Tank facility and floating body

Abstract

To suppress formation of dry ice in a communication pipe and to carry out discharge of carbon dioxide outside a tank well.SOLUTION: A tank facility includes: a tank capable of storing liquefied carbon dioxide; a communication pipe connected to the tank and communicating the inside and outside of the tank; a valve provided in the middle of the communication pipe and provided with a flow path in the communication pipe so as to be freely opened / closed; and a heating unit capable of heating a downstream pipe unit on the downstream side of a valve in a flow direction of carbon dioxide discharged from the tank at least when the valve is opened in the communication pipe from the outside.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a tank installation and a floating body. [Background technology]

[0002] In a ship or the like equipped with a tank for storing liquefied gas, if the pressure inside the tank rises excessively, it is necessary to release the pressure inside the tank to the outside of the tank.For example, Patent Document 1 discloses a configuration in which a communication pipe communicating with the outside of the tank is provided with a safety valve that connects the inside of the tank to the outside of the tank when the pressure inside the tank reaches a specified safety valve operating pressure. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-76210 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, when liquefied carbon dioxide is stored in a tank, the carbon dioxide in the tank may be released from a safety valve or the like into the atmosphere outside the tank. At this time, low-temperature carbon dioxide with reduced pressure flows through the connecting pipe, and if the temperature of the connecting pipe drops sufficiently, the carbon dioxide flowing through the connecting pipe may solidify, producing dry ice in the connecting pipe. If dry ice is produced in the connecting pipe, this may lead to clogging of the connecting pipe, malfunction of the safety valve, and the like.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a tank equipment and a float that can suppress the generation of dry ice in the communicating pipe and effectively release carbon dioxide outside the tank. [Means for solving the problem]

[0006] In order to solve the above problems, the tank equipment according to the present disclosure includes a tank, a communicating pipe, a valve, and a heating unit. The tank is capable of storing liquefied carbon dioxide. The communicating pipe is connected to the tank and communicates the inside of the tank with the outside of the tank. The valve is provided midway through the communicating pipe and is capable of opening and closing a flow path within the communicating pipe. The heating unit is capable of heating, from the outside, at least a downstream pipe section of the communicating pipe that is downstream of the valve in the flow direction of carbon dioxide discharged from the tank when the valve is opened.

[0007] The float according to the present disclosure comprises a float body and the above-mentioned tank equipment provided on the float body.

[0008] The tank equipment according to the present disclosure comprises a tank, a communicating pipe, a valve, and a pressure release unit. The tank is capable of storing liquefied carbon dioxide. The communicating pipe is connected to the tank and communicates the inside of the tank with the outside of the tank. The valve is provided midway through the communicating pipe and is capable of opening and closing a flow path within the communicating pipe. The pressure release unit closes the tip of the communicating pipe and opens the communicating pipe when the pressure within the communicating pipe reaches or exceeds a preset pressure.

[0009] The tank facility according to the present disclosure includes a plurality of tanks, a piping system, a connecting pipe, and a safety valve. The plurality of tanks are capable of storing liquefied carbon dioxide. The piping system is connected to the plurality of tanks. The connecting pipe has one end connected to the piping system and the other end connected to any one of the plurality of tanks. The safety valve is provided midway along the connecting pipe. The safety valve operates when the pressure in the connecting pipe reaches or exceeds a preset safety valve operating pressure. Effect of the Invention

[0010] The tank equipment and float disclosed herein can suppress the generation of dry ice in the communicating pipe and efficiently release carbon dioxide to the outside of the tank. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a side view of a floating body equipped with a tank system according to a first embodiment of the present disclosure. [Diagram 2] FIG. 1 is a diagram showing a configuration of a tank facility according to a first embodiment of the present disclosure. [Diagram 3] FIG. 11 is a diagram showing the configuration of a tank facility according to a second embodiment of the present disclosure. [Figure 4] FIG. 11 is a diagram showing the configuration of a tank facility according to a third embodiment of the present disclosure. [Diagram 5] 5 is a cross-sectional view taken along the line AA in FIG. 4. [Figure 6] FIG. 13 is a diagram showing the configuration of a tank facility according to a fourth embodiment of the present disclosure. [Figure 7] FIG. 13 is a diagram showing the configuration of a tank facility according to a fifth embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] First Embodiment Hereinafter, a tank facility and a floating body according to an embodiment of the present disclosure will be described with reference to Figs. 1 to 7. (Vessel configuration) As shown in Fig. 1, in this embodiment, a ship 1, which is a floating body, transports liquefied carbon dioxide. The ship 1 includes at least a hull 2 ​​as a floating body main body, and a tank facility 10A.

