KR20220093241A - Ship - Google Patents

Abstract

The ship includes a hull, a tank provided in the hull, in which one of ammonia and carbon dioxide is stored, a supply line for supplying the other of ammonia and carbon dioxide in the tank, and ammonia and carbon dioxide in the tank through the supply line A discharge line for discharging a mixed gas in which one of the ammonia and carbon dioxide stored in the tank and the other of the ammonia and carbon dioxide supplied into the tank by the supply line is mixed when the other of the carbon is supplied; It is provided in the hull, and is provided with a water tank in which water is stored and the mixed gas discharged from the discharge line is introduced.

Description

Ship

The present disclosure relates to a ship.

This application claims priority with respect to Japanese Patent Application No. 2019-228934 for which it applied to Japan on December 19, 2019, The content is used here.

The tank which stores liquefied gas is provided in the ship etc. which convey liquefied gas. In such a tank, when the tank is opened by maintenance or the like, the inert gas is first filled in the tank so that the liquefied gas remaining in the tank and oxygen do not come into contact, and then the inert gas in the tank is evacuated to the atmosphere or the like. It may be substituted (for example, refer patent document 1).

Patent Document 1: Japanese Patent Application Laid-Open No. 2013-193653

By the way, in the tank which stores the said liquefied gas, the kind of gas stored in the tank may be switched. At this time, there is a possibility that a trouble may occur due to the contact between the residual gas of the first gas stored in the tank before switching and the second gas stored in the tank after switching. As this trouble, for example, a 1st gas and 2nd gas chemically react, and that solid substance etc. will be produced|generated can be illustrated. Moreover, 1st gas may mix with 2nd gas, and 1st gas may remain in a tank after switching. Therefore, when switching the type of gas stored in the tank, similarly to the case of the inert gas of Patent Document 1, after replacing the first gas in the tank with an inert gas, the second gas is loaded into the tank. You need to operate like this.

However, in the above method, when the type of gas loaded in the tank is switched, the first gas is discharged out of the tank, the inert gas in the tank is replaced, and the second gas in the tank is changed. Since it is necessary to sequentially perform processes such as loading, it takes a lot of trouble and time to switch the type of gas to be loaded into the tank. Moreover, depending on the kind of residual gas in a tank, a residual gas cannot be directly discharged|released from a tank to the atmosphere, and processing of a residual gas may become cumbersome.

The present disclosure has been made in order to solve the above problems, and an object of the present disclosure is to provide a ship capable of suppressing the trouble and time required for the operation of switching the type of gas loaded in the tank.

In order to solve the above problems, the ship according to the present disclosure includes a hull, a tank provided in the hull in which one of ammonia and carbon dioxide is stored, and a supply line for supplying the other of ammonia and carbon dioxide in the tank; When the other of ammonia and carbon dioxide is supplied into the tank through the supply line, one of the ammonia and carbon dioxide stored in the tank and the other of the ammonia and carbon dioxide supplied into the tank by the supply line are mixed. and a discharge line for discharging the mixed gas, and a water tank provided in the hull, in which water is stored, and the mixed gas discharged from the discharge line is introduced.

ADVANTAGE OF THE INVENTION According to the ship of this indication, switching of the kind of gas loaded in a tank can be performed efficiently, and the trouble and time required for an operation|work can be suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a top view which shows schematic structure of the ship which concerns on embodiment of this indication.
It is a tank to which the ship which concerns on embodiment of this indication is applied. WHEREIN: It is a side cross-sectional view which shows the state which loaded the tank with liquefied carbon dioxide.
3 is a side cross-sectional view showing a state in which liquefied ammonia is loaded in the tank to which the ship according to the embodiment of the present disclosure is applied.
4 is a side cross-sectional view showing a state in which ammonia gas remains in a tank from which liquefied ammonia has been dispensed in the ship according to the embodiment of the present disclosure.
5 is a side cross-sectional view showing a state in which liquefied carbon dioxide is supplied to a tank and a mixed gas is introduced into a water tank in the ship according to the embodiment of the present disclosure.
6 is a side cross-sectional view showing a state in which carbon dioxide gas remains in a tank from which liquefied carbon dioxide has been dispensed in the ship according to the embodiment of the present disclosure.
7 is a side cross-sectional view showing a state in which liquefied ammonia is supplied to a tank and a mixed gas is introduced into a water tank in the ship according to the embodiment of the present disclosure.

