Multifunctional methanol transporting and filling ship

Abstract

The invention discloses a multifunctional methanol transportation filling ship, and belongs to the technical field of shipbuilding. The filling ship has the methanol transportation function and the methanol filling function, and methanol and / or fuel oil are / is filled during filling; when methanol is injected, tug assistance is not needed, the power positioning capacity is used, and the capacity of self-reliance berthing and unberthing towards an injected ship is achieved. The in-ship loading and unloading-filling platform and the bow filling platform meet the requirement for height difference of different filling connectors, and filling can be conducted on filled ships with different height differences by adjusting the height of the filling platforms; by the adoption of the telescopic saddle, hoisting is avoided, and the labor intensity of operators is relieved; the ship further comprises a device for rapidly collecting and releasing the leaning ball, the leaning ball can be suspended at any position from side top plates of the two ships to the waterline, the transverse safe buffering distance of the two ships is kept, the leaning ball collecting and releasing device has a wave compensation function, and the stress of the collecting and releasing device is optimally reduced. By means of the multi-point suspension device, when the two ships are berthed, the arrangement number of the buffering leaning balls meets the operation requirement, and the operation ship type range is expanded.

Description

Technical Field

[0001] The invention relates to a multifunctional methanol transport and filling ship, which belongs to the technical field of shipbuilding. Background Art

[0002] Over the past decade, LNG, as a clean energy source, has been widely embraced by major shipowners both domestically and internationally. Its use as a carbon-reducing fuel for ships has seen rapid growth, with an increasing number of large LNG carriers, LNG bunkering vessels, and LNG-fueled ships. With the increasingly stringent IMO energy conservation and emissions reduction regulations, the EU has begun imposing a carbon tax, and national maritime authorities have also begun pilot programs. To avoid paying high carbon taxes or having ships suspended due to failing to meet carbon intensity targets, shipping giants are turning to alternative fuels. New alternative fuels, including methanol, ammonia, and hydrogen, are currently hot topics, with green methanol fuel being the most popular. In recent years, international shipping giants have begun building methanol-fueled vessels and signing cooperation agreements with green methanol producers and ports. As methanol-fueled vessels are completed and put into operation, the transportation and bunkering of large quantities of methanol fuel will inevitably become a rigid demand.

[0003] There are methanol tankers and converted methanol bunkering vessels on the market. There are certain limitations or restrictions during ship-to-ship bunkering operations, as follows:

[0004] 1. Methanol-fueled ships need to blend about 5% of fuel oil while burning methanol fuel. After the methanol-fueled ship is refueled, it needs to be refueled with fuel oil twice.

[0005] 2. At present, domestic bunkering ships and receiving ships use floating balls to buffer the gap between the two ships. However, in actual operations, if the receiving ship is a V-shaped ship, the balls may be squeezed into the bottom of the ship when floating on the waterline, and cannot play a good role in isolation and buffering. As a result, bunkering operations cannot be carried out on such receiving ships, resulting in a certain loss of market space.

[0006] 3. Currently, the bunkering vessels in use mainly use the bow for bunkering. When there is a large height difference between the bunkering vessel and the receiving vessel, the hose length sometimes limits the operation.

[0007] 4. At present, in domestic water refueling operations, the refueling ships are pushed and guarded by tugboats, gradually approaching the receiving ship, which requires a lot of manpower and material resources as well as coordination work, and cannot achieve the refueling ship's autonomous berthing and unberthing.

[0008] 5. Currently, the saddles on domestic bunkering vessels are all fixed. During bunkering operations, the U-shaped bend is outside the ship. When not in operation, the saddle must be hoisted to a safe place inside the ship and fixed using a crane. The saddle is difficult to retract and requires repeated hoisting, which increases labor intensity and operational risks. Summary of the Invention

[0009] In order to solve the problems existing in the prior art, the present invention provides a multifunctional methanol transport and bunkering ship, which solves the problem that the methanol transport ship has both methanol bunkering functions and can bunker methanol and fuel oil at the same time. It has the ability to independently berth and unberth to the receiving ship during methanol bunkering, so that the berthing ball can reasonably buffer the bunkering ship and the receiving ship; and an adjustable high and low position bunkering station is configured on the bunkering ship to meet the problems such as the height difference of the bunkering interface of different ship types. The use of a retractable device suspended by a berthing ball can enable any two ships to meet the berthing requirements and increase the operating range of the bunkering ship. A series of berthing ball suspension eye plates along the side can meet the requirements of various types of receiving ships in terms of strength and position, thereby increasing the operating range.