[0013] (Hull configuration) The hull 2 ​​has a pair of side panels 3A, 3B, a ship bottom 6, and an upper deck 5, which form the outer hull of the hull. The side panels 3A, 3B have a pair of side panel shells forming the port and starboard sides, respectively. The ship bottom 6 has a ship bottom panel shell connecting the side panels 3A, 3B. The upper deck 5 illustrated in this embodiment is a full deck exposed to the outside. The hull 2 ​​has a superstructure 7 having an accommodation area formed on the upper deck 5 on the stern 2b side. Note that the position of the superstructure 7 is merely an example, and it may be disposed, for example, on the bow 2a side of the hull 2. A cargo carrying area (hold) 8 is formed inside the hull 2.

[0014] (Tank equipment configuration) The tank equipment 10A is provided in the cargo carrying area 8. In this embodiment, only one set of the tank equipment 10A is provided, but two or more sets of the tank equipment 10A may be provided.

[0015] FIG. 2 is a diagram showing a configuration of a tank facility according to the first embodiment of the present disclosure. As shown in FIG. 2, the tank facility 10A includes at least a tank 11, a communication pipe 15, a valve 20, and a heating unit 30A. In this first embodiment, the tank 11 is disposed in the hull 2. The tank 11 is capable of storing liquefied carbon dioxide. The tank 11 has a tank dome 11d that protrudes above the upper deck 5 in the vertical direction Dv. Here, the shape of the tank 11 is not limited to the shape shown in the drawings. The tank 11 may be, for example, a cylindrical shape extending in the horizontal direction, a spherical shape, a rectangular shape, or the like.

[0016] The communicating pipe 15 communicates the inside of the tank 11 with the outside of the tank 11. One end 15a of the communicating pipe 15 is connected to the tank dome 11d of the tank 11 above the upper deck 5. In this embodiment, the other end 15b of the communicating pipe 15 is connected to the vent post 18. The vent post 18 extends upward from the upper deck 5. The other end 15b of the communicating pipe 15 is connected to the lower part of the vent post 18. When a valve 20 described later is opened, the vent post 18 circulates carbon dioxide from inside the tank 11 from the bottom to the top and releases it into the atmosphere. The other end 15b of the communicating pipe 15 does not have to be connected to the vent post 18.

[0017] The valve 20 is provided in the middle of the communicating pipe 15. The valve 20 is configured to be able to open and close the flow path in the communicating pipe 15. The valve 20 is a so-called safety valve or a pressure relief valve. The valve 20 is normally in a closed state and closes the flow path in the communicating pipe 15. The pressure in the upstream pipe section 15p communicating with the inside of the tank 11 acts on the tank 11 side of the valve 20. When the pressure in the upstream pipe section 15p reaches a preset pressure value, the valve 20 opens and opens the flow path in the communicating pipe 15. When the valve 20 opens, the carbon dioxide in the tank 11 passes through the communicating pipe 15 and is released into the atmosphere via the vent post 18. Here, the carbon dioxide discharged from the tank 11 may be liquefied carbon dioxide, or may be carbon dioxide gas generated by vaporizing the liquefied carbon dioxide in the tank 11.

[0018] (Heating section configuration) The heating unit 30A is configured to be able to externally heat at least a downstream pipe portion 15q of the communication pipe 15 on the other end 15b side with respect to the valve 20. The downstream pipe portion 15q is provided on a side closer to the vent post 18 than the valve 20.

[0019] In this embodiment, the heating unit 30A includes a water supply unit 31 that supplies water to the outer circumferential surface of the downstream pipe portion 15q. The water supply unit 31 includes, for example, a water supply pipe 311 and a plurality of nozzles 312. The water supply pipe 311 supplies water to be supplied to the outside of the downstream pipe portion 15q of the communicating pipe 15 to the plurality of nozzles 312. The water supply pipe 311 in this embodiment extends along the downstream pipe portion 15q. The water supply pipe 311 in this embodiment is arranged at a predetermined interval from the downstream pipe portion 15q and extends parallel to the downstream pipe portion 15q.

[0020] Water is supplied to the water supply pipe 311 from a water supply source. In this embodiment, seawater is supplied to the water supply pipe 311 from a pump 315 that draws up water from the outside of the hull 2 ​​as a water supply source. In this embodiment, for example, the water supply pipe 311 is connected to a pipe 317 for a fire hydrant 316 provided on the upper deck 5. A plurality of fire hydrants 316 are provided on the upper deck 5. The pipe 317 is provided so as to connect the pump 315 to the plurality of fire hydrants 316. An opening / closing valve 314 is provided midway along the water supply pipe 311. By opening the opening / closing valve 314, seawater is supplied to the water supply pipe 311 from the pump 315 via the pipe 317.

