KR20230071179A - floating body - Google Patents

Abstract

The floating body includes a tank capable of selectively storing liquefied carbon dioxide and liquefied gas other than liquefied carbon dioxide, a first safety valve that releases gas in the tank to the outside of the tank when the first pilot valve operates, and a first pilot valve. It is disposed spaced apart from the first pressure inlet line for transmitting the pressure in the tank, the second safety valve for sending the gas in the tank to the outside of the tank when the second pilot valve operates, and the second safety valve, and disposes the gas to the outside. A vent riser for discharging to the vent riser, a connecting pipe for guiding the gas sent from the second safety valve to the vent riser, a second pressure inlet line for transmitting the pressure in the tank to the second pilot valve, and a destination for transmitting the pressure in the tank A switching valve that selectively switches between the first pilot valve and the second pilot valve is provided.

Description

floating body

This disclosure relates to floating bodies.

This application claims priority based on Japanese Patent Application No. 2020-188463 for which it applied to Japan on November 12, 2020, and uses the content here.

In Patent Literature 1, a configuration in which a tank of an existing gas transport ship is used for both transport of liquefied petroleum gas (LPG) and transport of liquefied carbon dioxide, and a configuration that is used for both transport of liquefied ammonia gas and transport of liquefied carbon dioxide is provided. Each is disclosed.

Patent Document 1: Japanese Unexamined Patent Publication No. 2004-125039

The tank structured as described above is provided with a safety valve for releasing the pressure in the tank to the outside of the tank when the pressure in the tank exceeds the design pressure.

BACKGROUND ART When liquefied gas having flammability such as liquefied petroleum gas is stored in a tank, a safety valve is connected to a vent riser through a pipe. When the safety valve is opened and the gas liquefied gas in the tank is released, the gas liquefied gas is guided from the safety valve to the vent riser through a pipe without being directly discharged to the atmosphere from the discharge port of the safety valve. Then, the gaseous liquefied gas is discharged into the atmosphere from the outlet of the vent riser disposed at a high place.

On the other hand, when the liquefied carbon dioxide is accommodated in the tank, the safety valve is opened and the gaseous carbon dioxide in which the liquefied carbon dioxide is vaporized is discharged out of the tank. Since the outside of the tank is at atmospheric pressure, a pressure drop of carbon dioxide occurs, and there is a possibility that carbon dioxide is solidified and dry ice is generated by this pressure drop. And, if the pipe up to the vent riser is connected to the outlet of the safety valve, there is a possibility that the inside of the pipe is blocked by the generated dry ice.

That is, when operating a tank in which both liquefied carbon dioxide and liquefied gas other than liquefied carbon dioxide can be selected as the contained matter, a safety valve for liquefied carbon dioxide and a safety valve for liquefied gas are respectively provided, Accordingly, it is necessary to switch the emission source.

However, since there is a possibility of trouble such as blockage in the pipe if the discharge destination of the stored objects is wrong, it is necessary to pay close attention when switching the discharge destination of the stored objects, which increases the burden on the operator.

This indication was made in order to solve the said subject, and the object of this indication is to provide the floating body which can switch the discharge destination of the tank contents discharge|released from a safety valve easily and safely.

In order to solve the above problems, the floating body according to the present disclosure includes a floating body, a tank, a first safety valve, a first pressure introduction line, a second safety valve, a vent riser, a connecting pipe, and a second A pressure introduction line and a switching valve are provided. The tank is disposed on the floating body body. The tank can selectively store liquefied carbon dioxide and liquefied gases other than liquefied carbon dioxide. The first safety valve includes a first pilot valve that operates when the pressure in the tank reaches a predetermined set pressure. The first safety valve discharges the gas in the tank to the outside of the tank when the first pilot valve operates. The first pressure introduction line transmits the pressure in the tank to the first pilot valve. The second safety valve includes a second pilot valve that operates when the pressure in the tank reaches a predetermined set pressure. The second safety valve sends the gas in the tank to the outside of the tank when the second pilot valve operates. The vent riser is disposed apart from the second safety valve. The vent riser discharges the gas to the outside. The connection pipe connects the second safety valve and the vent riser. The connection pipe guides the gas delivered from the second safety valve to the vent riser. The second pressure introduction line transmits the pressure in the tank to the second pilot valve. The switching valve selectively switches a transfer destination of the pressure in the tank between the first pilot valve and the second pilot valve.

A floating body according to the present disclosure includes a floating body body, a tank, a safety valve, a vent riser, and a connecting pipe. The tank is disposed on the floating body body. The tank can selectively store liquefied carbon dioxide and liquefied gases other than liquefied carbon dioxide. The safety valve releases the gas in the tank to the outside of the tank when the pressure in the tank reaches a predetermined set pressure. The vent riser is disposed apart from the safety valve. The vent riser discharges the gas to the outside. The connection pipe connects the safety valve and the vent riser. The connection pipe includes a detachable tube and a connection tube main body. The detachable pipe constitutes a part of the connecting pipe in the direction in which the connecting pipe extends. The connecting pipe main body constitutes the rest of the connecting pipe. The detachable pipe is configured to be detachable from the connecting pipe main body.

According to the floating body of the present disclosure, it is possible to easily and safely switch the discharge destination of the tank contents discharged from the safety valve.