EMBODIMENT OF THE INVENTION Hereinafter, the ship which concerns on embodiment of this indication is demonstrated with reference to FIGS. 1-7.

(the composition of the ship's hull)

The ship 1 of embodiment of this indication shown to FIG. 1, FIG. 2 is capable of selectively transporting liquefied carbon dioxide and liquefied ammonia, for example. The ship 1 has a hull 2 , a tank 21 , an upper supply line 32 , a lower supply line 33 as a supply line, a discharge line 35 , and a water tank 50 . is provided at least.

(configuration of hull)

As shown in FIG. 1 , the hull 2 comprises a pair of side sides 3A and 3B, a ship bottom (not shown), and a deck 5 forming an outer shell thereof. has a The chord sides 3A and 3B are provided with a pair of chord side shell plates respectively forming the left and right chord sides. The ship bottom (not shown) is equipped with the ship bottom shell plate which connects these side 3A, 3B. By these pair of chord sides 3A, 3B and a ship bottom (not shown), the outer shell of the hull 2 is a cross section orthogonal to the fore and aft direction Da. WHEREIN: U-shape, have. The deck 5 illustrated in this embodiment is a traditional deck exposed to the outside. In the hull 2, on the deck 5 on the side of the stern 2b, the upper structure 7 which has a dwelling is formed.

In the hull 2, a cargo loading compartment (hold) 8 is formed on the bow 2a side rather than the upper structure 7 . The cargo loading compartment 8 is indented toward a ship bottom (not shown) below with respect to the deck 5, and is opened above.

(configuration of tank)

A plurality of tanks 21 are arranged in the cargo loading compartment 8 . In this embodiment, for example, a total of seven tanks 21 are arranged in the cargo loading compartment 8 . The layout of the tanks 21 in the cargo loading compartment 8 and the number of installations are not limited in any way. In this embodiment, each tank 21 is a cylindrical shape extending in the horizontal direction (specifically, a fore and aft direction), for example. In addition, the tank 21 is not limited to a cylindrical shape, A spherical shape may be sufficient as it.

(Configuration of supply line)

As shown in FIG. 2 , the upper supply line 32 and the lower supply line 33 are provided in each tank 21 .

The upper supply line 32 runs from the outside of the tank 21 to the inside of the tank 21 . An opening 32a opened at the top in the tank 21 is formed at the tip of the upper supply line 32 . Here, the upper part in the tank means the side closer to the upper end of the tank 21 than the center of the tank 21 in the ship height direction (in other words, the up-down direction of the tank 21) among the regions in the tank 21. It means the area of, as an example, the top and bottom of the tank 21 are mentioned. The upper supply line 32 is provided with an on-off valve 32v. In addition, a discharge line 35 is branched to the upper supply line 32 .

The lower supply line 33 leads from the outside of the tank 21 to the inside of the tank 21 . At the tip of the lower supply line 33 , an opening 33a opened at the lower portion of the tank 21 is formed. Here, the lower part in the tank 21 means an area on the side closer to the lower end of the tank 21 than the center of the tank 21 in the ship-height direction among the areas in the tank 21 , and as an example , the bottom of the tank 21 is mentioned. The lower supply line 33 is provided with an on-off valve 33v.

(Configuration of the discharge line)

When the type of gas loaded in the tank 21 is switched, the discharge line 35 transfers the gas containing at least one of ammonia and carbon dioxide stored in the tank 21 to the outside of the tank 21 . discharge One end of the discharge line 35 is branched from the upper supply line 32 . This discharge line 35 is provided with an on-off valve 35v.