[0021] Seawater may be supplied directly from pump 315 to water supply pipe 311 without passing through piping 317 for fire hydrant 316. Seawater or fresh water for other purposes stored in hull 2 ​​may also be supplied to water supply pipe 311. Furthermore, the water supplied through the water supply pipe 311 may be heated by a heat source such as a heater. When the water to be supplied is heated, the temperature may be adjusted based on the temperature, flow rate, etc. of the carbon dioxide released through the communicating pipe 15. Furthermore, the flow rate of the water supplied through the water supply pipe 311 may be adjusted based on the temperature, flow rate, etc. of the carbon dioxide released through the communicating pipe 15.

[0022] The multiple nozzles 312 are provided at intervals in the extension direction of the water supply pipe 311. Each of the multiple nozzles 312 sprays water supplied through the water supply pipe 311 toward the outer circumferential surface of the downstream pipe section 15q. The water sprayed from the multiple nozzles 312 comes into contact with the outer circumferential surface of the downstream pipe section 15q of the communicating pipe 15.

[0023] Here, low-temperature carbon dioxide (liquefied carbon dioxide, carbon dioxide gas) is normally present inside the tank 11 and in the upstream pipe section 15p of the communicating pipe 15, which is disposed closer to the tank 11 than the valve 20 is. For this reason, the tank 11 and the upstream pipe section 15p of the communicating pipe 15 are covered with a heat insulating material or the like. In contrast, low-temperature carbon dioxide is not normally present inside the downstream pipe section 15q of the communicating pipe 15. For this reason, the downstream pipe section 15q is not covered with a heat insulating material or the like and is exposed to the atmosphere. For this reason, the water sprayed from the multiple nozzles 312 directly contacts the outer circumferential surface of the downstream pipe section 15q.

[0024] The temperature of the downstream pipe section 15q of the communicating pipe 15 is usually close to the atmospheric temperature (normal temperature). For example, when the valve 20 is opened and carbon dioxide from the tank 11 flows into the flow path in the downstream pipe section 15q, the temperature of the downstream pipe section 15q drops rapidly. In response to this, the water supply section 31 of the heating section 30A supplies water to the outer circumferential surface of the downstream pipe section 15q, whereby the downstream pipe section 15q is heated from the outer circumferential side, and the drop in temperature of the downstream pipe section 15q is suppressed.

[0025] The supply of water in the water supply unit 31 may be performed, for example, by an operator opening the on-off valve 314 and starting the pump 315. The supply of water in the water supply unit 31 may also be performed, for example, by automatically controlling the operations of the on-off valve 314 and the pump 315 by a control device (not shown). In this case, the control device may open the on-off valve 314 and start the pump 315 using, for example, the opening of the valve 20, the pressure in the upstream pipe portion 15p of the communicating pipe 15 reaching a reference value, or the like as a trigger.

[0026] (Action and effect) In the tank facility 10A and the ship 1 of the first embodiment, at least the downstream pipe section 15q downstream of the valve 20 in the flow direction of carbon dioxide discharged from the tank 11 when the valve 20 is opened is provided with a heating unit 30A capable of heating from the outside the communicating pipe 15. When the valve 20 provided in the communicating pipe 15 is opened, carbon dioxide is discharged from the tank 11 to the outside of the tank 11 through the communicating pipe 15. Here, the carbon dioxide discharged from the tank 11 is liquefied carbon dioxide or carbon dioxide gas generated by vaporizing the liquefied carbon dioxide in the tank 11, and is lower than the atmospheric temperature (room temperature). Therefore, in the communicating pipe 15, the downstream pipe section 15q downstream of the valve 20 is rapidly cooled by the flowing carbon dioxide. At this time, the downstream pipe section 15q is heated from the outside by the heating unit 30A, thereby suppressing the temperature drop of the downstream pipe section 15q. Therefore, the generation of dry ice in the communicating pipe 15 is suppressed, and carbon dioxide can be successfully discharged to the outside of the tank 11.

[0027] In the first embodiment, the heating section 30A includes a water supply section 31. As a result, the water supply section 31 supplies water having a higher temperature than the carbon dioxide flowing through the downstream pipe section 15q to the outer circumferential surface of the downstream pipe section 15q, thereby suppressing a decrease in the temperature of the downstream pipe section 15q.

[0028] In the first embodiment, water is sprayed from the multiple nozzles 312 toward the outer circumferential surface of the downstream pipe portion 15q. However, water may be supplied to the downstream pipe portion 15q by, for example, sprinkling water from a hose.

[0029] In the first embodiment, the downstream pipe section 15q of the communicating pipe 15 is heated by supplying water to the downstream pipe section 15q by the water supply section 31, but this is not limited to the above. The water supply section 31 may supply water not only to the downstream pipe section 15q but also to the upstream pipe section 15p. However, as described above, if the upstream pipe section 15p is covered with a heat insulating material or the like, it is necessary to consider damage to the heat insulating material due to the supply of water.

