Methanol dual-fuel shallow draft pipe-laying ship

Abstract

A front propeller cabin, a front auxiliary equipment cabin, an engine room, a methanol fuel preparation room, a methanol storage cabin, a rear auxiliary equipment cabin and a rear propeller cabin are sequentially arranged at the bottom from a prow to a stern, and diesel oil storage cabins are arranged on the two sides of the methanol storage cabin. Water ballast tanks are arranged on the outer side of the diesel oil storage tank and the bottom of the methanol storage tank; a living building is arranged at the bow of the top of the hull, stabilization water cabins are arranged in the middle and at the stern of the hull, a pipe laying operation area is arranged in the middle of the stabilization water cabins, and pipe laying operation equipment cabins are arranged on the two sides of the pipe laying operation area; and a methanol filling station is also arranged on the boat body. According to the ship type, by means of ingenious arrangement and layout and by improving the seakeeping performance of the ship, the pipe laying operation efficiency is improved; a special ship body line type is adopted, so that the storage capacity of subsea pipelines is improved on the premise of ensuring that the ship has shallow draft; and by arranging the methanol storage cabin, the carbon reduction capacity of the ship is improved on the premise that the endurance is not influenced.

Description

Technical Field

[0001] The invention relates to a methanol dual-fuel shallow-draft pipe-laying vessel, belonging to the technical field of ship design and manufacture. Background Art

[0002] Traditional pipe-laying vessels use heavy oil or diesel as fuel, and the large amount of carbon dioxide and sulfur oxide emissions will have a great impact on the environment. Methanol fuel, as a new type of clean energy, can effectively reduce the carbon emissions of ships. More and more new ships are beginning to choose methanol as fuel to reduce carbon dioxide emissions; many operating ships also choose to upgrade their fuels in the hope that methanol can be used instead of traditional fossil fuels in the future.

[0003] However, there are certain problems with using methanol fuel for shallow water pipe laying: (1) Shallow water pipe laying vessels need to store a sufficient number of sea pipes on board, while ensuring that the draft of the ship is not too large. Compared with fossil fuels such as diesel, methanol has a lower calorific value and lower energy density. Therefore, in order to achieve the same endurance and operating capacity, it is necessary to load and store methanol fuel, which is heavier and occupies a larger volume. This is a challenge for ship design. (2) The increase in methanol fuel loading means a decrease in the amount of sea pipes stored on board. (3) In order to improve the efficiency of pipe laying operations, shallow water pipe laying vessels have higher requirements for wave resistance. On the premise of meeting stability, it is necessary to raise the center of gravity of the ship as much as possible, thereby increasing the ship's natural rolling period. A large amount of fuel is stored in the cabin, which will cause the center of gravity of the ship to move downward, thereby reducing the ship's wave resistance, which has a great impact on the efficiency of pipe laying operations.

[0004] At present, there is no pipe-laying vessel suitable for methanol dual-fuel. In order to meet the needs of the transition of ship fuel to methanol clean fuel, it is necessary to develop a dual-fuel pipe-laying vessel with good operating efficiency that can use both methanol and diesel. Summary of the invention

[0005] The problem to be solved by the present invention is to provide a ship type design of a methanol dual-fuel shallow draft pipe-laying vessel, and at the same time, solve the problems of limited endurance, reduced wave resistance of the whole ship, reduced storage capacity of sea pipes, etc. caused by the use of methanol on this type of ship.

[0006] In order to solve the above problems, the present invention provides a methanol dual-fuel shallow draft pipe-laying ship, the bottom of which is provided with a front thruster cabin, a front auxiliary equipment cabin, an engine room, a methanol fuel preparation room, a methanol storage cabin, a rear auxiliary equipment cabin, and a rear thruster cabin in sequence from the bow to the stern, diesel storage cabins are provided on both sides of the methanol storage cabin, and ballast water tanks are provided on the outside of the diesel storage cabin and at the bottom of the methanol storage cabin; a living building is provided at the bow on the top of the hull, anti-rolling water tanks are provided in the middle and stern of the ship, a pipe-laying operation area is provided in the middle of the anti-rolling water tank, and pipe-laying operation equipment cabins are provided on both sides of the pipe-laying operation area; and a methanol filling station is also provided on the hull. In the present invention, a flat anti-rolling water tank spanning the width of the ship is provided above the methanol storage cabin at the ship section where the methanol storage cabin is located, and a ballast water tank is provided below; the anti-rolling water tank and the ballast water tank can simultaneously serve as an isolation cabin to prevent leakage of the methanol storage cabin. The arrangement of anti-rolling tanks can also effectively reduce the ship's roll angle and enhance the ship's wave resistance. The anti-rolling tanks arranged above the methanol storage tanks can also increase the ship's center of gravity, further improving the wave resistance while ensuring stability. A fuel filling station is set above the engine room and a methanol filling station is set above the rear auxiliary equipment compartment, which can minimize the length of the methanol pipeline while meeting the specifications. In the front and rear thruster compartments, thrusters with sufficient quantity and power can be configured as needed to ensure that the ship has sufficient speed and dynamic positioning capabilities.