(Configuration of water tank)

The water tank 50 is provided in the ship body 2 (refer FIG. 1). The water tank 50 may be, for example, a ballast tank provided in the ship body 2 . The water tank 50 is capable of storing water W therein. The water W stored in the water tank 50 may be seawater. In the water tank 50 , the other end of the discharge line 35 is disposed. Accordingly, the gas discharged from the tank 21 through the discharge line 35 is introduced into the water W in the water tank 50 .

The water tank 50 illustrated in this embodiment is provided with a heating unit 52 . The heating unit 52 is configured to be able to heat the water W in the water tank 50 . For example, a component (carbon dioxide or ammonia) contained in the gas discharged from the tank causes a chemical reaction through water (W), and the substance (for example, ammonium carbonate) produced by the chemical reaction is transferred to the water tank ( 50) may be dissolved in the water (W). In this case, by heating the water W in the water tank 50 by the heating part 52, it becomes possible to separate into the components (carbon dioxide, ammonia, and water) before the said chemical reaction.

In addition, a separation gas discharge line 53 is connected to the water tank 50 illustrated in this embodiment. The gas containing the component separated by the heating unit 52 can be discharged overboard by the separation gas discharge line 53 .

(Loading and discharging of liquefied gas to the tank)

The tank 21 is selectively loaded with either one of liquefied carbon dioxide (Lc) and liquefied ammonia (La).

When the ship 1 repeatedly transports only either one of the liquefied carbon dioxide (Lc) and the liquefied ammonia (La), the loading of the liquefied carbon dioxide into the tank 21 or the tank 21 is carried out as follows. Loading of liquefied ammonia to

(Loading of liquefied carbon dioxide into the tank)

As shown in FIG. 2, in order to load liquefied carbon dioxide (Lc) into the tank 21, a pipe through which liquefied carbon dioxide (Lc) is supplied from an offboard liquefied carbon dioxide supply facility or the like to the lower supply line 33 ( not shown) is connected. With the on-off valve 33v in an open state, liquefied carbon dioxide (Lc) is introduced into the lower supply line 33 from the outboard. Then, liquefied carbon dioxide (Lc) is loaded in the tank 21 from the opening part 33a. In this way, liquefied carbon dioxide (Lc) is stored in the tank 21 . Moreover, in the upper part in the tank 21, carbon dioxide gas (Gc) in which a part of liquefied carbon dioxide (Lc) was vaporized exists. In addition, loading of the liquefied carbon dioxide (Lc) to the tank 21 may be performed through the upper supply line 32 with the on-off valve 32v in an open state.

(Loading of liquefied ammonia into the tank)

As shown in FIG. 3 , in order to load liquefied ammonia La into the tank 21, a pipe (not shown) through which liquefied ammonia La is supplied to the lower supply line 33 from an offboard liquefied ammonia supply facility or the like. ) is connected. With the on-off valve 33v in an open state, liquefied ammonia La is introduced into the lower supply line 33 from the outboard. Then, liquefied ammonia La is loaded in the tank 21 from the opening part 33a. In this way, liquefied ammonia La is stored in the tank 21 . Moreover, in the upper part in the tank 21, ammonia gas Ga in which a part of liquid ammonia La was vaporized exists. In addition, loading of the liquefied ammonia La into the tank 21 may be performed through the upper supply line 32 with the on-off valve 32v in an open state.

(gas displacement for liquid carbon dioxide from liquid ammonia)

When replacing the liquefied gas loaded in the tank 21 with liquefied carbon dioxide from liquefied ammonia, first, liquefied ammonia La in the tank 21 is discharged to an offboard liquefied ammonia recovery facility or the like. In order to discharge the liquefied ammonia (La) stored in the tank 21, the on/off valve 33v is opened, for example, by a cargo pump (not shown) through the lower supply line 33 through the tank ( 21) Aspirate liquefied ammonia (La) from the inside. Thereby, the liquefied ammonia La in the tank 21 is discharged to an offboard liquefied ammonia recovery facility or the like through the lower supply line 33 .