[0030] Second Embodiment Next, a second embodiment of the tank equipment and the float according to the present disclosure will be described. In the second embodiment described below, only the configuration of the heating unit of the tank equipment is different from that of the first embodiment, so that the same parts as those in the first embodiment are denoted by the same reference numerals and will not be described again. FIG. 3 is a diagram showing a configuration of a tank facility according to a second embodiment of the present disclosure. As shown in Figure 3, in the tank equipment 10B installed on the ship 1 of this embodiment, the heating section 30B is configured to be able to heat at least the downstream pipe section 15q of the communicating pipe 15 on the other end 15b side relative to the valve 20 from the outside.

[0031] In the second embodiment, the heating section 30B includes a heater section 33 provided along the outer circumferential surface of the downstream pipe section 15q. The heater section 33 heats the downstream pipe section 15q from the outside. As such a heater section 33, for example, a so-called heat trace using hot water or steam, an electric heater, or the like can be used. The heater section 33 is provided so as to heat at least the outer peripheral surface of the downstream pipe section 15q. The heater section 33 may be provided so as to heat the valve 20 and the upstream pipe section 15p in addition to the downstream pipe section 15q. In the second embodiment, since the heater section 33 is provided as the heating section 30B, the downstream pipe section 15q and the heater section 33 may be covered with a heat insulating material or the like.

[0032] (Action and effect) In the tank facility 10B and the ship 1 of the second embodiment, as in the first embodiment, the downstream pipe section 15q is heated from the outside by the heating section 30B, thereby suppressing a decrease in temperature of the downstream pipe section 15q. Therefore, the generation of dry ice in the communication pipe 15 can be suppressed, and carbon dioxide can be released to the outside of the tank 11 well.

[0033] In the second embodiment, the heating section 30B includes the heater section 33. With this, the heater section 33 heats the outer peripheral surface of the downstream pipe section 15q, thereby suppressing a decrease in temperature of the downstream pipe section 15q due to the flow of carbon dioxide.

[0034] <Third embodiment> Next, a third embodiment of the tank equipment and the float according to the present disclosure will be described. In the third embodiment described below, only the configuration of the heating unit of the tank equipment is different from the first and second embodiments, so the same parts as those in the first and second embodiments are denoted by the same reference numerals and will not be described again. FIG. 4 is a diagram showing a configuration of a tank facility according to a third embodiment of the present disclosure. As shown in FIG. 4, in a tank facility 10C provided on a ship 1 of the third embodiment, the communication pipe 15 is not connected to a vent post 18 as in the first and second embodiments. In the third embodiment, the tip 15s of the communication pipe 15 is provided so as to open toward the outside of the hull 2. As in the first embodiment, the communication pipe 15 is provided with a heating section 30A (see FIG. 2; not shown in FIG. 4). The communication pipe 15 may also be provided with a heating section 30B similar to the second embodiment.

[0035] A nozzle 40 is detachably attached to the tip 15s of the communicating pipe 15. The nozzle 40 is a Jettison nozzle, and is attached to the tip 15s of the communicating pipe 15 when carbon dioxide (for example, liquefied carbon dioxide) in the tank 11 is to be urgently released. By attaching this nozzle 40 to the tip 15s of the communicating pipe 15, the carbon dioxide released through the communicating pipe 15 is ejected far outside the hull 2, thereby preventing the adhesion of low-temperature carbon dioxide to the ship 1.

[0036] FIG. 5 is a cross-sectional view taken along line AA in FIG. 4 and 5, in the third embodiment, a nozzle 40 integrally includes a nozzle body 41 and a plurality of fins 42. The nozzle body 41 is detachably attached to the tip portion 15s of the communicating tube 15. The nozzle body 41 is cylindrical and has therein a nozzle flow path 41r through which carbon dioxide discharged from the tip portion 15s of the communicating tube 15 flows.

[0037] 5, a plurality of fins 42 are provided on the outer peripheral surface of the nozzle body 41. The plurality of fins 42 are provided, for example, at intervals in the circumferential direction centered on the nozzle body 41. Each fin 42 extends so as to protrude from the outer peripheral surface of the nozzle body 41 to the outside in the radial direction of the nozzle body 41. Note that there is no limitation on the shape, number, etc. of the fins 42, and configurations other than those shown in the drawings can be appropriately adopted.

[0038] (Action and effect) In the tank facility 10C and the ship 1 of the third embodiment, as in the first embodiment, the downstream pipe section 15q is heated from the outside by the heating section 30A, thereby suppressing a decrease in temperature of the downstream pipe section 15q. Therefore, the generation of dry ice in the communication pipe 15 can be suppressed, and carbon dioxide can be released to the outside of the tank 11 well.

