Liquefied carbon dioxide storage facilities and ships

Abstract

To restrain a carbon dioxide concentration from increasing locally when discharging carbon dioxide gas from the inside of a tank.SOLUTION: A liquefied carbon dioxide storage facility comprises: a tank capable of storing liquefied carbon dioxide; a pressure release device provided in the tank, and capable of releasing a pressure in the tank; and a discharge pipe extending from the pressure release device, and for discharging carbon dioxide gas from the inside of the tank to the outside. A discharge direction of the carbon dioxide gas in the discharge pipe is inclined upward with respect to a horizontal direction.SELECTED DRAWING: Figure 2

Description

Technical Field

[0005] , , , , , ,

[0001] The present disclosure relates to liquefied carbon dioxide storage equipment and ships.

Background Art

[0002] In a tank for storing liquefied gas, the pressure inside the tank may increase due to evaporation of the liquefied gas inside the tank or the like. For example, Patent Document 1 discloses a configuration in which such a tank is provided with a safety valve so that the pressure inside the tank does not rise excessively. The safety valve releases the gas inside the tank to the outside when the pressure inside the tank reaches a predetermined operating pressure value.

Prior Art Documents

Patent Documents

[0006] To solve the above problems, the liquefied carbon dioxide storage facility according to this disclosure comprises a tank, a pressure release device, and a discharge pipe. The tank is capable of storing liquefied carbon dioxide. The pressure release device is provided in the tank. The pressure release device is capable of releasing the pressure inside the tank. The discharge pipe extends from the pressure release device and discharges carbon dioxide gas from the tank to the outside. The direction of discharge of the carbon dioxide gas in the discharge pipe is inclined upward with respect to the horizontal. The discharge pipe includes an inclined pipe section that extends diagonally upward and is inclined with respect to both the vertical and horizontal directions. The tip of the inclined pipe section has a tip opening that opens diagonally upward and is capable of releasing the carbon dioxide gas. The direction of release of the carbon dioxide gas from the tip opening is the direction of extension of the inclined pipe section. The angle of inclination of the release direction with respect to the horizontal direction is 15° or more and 75° or less.

[0007] The vessel relating to this disclosure comprises a hull and a liquefied carbon dioxide storage facility as described above. [Effects of the Invention]

[0008] According to the liquefied carbon dioxide storage equipment and vessel of this disclosure, when carbon dioxide gas is discharged from the tank, it is possible to suppress localized increases in carbon dioxide concentration. [Brief explanation of the drawing]

[0009] [Figure 1] This is a plan view showing the schematic configuration of a vessel according to the embodiment of this disclosure. [Figure 2] This figure shows a liquefied carbon dioxide storage facility installed in a vessel according to an embodiment of the present disclosure, and is a cross-sectional view taken along line II-II in Figure 1. [Figure 3] This is a diagram showing a liquefied carbon dioxide storage facility installed in a vessel according to the embodiment of this disclosure, and is a cross-sectional view taken along line III-III in Figure 1. [Figure 4] This is a cross-sectional view showing a discharge tube according to an embodiment of the present disclosure. [Figure 5] This figure schematically shows the trajectory of carbon dioxide gas when it is released from the discharge pipe of a vessel according to the embodiment of this disclosure. [Modes for carrying out the invention]

[0010] Hereinafter, the liquefied carbon dioxide storage facility and vessel according to the embodiments of this disclosure will be described with reference to Figures 1 to 5. (Ship composition) In embodiments of this disclosure, the vessel 1 transports liquefied carbon dioxide. As shown in Figures 1 and 2, the vessel 1 comprises at least a hull 2 ​​and a liquefied carbon dioxide storage facility 10.

