] Furthermore, it also includes an oil suction assembly for pumping crude oil from the hull, which includes a floating support that floats above the crude oil and an oil suction pipe located on the floating support, the oil suction pipe being connected to an external oil suction pump.

[0016] Preferably, the hull sidewall is provided with a drainage pipe for an external water pump, the inlet of which is located at the bottom of the hull and the outlet of which is located at the top of the hull.

[0017] The present invention discloses a salvage method for a surface oil spill salvage vessel with adjustable operating depth, comprising the following steps:

[0018] During the operation at the salvage site, the salvage vessel retracted its crude oil salvage equipment and oil slick.

[0019] When the salvage vessel arrives at the oil spill area, the floating oil containment arms are first installed on the oil retrieval device. The detachable oil-absorbing squeezing rollers are then fixed with bolts. The position of the detachable oil-absorbing squeezing rollers is adjusted to ensure that they are submerged slightly below the spilled oil, fully squeezing the hydrophobic oil-absorbing sponge. The traction trolley located in the horizontal sliding grooves on both sides of the hull moves the oil retrieval device towards the stern. Once it reaches the working position, it stops. The rudder is then activated to rotate and lower the oil retrieval device. The rotation angle is 0° to 30°. The operator can adjust the working angle according to the different floating states of the salvage vessel and the thickness of the spilled oil at the rescue site, ensuring that the hydrophobic oil-absorbing sponge, after squeezing out water, makes full contact with the spilled oil. After the floating oil containment arms on both sides of the oil retrieval device are placed in the water, the floating oil containment arms automatically adjust their position with the help of buoyancy through the sliding rail grooves and movable buckles, keeping them always floating on the water surface and surrounding the spilled oil in front of the operation.

[0020] During the salvage operation, the salvage vessel reverses to surround the floating crude oil with an oil slick, delivering the spilled oil to the working area of ​​the oil retrieval device. Because the oil slick automatically floats on the water surface, it prevents the crude oil from escaping the slick's enclosure. The traction control motor on the oil retrieval device is activated, driving the rear traction roller to rotate. This, in turn, drives the conveyor belt via the front traction roller. The hydrophobic oil-absorbing sponge begins its work as it passes through the conveyor belt. After being compressed by detachable oil-absorbing compression rollers, the conveyor belt rotates from bottom to top. From top to bottom and from back to front, the lower conveyor belt first enters the water and absorbs some water. The detachable oleophobic extrusion rollers squeeze the hydrophobic oil-absorbing sponge to squeeze out the excess water. The hydrophobic oil-absorbing sponge then comes into contact with the leaking crude oil, absorbs the leaking crude oil, and is conveyed by the conveyor belt to the fixed extrusion rollers. After being squeezed by the fixed extrusion rollers, 80% of the absorbed crude oil is discharged into the stern of the ship's hull. After the crude oil and water are filtered through the crude oil filter screen, they enter the forward hull of the salvage vessel. The oil suction pipe is always above the crude oil surface with the help of the buoyancy of the floating support.

[0021] After the salvage operation is completed, the salvage vessel retracts its crude oil salvage equipment and sails to the shore or alongside a transport ship. An external oil suction pump is connected to the oil suction pipe to suck up the oil. The floating support automatically adjusts its height based on buoyancy, ensuring that the height of the oil suction port remains consistent with the oil surface. After absorbing the upper layer of crude oil in the ship's hold, the small amount of water previously brought in by the hydrophobic oil-absorbing sponge can be treated and discharged through the drainage pipe and the ship's side water pump, completing the entire process.

[0022] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The present invention can not only carry out salvage operations when the oil spill layer is thick, but also salvage and treat the floating oil layer that is thin due to the lack of timely salvage of oil, thus saving manpower and material resources; The present invention allows for the reuse of hydrophobic oil-absorbing sponges, reducing working costs, enabling rapid emergency operations, and facilitating the handling of salvaged oil and maintenance of salvage vessels after the operation; The present invention allows for adjustment of the operating angle and the position of the detachable oil-absorbing squeezing rollers according to the different floating states of the salvage vessel and the thickness of the leaked oil at the emergency site, so that the hydrophobic oil-absorbing sponge can fully contact the leaked oil after squeezing out water, further improving the oil absorption capacity. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the crude oil retrieval device in the retracted state according to the present invention;

[0024] Figure 2 This is a schematic diagram of the crude oil retrieval device in the retrieval state according to the present invention;

[0025] Figure 3 This is a schematic diagram of the crude oil retrieval device in this invention;

[0026] Figure 4 This is a schematic diagram of the connection of the load-bearing frame in this invention. Detailed Implementation

[0027] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0028] like Figure 2 As shown, the present invention provides an adjustable-depth oil spill salvage vessel, comprising a hull 1, an oil retrieval device, an oil buoy 2, and an oil suction assembly. The oil retrieval device is mounted on the hull 1 and can slide horizontally along the hull 1. The oil retrieval device can rotate around the hull 1. The oil buoy 2 is located at the front end of the oil retrieval device.