[0039] In the third embodiment, the nozzle 40 detachably attached to the tip 15s of the communicating pipe 15 is provided with fins 42 on the outer peripheral surface of the nozzle body 41. Carbon dioxide discharged from the tank 11 passes through the communicating pipe 15 and is discharged to the outside through the nozzle body 41 provided at the tip 15s. At this time, the nozzle body 41 is rapidly cooled by the flowing carbon dioxide. In contrast, the fins 42 provided on the outer peripheral surface of the nozzle body 41 can efficiently exchange heat with the atmosphere to heat the fins 42 and the nozzle body 41, so that the temperature drop of the fins 42 and the nozzle body 41 is suppressed. Therefore, the generation of dry ice in the nozzle body 41 is suppressed, and carbon dioxide can be successfully discharged to the outside through the nozzle 40.

[0040] <Fourth embodiment> Next, a fourth embodiment of the tank equipment and the float according to the present disclosure will be described. In the fourth embodiment described below, only the configuration of the tank equipment is different from the first to third embodiments, so the same parts as those in the first to third embodiments are denoted by the same reference numerals and will not be described again. FIG. 6 is a diagram showing a configuration of a tank facility according to a fourth embodiment of the present disclosure. As shown in FIG. 6, in a tank facility 10D provided on a ship 1 according to the fourth embodiment, the communicating pipe 15 is not connected to a vent post 18 either. The communication pipe 15 may be provided with a heating section 30A (see FIG. 2) similar to the first embodiment. The communication pipe 15 may be provided with a heating section 30B (see FIG. 3) similar to the second embodiment.

[0041] In the fourth embodiment, a pressure release section 50 is provided at the tip 15s of the communicating pipe 15. The pressure release section 50 closes the tip 15s of the communicating pipe 15, and releases the inside of the communicating pipe 15 when the pressure inside the communicating pipe 15 becomes equal to or higher than a preset pressure. For example, a rupture disk (burst plate) can be used as such a pressure release section 50. For example, a safety valve can be used as the pressure release section 50. In the fourth embodiment, the set pressure of the pressure release section 50 is set to equal to or higher than the triple point pressure of carbon dioxide.

[0042] (Action and effect) In the tank facility 10D and the ship 1 of the fourth embodiment, the tip 15s of the communicating pipe 15 is closed by the pressure release part 50. As a result, when the valve 20 provided in the communicating pipe 15 opens and carbon dioxide from the tank 11 flows into the downstream pipe part 15q downstream of the valve 20 in the communicating pipe 15, the downstream pipe part 15q is initially closed by the pressure release part 50. Therefore, the pressure in the downstream pipe part 15q of the communicating pipe 15 gradually increases. When the pressure of carbon dioxide in the communicating pipe 15 increases, dry ice is less likely to be generated in the communicating pipe 15. Even if dry ice is generated in the downstream pipe part 15q immediately after the valve 20 opens, the pressure in the downstream pipe part 15q increases thereafter, causing the generated dry ice to evaporate or liquefy. When the pressure inside the communicating pipe 15 reaches or exceeds the set pressure, the pressure release section 50 opens the communicating pipe 15, thereby allowing carbon dioxide to be released outside the tank 11 under conditions that make it difficult for dry ice to be generated inside the communicating pipe 15.

[0043] In the fourth embodiment, the set pressure of the pressure release section 50 is set to be equal to or higher than the triple point pressure of carbon dioxide. As a result, the pressure of carbon dioxide in the communicating pipe 15 is equal to or higher than the triple point pressure immediately before the pressure release section 50 is opened. As a result, when the pressure release section 50 opens the communicating pipe 15, carbon dioxide can be released to the outside of the tank 11 without dry ice being generated in the communicating pipe 15.

[0044] <Fifth embodiment> Next, a fifth embodiment of the tank equipment and the float according to the present disclosure will be described. In the fifth embodiment described below, only the configuration of the tank equipment is different from the first to fourth embodiments, so the same parts as those in the first to fourth embodiments are denoted by the same reference numerals and will not be described again. (Vessel configuration) FIG. 7 is a diagram showing a configuration of a tank facility according to a fifth embodiment of the present disclosure. As shown in FIG. 7, in the fifth embodiment, a ship 1, which is a floating body, is provided with a tank facility 10E.

[0045] As shown in FIG. 2, the tank facility 10E includes a plurality of tanks 11, a piping system 60, and a connecting pipe . In the fifth embodiment, for example, four tanks 11 are provided. Each of the tanks 11 includes a communication pipe 15 and a heating unit 30A or 30B having the configurations as shown in the first and second embodiments. Each of the tanks 11 may also include a nozzle 40 and a pressure release unit 50 as shown in the third and fourth embodiments.