[0011] (Hull structure) The hull 2 ​​has a pair of side panels 3A and 3B that form its outer shell, a bottom 4 (see Figure 2), and an upper deck 5. The side panels 3A and 3B each have a pair of side platings that form the port and starboard sides, respectively. As shown in Figure 2, the bottom 4 has bottom platings that connect these side panels 3A and 3B. These pair of side panels 3A and 3B and the bottom 4 give the outer shell of the hull 2 ​​a U-shape in a cross section perpendicular to the bow-stern direction Da. The upper deck 5 exemplified in this embodiment is a full-length deck exposed to the outside. As shown in Figure 1, the hull 2 ​​has a superstructure 7 with living quarters formed on the upper deck 5, for example, on the stern side 2b. The position and size of the superstructure 7 can be changed as appropriate.

[0012] Within the hull 2, a cargo hold 8 is formed on the bow 2a side of the superstructure 7. The cargo hold 8 is recessed toward the bottom of the ship relative to the upper deck 5 and opens upward.

[0013] (Overall configuration of the liquefied carbon dioxide storage facility) Figure 3 is a diagram showing a liquefied carbon dioxide storage facility installed on a vessel according to an embodiment of this disclosure, and is a cross-sectional view taken along line III-III in Figure 1. As shown in Figures 2 and 3, the liquefied carbon dioxide storage facility 10 mainly consists of a tank 11, a pressure release device 30, and a discharge pipe 40 (see Figure 2). Note that in Figure 3, the pressure release device 30 is shown as a simplified rectangle.

[0014] (Tank configuration) As shown in FIG. 1, a plurality of tanks 11 are arranged side by side in the fore-and-aft direction Da within the cargo loading compartment 8. In an embodiment of the present disclosure, for example, two tanks 11 are arranged at intervals in the fore-and-aft direction Da. Each tank 11 is capable of storing liquefied carbon dioxide L.

[0015] As shown in FIG. 3, for example, the tank 11 has a cylindrical shape. The tank 11 extends with the fore-and-aft direction Da as the longitudinal direction Dx. The tank 11 includes a cylindrical portion 12 and a mirror plate portion 13. The cylindrical portion 12 extends in its longitudinal direction Dx. As shown in FIG. 2, in this embodiment, the cylindrical portion 12 is formed in a cylindrical shape, and the cross-sectional shape perpendicular to its longitudinal direction Dx is circular. As shown in FIG. 3, the mirror plate portions 13 are respectively arranged at both ends in the longitudinal direction Dx of the cylindrical portion 12. Each mirror plate portion 13 is hemispherical and closes the opening in the longitudinal direction Dx of the cylindrical portion 12. Note that the tank 11 may be arranged such that its longitudinal direction Dx follows the vertical direction Dv. Also, the tank 11 is not limited to a cylindrical shape and may have other shapes such as spherical or square.

[0016] For example, the tank 11 is provided with a loading pipe 15 and a discharging pipe 16. The loading pipe 15 and the discharging pipe 16 are respectively connected to the tank 11. Liquefied carbon dioxide L can flow through the loading pipe 15 and the discharging pipe 16 respectively.

[0017] The loading pipe 15 loads the liquefied carbon dioxide L supplied from the outside into the tank 11. The loading pipe 15, for example, penetrates the top of the tank 11 and extends from the inside to the outside of the tank 11 downward in the vertical direction Dv. The tip of the loading pipe 15 (in other words, the lower end in the vertical direction Dv) opens downward at the lower part inside the tank 11.

[0018] The discharge pipe 16 communicates with the inside of the tank 11. The discharge pipe 16, for example, penetrates the top of the tank 11 from the outside of the tank 11 and extends into the inside of the tank 11. The tip of the discharge pipe 16 is disposed at the lower part inside the tank 11. A pump 17 is provided at the tip of the discharge pipe 16. The pump 17 is disposed inside the tank 11. The pump 17 sucks in the liquefied carbon dioxide L inside the tank 11 and sends it out to the outside of the tank 11 through the discharge pipe 16.