1 is a plan view showing a schematic configuration of a ship as a floating body according to an embodiment of the present disclosure.
FIG. 2 is a view showing a tank and a safety valve system provided in a ship according to an embodiment of the present disclosure, and is a cross-sectional view seen in the direction of arrow II-II in FIG. 1 .
3 is a cross-sectional view showing schematic configurations of a first safety valve and a second safety valve of the safety valve system according to the first embodiment of the present disclosure.
4 is a diagram showing a state in which liquefied carbon dioxide is stored in a tank in the safety valve system according to the first embodiment of the present disclosure.
5 is a diagram showing a state in which liquefied gas is stored in a tank in the safety valve system according to the first embodiment of the present disclosure.
6 is a diagram showing a state in which liquefied gas is stored in a tank in a safety valve system according to a modified example of the first embodiment of the present disclosure.
7 is a diagram showing a state in which liquefied carbon dioxide is stored in a tank in a safety valve system according to a modification of the first embodiment of the present disclosure.
8 is a diagram showing a state in which liquefied gas is stored in a tank in the safety valve system according to the second embodiment of the present disclosure.
9 is a diagram showing a state in which liquefied carbon dioxide is stored in a tank in the safety valve system according to the second embodiment of the present disclosure.

<First Embodiment>

Hereinafter, a floating body according to an embodiment of the present disclosure will be described with reference to FIGS. 1 to 9 .

(Configuration of vessel)

As shown in FIG. 1, in this embodiment, ship 1A as a floating body is equipped with the ship body 2 as a floating body main body, and the tank installation 10 at least.

(hull configuration)

The hull 2 has a pair of sheer sides 3A and 3B, a ship bottom (not shown), and an upper deck 5, which constitute the outer shell. The wing sides 3A and 3B each have a pair of wing side shell plates forming left and right wing sides, respectively. The ship bottom (not shown) has a ship bottom shell plate connecting these side sides 3A and 3B. By these pair of side surfaces 3A and 3B and a ship bottom (not shown), the outer shell of the hull 2 forms a U-shape in a cross section orthogonal to the fore and aft direction Da. The upper deck 5 illustrated in this embodiment is a traditional deck exposed to the outside. In the hull 2, on the upper deck 5 on the side of the stern 2b, an upper structure 7 having a living space is formed. In addition, the position of the upper structure 7 is only an example, and you may arrange|position it on the bow 2a side of ship body 2, for example.

Inside the hull 2, a cargo loading compartment (hold) 8 is formed.

On the upper deck 5 of the hull 2, a vent riser 9 described later is arranged. Note that the arrangement of the vent riser 9 is only an example, and safety valve connection pipes of a plurality of tanks 11 may be connected to one vent riser 9 .

(Configuration of tank facilities)

A plurality of tank installations 10 are arranged in the load loading compartment 8 along the fore and aft direction Da. In this embodiment, two tank installations 10 are arranged at intervals in the fore and aft direction Da.

As shown in FIG. 2 , the tank facility 10 includes at least a tank 11, a loading pipe 13, an unloading pipe 14, and a safety valve system 20A.

In this embodiment, the tank 11 is disposed on the hull 2. The tank 11 has a cylindrical shape extending in the horizontal direction, for example. In addition, the tank 11 is not limited to a cylindrical shape, and the tank 11 may be spherical or rectangular.

The tank 11 can selectively store liquefied carbon dioxide L1 and liquefied gas L2 other than liquefied carbon dioxide L1 in its inside. As liquefied gas (L2) other than liquefied carbon dioxide (L1), liquefied petroleum gas (LPG), liquefied natural gas (LNG), ammonia etc. are mentioned, for example. In the following description, the liquefied carbon dioxide L1 and the liquefied gas L2 stored in the tank 11 are described except for the case where it is necessary to distinguish between the liquefied carbon dioxide L1 and the liquefied gas L2. , sometimes simply referred to as the stored gas (L).

The loading pipe 13 loads stored gas L supplied from facilities on land or the like into the tank 11 . The loading pipe 13 penetrates the top of the tank 11 from the outside of the tank 11 and extends into the inside of the tank 11 . The front end of the loading pipe 13 is open within the tank 11 .

The unloading pipe 14 sends the stored gas L in the tank 11 outboard. The discharge pipe 14 penetrates the top of the tank 11 from the outside of the tank 11 and extends into the inside of the tank 11 . A pump (not shown) is provided at the front end of the unloading pipe 14 . The pump sucks the stored gas L in the tank 11 . The unloading pipe 14 sends the stored gas L sucked by the pump to the outside of the tank 11 (outboard).

(Configuration of safety valve system)

The safety valve system 20A includes a first safety valve 21, a second safety valve 31, a connection pipe 45, a vent riser 9, a first pressure introduction line 41, It is mainly equipped with the 2nd pressure introduction line 42 and the switching valve 43.

The first safety valve 21 is disposed at the top of the tank 11 . The first safety valve 21 is configured to function when liquefied carbon dioxide L1 is stored in the tank 11 . The 1st safety valve 21 releases the pressure in the tank 11, when the pressure of the gaseous phase (gas) in the tank 11 reaches a predetermined set pressure. As shown in FIG. 3 , the first safety valve 21 is a so-called pilot type, and includes a main valve 22 and a first pilot valve 23 .