[0046] The piping system 60 is connected to the multiple tanks 11. The piping system 60 is used, for example, for loading liquefied carbon dioxide into each tank 11, unloading liquefied carbon dioxide from each tank 11, etc. The piping system 60 has, for example, a main pipe 61 extending from a pipe connection part (not shown) to which a pipe from outside the ship can be connected, and multiple branch pipes 62 branching off and extending from the main pipe 61. Each of the multiple branch pipes 62 is connected to the multiple tanks 11. In addition, the main pipe 61 is provided with an on-off valve 61v. Each of the multiple branch pipes 62 is provided with an on-off valve 62v. When loading liquefied carbon dioxide into each tank 11 and unloading liquefied carbon dioxide from each tank 11, the piping system 60 appropriately opens and closes the on-off valves 61v and 62v.

[0047] One end 70a of the connecting pipe 70 is connected to the piping system 60. The other end 70b of the connecting pipe 70 is connected to one of the multiple tanks 11. In this fifth embodiment, a case where the connecting pipe 70 is connected to one tank 11A among the four tanks 11 is illustrated.

[0048] A safety valve 75 is provided in the middle of the connecting pipe 70. The safety valve 75 operates when the pressure in the piping system 60, more specifically, the pressure in the connecting pipe 70 near the one end 70a communicating with the piping system 60, exceeds a preset safety valve operating pressure. For example, when the on-off valves 61v and 62v are closed and the inside of the piping system 60 is closed, if the temperature of the carbon dioxide present in the piping system 60 rises due to heat input from the outside, the pressure in the piping system 60 may increase due to the expansion of the carbon dioxide. As a result, when the safety valve 75 opens, the carbon dioxide in the piping system 60 flows into the tank 11A through the connecting pipe 70. The tank 11A is pressure-managed so that liquefied carbon dioxide can be stored therein. That is, the pressure in the tank 11A is managed so that it is equal to or higher than the triple point pressure. Therefore, the carbon dioxide flowing into the tank 11A through the connecting pipe 70 is equal to or higher than the triple point pressure, and the generation of dry ice is suppressed.

[0049] (Action and effect) In the tank facility 10E and ship 1 of the fifth embodiment, when the pressure of carbon dioxide rises in a piping system 60 connected to a plurality of tanks 11, the carbon dioxide pressure acts on a safety valve 75 through a connecting pipe 70 having one end 70a connected to the piping system 60. When the pressure in the connecting pipe 70 reaches or exceeds the safety valve operating pressure and the safety valve 75 operates, carbon dioxide from the piping system 60 flows through the connecting pipe 70 into the tank 11 to which the other end 70b of the connecting pipe 70 is connected. Since pressure management is performed in the tank 11 so that liquefied carbon dioxide can be stored, the generation of dry ice from the carbon dioxide in the connecting pipe 70 can be suppressed.

[0050] (Other embodiments) Although the embodiments of the present disclosure have been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes and the like that do not depart from the gist of the present disclosure are also included. In the above-described embodiments, the ship 1 is exemplified as a floating body, but the present invention is not limited to this. The floating body may be an offshore floating facility that does not include a propulsion mechanism.

[0051] <Additional Notes> The tank equipment 10A and the floating body 1 described in each embodiment can be understood, for example, as follows.

[0052] (1) The tank equipment 10A of the first aspect comprises a tank 11 capable of storing liquefied carbon dioxide, a communicating pipe 15 connected to the tank 11 and communicating between the inside of the tank 11 and the outside of the tank 11, a valve 20 provided midway through the communicating pipe 15 and capable of opening and closing a flow path within the communicating pipe 15, and a heating unit 30A capable of heating from the outside at least a downstream pipe section 15q of the communicating pipe 15 that is downstream of the valve 20 in the flow direction of carbon dioxide discharged from the tank 11 when the valve 20 is opened.

[0053] The carbon dioxide discharged from the tank 11 is liquefied carbon dioxide or carbon dioxide gas generated by vaporizing the liquefied carbon dioxide inside the tank 11, and is lower than the temperature in the atmosphere (room temperature). Therefore, in the communicating pipe 15, the downstream pipe section 15q downstream of the valve 20 is rapidly cooled by the flowing carbon dioxide. At this time, the downstream sensing section is heated from the outside by the heating section 30A, thereby suppressing the temperature drop of the downstream pipe section 15q. Therefore, the generation of dry ice inside the communicating pipe 15 is suppressed, and the carbon dioxide can be released to the outside of the tank 11 well.

[0054] (2) A tank facility 10A according to a second aspect is the tank facility 10A of (1), in which the heating section 30A includes a water supply section 31 that supplies water to the outer circumferential surface of the downstream pipe section 15q.

[0055] This allows the water supply section 31 to supply water having a higher temperature than the carbon dioxide flowing inside the downstream pipe section 15q to the outer circumferential surface of the downstream pipe section 15q, thereby suppressing a decrease in temperature of the downstream pipe section 15q.

[0056] (3) A tank facility 10B according to a third aspect is the tank facility 10B of (1), in which the heating section 30B includes a heater section 33 provided along an outer circumferential surface of the downstream pipe section 15q.