[0019] (Configuration of pressure relief device, discharge pipe) As shown in FIGS. 2 and 3, the pressure relief device 30 is provided on the tank 11. The pressure relief device 30 is a so-called safety valve. When the pressure inside the tank 11 reaches a preset set pressure, the pressure relief device 30 releases the pressure inside the tank 11 to the outside. Note that the pressure relief device 30 can also be applied to uses such as adjusting the pressure inside the tank 11 for a desired purpose, in addition to the safety valve.

[0020] The pressure relief device 30 is connected to the tank 11 via a pipe 31. The pipe 31 is connected to the top of the tank 11, for example, and communicates with the gas phase inside the tank 11. In the gas phase inside the tank 11, mainly carbon dioxide gas G generated by the evaporation of the liquefied carbon dioxide L exists. A discharge pipe 40 (see FIG. 2) is connected to the pressure relief device 30. The pressure relief device 30 and the discharge pipe 40 are disposed above the upper deck 5, for example.

[0021] When the pressure of the gas phase inside the tank 11 is less than the preset set pressure, the pressure relief device 30 is in a closed state. When the pressure of the gas phase inside the tank 11 reaches the preset set pressure, the pressure relief device 30 becomes open and connects the pipe 31 and the discharge pipe 40. As a result, the carbon dioxide gas G in the gas phase inside the tank 11 is discharged from the pipe 31, through the pressure relief device 30, and to the outside through the discharge pipe 40.

[0022] The discharge pipe 40 extends from the pressure release device 30. The discharge pipe 40 releases carbon dioxide gas G from inside the tank 11 to the outside when the pressure release device 30 is open. The discharge pipe 40 is cylindrical, and the cross-sectional shape intersecting its extension direction may be circular or polygonal. The discharge pipe 40 can be made of a metallic material such as stainless steel alloy.

[0023] Figure 4 is a cross-sectional view showing a discharge tube according to an embodiment of this disclosure. As shown in Figure 4, the discharge pipe 40 has a connecting pipe section 41, an inclined pipe section 42, and a curved pipe section 43. The curved pipe section 43 is positioned between the connecting pipe section 41 and the inclined pipe section 42. As a result, when the pressure release device 30 is opened and carbon dioxide gas G is released from the pressure release device 30 to the discharge pipe 40, the carbon dioxide gas G is released into the outside atmosphere through the inclined pipe section 42 via the connecting pipe section 41 and the curved pipe section 43.

[0024] As shown in Figure 2, the connecting pipe 41 is connected to the pressure release section 30r of the pressure release device 30. In this embodiment, the connecting pipe 41 extends laterally from the pressure release section 30r, intersecting the vertical direction Dv, but the connecting pipe 41 may also extend upward from the pressure release section 30r, for example.

[0025] As shown in Figure 4, the curved pipe section 43 is provided between the connecting pipe section 41 and the inclined pipe section 42. The curved pipe section 43 is formed between the connecting pipe section 41 and the inclined pipe section 42. The curved pipe section 43 is curved with a curvature less than or equal to a predetermined value. When carbon dioxide gas G is released from the pressure release device 30 into the discharge pipe 40, the carbon dioxide gas G travels from the connecting pipe section 41 through the curved pipe section 43 to the inclined pipe section 42.

[0026] For example, if the discharge pipe 40 does not have a curved section 43, and the connection between the connecting pipe section 41 and the inclined pipe section 42 is bent without curving, the pressure loss with respect to the flow of carbon dioxide gas G will increase. This can lead to a localized drop in the pressure of carbon dioxide gas G, which may result in the formation of dry ice. In contrast, as in this embodiment, a curved pipe section 43 is provided between the connecting pipe section 41 and the inclined pipe section 42, and the curvature of the curved pipe section 43 is made as small as possible, thereby suppressing the pressure loss to carbon dioxide gas G in the curved pipe section 43 and preventing the formation of dry ice.