The main valve 22 is disposed in the main valve box 24 . In the main valve box 24, an inlet 24a and an outlet 24b are formed. The inlet 24a communicates with the inside of the tank 11 . The discharge port 24b is open toward the outside of the tank 11 . That is, the discharge port 24b is open to the atmosphere. The main valve 22 is configured to be disconnectable from the inlet port 24a. When the main valve 22 closes the inlet 24a, the first safety valve 21 is closed. The pressure in the tank 11 acts on the main valve 22 from the inlet 24a side. The main valve box 24 has a back pressure chamber 24d on the side opposite to the inlet 24a side of the main valve 22 .

The first pilot valve 23 applies a pilot pressure for biasing the main valve 22 in the closing direction. The first pilot valve 23 includes a normal cylinder 25, a valve body 26, and a biasing member 27.

The valve element 26 is disposed so that reciprocating movement is possible within the cylinder 25 . The biasing member 27 is disposed on one side of the direction in which it reciprocates with respect to the valve body 26 . The biasing member 27 biases the valve body 26 to the other side within the cylinder 25 . Inside the cylinder 25, a pressure introduction chamber 25s is formed on the other side of the valve body 26 (the side opposite to the biasing member 27). The pressure in the tank 11 is transmitted to the pressure inlet chamber 25s via a first pressure inlet line 41 described later. In other words, the pressure inlet chamber 25s can communicate with the inside of the tank 11 through the first pressure inlet line 41, and when communicating with the inside of the tank 11, the inside and the tank 11 It is structured so that the gaseous phase in it may become the same pressure. The pressure inlet chamber 25s and the back pressure chamber 24d of the main valve box 24 are communicated and connected via a communication line 28 .

The valve body 26 of the first pilot valve 23 is normally biased toward the pressure introduction chamber 25s by the biasing member 27 . When the pressure in the tank 11 rises, the pressure in the pressure introduction chamber 25s also rises accordingly. Then, when the pressure in the pressure introduction chamber 25s exceeds the biasing force of the biasing member 27, the valve body 26 resists the biasing force of the biasing member 27 and moves within the cylinder 25. And when the pressure in the pressure introduction chamber 25s reaches a predetermined set pressure, the inside of the pressure introduction chamber 25s is released to the atmosphere, for example, and the pressure in the pressure introduction chamber 25s decreases. The pressure drop in the pressure introduction chamber 25s is transmitted to the back pressure chamber 24d via the communication line 28. As a result, a pressure difference is generated between the inlet port 24a side and the back pressure chamber 24d side with the main valve 22 interposed therebetween, and the main valve 22 moves in the direction away from the inlet port 24a. In this way, the first safety valve 21 is in an open state, and the inlet port 24a and the outlet port 24b communicate with each other. Then, the vaporized gas (gas) of the liquefied carbon dioxide (L1) in the tank 11 is discharged from the discharge port 24b.

The second safety valve 31 is disposed at the top of the tank 11 . The second safety valve 31 is configured to function when the liquefied gas L2 is stored in the tank 11 . The second safety valve 31 releases the pressure in the tank 11 when the gaseous pressure in the tank 11 reaches a predetermined set pressure. The second safety valve 31 includes a main valve 32 having the same structure as the first safety valve 21 and a second pilot valve 33 .

The main valve 32 is disposed in the main valve box 34 . In the main valve box 34, an inlet 34a and an outlet 34b are formed. The inlet port 34a communicates with the inside of the tank 11 . As shown in FIG. 2 , a connection pipe 45 described later is connected to the discharge port 34b. The main valve 32 is configured to be able to disconnect from the inlet port 34a. When the main valve 32 closes the inlet 34a, the second safety valve 31 is closed. The pressure in the tank 11 acts on the main valve 32 from the inlet 34a side. The main valve box 34 has a back pressure chamber 34d on the side opposite to the inlet 34a side of the main valve 32 .

The second pilot valve 33 applies pilot pressure for biasing the main valve 32 in the closing direction. The second pilot valve 33 has the same configuration as the first pilot valve 23, and includes a normal cylinder 35, a valve body 36, and a biasing member 37.

The valve body 36 is disposed so that reciprocating movement is possible within the cylinder 35 . The biasing member 37 is disposed on one side of the reciprocating direction with respect to the valve body 36 . The biasing member 37 biases the valve body 36 to the other side within the cylinder 35 . In the cylinder 35, a pressure introduction chamber 35s is formed on the other side of the valve body 36 (the side opposite to the biasing member 37). The pressure in the tank 11 is transmitted to the pressure inlet chamber 35s via a second pressure inlet line 42 described later. In other words, the pressure introduction chamber 35s can communicate with the inside of the tank 11 through the second pressure introduction line 42, and when communicating with the inside of the tank 11, the inside and the tank 11 It is structured so that the gaseous phase in it may become the same pressure. The pressure introduction chamber 35s and the back pressure chamber 34d are communicated and connected via a communication line 38 .

And, like the valve element 26 of the first pilot valve 23, the valve element 36 of the second pilot valve 33 normally enters the pressure introduction chamber 35s by the biasing member 37. It is loaded to the side. When the pressure in the tank 11 rises, the pressure in the pressure introduction chamber 35s also rises accordingly. Then, when the pressure in the pressure introduction chamber 35s exceeds the biasing force of the biasing member 37, the valve body 36 resists the biasing force of the biasing member 37 and moves within the cylinder 35. And when the pressure in the pressure introduction chamber 35s reaches a predetermined set pressure, the inside of the pressure introduction chamber 35s is released to atmosphere, for example, and the pressure in the pressure introduction chamber 35s falls. The pressure drop in the pressure introduction chamber 35s is transmitted to the back pressure chamber 34d via the communication line 38. As a result, a pressure difference is generated between the inlet port 34a side and the back pressure chamber 34d side with the main valve 32 interposed therebetween, and the main valve 32 moves in the direction away from the inlet port 34a. In this way, the second safety valve 31 is opened, and the inlet port 34a and the outlet port 34b communicate with each other. Then, the gas (gas) which the liquefied gas L2 in the tank 11 vaporized is sent out to the connection pipe 45 from the discharge port 34b.

