CO2 transport and injection into ships

Abstract

The present invention relates to the field of ship technology, and more particularly to a carbon dioxide transport and injection vessel, comprising a hull having, from bow to stern, a first region, a second region, a third region, and a fourth region; multiple groups of cargo storage tanks, with the multiple groups of cargo storage tanks arranged in the third region; a heating and gasification module disposed in the second region; an injection module connected to the heating and gasification module; a mooring device disposed in the second region; and a propulsion device disposed in the fourth region for driving the vessel. The present invention enables CO2 transport and injection at sea.

Description

Technical Field

[0001] The present invention relates to the technical field of ships, and in particular to a carbon dioxide transport and injection ship. Background Art

[0002] In existing technologies, geological storage of CO2 can be used as one of the important technical means for global carbon reduction. In particular, using depleted oil fields or suitable geological structures as geological storage sites for CO2 is a relatively good choice.

[0003] As global carbon reduction efforts progress, the demand for large-scale CO2 transport and injection at sea will continue to grow. Currently, there are precedents for the operation of CO2 transport vessels both domestically and internationally, but their primary purpose is to transport CO2 and they cannot be used directly for injection at sea.

[0004] Therefore, a carbon dioxide transport and injection ship is needed to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide a carbon dioxide transport and injection vessel capable of realizing CO2 transportation and injection at sea.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] CO2 transport and injection into ships, including:

[0008] A hull, wherein the hull is divided into a first area, a second area, a third area, and a fourth area from the bow to the stern;

[0009] a plurality of groups of cargo storage tanks, the plurality of groups of cargo storage tanks being arranged in the third area, the cargo storage tanks being used to store liquid CO2;

[0010] a heating and gasification module, disposed in the second area and located above the deck, the heating and gasification module being in communication with the cargo storage tank and configured to heat and gasify the CO2;

[0011] an injection module, connected to the heating and gasification module, located in the second area and below the deck, capable of injecting gasified CO2 into the seabed for storage;

[0012] a mooring device, the mooring device being arranged in the second area and located at the bottom of the second area, the mooring device being capable of being connected to a fixed point for offshore operations;

[0013] A propulsion device is provided in the fourth area, and is used to drive the ship to move.

[0014] Furthermore, the first area is provided with a storage room, an empty compartment and a ballast tank in sequence from top to bottom, and the storage room, the empty compartment and the ballast tank are all located below the deck.

[0015] Furthermore, a bow thruster is provided at the lower portion of the second area.

[0016] Furthermore, a cargo hose crane is provided on the deck of the third area for hoisting the delivery pipe connected to the gas storage device at the dock onto the deck.

[0017] Furthermore, a buffer tank is provided between the heating and gasification module and the injection module, and both the heating and gasification module and the injection module are communicated with the buffer tank.

[0018] Furthermore, the propulsion device includes a main engine and a propeller, the main engine is arranged in the fourth area, and the propeller is transmission-connected to the main engine.

[0019] Furthermore, the propulsion device also includes a gear transmission and a shaft generator, the gear transmission is respectively connected to the main engine and the propeller, the shaft generator is connected to the gear transmission, and the shaft generator is electrically connected to the heating and gasification module.

[0020] Furthermore, it also includes a fuel storage tank, which is arranged in the third area and is connected to the main engine.

[0021] Furthermore, a ventilation mast is provided on the deck of the third area, and the ventilation mast is connected to multiple groups of the cargo storage tanks and the fuel storage tanks.

[0022] Furthermore, the fourth area is a cabin area, and an azimuth pod propeller is provided at the bottom of the fourth area.