After discharging the liquefied ammonia La in the tank 21 , ammonia gas Ga remains in the tank 21 as shown in FIG. 4 .

Then, as shown in FIG. 5, liquefied carbon dioxide (Lc) is supplied to the lower part of the tank 21. As shown in FIG. In order to supply liquefied carbon dioxide (Lc) to the tank 21, the on-off valve 33v is opened, and liquefied carbon dioxide (Lc) is introduced into the lower supply line 33 from the outboard. Liquefied carbon dioxide (Lc) is loaded into the tank 21 from the opening 33a. Liquefied carbon dioxide (Lc) has a larger specific gravity than ammonia gas (Ga) in the tank 21 . For this reason, the liquefied carbon dioxide (Lc) introduced into the tank 21 is stored in the lower part of the tank 21 . The ammonia gas Ga is stored above the liquefied ammonia La in the tank 21 . Moreover, in the upper part of the tank 21, the carbon dioxide gas (Gc) produced|generated by vaporizing liquefied carbon dioxide (Lc) is also stored. That is, when liquefied carbon dioxide (Lc) is supplied in the tank 21 , the mixed gas Gm of ammonia gas (Ga) and carbon dioxide gas (Gc) is stored in the upper part of the tank 21 .

When sending liquefied carbon dioxide (Lc) into the tank 21 as described above, the on-off valve 35v provided in the discharge line 35 is opened. If liquefied carbon dioxide (Lc) is continuously supplied to the lower part of the tank 21, as the amount of liquefied carbon dioxide (Lc) in the tank 21 increases, ammonia gas (Ga) in the upper part of the tank 21 The mixed gas Gm of and carbon dioxide gas Gc is pushed upward in the tank 21 . The pushed-up mixed gas Gm flows into the upper supply line 32 from the opening 32a opened at the top in the tank 21 . The mixed gas Gm introduced into the upper supply line 32 is introduced into the water W in the water tank 50 through the discharge line 35 .

Then, ammonia (NH ₃ ) and carbon dioxide (CO ₂ ), which are components included in the mixed gas (Gm), are released in water (W) and cause a chemical reaction through water (W) (H ₂ O) . Then, solid ammonium carbonate ((NH ₄ ) ₂ CO ₃ ) or ammonium hydrogen carbonate (NH ₄ ·HCO ₃ ) is produced by this chemical reaction. The generated ammonium carbonate or ammonium hydrogen carbonate is stored in the water tank 50 in a state of being dissolved in water (W).

In addition, in the initial stage of starting to send liquefied carbon dioxide (Lc) into the tank 21, from the top of the tank 21, not the mixed gas (Gm), but only the ammonia gas (Ga) to the upper supply line (32) If discharged, ammonia gas (Ga) may not be introduced into the water tank 50 and may be recovered by an ammonia gas recovery facility or the like provided onboard through the upper supply line 32 .

When a predetermined amount of liquefied carbon dioxide Lc is stored in the tank 21, the on-off valves 33v and 35v are put into a closed state. Thereby, the operation|work which replaces the liquefied gas loaded in the tank 21 with liquefied carbon dioxide (Lc) from liquefied ammonia (La) is completed.

(gas displacement from liquefied carbon dioxide to liquefied ammonia)

When replacing the liquefied gas loaded in the tank 21 from liquefied carbon dioxide to liquefied ammonia, first, the liquefied carbon dioxide (Lc) in the tank 21 is discharged to an offboard liquefied carbon dioxide recovery facility or the like. In order to discharge the liquefied carbon dioxide (Lc) stored in the tank 21, the on-off valve 33v is opened, for example, by a cargo pump (not shown) through the lower supply line 33 to the tank. (21) Liquefied carbon dioxide (Lc) is sucked out from the inside. Thereby, the liquefied carbon dioxide (Lc) in the tank 21 is discharged to an offboard liquefied carbon dioxide recovery facility or the like through the lower supply line 33 .