As shown in FIG. 2 , the vent riser 9 is connected to the second safety valve 31 . More specifically, the vent riser 9 is connected to the second safety valve 31 via a connection pipe 45 . This vent riser 9 is spaced apart from the second safety valve 31, and the liquefied gas L2 sent from the second safety valve 31 vaporizes the gas to the outside (in other words, to the atmosphere). emit The connecting pipe 45 connects the second safety valve 31 and the vent riser 9, and guides the gas delivered from the discharge port 34b of the second safety valve 31 to the vent riser 9. .

The 1st pressure introduction line 41 is a pipe which transmits the pressure in the tank 11 to the 1st pilot valve 23. The 2nd pressure introduction line 42 is a pipe which transmits the pressure in the tank 11 to the 2nd pilot valve 33. The 1st pressure introduction line 41 and the 2nd pressure introduction line 42 are connected to the tank 11 via the switching valve 43. The switching valve 43 in this embodiment is connected to the tank 11 via a pressure supply pipe 44 . The switching valve 43 is a so-called three-way valve, and it is possible to select either one of the first pressure inlet line 41 and the second pressure inlet line 42 to communicate with the pressure supply pipe 44 . The switching valve 43 connects the gaseous phase in the tank 11 and the 1st pressure introduction line 41 or the 2nd pressure introduction line 42 via the pressure supply pipe 44. The switching valve 43 is capable of selectively switching the transmission destination of the pressure in the tank 11 between the first pilot valve 23 and the second pilot valve 33 in this way.

As shown in FIG. 4 , when storing liquefied carbon dioxide L1 in the tank 11, the switching valve 43 connects the first pressure introduction line 41 on the first safety valve 21 side to the tank ( 11) Communicate the gas phase within. On the other hand, as shown in FIG. 5 , when the liquefied gas L2 is stored in the tank 11, the switching valve 43 connects the second pressure introduction line 42 on the second safety valve 31 side with the tank. (11) Connect the gas phase within. In addition, the switching operation of the switching valve 43 may be manually performed by an operator or may be performed automatically.

The switching valve 43 is equipped with a detection part 43s which detects the transfer destination of the pressure in the tank 11. The detection part 43s has a limit switch etc. which detect the switching state of the changeover switch etc. of the selector valve 43. The switching valve 43 is connected to an information output section 43m that outputs information indicating the delivery destination of the pressure detected by the detection section 43s to the outside. The information indicating the destination of the pressure detected by this detection unit 43s is for indicating, for example, whether the destination of the pressure is the first safety valve 21 side or the second safety valve 31 side. . The information output unit 43m can output information indicating the destination of the pressure by, for example, turning on a lamp indicating the destination of the pressure or displaying character information indicating the destination of the pressure.

(action effect)

In ship 1A of the said embodiment, when storing liquefied carbon dioxide L1 in the tank 11, the 1st safety valve 21 is made to function. The 1st safety valve 21 functions by transmitting the pressure in the tank 11 to the 1st pilot valve 23 via the 1st pressure introduction line 41. When the gaseous pressure in the tank 11 reaches a predetermined set pressure, the first pilot valve 23 operates. When the first pilot valve 23 operates, the gas in the tank 11 (gas of liquefied carbon dioxide L1) is discharged to the outside of the tank 11 by the first safety valve 21 .

On the other hand, when storing liquefied gas L2 other than liquefied carbon dioxide L1 in the tank 11, the 2nd safety valve 31 is made to function. The 2nd safety valve 31 functions by transmitting the pressure in the tank 11 to the 2nd pilot valve 33 via the 2nd pressure introduction line 42. When the gaseous pressure in the tank 11 reaches a predetermined set pressure, the second pilot valve 33 operates. When the second pilot valve 33 operates, the second safety valve 31 sends the gas in the tank 11 (the gas in which the liquefied gas L2 is vaporized) to the outside of the tank 11 . And the gas sent out from the tank 11 is sent to the vent riser 9 via the connection pipe 45. After that, the gas guided to the vent riser 9 is discharged from the vent riser 9 to the outside.

In this way, the gas vaporized from the liquefied gas L2 is discharged from the vent riser 9 disposed away from the second safety valve 31, while the gas vaporized from the liquefied carbon dioxide L1 is discharged from the first It is released directly from the safety valve 21. Like the second safety valve 31, the first safety valve 21 is not connected to the connection pipe 45 and the vent riser 9. Therefore, even if dry ice is generated when gas vaporized by liquefied carbon dioxide (L1) is released by the first safety valve 21, clogging of the connection pipe 45 by the generated dry ice can be suppressed. .