[0029] A crude oil filter screen is installed in the middle of the hull of hull 1. This filter screen includes a steel fixed frame 11 and an oleophobic coated filter screen 12 located within the steel fixed frame. The steel fixed frame 11 is welded and fixed to the inner wall of hull 1. The bottom surface of the hull's inner hull slopes downwards from stern to bow. During coastal operations, leaked crude oil will contain solid impurities and water. Due to the high viscosity of crude oil, it will be carried into the hull during salvage and mixed together in the stern hull of the salvage vessel. The oleophobic coated filter screen 12 and steel fixed frame 11 in the middle of the hull are used to filter larger solid impurities in the crude oil, preventing damage to the oil suction pump during subsequent oil transfer. After being filtered by the filter screen, the crude oil and water enter the forward hull of the salvage vessel. The oil outlet pipe 17, aided by the buoyancy of the floating oleophobic hollow plastic ring 18, remains above the oil surface for subsequent processing. The oil suction assembly is used to extract crude oil from the hull. This assembly includes a floating support 20 that floats above the crude oil and an oil suction pipe 21 located on the floating support. An external oil suction pump is connected to the oil suction pipe 21. The floating support 20 automatically adjusts its height based on buoyancy, ensuring the suction port height remains consistent with the oil surface to guarantee efficient oil extraction. A drainage pipe 22 connected to an external water pump is located on the side wall of the hull 1. The inlet of this drainage pipe is located at the bottom of the hull, and the outlet is located above the hull. After absorbing the upper layer of crude oil in the hull, any small amount of water previously brought in by the hydrophobic oil-absorbing sponge can be treated and discharged through the drainage pipe and the water pump on the side of the hull, completing the entire process. The inner wall of the hull is coated with an oleophobic coating, preventing excessive oil residue buildup after entering the hull.

[0030] like Figure 3 and Figure 4As shown, the crude oil salvage device includes a support frame 3, a rear traction roller 4, a front traction roller 5, a conveyor belt 6, a hydrophobic oil-absorbing sponge 7, a detachable oil-absorbing extrusion roller 8, and a fixed extrusion roller 9. The support frame 3 is a rectangular frame with a rotating shaft 13 passing through its center. Two ends of the rotating shaft 13 are connected to a traction trolley 14. Horizontal grooves 101 are provided on both sides of the hull, and the traction trolley 14 is located within these grooves. Activating the traction trolley 14 causes the rotating shaft 13 and the support frame 3 to slide horizontally along the hull 1. In the non-salvage state, the crude oil salvage device is placed horizontally on the hull 1, in the retracted state. In the oil spill area, operations at the spill site may involve immediate surface oil containment, or, if not, the spilled crude oil may drift with the ocean currents to coastal and inland river basins. During the salvage operation, the salvage vessel retracts the oil spill salvage device and the surface oil containment arm 2, increasing its speed to quickly reach the oil spill site. A rotating servo motor 15 is installed in the middle of the load-bearing frame 3. A drive gear 16 is connected to the output shaft of the rotating servo motor 15. A rotating gear 17 is installed in the middle of the rotating shaft 13. When the rotating servo motor 15 is activated, it drives the drive gear 16 to mesh with the rotating gear 17, causing the load-bearing frame 3 to rotate around the rotating shaft 13. When the salvage vessel travels to the oil spill area for operation, the oil retrieval device is moved to the stern by a tug trolley. After moving to the working position, the rotating servo motor is activated to rotate and lower the oil retrieval device. The rotation angle is 0° to 30°. The operator can adjust the working angle according to the different buoyancy of the salvage vessel and the thickness of the oil spill at the rescue site, so that the hydrophobic oil-absorbing sponge can fully contact the spilled oil after squeezing out the water.