After discharging the liquefied carbon dioxide (Lc) in the tank 21, carbon dioxide gas (Gc) remains in the tank 21 as shown in FIG.

Subsequently, as shown in FIG. 7 , liquefied ammonia La is supplied to the lower part of the tank 21 . In order to supply liquefied ammonia La to the tank 21, the on-off valve 33v is opened, and liquefied ammonia La is introduced into the lower supply line 33 from the outboard. Then, liquefied ammonia La is loaded in the tank 21 from the opening part 33a.

Liquid ammonia La has a larger specific gravity than carbon dioxide gas Gc in the tank 21 . Therefore, the liquefied ammonia La introduced into the tank 21 is stored in the lower part of the tank 21 . The carbon dioxide gas (Gc) is stored above the liquefied carbon dioxide (Lc) in the tank 21 . Moreover, in the upper part of the tank 21, ammonia gas Ga produced|generated by vaporizing liquefied ammonia La is also stored. That is, when liquefied ammonia La is supplied in the tank 21 , the mixed gas Gm of the carbon dioxide gas Gc and the ammonia gas Ga is stored in the upper part of the tank 21 .

When sending liquefied ammonia (La) into the tank 21 as described above, the on-off valve 35v provided in the discharge line 35 is opened. When liquefied ammonia (La) is continuously supplied to the lower part of the tank 21, as the amount of liquefied ammonia (La) in the tank 21 increases, the carbon dioxide gas (Gc) in the upper part of the tank 21 and The mixed gas Gm of the ammonia gas Ga is pushed upward in the tank 21 . The pushed up mixed gas Gm flows into the upper supply line 32 from the opening 32a opened at the top in the tank 21 . The mixed gas Gm introduced into the upper supply line 32 is introduced into the water W in the water tank 50 through the discharge line 35 .

Then, ammonia (NH ₃ ) and carbon dioxide (CO ₂ ), which are components included in the mixed gas (Gm), are released in water (W) and cause a chemical reaction through water (W) (H ₂ O) . Then, solid ammonium carbonate ((NH ₄ ) ₂ CO ₃ ) or ammonium hydrogen carbonate (NH ₄ ·HCO ₃ ) is produced by this chemical reaction. The generated ammonium carbonate or ammonium hydrogen carbonate is stored in the water tank 50 in a state of being dissolved in water W.

In addition, in the initial stage of starting to send liquefied ammonia (La) into the tank (21), from the upper part of the tank (21), not the mixed gas (Gm), but only the carbon dioxide gas (Gc) to the upper supply line (32) If discharged, the carbon dioxide gas (Gc) may not be introduced into the water tank 50, but may be recovered by a carbon dioxide recovery facility or the like provided onboard as it is, or may be discharged outboard.

When a predetermined amount of liquefied carbon dioxide Lc is stored in the tank 21, the on-off valves 33v and 35v are put into a closed state. Thereby, the liquefied gas loaded in the tank 21 can be replaced with liquefied ammonia (La) from liquefied carbon dioxide (Lc).

(Pyrolysis treatment of water in water tank)

이상으로 가열하면, 탄산 암모늄이나 탄산 수소 암모늄이, 암모니아와 이산화 탄소와 물(W)로 열분해된다. 이들 열분해된 암모니아 및 이산화 탄소는, 분리 가스 배출 라인(53) 등을 통하여 선외에 마련된 처리 설비 등으로 배출된다.As described above, the water W in the water tank 50 can be subjected to thermal decomposition treatment by operating the heating unit 52 . When the heating unit 52 is operated, the water W in which ammonium carbonate or ammonium hydrogen carbonate is dissolved is heated. The water W in the water tank 50, for example 58

When heated above the above, ammonium carbonate and ammonium hydrogen carbonate are thermally decomposed into ammonia, carbon dioxide, and water (W). These pyrolyzed ammonia and carbon dioxide are discharged to a treatment facility provided onboard the ship through a separation gas discharge line 53 or the like.

