Liquefied carbon dioxide storage device

Abstract

This liquefied carbon dioxide storage facility is provided with: a tank capable of storing liquefied carbon dioxide; a pressure release device which is provided in the tank and is capable of releasing the pressure inside the tank; a discharge pipe having a cylindrical shape extending upward from the pressure release device; and a cap provided at the upper end of the discharge tube, the cap having: a closing part for closing the upper end opening of the discharge tube; and a cylindrical part which has a cylindrical shape extending downward from the closing part, and which is slidably fitted to the outer peripheral surface of the discharge tube.

Description

Technical Field

[0001] The invention relates to a liquefied carbon dioxide storage device.

[0002] This application claims priority from Japanese Patent Application No. 2022-133143 filed in Japan on August 24, 2022, and the contents are incorporated herein by reference. Background Art

[0003] In a tank containing liquefied gas, the pressure inside the tank may rise due to evaporation of the liquefied gas inside the tank. For example, Patent Document 1 discloses a structure in which such a tank is provided with a safety valve to prevent the pressure inside the tank from rising excessively. The safety valve releases the gas inside the tank to the outside when the pressure inside the tank reaches a predetermined working pressure value.

[0004] Prior art literature

[0005] Patent Document 1: Japanese Patent No. 6582347 Summary of the invention

[0006] Problems to be solved by the invention

[0007] However, when the liquefied gas stored in the tank is liquefied carbon dioxide, it is necessary to prevent rainwater and the like from entering the pipe that discharges the carbon dioxide gas released from the safety valve to the atmosphere. For example, when rainwater enters the pipe from the opening at the front end of the pipe, the rainwater may freeze due to contact with the carbon dioxide gas released at a low temperature.

[0008] In addition, when an intrusion prevention member is provided above the opening of the pipe to prevent rainwater from intruding into the pipe, when the carbon dioxide gas passes through the gap between the opening of the pipe and the intrusion prevention member, the pressure of the carbon dioxide gas may drop, and the temperature of the carbon dioxide gas may drop. When the temperature of the carbon dioxide gas drops to a temperature below the sublimation line (freezing point) of the phase transition from gas to solid, dry ice may be generated. When dry ice is generated, the gap between the opening of the pipe and the intrusion prevention member is blocked, which may hinder the release of carbon dioxide gas.

[0009] Furthermore, by continuously releasing carbon dioxide gas from the tank, even when the pressure in the tank drops, the temperature also drops by the same amount, and there is a possibility that dry ice is generated.

[0010] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a liquefied carbon dioxide storage device capable of smoothly releasing carbon dioxide gas while suppressing the generation of dry ice in a release pipe for releasing carbon dioxide gas from a tank.

[0011] Means for solving problems

[0012] In order to solve the above-mentioned problems, the liquefied carbon dioxide storage device of the present invention comprises: a tank, a pressure release device, a discharge pipe and a cover. The tank can store liquefied carbon dioxide. The pressure release device is provided in the tank. The pressure release device can release the pressure in the tank. The discharge pipe is in the shape of a cylinder extending upward from the pressure release device. The cover is provided at the upper end of the discharge pipe. The cover has a closing portion and a cylinder portion. The closing portion closes the upper end opening of the discharge pipe. The cylinder portion is in the shape of a cylinder extending downward from the closing portion and can be slidably fitted on the outer peripheral surface of the discharge pipe.

[0013] Effects of the Invention

[0014] According to the liquefied carbon dioxide storage equipment of the present invention, in the release pipe for releasing the carbon dioxide gas from the tank, the carbon dioxide gas can be released smoothly while suppressing the generation of dry ice. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a diagram showing a schematic configuration of a liquefied carbon dioxide storage facility according to an embodiment of the present disclosure.

[0016] Figure 2 It is a cross-sectional view showing a discharge pipe and a cap according to an embodiment of the present disclosure.

[0017] Figure 3 This is a cross-sectional view showing a state where the cap slides upward due to the carbon dioxide gas released from the release pipe according to the embodiment of the present disclosure.

[0018] Figure 4 This is a cross-sectional view showing a state in which the cap according to the embodiment of the present disclosure has fallen off from the upper end of the discharge pipe.