[0023] Beneficial effects of the present invention:

[0024] The present invention provides a carbon dioxide transport and injection ship, the hull of which is divided into a first area, a second area, a third area and a fourth area from the bow to the stern. A plurality of groups of cargo storage tanks are arranged in the third area, and the cargo storage tanks are used to store liquid CO2. A heating gasification module and an injection module are provided in the second area. The heating gasification module can heat the liquid CO2 in the cargo storage tank into a gaseous state, and inject the gaseous CO2 back into the seabed through the injection module for sealing. A mooring device is provided in the second area, and the mooring device is connected to a fixed point for offshore operations to realize the positioning of the hull in the sea. A propulsion device is provided in the fourth area, and the propulsion device is used to drive the ship to move to realize the transportation of CO2. Through the above arrangement, CO2 transportation and offshore injection can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of a carbon dioxide transport and injection ship according to the present invention;

[0026] Figure 2 This is a schematic diagram of a type of cargo storage tank in a ship for transporting and injecting carbon dioxide into the present invention;

[0027] Figure 3 is a schematic diagram of another type of carbon dioxide transport and injection into a cargo storage tank in a ship according to the present invention;

[0028] Figure 4 The figure is a top view of a carbon dioxide transport and injection ship according to the present invention.

[0029] In the picture:

[0030] 1. First area; 11. Storage room; 12. Void compartment; 13. Ballast tank; 2. Second area; 21. Heating and vaporization module; 22. Injection module; 23. Mooring device; 24. Bow thruster; 3. Third area; 31. Cargo storage tank; 32. Cargo hose crane; 33. Fuel storage tank; 34. Breathing mast; 4. Fourth area; 41. Azimuth pod thruster; 5. Propulsion device; 51. Main engine; 52. Gearbox; 53. Propeller; 54. Shaft generator. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only show portions relevant to the present invention, not all of them.

[0032] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed or detachable connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention.

[0033] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0034] When CO2 is injected and stored on the seabed, in order to realize CO2 transportation and offshore injection, Figure 1-Figure 4 As shown, the present invention provides a carbon dioxide transport and injection ship, which includes a hull, multiple groups of cargo storage tanks 31 , a heating and gasification module 21 , an injection module 22 , a mooring device 23 , and a propulsion device 5 .

[0035] The hull, from bow to stern, comprises the first area 1, the second area 2, the third area 3, and the fourth area 4. Multiple cargo storage tanks 31 are arranged in the third area 3 and located below the deck. The cargo storage tanks 31 are used to store liquid CO2. A heating and gasification module 21 is arranged in the second area 2 and located above the deck. The heating and gasification module 21 is connected to the cargo storage tanks 31 and is used to heat and gasify the CO2. An injection module 22 is connected to the heating and gasification module 21 and is located in the second area 2 and below the deck. The injection module 22 can inject the gasified CO2 into the seabed for storage. Specifically, in this embodiment, the injection module 22 includes an air pump that pressurizes the CO2 and then pumps it into the seabed for storage. A mooring device 23 is arranged in the second area 2 and located at the bottom of the second area 2. The mooring device 23 can be connected to a fixed point for offshore operations, thereby fixing the ship's position at sea. A propulsion device 5 is arranged in the fourth area 4 and is used to drive the ship.

[0036] Furthermore, the mooring device 23 is secured to the offshore operation site via 6-8 catenary chains. A pipeline for CO2 transport is located in the center of the mooring device 23, allowing high-pressure CO2 from the vessel to be directly injected into a CO2 storage well on the seabed for permanent storage. A hydraulic power unit is installed within the hull to power the underwater mooring turret. In other embodiments, the mooring device 23 can be deployed above the deck of the first area 1 for mooring, without further limitation.

[0037] Furthermore, a bow thruster 24 is provided at the lower portion of the second region 2. By providing the bow thruster 24, the position of the ship can be adjusted when the ship is positioned, thereby facilitating mooring of the ship at sea.

[0038] Furthermore, the fourth area 4 is the engine room area, and an azimuth podded propeller 41 is provided at the bottom of the fourth area 4. By providing the azimuth podded propeller 41, when in use, the azimuth podded propeller 41 is activated and cooperated with the bow thruster 24 to adjust the ship's posture, thereby facilitating the ship's mooring in the sea.

[0039] Furthermore, the first area 1 is provided with a storage room 11, a void space 12, and a ballast tank 13, from top to bottom, all of which are located below the deck. The ballast tank 13 ensures the stability of the hull, the void space 12 ensures the buoyancy of the ship, and the storage room 11 can be used for storage.