[0027] The inclined pipe section 42 is inclined with respect to both the vertical direction Dv and the horizontal direction Dh which is perpendicular to the vertical direction Dv, and extends diagonally upward from the connecting pipe section 41. In this embodiment, the vertical direction Dv refers to the vertical direction when the hull 2 ​​is not rolling. Also, in this specification, the horizontal direction Dh refers to the horizontal direction Dh when the hull 2 ​​is not rolling.

[0028] A tip opening 42h is formed at the tip 42t of the inclined pipe section 42 of the discharge pipe 40, opening diagonally upward. When the pressure release device 30 is open, carbon dioxide gas G is released from the tip opening 42h. The direction Ds of carbon dioxide gas G release from the inclined pipe section 42 to the tip opening 42h is the extension direction De of the inclined pipe section 42. In other words, the direction Ds of carbon dioxide gas G release in the discharge pipe 40 is inclined upward with respect to the horizontal direction Dh.

[0029] In such a liquefied carbon dioxide storage facility 10, the pressure release device 30 is kept closed during normal operation when the pressure of the gas phase in the tank 11 is below a preset pressure. In this state, the piping 31 and the discharge pipe 40 are isolated by the pressure release device 30. If, for any reason, the pressure of the gas phase in the tank 11 reaches a preset pressure, the pressure release device 30 opens, and the piping 31 and the discharge pipe 40 are connected. As a result, the carbon dioxide gas G in the gas phase of the tank 11 is released from the piping 31 through the pressure release device 30 to the discharge pipe 40. The carbon dioxide gas G released from the pressure release device 30 to the discharge pipe 40 is then released into the outside atmosphere through the connecting pipe section 41, the curved pipe section 43, and the inclined pipe section 42.

[0030] Figure 5 is a schematic diagram showing the trajectory of carbon dioxide gas when it is released from the discharge pipe of a vessel according to an embodiment of this disclosure. As shown in Figure 5, the discharge direction Ds of carbon dioxide gas G in the discharge pipe 40 is inclined upward with respect to the horizontal direction Dh. Therefore, the carbon dioxide gas G released from the discharge pipe 40 rises diagonally upward in the atmosphere in a parabolic trajectory, and then descends diagonally downward in the atmosphere. As the carbon dioxide gas G released from the discharge pipe 40 descends diagonally downward, when viewed from the vertical direction Dv, the carbon dioxide gas G diffuses more widely in the discharge direction Ds near the sea surface (or land surface if released towards land).

[0031] The height H to the highest point P1 reached by the carbon dioxide gas G released diagonally upward from the discharge pipe 40, and the distance D reached from the discharge pipe 40 to the point P2 reached at sea surface (land surface) after descending diagonally downward through the atmosphere, vary depending on various conditions such as the inclination angle θ of the discharge direction Ds of the carbon dioxide gas G in the discharge pipe 40 with respect to the horizontal direction Dh, the set pressure when the pressure release device 30 switches from a closed state to an open state, the opening diameter of the tip opening 42h of the discharge pipe 40, wind speed, the cruising speed of the ship 1, temperature, and atmospheric pressure. For example, under certain conditions, the highest height H reached by the carbon dioxide gas G released from the discharge pipe 40 can be several hundred meters or more.

[0032] Furthermore, if carbon dioxide gas G is released horizontally in the Dh direction, and there are other ships, offshore floating structures, land-based facilities, etc. to the side of the pressure release device 30 in the horizontal Dh direction, the released carbon dioxide gas G may cause a localized increase in the concentration of carbon dioxide in the atmosphere.

[0033] Therefore, it is preferable to set the inclination angle θ of the carbon dioxide gas G discharge direction Ds with respect to the horizontal direction Dh in the discharge pipe 40 so that when the carbon dioxide gas G discharged diagonally upward from the discharge pipe 40 descends diagonally downward, it does not affect other ships, offshore floating facilities, land-based facilities, etc. The inclination angle θ of the carbon dioxide gas G discharge direction Ds with respect to the horizontal direction Dh can be, for example, 15° or more and 75° or less. The inclination angle θ of the discharge direction Ds with respect to the horizontal direction Dh can also be, for example, 30° or more and 60° or less.