[0019] Figure 5 It is a cross-sectional view showing a discharge pipe and a cap according to a modified example of the embodiment of the present disclosure. DETAILED DESCRIPTION

[0020] Below, refer to Figure 1~Figure 5 Next, a liquefied carbon dioxide storage facility according to an embodiment of the present invention will be described.

[0021] (Overall structure of liquefied carbon dioxide storage equipment)

[0022] like Figure 1 As shown, the liquefied carbon dioxide storage facility 1 in this embodiment includes at least a tank 2 , a discharge pipe 20 , a pressure release device 30 , and a cover 50 .

[0023] (Tank structure)

[0024] The tank 2 can store liquefied carbon dioxide L. The tank 2 is installed in the hull of a ship, the floating body of an offshore floating facility, a liquefied gas storage facility on land, etc. The tank 2 stores the liquefied carbon dioxide L in a high pressure state higher than the triple point pressure of carbon dioxide.

[0025] The tank 2 is, for example, cylindrical. The cylindrical tank 2 illustrated in the present embodiment includes a cylindrical portion 3 and an end plate portion 4. The cylindrical portion 3 extends along its central axis direction Dc. In this embodiment, the central axis direction Dc is also a horizontal direction perpendicular to the up-down direction Dv (in other words, the vertical direction). The central axis direction Dc may be consistent with the horizontal direction or may be inclined relative to the horizontal direction. In this embodiment, the cylindrical portion 3 is formed into a cylindrical shape, and the cross-sectional shape orthogonal to the central axis direction Dc is circular. The end plate portions 4 are respectively arranged at both ends of the cylindrical portion 3 in the central axis direction Dc. Each end plate portion 4 is hemispherical and closes the opening of the cylindrical portion 3 in the central axis direction Dc.

[0026] The tank 2 may be arranged so that its central axis direction Dc coincides with the vertical direction Dv. The tank 2 is not limited to a cylindrical shape, but may be in other shapes such as a spherical shape or a square shape.

[0027] The tank 2 is provided with, for example, a loading pipe 11, a discharge pipe 12, and a pump 13. The loading pipe 11 and the discharge pipe 12 are connected to the tank 2, respectively.

[0028] The loading pipe 11 guides the liquefied carbon dioxide L supplied from the outside into the tank 2. The loading pipe 11 passes through the top of the tank 2, for example, and extends from the upper side to the lower side in the vertical direction Dv inside and outside the tank 2. The front end of the loading pipe 11 (in other words, the lower end in the vertical direction Dv) opens downward at the lower part inside the tank 2.

[0029] The discharge pipe 12 guides the liquefied carbon dioxide L stored in the tank 2 to the outside of the tank 2. The discharge pipe 12 extends from the outside of the tank 2 through the top of the tank 2, for example, to the inside of the tank 2. The base end of the discharge pipe 12 is arranged at the lower part of the tank 2. The base end of the discharge pipe 12 is connected to the outlet of the pump 13.

[0030] The pump 13 is disposed in the tank 2 , sucks the liquefied carbon dioxide L stored in the tank 2 , and delivers it to the outside of the tank 2 through the discharge pipe 12 .

[0031] (Pressure release device, release pipe structure)

[0032] The pressure release device 30 is provided in the tank 2. The pressure release device 30 is a so-called safety valve. When the pressure in the tank 2 reaches a preset set pressure, the pressure release device 30 releases the pressure in the tank 2 to the outside. As the preset set pressure, the same pressure as the upper limit value of the design pressure of the tank 2 or a pressure slightly lower than the upper limit value can be exemplified. In addition, the pressure release device 30 can be used for purposes other than the safety valve to adjust the pressure in the tank 2 for a desired purpose.

[0033] The pressure release device 30 is connected to the tank 2 via a connecting pipe 31. The connecting pipe 31 is connected to, for example, the top of the tank 2 and communicates with the gas phase in the tank 2. The gas phase in the tank 2 mainly contains carbon dioxide gas G generated by evaporation of liquefied carbon dioxide L. The pressure release device 30 is connected to a discharge pipe 20.

[0034] The discharge pipe 20 has, for example, a connection portion 21 and an upward extension portion 22. The discharge pipe 20 is cylindrical, and the cross-sectional shape intersecting the extension direction thereof may be circular or polygonal. The discharge pipe 20 is formed of, for example, a metal material such as a stainless steel alloy.