[0040] Furthermore, a cargo hose crane 32 is installed on the deck of the third area 3. This crane is used to lift the delivery pipe connected to the dock gas storage device onto the deck. This arrangement facilitates the adjustment of the delivery pipe's position and connects it to the cargo storage tank 31 to achieve CO2 delivery.

[0041] Furthermore, in this embodiment, four groups of cargo storage tanks 31 and eight independent cargo storage tanks 31 are arranged in the third area 3 for storing liquid CO2 received from the dock. The volume of a single cargo storage tank 31 is about 6,250 cubic meters, and the total tank capacity can reach 50,000 cubic meters. The cargo storage tank 31 has a design pressure of 8 bar and a design minimum temperature of minus 55 degrees Celsius. It is a semi-cold and semi-pressure liquid tank. At this temperature and pressure, the CO2 in the cargo storage tank 31 can remain in a liquid state, thereby enabling the transportation of CO2. In order to maintain the temperature of the cargo storage tank 31, a refrigerator is provided in the third area 3 for cooling. A thermometer is provided in this area. When the temperature is higher than the set temperature and stabilizes, the refrigerator works to cool.

[0042] Furthermore, a buffer tank is installed between the heating and gasification module 21 and the injection module 22. Both modules are connected to the buffer tank. Specifically, the heating and gasification module 21 is used to heat the cryogenic liquid CO2 carried on the ship to above zero degrees Celsius and pressurize it to approximately 150 bar. The pressurized CO2 is then temporarily placed in the buffer tank for pressure stabilization before being injected into the system.

[0043] Furthermore, the propulsion device 5 includes a main engine 51 and a propeller 53. The main engine 51 is fixedly arranged in the fourth area 4, and the propeller 53 is connected to the main engine 51. The main engine 51 drives the propeller 53 to rotate, thereby propelling the ship to move, thereby achieving the movement of the ship.

[0044] Furthermore, the propulsion unit 5 also includes a gearbox 52 and a shaft generator 54. The gearbox 52 is connected to the main engine 51 and the propeller 53, respectively. The shaft generator 54 is connected to the gearbox 52, and the shaft generator 54 is electrically connected to the heating and gasification module 21. The gearbox 52 allows for precise control of the propeller 53's rotational speed. The gearbox 52 also drives the shaft generator 54 to generate electricity. The electricity generated by the shaft generator 54 is then stabilized and rectified, supplying the heating and gasification module 21 and the chiller. Specifically, five shaft generators 54 are located on the upper deck of the fourth area 4, near the aft end, providing a peak power of approximately 17,000 kW. The ship's electricity can also be transmitted via cables in the mooring system 23 to other unmanned work platforms at sea for temporary use.

[0045] The CO2 transport and injection vessel further includes fuel storage tanks 33, located in the third area 3 and connected to the main engine 51. Specifically, these tanks consist of two LNG fuel tanks, each with a capacity of 1,000 cubic meters, for a total of 2,000 cubic meters. Furthermore, fuel tanks are located on both sides of the ship in the fourth area 4. Once the natural gas is used up, fuel oil can be used for propulsion. The vessel has a carrying capacity of up to 50,000 cubic meters of CO2 and a cruising range of up to 10,000 nautical miles.

[0046] Furthermore, a vent mast 34 is fixedly mounted on the deck of the third area 3 and is connected to multiple groups of cargo storage tanks 31 and fuel storage tanks 33. The vent mast 34 allows for pressure regulation in the cargo and fuel storage tanks 31 and 33. When the pressure in these tanks exceeds a set value, gas is discharged through the vent mast 34, thereby stabilizing the pressure in these tanks and eliminating potential safety hazards. To ensure the safety of the fuel storage tanks 33, in this embodiment, a pressure relief valve is installed on the vent mast 34 and is connected to the fuel storage tanks 33.