Moreover, the switching valve 43 is capable of selectively switching the delivery destination of the pressure in the tank 11 between the first pilot valve 23 and the second pilot valve 33 . That is, when the liquefied carbon dioxide L1 is stored in the tank 11, the pressure in the tank 11 is transmitted to the first safety valve 21, and when the liquefied gas L2 is stored, the second What is necessary is just to switch the switching valve 43 so that the pressure in the tank 11 may be transmitted to the safety valve 31. In this way, appropriate safety valves (the first safety valve 21 and the second safety valve 31) can be selected and functioned according to the contents stored in the tank 11. Therefore, it is possible to easily and safely switch the discharge destination of the contents contained in the tank 11.

Moreover, in ship 1A of the said embodiment, the information which shows the transfer destination of the pressure in the tank 11 in the switching valve 43 detected by the detection part 43s is sent to the outside by the information output part 43m. is output as Therefore, the operator can easily grasp the transfer destination of the pressure in the tank 11 in the switching valve 43 based on the information output from the information output part 43m. That is, if the type of the contained objects stored in the tank 11 and the safety valve functioning by transmitting the pressure in the tank 11 are different, it becomes possible to easily grasp and deal with this.

(Modified Example of Embodiment 1)

In the above embodiment, you may provide a structure as shown below.

As shown in FIGS. 6 and 7 , the connecting pipe 45 constitutes a detachable pipe 49 constituting a part of the connecting pipe 45 and a remainder of the connecting pipe 45 excluding the detachable pipe 49. and a connecting pipe main body 48. The detachable pipe 49 constitutes a part of the connecting pipe 45 in the direction in which the connecting pipe 45 extends. The detachable pipe 49 is configured to be detachable from the connecting pipe main body 48 . The detachable pipe 49 in this modified example is disposed on the side closer to the second safety valve 31 among the connecting pipes 45 . More specifically, the detachable pipe 49 is attached so that communication between the connecting pipe body 48, which is the remainder of the connecting pipe 45, and the second safety valve 31 is possible, and, for example, the connecting pipe main body ( 48) and flanged. In such a structure, as shown in FIG. 6, the detachable pipe 49 is attached as a part of the connecting pipe 45 in normal times. Thus, as in the above embodiment, when the second safety valve 31 functions when the liquefied gas L2 is stored in the tank 11, the vaporized gas of the liquefied gas L2 is transferred to the second safety valve ( 31) through the connection pipe 45 and is guided to the vent riser 9 and discharged to the outside.

In such a configuration, for example, in a state where liquefied carbon dioxide (L1) is stored in the tank 11, when the first safety valve 21 has ceased to function normally for some reason, etc., FIG. 7 As shown, the detachable pipe 49 is separated from the connecting pipe 45. As a result, the discharge port 34b of the second safety valve 31 is opened to the atmosphere, and the gas discharged from the discharge port 34b can be immediately discharged to the atmosphere. In the switching valve 43, even when the liquefied carbon dioxide L1 is stored in the tank 11, the transfer destination of the pressure in the tank 11 is the second pressure introduction line on the second safety valve 31 side. (42). In this way, when the second safety valve 31 functions and the pressure in the tank 11 rises and exceeds a predetermined set pressure, the gas vaporized by the liquefied carbon dioxide L1 in the tank 11 is removed. 2 It can be discharged to the outside (atmosphere) through the safety valve (31).

At this time, in preparation for the case where dry ice is generated by the gas of carbon dioxide released from the second safety valve 31, the detachable pipe 49 is in a separated state. Therefore, the discharge port 34b of the second safety valve 31 is brought into a state close to the case where it is directly opened to the atmosphere, whereby the discretization discharged from the discharge port 34b when the second safety valve 31 is operated. Even if dry ice is generated by carbon gas, clogging of the connection pipe 45 by the generated dry ice can be suppressed.

In addition, in the said modified example, although the detachable pipe 49 was arrange|positioned on the side close to the 2nd safety valve 31 among the connecting pipes 45, it is not limited to this. The detachable pipe 49 should just be arranged in any one position among the connection pipes 45.

<Second Embodiment>

Next, a second embodiment of the floating body according to this invention will be described. In the second embodiment described below, since only the configuration of the safety valve system is different from the first embodiment, the same reference numerals are assigned to the same parts as in the first embodiment, and redundant explanations are omitted.

As shown in FIG. 8, in this 2nd Embodiment, ship 1B as a floating body equips the tank installation 10 with the safety valve system 20B at least.

In this 2nd Embodiment, the tank 11 can selectively store liquefied carbon dioxide L1 and liquefied gas L2 other than liquefied carbon dioxide L1 in its inside. As liquefied gas (L2) other than liquefied carbon dioxide (L1), liquefied petroleum gas (LPG), liquefied natural gas (LNG), ammonia etc. are mentioned, for example.

The loading pipe 13 loads stored gas L supplied from facilities on land or the like into the tank 11 . The loading pipe 13 penetrates the top of the tank 11 from the outside of the tank 11 and extends into the inside of the tank 11 . The front end of the loading pipe 13 is open within the tank 11 .

The unloading pipe 14 sends the stored gas L in the tank 11 outboard. The discharge pipe 14 penetrates the top of the tank 11 from the outside of the tank 11 and extends into the inside of the tank 11 . A pump (not shown) is provided at the front end of the unloading pipe 14 . The pump sucks the stored gas L in the tank 11 . The unloading pipe 14 sends the stored gas L sucked by the pump to the outside of the tank 11 (outboard).