[0010] In order to solve the above technical problems, the technical solution adopted by the present invention is: a multifunctional methanol transport and bunkering ship, in the cabin below the upper deck, from bow to stern, there are: a bow area, a cargo hold area, a front engine room area and an engine room, the bow area includes a forepeak tank, a bow ballast tank, and an emergency fire pump room, the cargo hold area is a double hull and double bottom, the side double hull space and the bottom double bottom area are 6 pairs of ballast tanks, the cargo hold area includes 1 pair of fuel and methanol liquid cargo tanks, 4 pairs of liquid cargo tanks, 1 pair of sewage tanks and 1 pair of methanol fuel storage tanks; the front engine room area is provided with a methanol daily tank and a methanol fuel preparation room; the main engine and auxiliary engine are arranged in the engine room.

[0011] The midship loading and unloading-filling platform and the bow filling platform, as well as hydraulic hose cranes cooperating with the two, are set in the middle and bow of the upper deck; the midship loading and unloading-filling platform is set above the liquid cargo tank, and the bow filling platform is set above the fuel and methanol liquid cargo tank; the midship loading and unloading-filling platform is set on the midship deck, and the midship low-level loading and unloading-filling station and the midship high-level loading and unloading-filling station are respectively set through the midship loading and unloading-filling platform lifting device; the bow filling platform is set on the bow deck, and the bow low-level filling station and the bow high-level filling station are respectively set through the bow filling station platform lifting device.

[0012] The loading and unloading-filling platform and the bow filling platform also include a retractable saddle, which includes a base fixed to the deck and a sliding hose bracket, and a U-shaped bend bracket for supporting the filling hose is provided at the front end of the sliding hose bracket;

[0013] A roller is provided between the sliding hose bracket and the base, and the sliding hose bracket slides relative to the base. When in operation, the sliding hose bracket slides outward from the ship's side, so that the U-shaped bend bracket is completely moved outward from the ship's side, and the sliding hose bracket is fixed to the base by a limit pin; when not in operation, the sliding hose bracket slides inward from the ship's side, so that the U-shaped bend bracket is completely moved inward from the ship's side, and the sliding hose bracket is fixed to the base by a limit pin;

[0014] The bunkering vessel is also provided with a ball-supported retractable and retractable device, in which a retractable and retractable cable is arranged on a retractable and retractable hanger, and a ball is arranged at the bottom of the retractable and retractable cable; the ball-supported retractable and retractable device also includes an automatic control system for controlling the retracting, releasing and wave compensation of the retractable and retractable cable, and the automatic control system is provided with an upper threshold and a lower threshold of the tension of the retractable and retractable cable during wave compensation; when the automatic control system detects that the tension of the retractable and retractable cable exceeds the upper threshold, the automatic control system controls the retractable and retractable cable to be loosened so that the tension of the retractable and retractable cable is between the upper threshold and the lower threshold; when the automatic control system detects that the tension of the retractable and retractable cable is lower than the lower threshold, the automatic control system controls the retractable and retractable cable to be tightened so that the tension of the retractable and retractable cable is between the upper threshold and the lower threshold; the ball is controlled at any height between the water surface of the side and the side top column plate.

[0015] Furthermore, the loading and unloading-filling platform and the bow filling platform also include an emergency release device, a quick connector, a saddle and an anti-fall system, a ship ranging system and an electrical control system.

[0016] Furthermore, the low-level loading and unloading-filling station and the mid-ship high-level loading and unloading-filling station include liquid cargo filling pipes, steam recovery pipes, tank stripping pipes, fuel filling pipes, and auxiliary nitrogen and fresh water pipelines.

[0017] The bow low-level filling station and the bow high-level filling station include liquid cargo filling pipes, steam recovery pipes, fuel filling pipes, and auxiliary nitrogen and fresh water pipelines.

[0018] Furthermore, the bunkering vessel is also provided with a multi-point suspension device, in which a ball is tied to an eye plate or eye ring or eye ring on the deck through an anchor chain. A single eye ring or eye plate can withstand a force of more than 20 tons.

[0019] Furthermore, the bunkering ship also includes a methanol fuel supply system, in which a methanol transfer pump extracts methanol from the methanol fuel storage tank and sends it to the methanol daily tank. The methanol fuel in the methanol daily tank is transported to the main engine and auxiliary engine in the engine room through the methanol supply unit and the control valve unit.