[0057] This allows the heater section 33 to heat the outer peripheral surface of the downstream pipe section 15q, and suppresses a decrease in temperature of the downstream pipe section 15q due to the flow of carbon dioxide.

[0058] (4) The tank equipment 10C according to a fourth aspect is any one of the tank equipment 10C of (1) to (3), and further includes a nozzle 40 that is detachable from the tip 15s of the communicating pipe 15, and the nozzle 40 includes a nozzle body 41 having a nozzle flow path 41r through which carbon dioxide discharged from the tip 15s of the communicating pipe 15 flows, and a fin 42 that protrudes radially outward from the outer peripheral surface of the nozzle body 41.

[0059] The nozzle body 41 is rapidly cooled by the flowing carbon dioxide. The fins 42 provided on the outer peripheral surface of the nozzle body 41 allow efficient heat exchange with the atmosphere to heat the fins 42 and the nozzle body 41, so that a drop in temperature of the fins 42 and the nozzle body 41 is suppressed. Therefore, the generation of dry ice in the nozzle body 41 is suppressed, and carbon dioxide can be efficiently released to the outside through the nozzle 40.

[0060] (5) The tank equipment 10D according to a fifth aspect is the tank equipment 10D of (1), further including a pressure release section 50 that blocks the tip 15s of the communicating pipe 15 and opens the inside of the communicating pipe 15 when the pressure inside the communicating pipe 15 becomes equal to or greater than a predetermined set pressure.

[0061] As a result, valve 20 provided in communicating pipe 15 opens, and when carbon dioxide from tank 11 flows into downstream pipe section 15q downstream of valve 20 in communicating pipe 15, the pressure in downstream pipe section 15q of communicating pipe 15 increases. When the pressure of carbon dioxide in communicating pipe 15 increases, dry ice becomes less likely to be generated in communicating pipe 15. Therefore, when the pressure in communicating pipe 15 reaches or exceeds a set pressure, pressure release section 50 opens communicating pipe 15, allowing carbon dioxide to be released to the outside of tank 11 under conditions in which dry ice is less likely to be generated in communicating pipe 15.

[0062] (6) A tank facility 10D according to a sixth aspect is the tank facility 10D of (5), wherein the set pressure is set to be equal to or higher than the triple point pressure of carbon dioxide.

[0063] As a result, just before the pressure release section 50 is opened, the pressure of carbon dioxide in the communicating pipe 15 becomes equal to or higher than the triple point pressure. Therefore, when the pressure release section 50 opens the inside of the communicating pipe 15, the carbon dioxide can be released to the outside of the tank 11 without dry ice being generated in the communicating pipe 15.

[0064] (7) The tank equipment 10E relating to the seventh aspect is any one of the tank equipment 10E of (1) to (6), and further comprises a piping system 60 having a plurality of the tanks 11 and connected to the plurality of the tanks 11, a connecting pipe 70 having one end 70a connected to the piping system 60 and the other end 70b connected to any one of the plurality of the tanks 11, and a safety valve 75 provided midway along the connecting pipe 70 and operable when the pressure in the connecting pipe 70 reaches or exceeds a predetermined safety valve operating pressure.

[0065] As a result, when the pressure of carbon dioxide rises in the piping system 60 connected to the multiple tanks 11, the carbon dioxide pressure acts on the safety valve 75 through the connecting pipe 70, one end 70a of which is connected to the piping system 60. When the pressure in the connecting pipe 70 reaches or exceeds the safety valve activation pressure and the safety valve 75 activates, carbon dioxide from the piping system 60 flows through the connecting pipe 70 into the tank 11 to which the other end 70b of the connecting pipe 70 is connected. Since the pressure inside the tank 11 is managed so that liquefied carbon dioxide can be stored, the generation of dry ice from the carbon dioxide in the connecting pipe 70 can be suppressed.

[0066] (8) A float 1 according to an eighth aspect includes a float body 2 and a tank facility 10A selected from any one of (1) to (7) provided on the float body 2. Examples of the floating body 1 include a ship and an offshore floating facility. Examples of the floating body main body 2 include a ship hull 2 ​​and a floating body main body of the offshore floating facility.

[0067] This makes it possible to provide a floating body 1 equipped with a tank facility 10A that can suppress the generation of dry ice in the communicating pipe 15 and efficiently release carbon dioxide to the outside of the tank 11.

[0068] (9) The tank equipment 10D of the ninth aspect comprises a tank 11 capable of storing liquefied carbon dioxide, a communicating pipe 15 connected to the tank 11 and communicating between the inside of the tank 11 and the outside of the tank 11, a valve 20 provided midway through the communicating pipe 15 and capable of opening and closing a flow path within the communicating pipe 15, and a pressure release section 50 that blocks a tip 15s of the communicating pipe 15 and releases the inside of the communicating pipe 15 when the pressure within the communicating pipe 15 becomes equal to or higher than a predetermined set pressure.