[0047] The workflow of this carbon dioxide transport and injection ship is as follows:

[0048] First, the vessel receives liquid CO2 from shore via cargo storage tanks 31 aboard the vessel. The liquid CO2 is then injected into eight independent cargo storage tanks 31 via cargo pipelines. After leaving the port, the vessel sails offshore until it reaches a designated injection point. The vessel then activates its bow thrusters 24 and azimuthing pod thrusters 41 to anchor the vessel near the injection point. The mooring system 23 pulls the catenary near the injection point onto the mooring system 23 via a traction device and secures it. After mooring, the pipelines within the turret are docked with those at the injection point. After docking, the onboard power station is activated, pumping the low-temperature CO2 from the cargo storage tanks 31 into the heating and vaporization module 21. Electric heating heats and vaporizes the CO2 to above zero degrees Celsius, approximately 150 bar. The heated and expanded CO2 is then fed into a buffer tank. Once the pressure stabilizes, the high-pressure gaseous CO2 is injected directly into the seabed storage area via the injection module 22, completing the receiving and injection process.

[0049] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A carbon dioxide transport and injection vessel, characterized in that: include: A hull, wherein the hull is divided into a first area (1), a second area (2), a third area (3) and a fourth area (4) from the bow to the stern; a plurality of groups of cargo storage tanks (31), the plurality of groups of cargo storage tanks (31) being arranged in the third area (3), the cargo storage tanks (31) being used to store liquid CO2; a heating and gasification module (21), arranged in the second area (2) and located above the deck, the heating and gasification module (21) being in communication with the cargo storage tank (31) and being used for heating and gasifying CO2; an injection module (22) in communication with the heating and gasification module (21), the injection module (22) being located in the second area (2) and below the deck, and capable of injecting gasified CO2 into the seabed for storage; a mooring device (23), the mooring device (23) being arranged in the second area (2) and located at the bottom of the second area (2), the mooring device (23) being capable of being connected to a fixed point for offshore operations; a propulsion device (5), the propulsion device (5) being arranged in the fourth area (4), the propulsion device (5) being used to drive the ship to move; A buffer tank is provided between the heating and gasification module (21) and the injection module (22), and both the heating and gasification module (21) and the injection module (22) are in communication with the buffer tank.

2. The carbon dioxide transport and injection ship according to claim 1, characterized in that: The first area (1) is provided with a storage room (11), an empty compartment (12) and a ballast compartment (13) in sequence from top to bottom, and the storage room (11), the empty compartment (12) and the ballast compartment (13) are all located below the deck.

3. The carbon dioxide transport and injection ship according to claim 1, characterized in that: A bow thruster (24) is provided at the lower portion of the second area (2).

4. The carbon dioxide transport and injection ship according to claim 1, characterized in that: A cargo hose crane (32) is provided on the deck of the third area (3) for hoisting a delivery pipe connected to a gas storage device at the dock onto the deck.

5. The carbon dioxide transport and injection ship according to claim 1, characterized in that: The propulsion device (5) comprises a main engine (51) and a propeller (53), wherein the main engine (51) is arranged in the fourth area (4), and the propeller (53) is connected to the main engine (51) in a transmission manner.

6. The carbon dioxide transport and injection ship according to claim 5, characterized in that: The propulsion device (5) further includes a gear transmission (52) and a shaft generator (54), wherein the gear transmission (52) is respectively connected to the main engine (51) and the propeller (53), the shaft generator (54) is connected to the gear transmission (52), and the shaft generator (54) is electrically connected to the heating and gasification module (21).

7. The carbon dioxide transport and injection ship according to claim 5, characterized in that: The invention also includes a fuel storage tank (33), which is arranged in the third area (3) and communicates with the main engine (51).

8. The carbon dioxide transport and injection ship according to claim 7, characterized in that: A ventilation mast (34) is provided on the deck of the third area (3), and the ventilation mast (34) is connected to multiple groups of cargo storage tanks (31) and the fuel storage tanks (33).

9. The carbon dioxide transport and injection ship according to claim 1, characterized in that: The fourth area (4) is a cabin area, and a full-rotation pod propeller (41) is provided at the bottom of the fourth area (4).

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