[0020] The beneficial effects of the present invention are:

[0021] The present invention proposes a multifunctional methanol transport and bunkering vessel, which can not only meet the needs of transporting bulk methanol on water, but also provide water bunkering (including methanol and combustion-supporting fuel) for various types of methanol-powered ships. It can enable berthing between two ships of any type, and both can be compatible with transmission pipelines, thereby meeting the bunkering requirements of different receiving ship types and the loading and unloading requirements of different terminals, and promoting the healthy development of methanol as an alternative fuel.

[0022] (1) Vessels with both methanol transportation and bunkering functions

[0023] This ship is designed based on the existing domestic hazardous chemical terminal berths and future methanol fuel refueling market forecasts, combined with the existing order types of methanol-fueled powered ships and special ship types such as PCTC that may be refueled in the future. It also has the functions of methanol transportation and refueling operations and has strong adaptability.

[0024] (2) Methanol filling function also has fuel filling function

[0025] The fuel tank at the bow of this ship can provide the receiving ship with the function of fueling fuel, avoiding the receiving ship from having to refuel for the second time, saving the time and cost of refueling.

[0026] (3) Self-supporting berthing and unberthing function without tugboat assistance

[0027] The vessel is equipped with one thruster at the bow and one rudder propeller at the stern. By configuring a DP system on board, DP2 redundancy can be achieved, enabling self-supported berthing and unberthing without the assistance of a tugboat, thus reducing dependence on tugboats.

[0028] (4) Height-adjustable loading and unloading and filling station

[0029] The middle loading and unloading and filling station of the methanol transport bunkering ship and the filling station at the bow are equipped with height-adjustable functions. The hydraulic lifting device can be used to adjust the height of the filling platform to adapt to different receiving ship types or docks, and to meet the height compatibility matching of the transmission pipeline when two ships berth or berth at the dock.

[0030] (5) The ball retracting and deploying device can make the ball hover at any position from the top plate of the side of the two ships to the waterline, ensuring the safe buffering of the two ships. At the same time, the retracting and deploying device has a wave compensation function, which can keep the ball relatively stable when the two ships move relative to each other, avoid rolling, reduce the force, improve the safety of operation, and enable the methanol transport bunkering ship to carry out bunkering operations with various receiving ships.

[0031] (6) The retractable saddle consists of an upper sliding hose bracket and a lower base, wherein the base is fixed to the deck by four bolts. During operation, the upper sliding hose bracket and the lower base slide together via rollers. When the U-shaped bend bracket is completely moved outboard, it is fixed with a limit pin. When the bunkering operation is not in progress, the upper sliding hose bracket is completely moved inboard via rollers. This can prevent the U-shaped bend bracket from being exposed outboard during navigation, affecting navigation safety, and eliminate the need to use a crane to move the saddle inboard as a whole, thereby reducing the labor intensity of the bunkering ship operators.

[0032] (7) Multi-point arrangement and hanging device of the berthing ball. When the berthing ball retraction and deployment device fails, the eye plate for hanging the berthing ball is arranged on the deck so that the berthing ball can have 4-8 hanging positions on each side. The hanging strength is at least more than 20t for a single eye plate to meet the squeezing friction force of the berthing ball when the two ships approach each other. When the two ships berth together, there is always a berthing ball arrangement that can meet the required number of arrangements, ensuring that the methanol transport bunkering ship can carry out bunkering operations with various types of receiving ships.

[0033] The bunkering vessel has both methanol transportation and methanol bunkering functions; methanol and fuel are bunkered at the same time; no tugboat assistance is required during methanol bunkering, and it relies on dynamic positioning capability to have the ability to berth and undock to the receiving ship by itself; it meets the needs of different filling interface height differences, and can bunker to receiving ships of different height differences by adjusting the height of the bunkering platform, thereby expanding the operating capacity; a device for quickly retracting and deploying berthing balls is designed, which can enable the berthing balls to hover at any position from the top plate of the two ships' side to the waterline, maintaining a safe lateral buffer distance between the two ships, and the berthing ball retraction and deployment device has a wave compensation function, which optimally reduces the force on the retraction and deployment device; a set of berthing ball hanging eye plates and their arrangement method are proposed, which can ensure that the number of buffer berthing balls arranged when the two ships are berthed meets the operational requirements, thereby expanding the range of operational ship types. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0035] Figure 1 A side view of a double-deck bunkering station for methanol bunkering ships.

[0036] Figure 2 This is a top view of the upper deck of a double-deck filling station for methanol bunkering ships.

[0037] Figure 3 This is a top view of the cabin of a double-deck filling station for methanol bunkering ships.