[0035] The connection portion 21 is connected to the pressure opening portion 30r of the pressure release device 30. The connection portion 21 of the present embodiment extends from the pressure opening portion 30r in a direction intersecting the vertical direction Dv, but may extend directly upward from the pressure opening portion 30r, for example.

[0036] The upper extension portion 22 extends upward in the vertical direction Dv from the connection portion 21. In the present embodiment, the upper extension portion 22 extends vertically upward. The upper extension portion 22 may be inclined with respect to both the vertical direction and the horizontal direction perpendicular to the vertical direction and extend obliquely upward.

[0037] When the liquefied carbon dioxide storage facility 1 is installed on a ship's hull or a floating body of offshore floating equipment, the vertical direction and the horizontal direction refer to the vertical direction and the horizontal direction of the ship's hull or the floating body of offshore floating equipment in a stationary state without swinging.

[0038] Figure 2 It is a cross-sectional view showing a discharge pipe and a cap according to an embodiment of the present disclosure.

[0039] like Figure 2 As shown, an upper end opening 20h opening upward in the vertical direction Dv is formed at the upper end 20t of the upward extension portion 22 of the discharge pipe 20. When the pressure release device 30 is opened, the carbon dioxide gas G is discharged upward from the upper end opening 20h.

[0040] (Lid Structure)

[0041] The cap 50 is provided at the upper end 20t of the discharge pipe 20. The cap 50 has a sealing portion 51 and a cylindrical portion 52 integrally.

[0042] The closing portion 51 closes the upper end opening 20h of the discharge pipe 20 from above. The closing portion 51 is in the shape of a plate extending in a direction intersecting the up-down direction Dv. For example, when the cross-sectional shape of the discharge pipe 20 is circular, the closing portion 51 is formed in the shape of a circular plate when viewed from the up-down direction Dv. For example, when the cross-sectional shape of the discharge pipe 20 is polygonal, the closing portion 51 is formed in the shape of a polygonal plate when viewed from the up-down direction Dv. The closing portion 51 extends outward from the upper end 20t of the discharge pipe 20 in a direction intersecting the up-down direction Dv. In other words, the closing portion 51 has an outer peripheral edge located slightly outside the outer peripheral edge of the upper end 20t of the discharge pipe 20 viewed from above. The closing portion 51 is placed on the upper end 20t of the discharge pipe 20. A handle or the like for easy gripping by an operator when attaching and detaching the cap 50 relative to the upper end 20t of the discharge pipe 20 may also be provided on the closing portion 51.

[0043] The barrel 52 is in the shape of a barrel extending downward from the outer peripheral edge of the closing portion 51 in the vertical direction Dv. For example, when the cross-sectional shape of the discharge pipe 20 is circular, the barrel 52 is formed in a cylindrical shape when viewed from the vertical direction Dv. For example, when the cross-sectional shape of the discharge pipe 20 is polygonal, the barrel 52 is formed in a polygonal barrel shape when viewed from the vertical direction Dv. The inner peripheral surface 52f of the barrel 52 faces the outer peripheral surface 20f of the discharge pipe 20. The barrel 52 is externally fitted to the outer peripheral surface 20f of the discharge pipe 20 in a manner that allows sliding in the vertical direction Dv. In addition, the inner peripheral surface 52f of the barrel 52 may face the outer peripheral surface 20f of the discharge pipe 20 with a slight gap therebetween.

[0044] The cap 50 is configured to be detachable from the upper end 20 t of the discharge pipe 20 by moving upward in the up-down direction Dv from a state where the upper end opening 20 h is closed by the closing portion 51 .

[0045] The length L of the cylindrical portion 52 of the cap 50 in the up-down direction Dv is preferably set so that the cap 50 does not accidentally fall off from the upper end 20 t of the discharge pipe 20 due to wind, shaking, or the like.

[0046] The cover 50 is formed of, for example, at least one of a rubber material, a synthetic resin material, and a wood material. Here, the wood material includes wood, plywood, cork, and the like. By forming the cover 50 from at least one of a rubber material, a synthetic resin material, and a wood material, it is possible to suppress the cover 50 from being corroded by rainwater and the like and rusting. In addition, the cover 50 may be formed from a stretchable material such as a rubber material, and when the cover 50 is attached to the upper end 20t of the discharge pipe 20, it may be fixed to the discharge pipe 20 by the contraction force of the cylinder 52.