(action effect)

In the ship 1 of the said embodiment, in the tank 21 in which one of ammonia gas (Ga) and carbon dioxide gas (Gc) remained (stored), and liquefied ammonia (La) and liquefied carbon dioxide in the tank 21. When supplying the other of liquefied ammonia (La) and liquefied carbon dioxide (Lc) from the lower supply line 33 which supplies the other of the carbon (Lc) and the lower supply line 33, liquefied ammonia (La) and liquefied carbon dioxide A discharge line 35 for discharging a mixed gas in which the gas vaporized from the other of the carbon (Lc), and one gas among the ammonia gas (Ga) and the carbon dioxide gas (Gc) remaining in the tank 21 are mixed; , a water tank 50 into which the mixed gas discharged from the discharge line 35 is introduced is provided.

In this configuration, in the tank 21 in which one of the ammonia gas (Ga) and the carbon dioxide gas (Gc) remains, the other of the liquefied ammonia (La) and the liquefied carbon dioxide (Lc) through the lower supply line 33 When supplied, a mixed gas in which ammonia and carbon dioxide are mixed is discharged from the tank 21 . This mixed gas is introduced into the water tank 50 through the discharge line 35 and discharged into the water W. Then, in the tank 21, when ammonia, carbon dioxide, and water come into contact with each other, a chemical reaction occurs to produce ammonium carbonate or ammonium hydrogen carbonate. These ammonium carbonate and ammonium hydrogen carbonate are dissolved in water W and stored. Accordingly, there is no need to discharge the gas or product discharged from the tank 21 overboard when the type of gas is switched. That is, even in a case where it is difficult to discharge the gas discharged from the tank 21 into the atmosphere, the type of gas can be switched. As a result, switching of the type of gas loaded in the tank 21 can be performed efficiently, and the trouble and time required for the operation of switching the type of gas can be suppressed.

In the ship 1 of the above embodiment, further, the heating unit 52 for heating the water W in the water tank 50, and the heating unit 52 to heat the water W from the water W A separation gas discharge line 53 for discharging the separated gas is provided.

In such a configuration, when the type of gas is switched, the water W in the water tank 50 in which the product generated by the chemical reaction of the mixed gas and water is dissolved can be heated by the heating unit 52 . . Therefore, ammonium carbonate or ammonium hydrogen carbonate dissolved in water W is thermally decomposed, and gases, such as carbon dioxide gas and ammonia gas, can be isolate|separated from water W. And, since the gas separated from the water W in the water tank 50 can be discharged from the separation gas discharge line 53, for example, an appropriate timing regardless of the situation of the operation of changing the type of gas. Thus, the gas separated from the water W can be treated.

(Other embodiments)

As mentioned above, although embodiment of this indication was demonstrated in detail with reference to drawings, a specific structure is not limited to this embodiment, The design change etc. of the range which do not deviate from the summary of this indication are included.

In addition, although the water tank 50 was equipped with the heating part 52 in the said embodiment, you may make it provide the heating part 52 outboard processing equipment etc. In this case, the water W in the water tank 50 is discharged overboard while the components and products contained in the gas discharged from the discharge line 35 are dissolved, and treated with an offboard treatment facility or the like.

Moreover, although the case where the discharge line 35 is branch-connected to the upper supply line 32 was illustrated in the said embodiment, the upper supply line 32 was abbreviate|omitted and the discharge line 35 is directly connected to the tank 21. You can connect.

In addition, in the said embodiment, although the case where liquefied ammonia (La) or liquefied carbon dioxide (Lc) is supplied into the tank 21 from the lower part of the tank 21 by the lower supply line 33 was demonstrated, the lower part It is not limited, For example, you may make it supply into the tank 21 liquefied ammonia (La) or liquid carbon dioxide (Lc) from the upper part or center of the tank 21.

<bookkeeping>

The ship 1 described in embodiment is grasped|ascertained as follows, for example.