[0038] Figure 4 It is a side view of the midship loading, unloading and bunkering platform.

[0039] Figure 5 This is a top view of the midship loading, unloading and bunkering platform.

[0040] Figure 6 This is a side view of the bow filling platform.

[0041] Figure 7 This is a top view of the bow filling platform.

[0042] Figure 8 This is a working diagram of liquid cargo loading, unloading / filling.

[0043] Figure 9 It is a schematic diagram of the movable saddle during operation.

[0044] Figure 10 This is a schematic diagram of the movable saddle when not in operation.

[0045] Figure 11 It is a schematic diagram of the ball retracting and releasing device.

[0046] Figure 12 It is a structural diagram of a multi-point suspension device.

[0047] Figure 13 It is a structural diagram of a multi-point suspension device.

[0048] Figure 14 It is a schematic diagram of static calculation of ball suspension tension.

[0049] In the figure: 1. Forepeak tank, 2. Fore ballast tank, 3. Emergency fire pump room, 4. Fuel oil and methanol cargo tank, 5. Cargo tank, 6. Ballast tank, 7. Methanol fuel storage tank, 8. Methanol daily tank, 9. Methanol fuel preparation room, 10. Sewage tank, 11. Shaft generator, 12. Hydraulic hose crane, 13. Midship loading and unloading-filling platform, 1301. Midship deck, 1302. Midship loading and unloading-filling platform lifting device, 1303. Midship low-level loading and unloading-filling station, 1304. Midship high-level loading and unloading-filling station, 14. Bow filling platform, 1401. Bow deck, 1402. Bow filling platform lifting device, 1403. Bow low-level filling station, 1404. Bow high-level filling station, 15. Inverted arm main fender, 16. Ball-supported retractable and retractable device, 1601. Retractable and retractable hanger, 1602. Retractable and retractable cable, 1603. Ball-supported, 1604. Automatic control system, 17. Multi-point suspension device, 1701. Eye plate, 1702. Anchor chain, 1703. Eye ring, 18. Retractable saddle, 1801. Base, 1802. Sliding hose bracket, 1803. U-bend bracket, 1804. Filling hose, 1805. Limit pin. DETAILED DESCRIPTION

[0050] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0052] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0053] For ease of description, spatially relative terms such as "above," "above," "on the upper surface of," and "above" may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "on top of" another device or structure would then be positioned as "below" or "below" the other device or structure. Thus, the exemplary term "above" may include both the orientations of "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used herein should be interpreted accordingly.

[0054] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0055] Figures 1 to 3 The overall plan of the ship is shown: This ship is a methanol-based ship that can carry 12,000m 3This liquid cargo Class II chemical / product tanker (including a pair of fuel / methanol tanks at the bow, capable of carrying 2,000 m³ of fuel or methanol, and four pairs of methanol cargo tanks, each with a capacity of 2,500 m³, totaling 10,000 m³ of methanol, capable of carrying 2,000 m³ of fuel and 10,000 m³ of methanol, or 12,000 m³ of methanol) is suitable for methanol transport and bunkering in unlimited navigation areas, primarily operating along the Chinese coast and Southeast Asia. It features suitable cargo transportation and ship-to-ship and ship-to-shore bunkering and loading and unloading capabilities. It can perform green methanol bunkering operations for methanol-fueled vessels at anchorage or in ports, meeting the requirements of the latest international and domestic conventions, regulations, and circulars.

[0056] The propulsion system of this vessel adopts a medium-speed 4-stroke methanol dual-fuel main engine driving an adjustable pitch propeller through a reduction gearbox and shafting; and is equipped with a shaft-driven generator 11.

[0057] The vessel is equipped with one thruster at the bow and one rudder propeller at the stern. By configuring a DP system on board, DP2 redundancy can be achieved, enabling self-supported berthing and unberthing without the assistance of a tugboat.

[0058] This vessel is designed as a specially coated Class II chemical tanker, with a specially painted interior cargo hold. It is suitable for the bulk carriage of Class II and Class III chemicals with a flash point less than 60°C, as well as refined oil products. All cargoes must meet the characteristics of the vessel's outfitting, systems, and coating materials; comply with the requirements of the class notation and technical specifications, and be harmless to the entire cargo system.

[0059] The cargo hold loading process is completed by transmission from shore loading equipment, and the unloading and filling processes are completed by two cargo pumps.

[0060] The ship has a vertical stealth bulbous bow and square stern.