[0047] The cap 50 is connected to the discharge pipe 20 via a connecting member 55. The connecting member 55 is made of a flexible material such as a rope, a chain, a wire, or a belt. One end of the connecting member 55 is locked with a cap-side locking portion 56 formed on the cap 50. The other end of the connecting member 55 is locked with a discharge pipe-side locking portion 26 formed on the discharge pipe 20. The length of the connecting member 55 is set to have a surplus length that does not hinder the cap 50 from being removed from the upper end 20t of the discharge pipe 20 by moving upward in the vertical direction Dv from a state where the upper end opening 20h is closed by the closing portion 51.

[0048] Figure 3 This is a cross-sectional view showing a state where the cap slides upward due to the carbon dioxide gas released from the release pipe according to the embodiment of the present disclosure. Figure 4 This is a cross-sectional view showing a state in which the cap according to the embodiment of the present disclosure has fallen off from the upper end of the discharge pipe.

[0049] like Figure 2 As shown, in the liquefied carbon dioxide storage device 1, the pressure release device 30 is in a closed state when the pressure of the gas phase in the tank 2 is lower than a preset set pressure. In this state, the connecting pipe 31 and the discharge pipe 20 are cut off by the pressure release device 30. The cap 50 is usually provided at the upper end 20t of the discharge pipe 20 to close the upper end opening 20h.

[0050] On the other hand, when the pressure of the gas phase in the tank 2 reaches a preset set pressure for some reason, the pressure release device 30 becomes open, and the connecting pipe 31 communicates with the discharge pipe 20. As a result, the gas phase carbon dioxide gas G in the tank 2 is discharged from the connecting pipe 31 to the discharge pipe 20 through the pressure opening portion 30r of the pressure release device 30.

[0051] like Figure 3 As shown, the pressure of the carbon dioxide gas G released through the discharge pipe 20 acts on the sealing portion 51 of the cap 50, thereby pressing the sealing portion 51 upward. As a result, the cap 50 slides along the outer peripheral surface 20f of the discharge pipe 20 in the extension direction of the discharge pipe 20 (upward in the vertical direction Dv) as the pressure in the tank 2 rises. At this time, the pressure of the carbon dioxide gas G acts roughly evenly on the entire surface of the sealing portion 51 from the upper end opening 20h, so the cap 50 moves smoothly along the extension direction of the discharge pipe 20. Then, as shown in FIG. Figure 4 As shown, the cap 50 is removed from the discharge pipe 20, thereby opening the upper end opening 20h of the discharge pipe 20. After the cap 50 is removed, the carbon dioxide gas G is discharged from the upper end opening 20h of the discharge pipe 20 toward the atmosphere above.

[0052] After releasing the pressure in the tank 2, when the pressure in the tank 2 drops below the set pressure, the pressure release device 30 returns to the closed state. After the pressure release device 30 returns to the closed state, the cap 50 is reinstalled on the upper end 20t of the discharge pipe 20 by the operator.

[0053] (Effect)

[0054] In the liquefied carbon dioxide storage equipment of the above-mentioned embodiment, the upper end 20t of the discharge pipe 20 is closed by the cap 50. Thus, in a state where the pressure in the tank 2 does not rise and the pressure release device 30 does not release the pressure in the tank 2, the cap 50 prevents rainwater from entering the discharge pipe 20 and the pressure release device 30. Therefore, rainwater does not freeze in the discharge pipe 20, and the operation of the pressure release device 30 can be prevented from being hindered.

[0055] In addition, when the pressure in the tank 2 storing the liquefied carbon dioxide L increases, when the pressure in the tank 2 is released by the pressure release device 30, the carbon dioxide gas G in the tank 2 is released from the pressure release device 30 to the discharge pipe 20. The cap 50 provided at the upper end 20t of the discharge pipe 20 is pressed by the carbon dioxide gas G released from the tank 2 through the sealing portion 51 and is detached from the upper end 20t of the discharge pipe 20. At this time, the cylinder 52 slides on the outer peripheral surface 20f of the discharge pipe 20, so that the cap 50 is smoothly detached along the extending direction of the discharge pipe 20. After the cap 50 is detached from the upper end opening 20h of the discharge pipe 20, the carbon dioxide gas G released from the tank 2 is released to the outside from the upper end opening 20h of the discharge pipe 20. At this time, since there is no object blocking the carbon dioxide gas G released from the discharge pipe 20, it is possible to suppress the pressure drop of the carbon dioxide gas G due to the narrowing of the flow path of the carbon dioxide gas G. Therefore, it is possible to suppress the carbon dioxide gas G from solidifying and generating dry ice.