[0034] Furthermore, in this embodiment, the liquefied carbon dioxide storage facility 10 is provided on the ship 1. In this case, it is preferable that the discharge direction Ds of carbon dioxide gas G from the inclined pipe section 42 of the discharge pipe 40 be set in a direction that intersects the bow-stern direction Da when viewed from the vertical direction Dv (for example, in the ship's width direction). For example, if the release direction Ds of carbon dioxide gas G is directed towards the bow 2a side of the ship in the bow-stern direction Da, and carbon dioxide gas G is released diagonally upward from the release pipe 40 of a ship 1 in motion, there is a possibility that the released carbon dioxide gas G will descend through the atmosphere in a parabolic trajectory, and the ship 1, which was continuing to sail after the release, may come into contact with (pour into) it. Furthermore, if the direction Ds of carbon dioxide gas G is directed towards the bow 2a side of the ship in the forward-stern direction Da, there is a possibility that the carbon dioxide gas G released from the discharge pipe 40 may collide with the superstructure 7. Therefore, as shown in Figure 2, the discharge direction Ds of carbon dioxide gas G from the inclined pipe section 42 of the discharge pipe 40 may be set to, for example, one side in the ship width direction Dw connecting the ship sides 3A and 3B when viewed from the vertical direction Dv. Furthermore, in order to avoid releasing carbon dioxide gas G towards the land when the ship 1 is docked in a port or the like, the orientation of the inclined pipe section 42 of the discharge pipe 40 may be adjusted (changed) so that the discharge direction Ds of carbon dioxide gas G from the inclined pipe section 42 of the discharge pipe 40 faces the ocean side in the ship width direction Dw.

[0035] (Effects and Benefits) In the liquefied carbon dioxide storage facility 10 and ship 1 of the above embodiment, the discharge direction Ds of the carbon dioxide gas G in the discharge pipe 40 is inclined upward with respect to the horizontal direction Dh. This prevents the carbon dioxide gas G released from the pressure release device 30 from falling downwards and allows it to diffuse away from the pressure release device 30. Furthermore, it prevents the carbon dioxide concentration from becoming locally high at a location to the side of the pressure release device 30, as would occur if the carbon dioxide gas G were released in the horizontal direction Dh. Therefore, when discharging carbon dioxide gas G from the tank 11, it is possible to prevent the carbon dioxide concentration from becoming locally high.

[0036] Furthermore, in the above embodiment, by setting the inclination angle of the discharge direction Ds with respect to the horizontal direction Dh to 15° or more and 75° or less, the carbon dioxide gas G released from the pressure release device 30 is prevented from falling down in a localized manner, while being effectively diffused away from the pressure release device 30.

[0037] Furthermore, in the above embodiment, by setting the inclination angle of the discharge direction Ds with respect to the horizontal direction Dh to 30° or more and 60° or less, the carbon dioxide gas G released from the pressure release device 30 can be more effectively diffused away from the pressure release device 30 while suppressing it from falling down in a localized manner.

[0038] Furthermore, in the above embodiment, the discharge pipe 40 has a connecting pipe section 41 and an inclined pipe section 42. As a result, carbon dioxide gas G is discharged from the pressure release device 30, through the connecting pipe section 41, and from the inclined pipe section 42 which extends inclined upward with respect to the horizontal direction Dh. This prevents the carbon dioxide gas G released from the pressure release device 30 from falling down and allows it to diffuse away from the pressure release device 30.

[0039] Furthermore, in the above embodiment, a curved pipe section 43 is provided between the connecting pipe section 41 and the inclined pipe section 42. This allows carbon dioxide gas G to be released from the connecting pipe section 41 through the curved pipe section 43 to the inclined pipe section 42 while suppressing a pressure drop of carbon dioxide gas G. Therefore, the generation of dry ice in the discharge pipe 40 is suppressed.