[0061] The ship is equipped with 6 pairs of liquid cargo tanks (including one pair of sewage tanks) and a pair of methanol fuel tanks. The cargo hold area has a double hull and double bottom structure.

[0062] This vessel aims to reduce pollution or damage to the marine, land, and atmospheric environments, improve its energy efficiency, and achieve green ship goals. By combining design measures with effective operational controls, the vessel reduces energy consumption while maintaining equivalent operational benefits.

[0063] The vessel has a single continuous deck, with the entire accommodation including the wheelhouse and the engine room located at the stern.

[0064] Below the upper deck, there are 10 transverse bulkheads that divide the main hull into 11 compartments. From bow to stern, there are:

[0065] 1) Forepeak tank 1, fore ballast tank 2, emergency fire pump room 3, etc.

[0066] 2) The cargo hold area is double hull and double bottom. The side double hull space and the bottom double bottom area are 6 pairs of ballast tanks 6. The liquid cargo tank is located amidships and is divided into 5 pairs of cargo tanks (a pair of fuel oil tanks and methanol liquid cargo tanks 4 and 4 pairs of methanol liquid cargo tanks 4), a pair of slop tanks 10 and a pair of methanol fuel storage tanks 7 by 5 watertight transverse bulkheads and 1 midship longitudinal bulkhead.

[0067] 3) A methanol fuel preparation room 9, a methanol daily use cabin 8, a methanol dye storage cabin 7, etc. are set up in front of the engine room.

[0068] 4) The engine room is located at the rear of the cargo hold. Various necessary oil tanks are installed in the engine room. Liquid tanks or void spaces are installed under the double bottom below the engine room.

[0069] 5) A midship loading and unloading platform 13 and a bow filling platform 14 are located in the middle of the upper deck and the bow, respectively. The middle filling station includes cargo and fuel filling pipes, while the bow filling station is only for external filling of methanol fuel. Referring to the OCIMF standard, the filling station is equipped with a liquid storage tank and mooring equipment. (Mid-level high and low)

[0070] 6) The hull structure design should meet the requirements of CCS Class B ice zone reinforcement and be able to operate in floating ice areas such as Bohai Bay in winter.

[0071] 7) Two hydraulic hoses 12 with a rated load of 5t×25m are to be provided near the middle and forward header / filling stations on the upper deck.

[0072] 8) Hydraulic hose hoist 12 should meet explosion-proof requirements and be used for lifting liquid cargo hoses.

[0073] 9) The vessel is equipped with three pairs of inverted arm main fenders 15, measuring 5m x 2.5m, located on the upper deck at both ends and in the middle of the parallel mid-hull. They are used for ship-to-ship siding transfers. The fenders are recovered by a release / recovery system that shares a common hydraulic pump station.

[0074] 10) This vessel is equipped with a floating auxiliary fender on the port and starboard sides of A deck and on the upper deck, with a specification of 3m*1.5m, to protect the bow and stern hull from collision and contact.

[0075] 11) This ship is equipped with a shaft-driven generator 11. The shaft-driven generator (PTO) can supply power to the entire ship during normal navigation of the main engine-driven ship, which can optimize the energy consumption of the entire ship and reduce the configuration of generators.

[0076] The ship's bunkering equipment mainly includes:

[0077] Methanol Fuel Supply System: A methanol transfer pump draws methanol from methanol fuel storage tank 7 (located between the cargo pump room and liquid cargo tanks) and delivers it to methanol day tank 8 (located on top of the cargo pump room). Methanol from methanol day tank 8 is also discharged to shore via the methanol transfer pump and liquid cargo loading and unloading manifold. The methanol fuel in methanol day tank 8 is delivered to the main and auxiliary engines in the engine room via the methanol supply unit (LFSS) and control valve unit (FVT).

[0078] Figures 4 to 8 The liquid cargo loading, unloading and filling system is shown: the ship has 5 pairs of liquid cargo tanks 5, 1 pair of slop tanks 10, 1 pair of methanol fuel storage tanks 7, and 1 methanol daily tank 8. The maximum design loading and unloading rate is ~1200m 3 / h. Valve components and accessories for the liquid cargo system are made of 316L stainless steel. Valves used in the cargo tanks and slop tanks can be remotely operated from the cargo control room. A midship loading and unloading platform 13 and a bow filling platform 14, along with hydraulic hose cranes 12, are located in the middle and bow sections of the upper deck. The midship loading and unloading platform 13 is located above the liquid cargo tank 5, while the bow filling platform 14 is located above the fuel and methanol cargo tank 4. The midship loading and unloading platform 13 is located on the midship deck 1301, and is connected to a midship low-level loading and unloading station 1303 and a midship high-level loading and unloading station 1304 via a midship loading and unloading platform lifting device 1302. The bow filling platform 14 is located on the bow deck 1301, and is connected to a bow low-level filling station 1403 and a bow high-level filling station 1404 via a bow filling station platform lifting device 1402.