[0056] As a result, in the release pipe 20 for releasing the carbon dioxide gas G from the tank 2, the carbon dioxide gas G can be released smoothly while suppressing the generation of dry ice.

[0057] In addition, in the above-mentioned embodiment, the connecting member 55 connects the cap 50 and the discharge pipe 20. Therefore, when the pressure in the tank 2 is released by the pressure release device 30 and the cap 50 is separated from the upper end 20t of the discharge pipe 20, the connection state of the separated cap 50 and the discharge pipe 20 is maintained by the connecting member 55. Thus, it is possible to suppress the cap 50 from being scattered or lost.

[0058] In the above embodiment, the pressure release device 30 is a safety valve. Therefore, when the pressure in the tank 2 reaches a preset set pressure, the safety valve as the pressure release device 30 opens to release the pressure in the tank 2. In the discharge pipe 20 equipped with such a safety valve, when the safety valve is opened, the carbon dioxide gas G can be smoothly discharged while suppressing the generation of dry ice.

[0059] In addition, in the above-mentioned embodiment, the cap 50 is formed of at least one of a rubber material, a synthetic resin material, and a wood material. Therefore, even when rainwater or the like enters the gap between the inner peripheral surface 52f of the cylinder portion 52 of the cap 50 and the outer peripheral surface 20f of the discharge pipe 20, it is possible to suppress the inner peripheral surface 52f of the cap 50 from corroding and rusting. Therefore, it is possible to prevent the inner peripheral surface 52f of the cap 50 from being fixed to the outer peripheral surface 20f of the discharge pipe 20, so that when the pressure in the tank 2 is released by the pressure release device 30, the cap 50 can be smoothly detached from the upper end 20t of the discharge pipe 20.

[0060] In addition, in the above-described embodiment, as the pressure in the tank 2 increases, the cylindrical portion 52 slides along the outer peripheral surface 20f of the discharge pipe 20 in the extending direction of the discharge pipe 20, and the cap 50 falls off from the discharge pipe 20, thereby opening the upper end opening 20h of the discharge pipe 20. Therefore, when the pressure in the tank 2 is released by the pressure release device 30, the cap 50 falls off from the discharge pipe 20 smoothly, and the upper end opening 20h of the discharge pipe 20 can be opened smoothly.

[0061] (Other embodiments)

[0062] As mentioned above, although the embodiment of this disclosure is described in detail with reference to drawings, the specific structure is not limited to this embodiment, and design changes etc. which do not deviate from the gist of this disclosure are also included.

[0063] In the above embodiment, the entire cover 50 is formed of at least one of a rubber material, a synthetic resin material, and a wood material, but the invention is not limited thereto. For example, the entire cover 50 may be formed of a stainless steel alloy or a titanium alloy, a composite material, or the like that is resistant to corrosion by rainwater or the like.

[0064] For example, the sealing portion 51 may be formed of a metal material such as a stainless steel alloy like the discharge pipe 20, and only the cylinder portion 52 may be formed of at least one of a rubber material, a synthetic resin material, and a wood material.

[0065] Figure 5 It is a cross-sectional view showing a discharge pipe and a cap according to a modified example of the embodiment of the present disclosure.

[0066] like Figure 5As shown in the modified example, the sealing portion 51 and the cylinder 52 of the cap 50B may be formed of a metal material such as a stainless steel alloy like the discharge pipe 20, and a covering member 59 formed of at least one of a rubber material, a synthetic resin material, and a wood material may be provided so as to cover the inner peripheral surface 52f of the cylinder 52. Furthermore, the inner peripheral surface 52f of the cylinder 52 may be subjected to a surface treatment using a material having corrosion resistance to rainwater or the like.