(1) A ship (1) according to the first aspect includes a hull 2, a tank 21 provided in the hull 2, in which one of ammonia and carbon dioxide is stored, and ammonia in the tank 21 and a supply line 33 for supplying the other of carbon dioxide, and ammonia and carbon dioxide stored in the tank 21 when supplying the other of ammonia and carbon dioxide into the tank 21 through the supply line 33 . A discharge line 35 for discharging a mixed gas in which one of the carbon and the other of ammonia and carbon dioxide supplied into the tank 21 by the supply line 33 is mixed, and the hull 2 are provided in , and a water tank 50 into which the mixed gas discharged from the discharge line 35 is introduced while water W is stored.

When the type of gas to be loaded in the tank 21 is switched, the ship 1 is disposed in the tank 21 in which one of ammonia and carbon dioxide is stored, the other of ammonia and carbon dioxide through a supply line 33 . to supply In doing so, a mixed gas mixture of ammonia and carbon dioxide is discharged from the discharge line 35 . The mixed gas discharged from the tank 21 is introduced into the water tank 50 through the discharge line 35 . When the mixed gas introduced into the tank 21 comes into contact with the water W, for example, ammonium carbonate or ammonium hydrogen carbonate is produced as a product. This product is dissolved in water W by being introduced into the water tank 50 .

In this way, when the type of gas loaded in the tank 21 is switched, the mixed gas discharged from the tank 21 can be chemically reacted with the water W to be stored in the water tank 50 . Therefore, there is no need to discharge the gas or product discharged from the tank 21 overboard when the type of gas is switched. That is, even in a case where it is difficult to discharge the gas discharged from the tank 21 into the atmosphere, the type of gas can be switched. As a result, switching of the type of gas loaded in the tank 21 can be performed efficiently, and the trouble and time required for the operation of switching the type of gas can be suppressed.

(2) The ship (1) according to the second aspect is the ship (1) of (1), comprising: a heating unit 52 for heating the water W in the water tank 50; 52), a separation gas discharge line 53 for discharging the gas separated from the water W by heating the water W is provided.

Accordingly, the water W in the water tank 50 in which the product is dissolved may be heated. Therefore, ammonium carbonate or ammonium hydrogen carbonate dissolved in water W is thermally decomposed, and gases, such as carbon dioxide gas and ammonia gas, can be isolate|separated from water W. In addition, since the gas separated from the water W in the water tank 50 can be discharged from the separation gas discharge line 53 , for example, in the situation of changing the type of gas in the tank 21 . Regardless, the gas separated from the water W can be treated at an appropriate timing.

ADVANTAGE OF THE INVENTION According to the ship of this indication, switching of the kind of gas loaded in a tank can be performed efficiently, and the trouble and time required for an operation|work can be suppressed.

One… Ship
2… hull
2a… player
2b… stern
3A, 3B… side
5… deck
7… superstructure
8… cargo loading compartment
21… Tank
32… upper supply line
32a… opening
32v… on-off valve
33… supply line
33… lower supply line (supply line)
33a… opening
33v… on-off valve
35… discharge line
35v… on-off valve
50… water tank
52... heating part
53… Separation gas discharge line
Da… fore and aft direction
Ga… ammonia gas
Gc... carbon dioxide gas
Gm… mixed gas
La… liquid ammonia
Lc… liquefied carbon dioxide
W… water

Claims (2)

hull and
A tank provided in the hull in which one of ammonia and carbon dioxide is stored;
a supply line for supplying the other of ammonia and carbon dioxide in the tank;
When the other of ammonia and carbon dioxide is supplied into the tank through the supply line, one of the ammonia and carbon dioxide stored in the tank and the other of the ammonia and carbon dioxide supplied into the tank by the supply line are mixed. a discharge line for discharging the mixed gas;
A ship provided in the hull and having a water tank in which water is stored and the mixed gas discharged from the discharge line is introduced. The method according to claim 1,
a heating unit for heating the water in the water tank;
and a separation gas discharge line for discharging the gas separated from the water by heating the water with the heating unit.

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