[0079] Figure 9 and Figure 10 A retractable saddle 18 is shown, which includes a base 1801 fixed to the deck and a sliding hose bracket 1802 . A U-shaped bend bracket 1803 for supporting a filling hose 1804 is provided at the front end of the sliding hose bracket 1802 .

[0080] A roller is provided between the sliding hose bracket 1802 and the base 1801, and the sliding hose bracket 1802 slides relative to the base 1801. Figure 9 As shown in FIG. 1 , the sliding hose bracket 1802 slides outward from the ship's side, so that the U-shaped bend bracket 1803 is completely moved outward from the ship's side. The sliding hose bracket 1802 is fixed to the base 1801 by the limit pin 1805. Figure 10 As shown in FIG, the sliding hose bracket 1802 slides inwardly toward the ship's side, so that the U-shaped bend bracket 1803 is completely moved inwardly toward the ship's side. The sliding hose bracket 1802 is fixed to the base 1801 by the limit pin 1805.

[0081] Two liquid cargo loading and unloading platforms, also serving as bunkering platforms, are located on the port and starboard sides of the vessel amidships. The platforms are adjustable from highest to lowest, allowing for pipeline height adjustments based on the height of the receiving vessel or dock. Methanol loading / unloading / filling lines are located on the upper portion of the platforms. Due to their dock loading and unloading functions, the pipe diameters are slightly larger, typically 10" to 16", including liquid cargo filling lines, vapor recovery lines, tank stripping lines, fuel oil filling lines, and auxiliary nitrogen and fresh water lines, enabling simultaneous loading and unloading of methanol and fuel oil. A dedicated bunkering station is located on the port and starboard sides of the bow. The liquid cargo loading and unloading manifolds, deck height, and reducing joints are in accordance with OCIMF regulations. Due to the dedicated nature of the bow bunkering station, this manifold is not used for large-scale methanol loading and unloading, so tank stripping lines are not installed. The filling lines are appropriately reduced to 6" or 8", with two liquid and one gas filling lines arranged in a LVL configuration, with an additional fuel oil filling line.

[0082] The vessel is equipped with a hose-based ship-to-ship bunkering system, utilizing liquid cargo pumps to inject methanol. Each bunkering manifold has a maximum filling rate of 600 m³ / h, for a total shipwide maximum of 1,200 m³ / h. The system includes liquid-phase hoses (for both liquid methanol and fuel fuel injection), vapor-phase hoses (for vapor methanol return), an emergency disconnect device (ERC) for short-term disconnection during bunkering, a quick-connect coupler (QCDC) for quickly connecting the hose to the bunkering manifold, an anti-fall system (protecting the hose and the ship), a hydraulic power unit (HPU) for hydraulic power, a vessel distance measurement system (VSD) for monitoring the distance between the two ships, an electrical control system, and other related components and accessories, all of which are state-of-the-art.

[0083] Figure 11 The diagram shows a ball-supported retractable and retractable device 16. A retractable and retractable cable 1602 is mounted on a retractable and retractable hanger 1601 within the device 16. A ball 1603 is positioned at the bottom of the retractable and retractable cable 1602. The ball 1603 can be controlled at any height between the water surface at the side and the sheer strake. The device 16 also includes an automatic control system 1604 for controlling the retracting, releasing, and wave compensation of the retractable and retractable cable 1602. The automatic control system 1604 is configured with upper and lower thresholds for the tension of the retractable and retractable cable during wave compensation. When the automatic control system 1604 detects that the tension of the retractable and retractable cable 1602 exceeds the upper threshold, the automatic control system 1604 controls the cable 1602 to release, maintaining the tension between the upper and lower thresholds. When the automatic control system 1604 detects that the tension of the retractable and retractable cable 1602 is below the lower threshold, the automatic control system controls the cable 1602 to tighten, maintaining the tension between the upper and lower thresholds.

