Storage vessel for optimal shipboard storage of liquid carbon dioxide captured and liquefied using onboard carbon dioxide capture technology

Abstract

Disclosed is a storage vessel for optimal shipboard storage of liquid carbon dioxide captured and liquefied using onboard carbon dioxide capture technology, wherein the storage vessel can provide a configuration of a liquid carbon dioxide storage vessel that can be rapidly applied to existing LNG carriers, and that can maximize storage space while minimizing the effect of design changes on the design and manufacture of new LNG carriers. The storage vessel for optimal shipboard storage of liquid carbon dioxide captured and liquefied using onboard carbon dioxide capture technology comprises: at least one pair of plate-shaped supports that are open on top and on both sides, have three-layered curved surface support portions formed on the inside, and are spaced apart from each other in the left-right direction; and a three-layered storage vessel body supported by being mounted on the three-layered curved surface support portions of the pair of plate-shaped supports, wherein the at least one pair of plate-shaped supports and the three-layered storage vessel body are integrally coupled.

Description

Storage container for optimal onboard storage of liquid carbon dioxide captured and liquefied using onboard carbon dioxide capture technology

[0001] The present invention relates to a carbon dioxide storage container and an improvement in the shape thereof, and in particular, to a storage container suitable for use in storing liquefied carbon dioxide and an improvement in the shape thereof.

[0002] The International Maritime Organization (IMO) and many countries, primarily in Europe, have set decarbonization goals and are making efforts to achieve them, and Korea is also participating in these efforts. In particular, the strengthening of short-term measures by the IMO regarding greenhouse gas (GHG) emissions from ships requires enhanced onboard carbon dioxide capture capabilities. As regulations on reducing carbon dioxide emissions from ships are expected to become increasingly stricter in the future, onboard carbon dioxide capture systems, which capture, liquefy, and store carbon dioxide (hereinafter also referred to as CO2) contained in the exhaust gases of ship engines, are attracting attention.

[0003] Among the various capture methods for onboard carbon dioxide capture systems, the wet capture method using an aqueous amine solution is considered to be a technology with high technical feasibility.

[0004] Referring to FIG. 1, a ship (10) is equipped with a ship engine (11). The ship engine (11) obtains energy by burning fuel supplied from a fuel tank (13). Accordingly, the ship engine (11) emits exhaust gas, which contains a large amount of carbon dioxide.

[0005] A carbon dioxide capture system (20) is installed on the ship (10) to capture carbon dioxide contained in the exhaust gas. The carbon dioxide capture system (20) is intended to capture carbon dioxide from the exhaust gas to be discharged into the chimney (14).

[0006] The carbon dioxide captured in the carbon dioxide capture system (20) is condensed and liquefied in the liquefaction device (50) and then stored in a liquid state in a storage container (60).

[0007] Liquid carbon dioxide storage containers are used in liquid carbon dioxide carriers, and they are stored in a vertical position. However, due to the weight of the high-pressure gas container itself and the weight of the liquid carbon dioxide, storage efficiency is reduced, and since they are stored upright, they act as an obstacle to the stable operation of the carrier. Prior art related to such liquid carbon dioxide storage containers is disclosed in Registration No. 10-1516993 (Title of Invention: Ventilation System for Liquid Carbon Dioxide Carrier, Inventors: Park Beom-jin et al.).

[0008] In addition, the trilobite tank is known as a previously known carbon dioxide storage container. The trilobite tank is formed by combining three horizontally arranged storage containers at 120-degree intervals, with two unit storage containers placed at the bottom and one unit storage container combined on top, and its side profile is roughly the shape of a triangle with rounded corners.

[0009] In addition, although Type C high-pressure CO2 storage vessels are known, their application to modular LNG vessels presents problems such as reduced loading efficiency, difficulties in deck space utilization due to low storage density, and difficulties in ensuring visibility from the bridge when installing high-pressure carbon dioxide (CCO2, Compressed CO2) and liquid carbon dioxide (LCO2, Liquefied CO2) storage vessels on the deck. Furthermore, existing LCO2 storage vessels positioned lengthwise on the deck may face structural safety issues due to bending stress and fatigue failure during the vessel's hogging and sagging.

[0010] In addition, approximately 4,000 tons of CO2 can be captured per LNG vessel voyage (around 14 days), and the weight of the container is estimated to be about 800 tons, which may lead to a decrease in the vessel's stability when applied to the upper deck.