[0031] The traction rear roller 4 is located at the rear end of the support frame 3, and the traction front roller 5 is located at the front end of the support frame 3. The conveyor belt 6 is wound around the traction front roller and the traction rear roller. A traction servo motor 18 is installed at the rear end of the support frame 3. The output shaft of the traction servo motor 18 is connected to the traction rear roller 4 through a belt 19. When the traction servo motor 18 is activated, it drives the traction rear roller 4 to rotate, thereby driving the conveyor belt 6. The hydrophobic oil-absorbing sponge 7 is located on the outer surface of the conveyor belt 6. The detachable oil-absorbing squeezing roller 8 is located at the front end of the support frame and is fixed by fixing bolts 23. The position of the detachable oil-absorbing squeezing roller is adjusted to ensure that it is immersed slightly below the leaking crude oil. The detachable oil-absorbing squeezing roller can fully squeeze the water inside the hydrophobic oil-absorbing sponge. The fixed squeezing roller 9 is located at the rear end of the support frame 3 and is used to squeeze the crude oil inside the hydrophobic oil-absorbing sponge. The present invention drives the rear traction roller 4 to rotate, which drives the conveyor belt 6 through the front traction roller 5. The hydrophobic oil-absorbing sponge absorbs crude oil and transports the crude oil from front to back.

[0032] The oil spill containment arms 2 are a pair of arc-shaped arms made of oleophobic hollow plastic. The support frame 3 has slide rail grooves (301) on both sides. Each slide rail groove 301 is connected to a movable sliding buckle 10 that can move back and forth along the slide rail groove. The oil spill containment arms 2 are fitted onto the movable sliding buckles 10, allowing them to float on the water surface and move along the slide rail grooves 301. After the oil spill containment arms on both sides of the crude oil retrieval device are placed in the water, they automatically adjust their position using buoyancy through the slide rail grooves and movable sliding buckles, ensuring they always float on the water surface and contain the leaking crude oil in front of the operation.

[0033] This invention improves crude oil salvage efficiency, effectively recovers leaked crude oil, and the salvage vessel is simple to operate, highly maneuverable, has low labor costs, and a high crude oil recovery rate. The hydrophobic oil-absorbing sponge can be reused after maintenance.

[0034] The present invention discloses a salvage method for a surface oil spill salvage vessel with adjustable operating depth, comprising the following steps:

[0035] like Figure 1 As shown, the salvage vessel retracted its crude oil salvage equipment and oil slick during its operation at the salvage site.

[0036] like Figure 2 As shown, when the salvage vessel travels to the oil spill area for operation, the floating oil containment arms are first installed on the oil retrieval device of the salvage vessel. The detachable oil-absorbing squeezing rollers are then fixed with fixing bolts. The position of the detachable oil-absorbing squeezing rollers is adjusted to ensure that they are submerged slightly below the leaking oil, fully squeezing the hydrophobic oil-absorbing sponge. The traction trolley located in the horizontal sliding grooves on both sides of the hull drives the oil retrieval device to move towards the stern. When it reaches the working position, it stops. The rotating shaft on the oil retrieval device is driven to rotate and lower the oil retrieval device. The rotation angle is 0° to 30°. The operator can adjust the working angle according to the different floating states of the salvage vessel and the thickness of the leaked oil at the rescue site, so that the hydrophobic oil-absorbing sponge can fully contact the leaking oil after squeezing out the water. After the floating oil containment arms on the left and right sides of the oil retrieval device are put into the water, the floating oil containment arms automatically adjust their position with the help of buoyancy through the sliding rail grooves and movable sliding buckles, so that they always float on the water surface and surround the leaking oil in front of the operation.

[0037] During the salvage operation, the salvage vessel reverses using its propellers, using an oil slick to encircle the floating crude oil and deliver the spilled oil to the working area of ​​the oil retrieval device. Because the oil slick automatically floats on the water surface, it prevents the crude oil from escaping the encirclement. The traction control motor on the oil retrieval device is activated, driving the rear traction roller to rotate. This, in turn, drives the conveyor belt via the front traction roller. The hydrophobic oil-absorbing sponge begins its work as it passes through the conveyor belt. After being compressed by detachable oil-absorbing compression rollers, the conveyor belt rotates in the following direction: From bottom to top and from back to front, the lower conveyor belt first enters the water and absorbs some water. The detachable oleophobic extrusion rollers squeeze the hydrophobic oil-absorbing sponge to squeeze out the excess water. The hydrophobic oil-absorbing sponge then comes into contact with the leaking crude oil, absorbs the leaking crude oil, and is conveyed by the conveyor belt to the fixed extrusion rollers. After being squeezed by the fixed extrusion rollers, 80% of the absorbed crude oil is discharged into the stern of the ship's hull. After the crude oil and water are filtered through the crude oil filter screen, they enter the forward hull of the salvage vessel. The oil suction pipe is always above the crude oil surface with the help of the buoyancy of the floating support.