(Configuration of safety valve system)

The safety valve system 20B mainly includes a safety valve 51, a connection pipe 55, and a vent riser 9.

The safety valve 51 is disposed at the top of the tank 11 . The safety valve 51 releases the pressure in the tank 11 when the pressure of the stored gas L in the tank 11 reaches a predetermined set pressure. Also, the safety valve 51 may be of a pilot type as in the first embodiment.

The vent riser 9 is spaced apart from the safety valve 51 and is disposed. The vent riser 9 discharges the vaporized gas of the liquefied gas L2 sent from the safety valve 51 to the outside. The vent riser 9 is connected to the safety valve 51 via a connection pipe 55.

The connection pipe 55 connects the safety valve 51 and the vent riser 9. The connection pipe 55 is connected to the discharge port 54b of the safety valve 51 . The connection pipe 55 has a detachable attachment/detachable pipe 59 in a portion thereof. Like the detachable pipe 49 of the first embodiment, the detachable pipe 59 is connected to the connecting pipe main body 58, which is the remainder of the connecting pipe 55, by a flange connection, for example. Moreover, the detachable pipe 59 of this 2nd Embodiment is arrange|positioned between the connection pipe main body 58 and the safety valve 51, which is the side closer to the safety valve 51 among the connection pipes 55. In addition, regarding this detachable pipe 59, it is not limited to the side close to the safety valve 51 among the connecting pipes 55, You may arrange|position it in any position.

In such a safety valve system 20B, when the liquefied gas L2 is stored in the tank 11, the detachable pipe 59 is connected as a part of the connection pipe 55. When the safety valve 51 operates to release the gas vaporized by the liquefied gas L2 in the tank 11 to the outside, the gas vaporized by the liquefied gas L2 flows from the safety valve 51 to the connecting pipe 55 ) through the vent riser 9 and discharged to the outside.

On the other hand, as shown in FIG. 9 , when liquefied carbon dioxide (L1) is stored in the tank 11, the detachable pipe 59 is separated from the connecting pipe 55. At this time, since the connection pipe 55 is disposed between the safety valve 51 and the connection pipe main body 58, in a state where the detachable pipe 59 is removed, the discharge port 54b of the safety valve 51 , it becomes a state close to that of the case where it is directly open to the atmosphere.

Therefore, the pressure in the tank 11 rises and exceeds a predetermined set pressure, the safety valve 51 operates, and the gas in which the liquefied carbon dioxide (L1) in the tank 11 is vaporized is discharged from the discharge port 54b. Even if dry ice is generated by the discharged carbon dioxide gas, clogging of the connection pipe 55 by the generated dry ice can be suppressed.

(action effect)

According to the ship 1B of the second embodiment, when the liquefied carbon dioxide L1 is stored in the tank 11, the safety valve 51 is removed by removing the detachable pipe 59 which is a part of the connection pipe 55. It can be opened to the atmosphere at a position close to the discharge port (54b) of the. Thus, even if dry ice is generated by the carbon dioxide gas discharged from the discharge port 54b when the safety valve 51 is operated, it is possible to suppress clogging of the connection pipe 55 by the generated dry ice. In addition, when the liquefied gas L2 is stored in the tank 11, when the safety valve 51 operates, the gas in which the liquefied gas L2 sent from the safety valve 51 is vaporized is connected to the connecting pipe 55. It can be guided to the vent riser 9 through and discharged to the outside.

In this way, while the safety valve 51 is shared between the liquefied carbon dioxide L1 and the liquefied gas L2, the attachment and detachment pipes 59 are only attached and detached according to the type of the contained object in the tank 11, The form of release from the safety valve 51 can be appropriately selected. And the operator can easily recognize that the detachable pipe 59 is in a separated state. Therefore, it is possible to easily and safely switch the discharge destination of the contents contained in the tank 11 discharged from the safety valve 51. Moreover, since the safety valve 51 can be used in common for the liquefied carbon dioxide L1 and the liquefied gas L2, equipment cost can be reduced.

(Other embodiments)

As mentioned above, the embodiment of the present disclosure has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and design changes and the like within the range not departing from the gist of the present disclosure are included.

For example, in the above embodiment, the first safety valve 21, the second safety valve 31, and the safety valve 51 are provided one by one, but it is not limited thereto. The first safety valve 21, the second safety valve 31, and the safety valve 51 may each be provided with a plurality of pieces. Settings of the first safety valve 21, the second safety valve 31, and the safety valve 51 when a plurality of the first safety valve 21, the second safety valve 31, and the safety valve 51 are provided. The pressure may be varied stepwise.

Moreover, in the said embodiment, although it was set as the structure provided with the two tanks 11, it is not limited to this. One or three or more tanks 11 may be provided.

Moreover, in the said embodiment, although ship 1A, 1B was illustrated as a floating body, it is not limited to this. The floating body may be a two-sided floating body facility not provided with a propulsion mechanism.

<Bookkeeping>

Floating body 1A, 1B described in each embodiment is grasped as follows, for example.