[0084] Currently, the deployment and retraction of anchor balls before and after inter-ship bunkering operations relies on the coordination of shipboard personnel and cranes, performed one by one. This requires a large number of personnel, is time-consuming and labor-intensive, and poses safety risks, especially during rough seas. Furthermore, for V-shaped hulls, such as those found on many ro-ro passenger ships, anchor balls cannot be suspended in the required operating position (currently, they float on the water), rendering them ineffective in preventing collisions. Currently, fueling of new energy vehicles like LNG, methanol, and liquid ammonia is commonly performed alongside. To prevent collisions caused by turbulent waves, anchor balls are installed between the power vessel and the bunkering vessel. These anchor balls float on the water, providing a safe buffer between the two vessels and preventing collisions. For V-shaped hulls like those found on many ro-ro passenger ships, when lowered, they are located below the V, rendering them ineffective in preventing collisions. This vessel adopts an innovative design of the ball retracting and releasing device, which can quickly retract and release the ball and arrange it in the air, solving the bunkering needs of bunkering ships for V-type ships such as PCTC. While achieving rapid retraction and release of the ball, the ball can be arranged in the air. The ball retracting and releasing device has a wave compensation function, which can optimally reduce the force on the retracting and releasing device. It can not only reduce the bunkering time, increase the safety of bunkering, and reduce the bunkering cost, but also expand the bunkering service objects and increase the large bunkering market such as passenger and vehicle ferries.

[0085] The gantry ball retraction and lowering device in this project is equipped with an automatic control system for the gantry ball retraction and lowering device, a gantry ball retraction and lowering device hanger, and a lowering cable at the end of the gantry ball retraction and lowering device. When lowering the gantry ball, the hook at the end of the cable hooks the gantry ball. By folding the gantry ball retraction and lowering device hanger at a certain angle, the hanger can be lowered toward the side of the sea. At this time, the gantry ball retraction and lowering device automatic control system can be used to retract and lower the cable. The gantry ball can be controlled at any height from the side of the water to the sheer top plate. After inputting the control height, it is automatically retracted to the target position. During operation, according to the friction, gravity, and dynamic force acting on the gantry ball, the cable can be automatically fine-tuned so that the force on the cable does not exceed its set value. The control method is electric hydraulic.