[0038] After the salvage operation is completed, the salvage vessel retracts its crude oil salvage equipment and sails to the shore or alongside a transport ship. An external oil suction pump is connected to the oil suction pipe to suck up the oil. The floating support automatically adjusts its height based on buoyancy, ensuring that the height of the oil suction port remains consistent with the oil surface. After absorbing the upper layer of crude oil in the ship's hold, the small amount of water previously brought in by the hydrophobic oil-absorbing sponge can be treated and discharged through the drainage pipe and the ship's side water pump, completing the entire process.

Claims

1. An adjustable depth of operation surface oil spill recovery vessel, characterized by: The system includes a hull (1), an oil retrieval device mounted on the hull and capable of sliding and rotating horizontally along the hull, and an oil buoy (2) located at the front end of the oil retrieval device. The oil retrieval device includes a load-bearing frame (3) rotatably connected to the hull, a rear traction roller (4) located at the rear end of the load-bearing frame, a front traction roller (5) located at the front end of the load-bearing frame, a conveyor belt (6) wound around the front and rear traction rollers, a hydrophobic oil-absorbing sponge (7) located on the outer surface of the conveyor belt, and a detachable [unclear - possibly a device] located at the front end of the load-bearing frame for squeezing water from inside the hydrophobic oil-absorbing sponge. The system includes a discharge-type oleophobic extrusion roller (8) and a fixed extrusion roller (9) located at the rear of the support frame and used to extrude crude oil inside the hydrophobic oil-absorbing sponge. The drive traction rear roller (4) rotates, and the traction front roller (5) drives the conveyor belt (6) for transmission. The hydrophobic oil-absorbing sponge absorbs crude oil and transports it from front to back. The front end of the crude oil retrieval device is oriented towards the stern of the ship, and the rear end of the crude oil retrieval device is oriented towards the bow of the ship. The operating depth and operation of the crude oil retrieval device are adjusted according to the different floating states of the retrieval vessel and the thickness of the leaked crude oil at the disaster relief site. From an industry perspective, the detachable oleophobic extrusion roller is located below the leaking crude oil; the oil-floating containment arm (2) is a pair of arc-shaped arms made of oleophobic hollow plastic, and the two sides of the load-bearing frame (3) are provided with slide rail grooves (301), each slide rail groove (301) is connected with a movable sliding buckle (10) that can move back and forth along the slide rail groove, the oil-floating containment arm (2) is sleeved on the movable sliding buckle (10), the oil-floating containment arm (2) floats on the water surface and moves freely along the slide rail groove (301); during the salvage operation, the salvage vessel reverses and uses the oil-floating containment arm to salvage the floating crude oil. The system surrounds the spilled crude oil and delivers it to the work area. The traction rollers rotate, and the traction front rollers drive the conveyor belt. The hydrophobic oil-absorbing sponge starts working via the conveyor belt. The lower conveyor belt first enters the water, and the hydrophobic oil-absorbing sponge absorbs some water. The detachable oil-absorbing extrusion rollers squeeze the hydrophobic oil-absorbing sponge to squeeze out the excess water. The hydrophobic oil-absorbing sponge then comes into contact with the spilled crude oil, absorbs the spilled crude oil, and is conveyed by the conveyor belt to the fixed extrusion rollers. After being squeezed by the fixed extrusion rollers, the absorbed crude oil is discharged into the stern of the ship's hull. A rotating shaft (13) is provided in the middle of the load-bearing frame (3). A traction trolley (14) is connected to both ends of the rotating shaft (13). The traction trolley (14) is located in the horizontal sliding groove (101) on both sides of the hull and drives the rotating shaft (13) and the load-bearing frame (3) to slide horizontally along the hull (1). A rotating rudder (15) is provided in the middle of the load-bearing frame (3). A drive gear (16) is connected to the output shaft of the rotating rudder (15). A rotating gear (17) is provided in the middle of the rotating shaft (13). When the rotating rudder (15) is started, it drives the drive gear (16) to mesh with the rotating gear (17) and drives the load-bearing frame (3) to rotate around the rotating shaft (13).