(1) The floating body 1A, 1B according to the first aspect is disposed on the floating body body 2 and the floating body body 2, and liquefies other than liquefied carbon dioxide L1 and the liquefied carbon dioxide L1 It has a tank 11 capable of selectively storing gas L2 and a first pilot valve 23 that operates when the pressure in the tank 11 reaches a predetermined set pressure, and the first pilot valve ( 23) is operated to transfer the pressure in the tank 11 to the first safety valve 21 that releases the pressure in the tank 11 to the outside of the tank 11 and the first pilot valve 23 It has a first pressure inlet line 41 and a second pilot valve 33 that operates when the pressure in the tank 11 reaches a predetermined set pressure, and the second pilot valve 33 operates. By doing so, the second safety valve 31 for sending the gas in the tank 11 to the outside of the tank 11 and a vent spaced apart from the second safety valve 31 and discharging the gas to the outside A connecting pipe connecting the riser (9), the second safety valve (31) and the vent riser (9) and leading the gas sent from the second safety valve (31) to the vent riser (9) 45, the second pressure introduction line 42 for transmitting the pressure in the tank 11 to the second pilot valve 33, and the transfer destination of the pressure in the tank 11 as the first pilot valve (23) and a switching valve (43) for selectively switching between the second pilot valve (33).

As an example of floating body 1A, 1B, a ship and a floating body installation are mentioned. As an example of the floating body body 2, the floating body body of a hull or a floating body facility can be mentioned.

Examples of the liquefied gas L2 include liquefied petroleum gas, liquefied natural gas, and ammonia.

When storing liquefied carbon dioxide L1 in the tank 11, these floating bodies 1A and 1B cause the first safety valve 21 to function. The 1st safety valve 21 functions by transmitting the pressure in the tank 11 to the 1st pilot valve 23 via the 1st pressure introduction line 41. When the pressure in the tank 11 reaches the set pressure, the first pilot valve 23 operates. When the first pilot valve 23 operates, the gas in the tank 11 (the gas in which the liquefied carbon dioxide L1 is vaporized) can be discharged to the outside of the tank 11 by the first safety valve 21 .

When storing liquefied gas L2 other than liquefied carbon dioxide L1 in the tank 11, the 2nd safety valve 31 is made to function. The second safety valve 31 functions by transmitting the pressure in the tank 11 to the second pilot valve 33 via the second pressure introduction line 42 . When the pressure in the tank 11 reaches the set pressure, the second pilot valve 33 operates. When the second pilot valve 33 operates, the second safety valve 31 sends the gas in the tank 11 (the gas in which the liquefied gas L2 is vaporized) to the outside of the tank 11 . The gas sent from the second safety valve 31 is sent to the vent riser 9 via the connection pipe 45 . This gas is discharged from the vent riser 9 to the outside. In this way, the gas vaporized from the liquefied gas L2 is discharged from the vent riser 9 disposed away from the second safety valve 31, while the gas vaporized from the liquefied carbon dioxide L1 is discharged from the first It is released directly from the safety valve 21. Therefore, even if dry ice is generated when the carbon dioxide gas is discharged by the first safety valve 21, it is possible to suppress clogging of the connection pipe 45 by the generated dry ice.

The switching valve 43 selectively switches the delivery destination of the pressure in the tank 11 between the first pilot valve 23 and the second pilot valve 33 . That is, when the liquefied carbon dioxide L1 is stored in the tank 11, the pressure in the tank 11 is transmitted to the first safety valve 21, and when the liquefied gas L2 is stored, the second What is necessary is just to switch the switching valve 43 so that the pressure in the tank 11 may be transmitted to the safety valve 31. Thereby, by storing in the tank 11, the appropriate safety valves 21 and 31 can function. Therefore, it is possible to easily and safely switch the discharge destination of the contents contained in the tank 11 discharged from the safety valves 21 and 31.

(2) The floating bodies 1A and 1B according to the second aspect are the floating bodies 1A and 1B of (1), and detect the transfer destination of the pressure in the tank 11 in the switching valve 43 It further includes a detection unit 43s and an information output unit 43m that outputs the information indicating the delivery destination detected by the detection unit 43s to the outside.

Thereby, the information indicating the transmission destination of the pressure in the tank 11 in the switching valve 43 detected by the detection part 43s is output to the outside by the information output part 43m. Therefore, the operator can easily grasp the transfer destination of the pressure in the tank 11 in the switching valve 43 based on the information output from the information output part 43m.

(3) The floating bodies 1A and 1B according to the third aspect are the floating bodies 1A and 1B of (1) or (2), and the connecting pipe 45 is in the direction in which the connecting pipe 45 extends. A detachable pipe 49 constituting a part of the connecting pipe 45 and a connecting pipe main body 48 constituting the remainder of the connecting pipe 45, wherein the attaching pipe 49 comprises the connecting pipe With respect to the main body 48, it is comprised so that attachment or detachment is possible.

In this way, the detachable pipe 49, which is a part of the connection pipe 45 connected to the second safety valve 31, is separated, and the gas discharged from the discharge port 34b of the second safety valve 31 is immediately discharged into the atmosphere. . Therefore, in the state where the liquefied carbon dioxide (L1) is stored in the tank 11, when the first safety valve 21 does not operate normally, the connection pipe 45 is disconnected and the second safety valve ( Even if dry ice is generated by the carbon dioxide gas discharged from the discharge port 34b during the operation of 31), it is possible to prevent the connection pipe 45 from being blocked by the generated dry ice.