[0007] Preferably, the bottom of the bow is an upright bow. The upright bow can reduce the area of ​​the ship's waterline, lower the transverse metacentric height, increase the waterline length, and further increase the seakeeping performance, while ensuring that the deck surface has enough area to arrange the sea pipe storage area and the ship can provide enough buoyancy to ensure shallow draft.

[0008] Preferably, the hull is a reduced hull.

[0009] Preferably, an isolation cabin is provided around the methanol storage tank.

[0010] More preferably, a passage is provided between the isolation cabin and the diesel storage tanks on both sides to facilitate the passage of personnel and the arrangement of pipes and cables.

[0011] Preferably, a storage room is provided on the diesel storage tank. This position is located below the anti-rolling water tank. Since the floor height is not enough to arrange higher equipment, the space is reasonably planned and utilized, so a storage room is provided.

[0012] Preferably, the volume ratio of the methanol storage tank to the diesel storage tank is 2:1 to ensure that methanol and diesel have the same endurance.

[0013] Preferably, the methanol storage tank and the diesel storage tank are arranged at the same longitudinal position of the hull, so that when methanol or diesel is loaded alone, it will not have an excessive impact on the overall longitudinal strength of the ship.

[0014] Preferably, a top sea pipe storage area is provided on the pipe-laying operation area.

[0015] Preferably, side sea pipe storage areas are provided on both sides of the top of the anti-rolling water tank. A pipe-laying operation area is arranged longitudinally on the deck surface. Pipe-laying operation equipment cabins are arranged on both sides of the pipe-laying operation area for arranging welding and testing equipment. At the same time, the pipe-laying operation equipment cabins on both sides can also enhance the bearing capacity of the top of the pipe-laying operation area. Sea pipe storage areas are arranged on the outside and top of the pipe-laying operation area to store enough sea pipes. The sea pipe storage area arranged on the top of the pipe-laying operation area can further improve the center of gravity of the ship and further improve the wave resistance while ensuring stability.

[0016] The ship type of the present invention, through clever setting and layout, improves the wave resistance of the ship and enhances the efficiency of pipe-laying operations; by adopting a special hull line, the storage capacity of sea pipes is increased while ensuring that the ship has a shallow draft; by providing a methanol storage tank, the carbon reduction capacity of the ship is improved without affecting the endurance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of the methanol dual-fuel shallow draft pipe-laying vessel provided by the present invention;

[0018] Figure 2 for Figure 1 Left view of . DETAILED DESCRIPTION

[0019] In order to make the present invention more clearly understood, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0020] Example

[0021] like Figure 1 , 2As shown, a methanol dual-fuel shallow draft pipe-laying ship provided by the present invention has a front thruster cabin 3, a front auxiliary equipment cabin 4, a cabin 5, a methanol fuel preparation room 6, a methanol storage cabin 7, a rear auxiliary equipment cabin 8, and a rear thruster cabin 9 arranged in sequence at the bottom from the bow to the stern, and diesel storage cabins 18 are arranged on both sides of the methanol storage cabin 7, and ballast water tanks 17 are arranged on the outside of the diesel storage cabin 18 and at the bottom of the methanol storage cabin 7; a living building 1 is arranged at the bow on the top of the hull, and anti-rolling water tanks 11 are arranged in the middle of the ship and the stern, and a pipe-laying operation area 15 is arranged in the middle of the anti-rolling water tank 11, and pipe-laying operation equipment cabins 22 are arranged on both sides of the pipe-laying operation area 15; and 10 and a methanol filling station 12 are also arranged on the hull. In the present invention, a flat anti-rolling water tank spanning the ship width is arranged above the methanol storage cabin at the ship section where the methanol storage cabin is located, and a ballast water tank is arranged below; the anti-rolling water tank and the ballast water tank can be used as isolation cabins for preventing leakage of the methanol storage cabin at the same time. The arrangement of anti-rolling tanks can also effectively reduce the ship's roll angle and enhance the ship's wave resistance. The anti-rolling tanks arranged above the methanol storage tanks can also increase the ship's center of gravity, further improving the wave resistance while ensuring stability. A fuel filling station is set above the engine room and a methanol filling station is set above the rear auxiliary equipment compartment, which can minimize the length of the methanol pipeline while meeting the specifications. In the front and rear thruster compartments, thrusters with sufficient quantity and power can be configured as needed to ensure that the ship has sufficient speed and dynamic positioning capabilities.