2. The adjustable depth of touch water leaking crude oil salvage vessel of claim 1, wherein: The hull (1) is provided with an oil filter screen in the middle of the cabin. The oil filter screen includes a steel fixed frame (11) and an oleophobic coated filter screen (12) located in the steel fixed frame.

3. The adjustable depth of touch water leaking crude oil salvage vessel of claim 2, wherein: The bottom surface of the cabin of the hull (1) is inclined downward from the stern to the bow.

4. The adjustable depth of touch water leaking crude oil salvage vessel of claim 1, wherein: The rear end of the load-bearing frame (3) is provided with a traction servo motor (18). The output shaft of the traction servo motor (18) is connected to the traction rear roller (4) via a belt (19). When the traction servo motor (18) is started, it drives the traction rear roller (4) to rotate, thereby driving the conveyor belt (6) to drive.

5. The adjustable depth of touch water leaking crude oil salvage vessel of claim 1, wherein: It also includes an oil suction assembly for siphoning crude oil from the hull, which includes a floating support (20) floating above the crude oil and an oil suction pipe (21) located on the floating support, the oil suction pipe (21) being connected to an external oil suction pump.

6. The adjustable depth of touch water leaking crude oil salvage vessel of claim 1, wherein: The hull (1) is provided with a drainage pipe (22) for an external water pump on its side wall. The inlet of the drainage pipe is located at the bottom of the cabin, and the outlet of the drainage pipe is located above the hull.

7. A salvage method of a salvage ship for leaking crude oil on the water surface with an adjustable depth of work according to any one of claims 1 to 6, characterized in that, Includes the following steps: During the operation at the salvage site, the salvage vessel retracted its crude oil salvage equipment and oil slick. When the salvage vessel arrives at the oil spill area, the floating oil containment arms are first installed on the oil retrieval device. The detachable oil-absorbing squeezing rollers are then fixed with bolts. The position of the detachable oil-absorbing squeezing rollers is adjusted to ensure that they are submerged slightly below the spilled oil, fully squeezing the hydrophobic oil-absorbing sponge. The oil retrieval device is then moved towards the stern by a traction trolley located in the horizontal chute on both sides of the hull. When it reaches the working position, it stops. The rudder is then activated to rotate and lower the oil retrieval device. The rotation angle is 0° to 30°. The operator adjusts the working angle according to the different buoyancy of the salvage vessel and the thickness of the spilled oil at the rescue site, ensuring that the hydrophobic oil-absorbing sponge, after squeezing out water, makes full contact with the spilled oil. After the floating oil containment arms on both sides of the oil retrieval device are placed in the water, they automatically adjust their position with the help of buoyancy through the sliding rail grooves and movable buckles, keeping them always floating on the water surface and surrounding the spilled oil in front of the operation. During the salvage operation, the salvage vessel reverses to surround the floating crude oil with an oil buoy, delivering the leaked crude oil to the working area of ​​the crude oil salvage device. Because the oil buoy can automatically float on the water surface, it can prevent the crude oil from escaping the oil buoy's enclosure. The traction rudder on the crude oil salvage device is activated, driving the traction rear roller to rotate. The traction front roller drives the conveyor belt, and the hydrophobic oil-absorbing sponge starts working via the conveyor belt. The conveyor belt below first enters the water and absorbs some water. The detachable oil-absorbing squeezing roller squeezes the hydrophobic oil-absorbing sponge to squeeze out the excess water. The hydrophobic oil-absorbing sponge then comes into contact with the leaked crude oil, absorbs the leaked crude oil, and is conveyed by the conveyor belt to the fixed squeezing roller. After being squeezed by the fixed squeezing roller, 80% of the absorbed crude oil is discharged into the stern of the hull. After the crude oil and water are filtered through the crude oil filter screen, they enter the forward hull of the salvage vessel. The oil suction pipe is always above the crude oil surface with the help of the buoyancy of the floating support. After the salvage operation is completed, the salvage vessel retracts its crude oil salvage equipment and sails to the shore or alongside a transport ship. An external oil suction pump is connected to the oil suction pipe to suck up the oil. The floating support automatically adjusts its height based on buoyancy, ensuring that the height of the oil suction port remains consistent with the oil surface. After absorbing the upper layer of crude oil in the ship's hold, the small amount of water previously brought in by the hydrophobic oil-absorbing sponge is treated and then discharged through the drainage pipe and the ship's side water pump, completing the entire process.

Images