(4) The floating body 1A, 1B according to the fourth aspect is disposed on the floating body body 2 and the floating body body 2, and liquefies other than the liquefied carbon dioxide L1 and the liquefied carbon dioxide L1 A tank 11 capable of selectively storing gas L2, and sending the pressure in the tank 11 to the outside of the tank 11 when the pressure in the tank 11 reaches a predetermined set pressure A safety valve 51 and a vent riser 9 disposed apart from the safety valve 51 and discharging the gas to the outside, and connecting the safety valve 51 and the vent riser 9, A connection pipe 55 for guiding the gas sent from the safety valve 51 to the vent riser 9 is provided, and the connection pipe 55 extends in the direction in which the connection pipe 55 extends. A detachable pipe 59 constituting a part of the pipe 55 and a connecting pipe main body 58 constituting the remainder of the connecting pipe 55, the attaching pipe 59 comprising the connecting pipe main body ( 58) is configured to be detachable.

Thus, when storing liquefied carbon dioxide (L1) in the tank 11, the gas discharged from the discharge port 54b of the safety valve 51 can be immediately discharged to the atmosphere by separating a part of the connection pipe 55. there is. Thus, even if dry ice is generated by the carbon dioxide gas discharged from the discharge port 54b when the safety valve 51 is operated, it is possible to suppress clogging of the connection pipe 55 by the generated dry ice.

In addition, when the liquefied gas L2 is stored in the tank 11, when the safety valve 51 operates, the gas in which the liquefied gas L2 sent from the safety valve 51 is vaporized is connected to the connecting pipe 55. It is discharged to the outside from the vent riser (9) through. In this way, while the safety valve 51 is shared between the liquefied carbon dioxide L1 and the liquefied gas L2, the discharge form from the safety valve 51 is changed according to the type of the contained object in the tank 11. can be selected appropriately. And the operator can easily recognize that the detachable pipe 59 is in a separated state. Therefore, it is possible to easily and safely switch the discharge destination of the contents contained in the tank 11 discharged from the safety valve 51. Moreover, since the safety valve 51 can be used in common for the liquefied carbon dioxide L1 and the liquefied gas L2, equipment cost can be reduced.

According to the floating body of the present disclosure, it is possible to easily and safely switch the discharge destination of the tank contents discharged from the safety valve.

1A, 1B... ship (floating body)
2… hull (floating body)
2a... player
2b... stern
3A, 3B... side
5... upper deck
7... superstructure
8… cargo loading compartment
9... vent riser
10... tank equipment
11... Tank
13... loading piping
14... unloading pipe
20A, 20B... safety valve system
21... 1st safety valve
22... main valve
23... 1st pilot valve
24... main valve valve box
24a... inlet
24b... outlet
24d... back pressure chamber
25... cylinder
25s... pressure introduction room
26... valve body
27... Absence of tax
28... communication line
31... 2nd safety valve
32... main valve
33... 2nd pilot valve
34... main valve valve box
34a... inlet
34b... outlet
34d... back pressure chamber
35... cylinder
35s... pressure introduction room
36... valve body
37... Absence of tax
38... communication line
41... 1st pressure introduction line
42... Second pressure introduction line
43... diverter valve
43m... information output
43s... detection unit
44... pressure supply pipe
45... connector
48... connector body
49... detachable tube
51... safety valve
53... pilot valve
54b... outlet
55... connector
58... connector body
59... detachable tube
L... undercurrent gas
L1... liquefied carbon dioxide
L2... liquefied gas

Claims (4)

a floating body,
A tank disposed on the floating body body and capable of selectively storing liquefied carbon dioxide and liquefied gas other than liquefied carbon dioxide;
A first safety valve having a first pilot valve operated when the pressure in the tank reaches a predetermined set pressure, and discharging the gas in the tank to the outside of the tank by operating the first pilot valve;
a first pressure inlet line for transmitting the pressure in the tank to the first pilot valve;
a second safety valve having a second pilot valve operated when the pressure in the tank reaches a predetermined set pressure, and discharging the gas in the tank to the outside of the tank when the second pilot valve operates;
a vent riser disposed spaced apart from the second safety valve and discharging the gas to the outside;
a connecting pipe connecting the second safety valve and the vent riser and guiding the gas sent from the second safety valve to the vent riser;
a second pressure inlet line for transmitting the pressure in the tank to the second pilot valve;
A floating body comprising a switching valve that selectively switches a transfer destination of the pressure in the tank between the first pilot valve and the second pilot valve. The method of claim 1,
a detection unit for detecting a transfer destination of the pressure in the tank in the switching valve;
The floating body further comprising an information output unit that outputs the information indicating the delivery destination detected by the detection unit to the outside. According to claim 1 or claim 2,
The connection pipe,
A detachable pipe constituting a part of the connecting pipe in a direction in which the connecting pipe extends, and a connecting pipe main body constituting the remainder of the connecting pipe,
The detachable pipe is a floating body configured to be detachable from the connecting pipe main body. a floating body,
A tank disposed on the floating body body and capable of selectively storing liquefied carbon dioxide and liquefied gas other than liquefied carbon dioxide;
A safety valve for discharging the gas in the tank to the outside of the tank when the pressure in the tank reaches a predetermined set pressure;
A vent riser disposed apart from the safety valve and discharging the gas to the outside;
a connecting pipe connecting the safety valve and the vent riser and guiding the gas sent from the safety valve to the vent riser;
The connection pipe,
A detachable pipe constituting a part of the connecting pipe in a direction in which the connecting pipe extends, and a connecting pipe main body constituting the remainder of the connecting pipe,
The detachable pipe is a floating body configured to be detachable from the connecting pipe main body.

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