[0040] (Other embodiments) Although embodiments of this disclosure have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments and may include design changes and the like that do not depart from the gist of this disclosure. In the above embodiment, the configuration of the liquefied carbon dioxide storage facility 10 is shown, but the configuration of each part can be changed as appropriate. Furthermore, although the above configuration was shown as the hull 2 ​​of the vessel 1 in the embodiment described above, the configuration of each part of the hull 2 ​​of the vessel 1 can be changed as appropriate.

[0041] Furthermore, although the above embodiment describes a configuration in which the liquefied carbon dioxide storage facility 10 is installed on a ship 1, the liquefied carbon dioxide storage facility 10 may also be installed on the floating body of an offshore floating facility, on land-based liquefied gas storage facilities, etc. When the liquefied carbon dioxide storage facility 10 is installed on land-based liquefied gas storage facilities, it is preferable that the discharge direction Ds of the carbon dioxide gas G released from the discharge pipe 40 be directed towards the ocean side rather than towards the land side where other buildings, etc., are located.

[0042] <Note> The liquefied carbon dioxide storage facility 10 and the vessel 1 described in the embodiment can be understood, for example, as follows.

[0043] (1) The liquefied carbon dioxide storage facility 10 according to the first embodiment comprises a tank 11 capable of storing liquefied carbon dioxide L, a pressure release device 30 provided in the tank 11 capable of releasing the pressure inside the tank 11, and a discharge pipe 40 extending from the pressure release device 30 to discharge carbon dioxide gas G from the tank 11 to the outside, wherein the discharge direction Ds of the carbon dioxide gas G in the discharge pipe 40 is inclined upward with respect to the horizontal direction Dh.

[0044] In this liquefied carbon dioxide storage facility 10, if the pressure inside the tank 11 storing liquefied carbon dioxide L rises, the pressure inside the tank 11 is released by the pressure release device 30. The carbon dioxide gas G inside the tank 11 is released to the outside through the discharge pipe 40 from the pressure release device 30. Since the discharge direction Ds of the carbon dioxide gas G in the discharge pipe 40 is inclined upward with respect to the horizontal direction Dh, the carbon dioxide gas G released from the pressure release device 30 is prevented from falling downwards and is diffused away from the pressure release device 30. In addition, it is possible to prevent a localized increase in carbon dioxide concentration at a location to the side of the pressure release device 30, as would occur if the carbon dioxide gas G were released in the horizontal direction Dh. Therefore, when releasing carbon dioxide gas G from inside the tank 11, it is possible to prevent a localized increase in carbon dioxide concentration.

[0045] (2) The liquefied carbon dioxide storage facility 10 according to the second embodiment is the liquefied carbon dioxide storage facility 10 of (1), wherein the inclination angle of the discharge direction Ds with respect to the horizontal direction Dh is 15° or more and 75° or less.

[0046] This allows the angle of inclination of the release direction Ds relative to the horizontal direction Dh to be set to 15° or more and 75° or less, thereby preventing the carbon dioxide gas G released from the pressure release device 30 from falling locally and instead dispersing well away from the pressure release device 30.

[0047] (3) The liquefied carbon dioxide storage facility 10 according to the third embodiment is the liquefied carbon dioxide storage facility 10 of (2), wherein the inclination angle of the discharge direction Ds with respect to the horizontal direction Dh is 30° or more and 60° or less.

[0048] This allows the angle of inclination of the release direction Ds relative to the horizontal direction Dh to be set to 30° or more and 60° or less, thereby suppressing the localized downward flow of carbon dioxide gas G released from the pressure release device 30, while enabling better diffusion away from the pressure release device 30.