[0086] Figures 12 to 13A multi-point suspension device 17 for a berthing ball is shown, wherein a berthing ball 1603 is suspended from eye plates 1701 or eye rings 1703 on the deck via anchor chains 1702. Four to eight eye plates 1701 or eye rings 1703 are provided on each side. Currently, during bunkering operations, the berthing ball is typically dropped into the water and then tied to the eye rings on the deck using anchor chains or wire ropes. The berthing ball floats on the water surface, and the anchor chain or wire rope merely prevents the berthing ball from drifting away and is not subject to significant forces. Therefore, the eye rings on the deck generally have a safe working load of approximately 5 tons. The berthing ball is secured to two eye rings on either side of the deck. However, for V-shaped receiving vessels or when two ships are berthing, the berthing ball is difficult to simultaneously dock at the parallel mid-section of both ships when floating on the water surface. This can cause the berthing ball to squeeze under the bilge of the vessel, thus failing to provide a safety buffer. Based on this, several more reinforced eye plates are set on the deck. For the three lashing balls on each side shown in the figure, it is not limited to only three lashing positions for the lashing balls. Instead, several more eye plates are evenly distributed along each side so that every two adjacent eye plates can achieve the function of lashing the lashing balls. At the same time, the eye plates are made stronger, and at least a single eye plate can withstand a force of more than 20t. For the specific calculation method, please refer to the schematic diagram. Figure 14 At this time, the eye plate can ensure that the berthing ball can be suspended and withstand the tension on the suspension cable when the two ships are berthing, so that the bunkering ship can berth and moor with various types of receiving ships.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multifunctional methanol transport and bunkering ship, characterized by: The cabin below the upper deck is divided into the following from bow to stern: the bow area, cargo hold area, engine room front area and engine room. The bow area includes the forepeak tank (1), the bow ballast tank (2) and the emergency fire pump room (3). The cargo hold area is double hull and double bottom. The double hull places on the side and the double bottom area at the bottom are 6 pairs of ballast tanks (6). The cargo hold area includes 1 pair of fuel oil and methanol liquid cargo tanks (4), 4 pairs of liquid cargo tanks (5), 1 pair of sewage tanks (10) and 1 pair of methanol fuel storage tanks (7). The engine room front area is provided with a methanol daily tank (8) and a methanol fuel preparation room (9). The main engine and auxiliary engine are arranged in the engine room. A midship loading and unloading-filling platform (13) and a bow filling platform (14) are arranged at the middle and bow of the upper deck, as well as a hydraulic hose crane (12) cooperating with the two; the midship loading and unloading-filling platform (13) is arranged above the liquid cargo tank (5), and the bow filling platform (14) is arranged above the fuel oil and methanol liquid cargo tank (4); the midship loading and unloading-filling platform (13) is arranged on the midship deck (1301), and a midship low-position loading and unloading-filling station (1303) and a midship high-position loading and unloading-filling station (1304) are arranged respectively through a midship loading and unloading-filling platform lifting device (1302); the bow filling platform (14) is arranged on the bow deck (1301), and a bow low-position filling station (1403) and a bow high-position filling station (1404) are arranged respectively through a bow filling station platform lifting device (1402); The loading and unloading-filling platform (13) and the bow filling platform (14) further include a retractable saddle (18), the retractable saddle (18) including a base (1801) fixed on the deck and a sliding hose bracket (1802), a U-shaped bent bracket (1803) for supporting a filling hose (1804) being arranged at the front end of the sliding hose bracket (1802); A roller is arranged between the sliding hose bracket (1802) and the base (1801), and the sliding hose bracket (1802) slides relative to the base (1801). When in operation, the sliding hose bracket (1802) slides outward from the ship's side, so that the U-shaped bend bracket (1803) moves completely outward from the ship's side, and the sliding hose bracket (1802) is fixed to the base (1801) by a limit pin (1805); when not in operation, the sliding hose bracket (1802) slides inward from the ship's side, so that the U-shaped bend bracket (1803) moves completely inward from the ship's side, and the sliding hose bracket (1802) is fixed to the base (1801) by a limit pin (1805); The bunkering vessel is also provided with a ball-supported retractable device (16), wherein a retractable cable (1602) is arranged on a retractable hanger (1601) in the ball-supported retractable device (16), and a ball (1603) is arranged at the bottom of the retractable cable (1602); the ball-supported retractable device (16) also includes an automatic control system (1604) for controlling the retractable cable (1602) to be retracted, released, and to compensate for waves; the automatic control system (1604) is provided with an upper threshold and a lower threshold of the tension of the retractable cable during wave compensation; the automatic control system When (1604) detects that the tension of the retractable cable (1602) exceeds the upper threshold, the retractable cable (1602) is controlled to be loosened so that the tension of the retractable cable (1602) is between the upper threshold and the lower threshold; when the automatic control system (1604) detects that the tension of the retractable cable (1602) is lower than the lower threshold, the retractable cable (1602) is controlled to be tightened so that the tension of the retractable cable (1602) is between the upper threshold and the lower threshold; the ball (1603) is controlled at any height between the water surface on the side and the side top column plate.

2. The multifunctional methanol transport and bunkering ship according to claim 1, characterized in that: The loading and unloading-filling platform (13) and the bow filling platform (14) also include an emergency release device, a quick connector, an anti-falling system, a ship distance measurement system and an electrical control system.

3. A multifunctional methanol transport and bunkering ship according to claim 2, characterized in that: The low-level loading and unloading-filling station (1303) and the mid-ship high-level loading and unloading-filling station (1304) include liquid cargo filling pipes, steam recovery pipes, tank sweeping pipes, fuel filling pipes, and auxiliary nitrogen and fresh water pipelines.

4. The multifunctional methanol transport and bunkering ship according to claim 2, characterized in that: The bow low-position filling station (1403) and the bow high-position filling station (1404) include a liquid cargo filling pipe, a steam recovery pipe, a fuel filling pipe, and auxiliary nitrogen and fresh water pipelines.

5. The multifunctional methanol transport and bunkering ship according to claim 1, characterized in that: The bunkering vessel is also provided with a multi-point suspension device (17), in which a ball (1603) is tied to an eye plate (1701) or an eye ring (1703) on the deck through an anchor chain (1702) and suspended thereon, and 4 to 8 eye plates (1701) or eye rings (1703) are provided on each side.

6. The multifunctional methanol transport and bunkering ship according to claim 5, characterized in that: A single eye ring (1605) or eye plate (1606) can withstand forces exceeding 20 tons.

7. The multifunctional methanol transport and bunkering ship according to claim 1, characterized in that: The bunkering ship also includes a methanol fuel supply system. A methanol delivery pump extracts methanol from a methanol fuel storage tank (7) and delivers it to a methanol daily tank (9). The methanol fuel in the methanol daily tank (9) is delivered to a main engine and an auxiliary engine in an engine room through a methanol supply unit and a control valve unit.

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