[0067] In the above embodiment, the pressure release device 30 and the release pipe 20 are provided separately from the loading pipe 11 and the discharge pipe 12, but the present invention is not limited thereto. For example, the pressure release device 30 and the release pipe 20 may be provided in the loading pipe 11 and the discharge pipe 12.

[0068] Furthermore, in the above-described embodiment, an example of the structure of the liquefied carbon dioxide storage facility 1 is shown, but the structure of each part can be changed appropriately.

[0069] <Note>

[0070] The liquefied carbon dioxide storage facility 1 described in the embodiment can be understood, for example, as follows.

[0071] (1) A liquefied carbon dioxide storage device 1 of a first embodiment comprises: a tank 2 capable of storing liquefied carbon dioxide L; a pressure release device 30 provided in the tank 2 and capable of releasing the pressure in the tank 2; a discharge pipe 20 in the form of a cylinder extending upward from the pressure release device 30; and a cover 50 provided at an upper end 20t of the discharge pipe 20, wherein the cover 50 comprises: a closing portion 51 for closing an upper end opening 20h of the discharge pipe 20; and a cylindrical portion 52 in the form of a cylinder extending downward from the closing portion 51 and slidably fitted onto an outer peripheral surface 20f of the discharge pipe 20.

[0072] The discharge pipe 20 extending upward is not limited to extending vertically upward, but may also extend obliquely upward.

[0073] In the liquefied carbon dioxide storage facility 1, the upper end 20t of the discharge pipe 20 is closed by the cap 50. Thus, when the pressure in the tank 2 does not rise and the pressure release device 30 does not release the pressure in the tank 2, the cap 50 prevents rainwater from entering the discharge pipe 20 and the pressure release device 30. Therefore, rainwater does not freeze in the discharge pipe 20, and the operation of the pressure release device 30 can be prevented from being hindered.

[0074] In addition, when the pressure in the tank 2 storing the liquefied carbon dioxide L increases, when the pressure in the tank 2 is released by the pressure release device 30, the carbon dioxide gas G in the tank 2 is released from the pressure release device 30 to the discharge pipe 20. The cap 50 provided at the upper end 20t of the discharge pipe 20 is pressed by the carbon dioxide gas G released from the tank 2 through the sealing portion 51 and detached from the upper end 20t of the discharge pipe 20. At this time, the cylinder 52 slides on the outer peripheral surface 20f of the discharge pipe 20, so the cap 50 is smoothly detached along the extending direction of the discharge pipe 20. After the cap 50 is detached from the upper end opening 20h of the discharge pipe 20, the carbon dioxide gas G released from the tank 2 is released to the outside from the upper end opening 20h of the discharge pipe 20. At this time, since there is no object blocking the carbon dioxide gas G released from the discharge pipe 20, the pressure of the carbon dioxide gas G can be suppressed due to the narrowing of the flow path of the carbon dioxide gas G. Therefore, it is possible to suppress the carbon dioxide gas G from solidifying and generating dry ice.

[0075] As a result, in the release pipe 20 for releasing the carbon dioxide gas G from the tank 2, the carbon dioxide gas G can be released smoothly while suppressing the generation of dry ice.

[0076] (2) The liquefied carbon dioxide storage facility 1 according to the second aspect is the liquefied carbon dioxide storage facility 1 according to (1), further comprising a connecting member 55 connecting the cover 50 and the discharge pipe 20 .

[0077] Thus, when the pressure in the tank 2 is released by the pressure release device 30 and the cap 50 is detached from the upper end 20t of the discharge pipe 20, the detached cap 50 is maintained connected to the discharge pipe 20 by the connecting member 55. Thus, the cap 50 can be prevented from being scattered or lost.

[0078] (3) The liquefied carbon dioxide storage device 1 of the third scheme is based on the liquefied carbon dioxide storage device 1 of (1) or (2), and the above-mentioned pressure release device 30 is a safety valve that releases the pressure in the above-mentioned tank 2 when the pressure in the above-mentioned tank 2 reaches a predetermined set pressure.

[0079] Thus, when the pressure in the tank 2 is released by the pressure release device 30 serving as a safety valve, the cap 50 is smoothly removed from the release pipe 20 , so that the upper end opening 20 h of the release pipe 20 can be smoothly opened.