[0011] The objective of the present invention is to provide a liquefied carbon dioxide storage container and its shape optimized for LNG carriers.

[0012] Another objective of the present invention is to provide a liquefied carbon dioxide storage container and its shape that can minimize changes to the design of a newly manufactured LNG carrier.

[0013] Another objective of the present invention is to provide a liquefied carbon dioxide storage container and its shape that can be easily applied to existing LNG carriers.

[0014] Another objective of the present invention is to provide a liquefied carbon dioxide storage container and its shape that can secure space by extending the central cross-section of the hull near the bridge, rather than utilizing the existing deck space.

[0015] Another objective of the present invention is to provide a liquefied carbon dioxide storage container and its shape applicable to a ship having a cargo tank in which the width of the middle section is wider than that of the upper and lower sections.

[0016] A storage container for optimal storage of liquid carbon dioxide captured and liquefied by the onboard carbon dioxide capture technology according to the present invention is characterized by comprising: at least one pair of plate-shaped supports arranged spaced apart from left to right, which are open upward and to both sides and have three layers of curved surface supports formed inside; and a three-layer storage container body integrally combined with the three layers of curved surface supports of the pair of plate-shaped supports.

[0017] Preferably, the above-described three-layer curved surface support comprises: a first curved surface support formed on the inner bottom of the plate-shaped support and connected to the bottom curved surface, having a pair of first concave curved surfaces formed outwardly on the upper sides of the bottom curved surface and a first opening that opens upwardly at the central upper portion; a second curved surface support formed on the upper side of the first curved surface support, having a pair of second concave curved surfaces formed outwardly on both sides of the first opening and a second opening that opens upwardly at the central upper portion; and a third curved surface support formed on the upper side of the second curved surface support, having a pair of third concave curved surfaces formed outwardly only halfway on both sides of the second opening.

[0018] The above-described three-layer storage container body preferably includes a first storage container supported by the first curved support portion of the pair of plate-shaped supports, with both sides protruding laterally from the first curved support portion; a second storage container fixed integrally with the first storage container on the first storage container and supported by the second curved support portion, with both sides protruding laterally from the second curved support portion; and a third storage container fixed integrally with the second storage container on the second storage container and supported by the third curved support portion, with both sides protruding shorter than the third curved support portion.

[0019] A storage container for optimal storage of liquid carbon dioxide captured and liquefied by the above-described onboard carbon dioxide capture technology is characterized in that the line connecting the outer edges of the three-layered storage container body and a pair of plate-shaped supports forms an octagon.

[0020] A storage container for optimal onboard storage of liquid carbon dioxide captured and liquefied by the above-mentioned onboard carbon dioxide capture technology may be intended to be installed in an LNG carrier cargo tank.

[0021] An anti-rolling support may be installed on the top of the third storage container to secure the third storage container to the hull of the vessel or to an adjacent storage container or structure in preparation for the lateral movement of the vessel.

[0022] According to the present invention, a shape of a liquid carbon dioxide storage container that can be rapidly applied to existing LNG carriers can be provided.

[0023] According to the present invention, it is possible to maximize storage space while minimizing the impact of design changes on the design and manufacture of new LNG carriers.

[0024] According to the present invention, storage space efficiency can be maximized by minimizing dead space in the cargo space.

[0025] According to the present invention, the simplification of the cargo hold design facilitates manufacturing, and by eliminating conflicting parts between deck operations and CO2 loading and unloading operations during cargo loading and unloading, rapid loading and unloading of cargo is enabled.

[0026] According to the present invention, although there is a disadvantage of linear change occurring, it is advantageous in terms of ensuring visibility from the bridge and stability by enabling the installation of a CO2 storage container inside the hull.

[0027] Figure 1 is a conceptual diagram of a typical onboard carbon dioxide capture system.

[0028] FIG. 2 is a perspective view showing the shape of a storage container for optimal storage on board a ship of liquid carbon dioxide captured and liquefied by the onboard carbon dioxide capture technology according to the present invention.

[0029] FIG. 3 is an exploded perspective view of a storage container for optimal onboard storage of liquid carbon dioxide captured and liquefied by the onboard carbon dioxide capture technology of FIG. 2.