[0049] (4) The fourth embodiment of the liquefied carbon dioxide storage facility 10 is any one of the liquefied carbon dioxide storage facilities 10 of (1) to (3), wherein the discharge pipe 40 has a connecting pipe section 41 that is connected to the pressure release device 30 and extends from the pressure release device 30, and an inclined pipe section 42 that extends from the connecting pipe section 41 inclined upward with respect to the horizontal direction Dh.

[0050] As a result, carbon dioxide gas G is released from the pressure relief device 30 through the connecting pipe section 41 and out of the inclined pipe section 42 which extends upward with respect to the horizontal direction Dh. This prevents the carbon dioxide gas G released from the pressure relief device 30 from falling downwards and allows it to diffuse away from the pressure relief device 30.

[0051] (5) The liquefied carbon dioxide storage facility 10 according to the fifth embodiment is the liquefied carbon dioxide storage facility 10 of (4), wherein the discharge pipe 40 further comprises a curved pipe section 43 provided between the connecting pipe section 41 and the inclined pipe section 42, which is curved with a curvature of less than or equal to a predetermined value.

[0052] This allows carbon dioxide gas G to flow from the connecting pipe section 41 through the curved pipe section 43 to the inclined pipe section 42 while suppressing a pressure drop in the carbon dioxide gas G. Therefore, the generation of dry ice in the discharge pipe 40 is suppressed.

[0053] (6) The vessel 1 according to the sixth embodiment comprises a hull 2 ​​and one of the liquefied carbon dioxide storage facilities 10 from (1) to (5).

[0054] This makes it possible to provide a vessel 1 equipped with a liquefied carbon dioxide storage facility 10 that can suppress localized increases in carbon dioxide concentration when carbon dioxide gas G is discharged from the tank 11. [Explanation of Symbols]

[0055] 1...Ship 2...Hull 2a...Bow 2b...Stern 3A, 3B...Side 4...Bottom 5...Upper deck 7...Superstructure 8...Cargo loading compartment 10...Liquefied carbon dioxide storage equipment 11...Tank 12...Cylindrical section 13...End plate section 15...Loading piping 16...Discharge piping 17...Pump 30...Pressure release device 30r...Pressure release section 31...Piping 40...Discharge pipe 41...Connecting pipe section 42...Inclined pipe section 42h...End opening 42t...End 43...Curved pipe section D...Reach Da...Bow-stern direction De...Extending direction Dh...Horizontal direction Ds...Discharge direction Dv...Up-down direction Dw...Width direction Dx...Longitudinal direction G...Carbon dioxide gas L...Liquefied carbon dioxide P1...Highest reach P2...Position H...Height θ...Inclination angle

Claims

1. A tank capable of storing liquefied carbon dioxide, A pressure release device is provided in the tank and capable of releasing the pressure inside the tank, The system includes a discharge pipe extending from the pressure release device for releasing carbon dioxide gas from inside the tank to the outside, The aforementioned discharge pipe is It is equipped with an inclined pipe section that extends diagonally upward, inclined in both the vertical and horizontal directions, The tip of the inclined pipe section is formed with a tip opening that opens diagonally upward, allowing the carbon dioxide gas to be released. The direction of release of the carbon dioxide gas from the tip opening is the direction of extension of the inclined pipe section. The angle of inclination of the discharge direction with respect to the horizontal direction is 15° or more and 75° or less. Liquefied carbon dioxide storage facility.

2. The angle of inclination of the discharge direction with respect to the horizontal direction is 30° or more and 60° or less. A liquefied carbon dioxide storage facility according to claim 1.

3. The aforementioned discharge pipe is The system further comprises a connecting pipe section connected to and extending from the pressure release device, The inclined pipe section extends from the connecting pipe section, inclined upward with respect to the horizontal direction. A liquefied carbon dioxide storage facility according to claim 1 or 2.

4. The discharge pipe further comprises a curved pipe section provided between the connecting pipe section and the inclined pipe section. The liquefied carbon dioxide storage facility according to claim 3.

5. The hull and, A liquefied carbon dioxide storage facility according to claim 1 or 2, comprising ship.

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