[0069] As a result, valve 20 provided in communicating pipe 15 opens, and when carbon dioxide from tank 11 flows into communicating pipe 15, the pressure in communicating pipe 15 increases. When the pressure of carbon dioxide in communicating pipe 15 increases, dry ice is less likely to be generated in communicating pipe 15. In this way, when the pressure in communicating pipe 15 reaches or exceeds a set pressure, pressure release section 50 opens communicating pipe 15, so that carbon dioxide can be released to the outside of tank 11 under conditions in which dry ice is less likely to be generated in communicating pipe 15. Therefore, the generation of dry ice in communicating pipe 15 is suppressed, and carbon dioxide can be released to the outside of tank 11 well.

[0070] (10) The tank equipment 10E according to the tenth aspect comprises a plurality of tanks 11 capable of storing liquefied carbon dioxide, a piping system 60 connected to the plurality of tanks 11, a connecting pipe 70 having one end 70a connected to the piping system 60 and the other end 70b connected to any one of the plurality of tanks 11, and a safety valve 75 provided midway along the connecting pipe 70 and operable when the pressure in the connecting pipe 70 reaches or exceeds a predetermined safety valve operating pressure.

[0071] As a result, when the pressure inside the connecting pipe 70 reaches or exceeds the safety valve operating pressure and the safety valve 75 operates, carbon dioxide from the piping system 60 flows through the connecting pipe 70 into the tank 11 to which the other end 70b of the connecting pipe 70 is connected. Since the pressure inside the tank 11 is controlled so that liquefied carbon dioxide can be stored, the generation of dry ice from the carbon dioxide inside the connecting pipe 70 can be suppressed. [Explanation of symbols]

[0072] 1... Ship (floating body) 2... Hull (floating body main body) 2a... Bow 2b... Stern 3A, 3B... Ship side 5... Upper deck 6... Ship bottom 7... Superstructure 8... Cargo carrying area 10A-10E... Tank equipment 11, 11A... Tank 15... Connecting pipe 15a... One end 15b... Other end 15p... Upstream pipe section 15q...downstream pipe section 15s...tip section 18...vent post 20...valve 30A, 30B...heating section 31...water supply section 33...heater section 40...nozzle 41...nozzle body 41r...nozzle flow path 42...fin 50...pressure relief section 60...piping system 61...main pipe 61v...on-off valve 62...branch pipe 62v...on-off valve 70...connecting pipe 70a...one end 70b...other end 75...safety valve 311...water supply pipe 312...nozzle 314...on-off valve 315...pump 316...fire hydrant 317...piping

Claims

1. a plurality of tanks capable of storing liquefied carbon dioxide; a communication pipe connected to the tank and communicating between the inside of the tank and the outside of the tank; a valve provided midway through the communication pipe so as to be able to open and close a flow path within the communication pipe; a heating unit capable of externally heating at least a downstream pipe portion of the communicating pipe that is downstream of the valve in a flow direction of carbon dioxide discharged from the tank when the valve is opened; a piping system connected to a plurality of the tanks; a connecting pipe having one end connected to the piping system and the other end connected to any one of the plurality of tanks; a safety valve that is provided in the middle of the connecting pipe and that operates when the pressure in the connecting pipe reaches or exceeds a preset safety valve operating pressure; Tank facilities equipped with:

2. The heating section includes a water supply section that supplies water to the outer peripheral surface of the downstream pipe section.

2. The tank installation according to claim 1.

3. The heating section includes a heater section provided along the outer circumferential surface of the downstream pipe section.

2. The tank installation according to claim 1.

4. a detachable nozzle is further provided at the tip of the communication pipe; The nozzle is a nozzle body having a nozzle flow path through which carbon dioxide discharged from the tip of the communication pipe flows; fins protruding radially outward from the outer circumferential surface of the nozzle body; The tank facility according to claim 2 or 3.

5. a pressure release section that closes the tip of the communicating pipe and releases the inside of the communicating pipe when the pressure inside the communicating pipe reaches or exceeds a preset pressure.

2. The tank installation according to claim 1.

6. The set pressure is set to be equal to or higher than the triple point pressure of carbon dioxide. The tank facility according to claim 5.

7. A floating body; The tank facility according to claim 1, which is provided on the floating body; A floating body comprising:

8. a plurality of tanks capable of storing liquefied carbon dioxide; a piping system connected to a plurality of the tanks; a connecting pipe having one end connected to the piping system and the other end connected to any one of the plurality of tanks; a safety valve that is provided in the middle of the connecting pipe and that operates when the pressure in the connecting pipe reaches or exceeds a preset safety valve operating pressure; Tank facilities equipped with:

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