[0030] FIG. 4 is a drawing showing the cross-sectional shape of an LNG carrier cargo tank,

[0031] Figure 5 is a perspective view showing a modified example of Figure 2.

[0032] [Explanation of the symbol]

[0033] 70: LNG carrier 72: Cargo tank

[0034] 100: Storage container for optimal onboard storage of liquid carbon dioxide captured and liquefied using onboard carbon capture technology

[0035] 110: Plate-shaped support 110a: 3-layer curved surface support

[0036] 112: First curved support 112a: Bottom curved part

[0037] 112b: First concave surface 112c: First open section

[0038] 114: Second curved support 114a: Second concave curved part

[0039] 114b: Second opening 116: Third curved support

[0040] 116a: Third concave surface 116b: Third opening

[0041] 130: 3rd layer storage container body 132: 1st storage container

[0042] 134: Second storage container 136: Third storage container

[0043] 138: Inlet

[0044] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0045] Referring to FIG. 2 and FIG. 3, the shape of the storage container (100) for optimal storage of liquid carbon dioxide captured and liquefied by the onboard carbon dioxide capture technology according to the present invention has a shape in which a pair of plate-shaped supports (110) and a three-layer storage container body (130) are integrally joined, preferably by welding.

[0046] The plate-shaped support (110) is open to the upper and both sides in the longitudinal direction of the storage container body (130) of the third layer, and has a shape in which a three-layer curved surface support (110a) is formed inside. A pair of such plate-shaped support (110) are arranged with a gap between them on the left and right sides.

[0047] The three-layer curved surface support (110a) is composed of a first curved surface support (112), a second curved surface support (114), and a third curved surface support (116).

[0048] The first curved support member (112) is formed on the inner bottom of the plate-shaped support member (110) and has a shape having an elliptical arc bottom curved section (112a), a pair of first concave curved sections (112b) connected to the bottom curved section (112a) and formed on the upper sides of the bottom curved section (112a) that are concave outwardly, and a first opening section (112c) that opens the central upper part upwardly.

[0049] The second curved support member (114) has a shape having a pair of second concave curved sections (114a) that are outwardly concave on both sides of the first opening (112c) above the first curved support member (112), and a second opening (114b) that opens the central upper part upward.

[0050] The third curved support member (116) forms a pair of third concave curved sections (116a) that are half-concave outwardly on both sides of the second open section (114b) above the second curved support member (114), and the central upper part of the third curved support member (116) forms the third open section (116b).

[0051] The first curved surface support (112) to the third curved surface support (116) as described above are formed to match the surface contours of the bottom surface and both sides of the three-layer storage container body (130).

[0052] Accordingly, the storage container body (130) of the third layer is stably coupled to and supported by the curved surface support part (110a) of the third layer of a pair of plate-shaped supports (110), taking on a supported shape.

[0053] As described, the storage container body (130) of the third layer has a shape in which the first storage container (132), the second storage container (134), and the third storage container (136) are stacked vertically in order.

[0054] The first storage container (132) is supported by the first curved support portion (112) of a pair of plate-shaped supports (110), and has a shape in which both sides protrude to the sides of the first curved support portion (112) while supported by the pair of plate-shaped supports (110).

[0055] The second storage container (134) is a part that is fixed integrally with the first storage container (132) on the first storage container (132) and supported by the second curved support member (114). The second storage container (134) has a shape in which both sides protrude laterally from the second curved support member (114) while supported by a pair of plate-shaped support members (110), and the degree of protrusion is preferably the same as that of the first storage container (132).

[0056] The third storage container (136) is fixed integrally with the second storage container (134) on the second storage container (134) and supported by the third curved support member (116), and has a shape in which both sides protrude more than the third curved support member (116) but protrude shorter than the first storage container (132) and the second storage container (134).

[0057] Accordingly, the shape of the storage container (100) for optimal storage of liquid carbon dioxide captured and liquefied by the onboard carbon dioxide capture technology according to the present invention is such that the line connecting the outer edges of the three-layer storage container body (130) and a pair of plate-shaped supports (110) forms an octagon, and as shown in FIG. 4, it can be seen that it is suitable for mounting in the cargo tank (72) of an LNG carrier (70) having an octagonal cross-sectional shape inside.