[0080] (4) The liquefied carbon dioxide storage device 1 of the fourth scheme is based on any one of the liquefied carbon dioxide storage devices 1 from (1) to (3), wherein the inner peripheral surface 52f of the above-mentioned cover 50, at least in the barrel 52, which faces the outer peripheral surface 20f of the above-mentioned discharge pipe 20, is formed by at least one of a rubber-based material, a synthetic resin-based material, and a wood-based material.

[0081] Thus, even when rainwater or the like enters the gap between the inner peripheral surface 52f of the cylindrical portion 52 of the cap 50 and the outer peripheral surface 20f of the discharge pipe 20, it is possible to suppress the inner peripheral surface 52f of the cap 50 from corroding and rusting. Thus, when the pressure in the tank 2 is released by the pressure release device 30, the cap 50 can be smoothly detached from the upper end 20t of the discharge pipe 20.

[0082] (5) The liquefied carbon dioxide storage device 1 of the fifth scheme is based on any one of the liquefied carbon dioxide storage devices 1 from (1) to (4), and as the pressure in the above-mentioned tank 2 increases, the above-mentioned cylindrical portion 52 slides along the outer peripheral surface 20f of the above-mentioned discharge pipe 20 in the extension direction of the above-mentioned discharge pipe 20, and the above-mentioned cover 50 falls off the above-mentioned discharge pipe 20, thereby opening the upper end opening 20h of the above-mentioned discharge pipe 20.

[0083] Thus, when the pressure in the tank 2 is released by the pressure release device 30, as the pressure in the tank 2 rises, the cylindrical portion 52 slides along the outer peripheral surface 20f of the discharge pipe 20 in the extending direction of the discharge pipe 20, and can be smoothly removed from the discharge pipe 20, so that the upper end opening 20h of the discharge pipe 20 is smoothly opened.

[0084] Industrial Applicability

[0085] According to the liquefied carbon dioxide storage equipment of the present disclosure, in the release pipe for releasing the carbon dioxide gas from the tank, the carbon dioxide gas can be released smoothly while suppressing the generation of dry ice.

[0086] Description of Reference Numerals

[0087] 1…liquefied carbon dioxide storage equipment; 2…tank; 3…cylindrical portion; 4…end plate portion; 11…loading piping; 12…discharge piping; 13…pump; 20…discharge pipe; 20f…outer peripheral surface; 20h…upper end opening; 20t…upper end; 21…connecting portion; 22…upper extension portion; 26…discharge pipe side stopper; 30…pressure release device; 30r…pressure opening portion; 31…connecting pipe; 50, 50B…cap; 51…sealing portion; 52…cylindrical portion; 52f…inner peripheral surface; 55…connecting component; 56…cap side stopper; 59…cover; Dc…center axis direction; Dv…upper and lower directions; G…carbon dioxide gas; L…liquefied carbon dioxide.

Claims

1. A liquefied carbon dioxide storage device, comprising: Tanks capable of storing liquefied carbon dioxide; a pressure release device, provided in the tank and capable of releasing the pressure in the tank; a discharge pipe in the shape of a tube extending upward from the pressure release device; and A cover is provided at the upper end of the discharge pipe, The cover has: a closing portion for closing the upper end opening of the discharge pipe; and The cylindrical portion is in the shape of a cylinder extending downward from the closing portion and is slidably fitted on the outer peripheral surface of the discharge pipe.

2. The liquefied carbon dioxide storage device according to claim 1, wherein: The liquefied carbon dioxide storage facility further includes a connecting member connecting the cover and the discharge pipe.

3. The liquefied carbon dioxide storage device according to claim 1 or 2, wherein: The pressure release device is a safety valve that releases the pressure in the tank when the pressure in the tank reaches a preset set pressure.

4. The liquefied carbon dioxide storage device according to claim 1 or 2, wherein: At least an inner peripheral surface of the cylindrical portion of the cap that faces an outer peripheral surface of the discharge pipe is formed of at least one of a rubber-based material, a synthetic resin-based material, and a wood-based material.

5. The liquefied carbon dioxide storage device according to claim 1 or 2, wherein: As the pressure in the tank increases, the cylindrical portion slides along the outer peripheral surface of the discharge pipe in the extending direction of the discharge pipe, and the cap falls off the discharge pipe, thereby opening the upper end opening of the discharge pipe.

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