[0022] The bottom of the bow is an upright bow. The upright bow can reduce the area of ​​the ship's waterline, reduce the transverse metacentric height, increase the waterline length, and further increase the seakeeping performance, while ensuring that the deck surface has enough area to arrange the sea pipe storage area and the ship can provide enough buoyancy to ensure shallow draft.

[0023] The hull is a reduced hull 16 .

[0024] An isolation cabin 20 is provided on the periphery of the methanol storage cabin 7. A passage 19 is provided between the isolation cabin 20 and the diesel storage cabins 18 on both sides to facilitate the passage of personnel and the arrangement of pipes and cables.

[0025] The diesel storage tank 18 is provided with a storage room 21. This position is located below the anti-rolling water tank. Since the floor height is not enough to arrange higher equipment, the space is rationally planned and utilized, so a storage room is set.

[0026] The volume ratio of the methanol storage tank 7 to the diesel storage tank 18 is 2:1, so as to ensure that methanol and diesel have the same endurance.

[0027] The methanol storage tank 7 and the diesel storage tank 18 are arranged at the same longitudinal position of the ship, so that when methanol or diesel is loaded alone, it will not have a significant impact on the overall longitudinal strength of the ship.

[0028] A top sea pipe storage area 13 is provided on the pipe-laying operation area 15 .

[0029] Side pipe storage areas 14 are provided on both sides of the top of the anti-rolling water tank 11. A pipe-laying operation area is arranged longitudinally on the deck surface. Pipe-laying operation equipment cabins are arranged on both sides of the pipe-laying operation area for arranging welding and testing equipment. At the same time, the pipe-laying operation equipment cabins on both sides can also enhance the bearing capacity of the top of the pipe-laying operation area. Pipe storage areas are arranged outside and on the top of the pipe-laying operation area to store enough pipes. The pipe storage area arranged on the top of the pipe-laying operation area can further improve the center of gravity of the ship and further improve the wave resistance while ensuring stability.

Claims

1. A methanol dual-fuel shallow draft pipe-laying vessel, characterized in that: The bottom of the ship is provided with a front thruster cabin (3), a front auxiliary equipment cabin (4), an engine room (5), a methanol fuel preparation room (6), a methanol storage cabin (7), a rear auxiliary equipment cabin (8), and a rear thruster cabin (9) in sequence; diesel storage cabins (18) are provided on both sides of the methanol storage cabin (7); ballast water tanks (17) are provided on the outer side of the diesel storage cabin (18) and at the bottom of the methanol storage cabin (7); a living building (1) is provided at the bow of the top of the ship; anti-rolling tanks (11) are provided in the middle and at the stern of the ship; a pipe-laying operation area (15) is provided in the middle of the anti-rolling tank (11); and pipe-laying operation equipment cabins (22) are provided on both sides of the pipe-laying operation area (15); and (10) and a methanol filling station (12) are also provided on the ship.

2. The methanol dual-fuel shallow draft pipe-laying vessel according to claim 1, characterized in that: The bottom of the bow is a vertical bow.

3. The methanol dual-fuel shallow draft pipe-laying vessel according to claim 1, characterized in that: The hull is a reduced hull (16).

4. The methanol dual-fuel shallow draft pipe-laying vessel according to claim 1, characterized in that: An isolation cabin (20) is provided on the periphery of the methanol storage cabin (7).

5. The methanol dual-fuel shallow draft pipe-laying vessel according to claim 4, characterized in that: A passage (19) is provided between the isolation cabin (20) and the diesel storage cabins (18) on both sides.

6. The methanol dual-fuel shallow draft pipe-laying vessel according to claim 1, characterized in that: The diesel storage tank (18) is provided with a storage room (21).

7. The methanol dual-fuel shallow draft pipe-laying vessel according to claim 1, characterized in that: The volume ratio of the methanol storage tank (7) to the diesel storage tank (18) is 2:

1.

8. The methanol dual-fuel shallow draft pipe-laying vessel according to claim 1, characterized in that: The methanol storage tank (7) and the diesel storage tank (18) are arranged at the same longitudinal position of the hull.

9. The methanol dual-fuel shallow draft pipe-laying vessel according to claim 1, characterized in that: A top sea pipe storage area (13) is provided on the pipe-laying operation area (15).

10. The methanol dual-fuel shallow draft pipe-laying vessel according to claim 1, characterized in that: Side sea pipe storage areas (14) are respectively provided on both sides of the top of the anti-rolling water tank (11).

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