[0058] A pipe in which a valve and a pressure gauge are installed for injecting or discharging liquefied gases such as liquefied carbon dioxide is connected to an injector (138). Since the pipe installed at the injector (138) can be modified in various ways, it has been omitted from the drawings of the present invention.

[0059] According to the present invention, it is possible to provide a shape of a liquid carbon dioxide storage container that can be rapidly applied to existing LNG carriers, minimize the impact of design changes on the design and production of new LNG carriers, maximize storage space, maximize storage space efficiency by minimizing dead space in the cargo space, facilitate production through the simplification of the cargo tank design, enable rapid loading and unloading of cargo by eliminating conflicting parts between deck operations and CO2 loading and unloading operations during cargo loading and unloading, and achieve the effect of being advantageous in terms of visibility from the bridge and stability by enabling the installation of a CO2 storage container inside the hull.

[0060] Referring to FIG. 5, an anti-rolling support member (139) may be installed on the upper surface of the third storage container (136) to secure the third storage container (136) to the hull of the ship or to an adjacent storage container or structure using a rope or the like, in preparation for the lateral movement of the ship.

[0061] Additionally, the injection port (138a) is formed on the upper surface of the third storage container (136), and the lid (138b) can be used to open and close the injection port (138a).

[0062] And the plate support (110) can be constructed by welding small members such as plate members or pipes.

[0063] The rest is the same as explained earlier.

[0064] The present invention has the potential to be used in making liquid carbon dioxide storage containers, and in particular, in making storage containers for the optimal onboard storage of liquid carbon dioxide captured and liquefied using onboard carbon dioxide capture technology. Additionally, the present invention has the potential to be used in making liquid carbon dioxide storage tanks for dedicated liquid carbon dioxide carriers.

Claims

1. At least one pair of plate-shaped supports spaced apart from left to right, open to the upper and both sides and having three layers of curved surface supports formed inside; and A storage container for optimal storage of liquid carbon dioxide captured and liquefied by onboard carbon dioxide capture technology, characterized by including a shape formed by integrally combining a three-layer storage container body that is mounted and supported on a three-layer curved surface support of a pair of plate-shaped supports.

2. In paragraph 1, the curved surface support of the three layers is, A first curved support member having an elliptical arc bottom curved surface formed on the inner bottom of the plate-shaped support member, a first curved support member connected to the bottom curved surface, a pair of first concave curved surfaces formed outwardly on the upper sides of the bottom curved surface, and a first opening that opens the central upper portion upward; A second curved support member having a second opening that forms a pair of second concave curved sections that are outwardly concave on both sides of the first opening above the first curved support member and opens the central upper part upward; and A storage container for optimal storage of liquid carbon dioxide captured and liquefied by onboard carbon dioxide capture technology, characterized by including a third curved surface support member that forms a pair of third concave curved surfaces that are half-concave outwardly on both sides of the second opening above the second curved surface support member.

3. The storage container for optimal storage of liquid carbon dioxide captured and liquefied by onboard carbon dioxide capture technology according to claim 1, wherein the storage container body of the three layers comprises: a first storage container supported by the first curved support portion of the pair of plate-shaped supports and having both sides protruding laterally from the first curved support portion; a second storage container fixed integrally with the first storage container on the first storage container and supported by the second curved support portion, having both sides protruding laterally from the second curved support portion; and a third storage container fixed integrally with the second storage container on the second storage container and supported by the third curved support portion, having both sides protruding shorter than the third curved support portion.

4. A storage container for optimal storage of liquid carbon dioxide captured and liquefied by onboard carbon dioxide capture technology according to any one of claims 1 to 3, wherein the line connecting the outer edges of the three-layered storage container body and a pair of plate-shaped supports forms an octagon.

5. A storage container for optimal storage of liquid carbon dioxide captured and liquefied by onboard carbon dioxide capture technology, characterized in that, in any one of paragraphs 1 to 3, the storage container for optimal storage of liquid carbon dioxide captured and liquefied by the onboard carbon dioxide capture technology is intended to be installed in an LNG carrier cargo tank.

6. A storage container for optimal storage of liquid carbon dioxide captured and liquefied by onboard carbon dioxide capture technology, characterized in that, in any one of claims 1 to 3, an anti-rolling support is installed on the top of the third storage container to secure the third storage container to the hull of the vessel or an adjacent storage container or structure in preparation for lateral movement of the vessel.

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