JP7346276B2 - ship - Google Patents

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Publication number
JP7346276B2
JP7346276B2 JP2019228783A JP2019228783A JP7346276B2 JP 7346276 B2 JP7346276 B2 JP 7346276B2 JP 2019228783 A JP2019228783 A JP 2019228783A JP 2019228783 A JP2019228783 A JP 2019228783A JP 7346276 B2 JP7346276 B2 JP 7346276B2
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Prior art keywords
tank
deck
carbon dioxide
liquefied carbon
loading pipe
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JP2019228783A
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JP2021095050A (en
Inventor
聡成 石田
晋介 森本
俊夫 小形
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Mitsubishi Shipbuilding Co Ltd
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Mitsubishi Shipbuilding Co Ltd
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Priority to JP2019228783A priority Critical patent/JP7346276B2/en
Priority to EP20903905.6A priority patent/EP4079623A4/en
Priority to AU2020407675A priority patent/AU2020407675B2/en
Priority to CN202080086550.3A priority patent/CN114787028B/en
Priority to PCT/JP2020/033878 priority patent/WO2021124620A1/en
Priority to KR1020227020120A priority patent/KR20220098233A/en
Publication of JP2021095050A publication Critical patent/JP2021095050A/en
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Publication of JP7346276B2 publication Critical patent/JP7346276B2/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/14—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed pressurised
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/24—Arrangement of ship-based loading or unloading equipment for cargo or passengers of pipe-lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/004—Details of vessels or of the filling or discharging of vessels for large storage vessels not under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C6/00—Methods and apparatus for filling vessels not under pressure with liquefied or solidified gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03—Orientation
    • F17C2201/035—Orientation with substantially horizontal main axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/054—Size medium (>1 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0352—Pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/013—Carbone dioxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
    • F17C2223/042—Localisation of the removal point
    • F17C2223/046—Localisation of the removal point in the liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0146—Two-phase
    • F17C2225/0153—Liquefied gas, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
    • F17C2225/033—Small pressure, e.g. for liquefied gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/04—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by other properties of handled fluid after transfer
    • F17C2225/042—Localisation of the filling point
    • F17C2225/046—Localisation of the filling point in the liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Description

本開示は、船舶に関する。 The present disclosure relates to ships.

特許文献１には、タンクの頂部付近からタンク底部付近まで導かれたガス積込配管系統を通してＬＮＧ（Liquefied Natural Gas）等の液化ガスをタンク内に積み込むことが開示されている。 Patent Document 1 discloses loading a liquefied gas such as LNG (liquefied natural gas) into a tank through a gas loading piping system led from near the top of the tank to near the bottom of the tank.

特許第５７６９４４５号公報Patent No. 5769445

ところで、特許文献１のようなタンクを用いて液化二酸化炭素を運搬することが要望されている。液化二酸化炭素は、気相、液相、固相が共存する三重点の圧力（以下、三重点圧力と称す）が、ＬＮＧやＬＰＧの三重点圧力に比較して高い。そのため、三重点圧力がタンクの運用圧力に近くなる。タンク内に液化二酸化炭素を収容する場合、以下のような理由により、液化二酸化炭素が凝固してドライアイスが生成される可能性がある。 By the way, there is a demand for transporting liquefied carbon dioxide using a tank as disclosed in Patent Document 1. Liquefied carbon dioxide has a triple point pressure (hereinafter referred to as triple point pressure) where a gas phase, a liquid phase, and a solid phase coexist, which is higher than that of LNG or LPG. Therefore, the triple point pressure becomes close to the tank's operating pressure. When storing liquefied carbon dioxide in a tank, there is a possibility that the liquefied carbon dioxide will solidify and produce dry ice for the following reasons.

特許文献１のような液化ガスを収容するタンクでは、タンク内で開口する積込配管の下端がタンク内の下部に配置されている場合がある。このような配置とすることで、液ヘッドの増加に伴い積込配管の開口付近が加圧される。そのため、積込配管の開口から放出された液化ガスがフラッシュ蒸発することを抑制できる。しかしながら、積込配管のうち最も高い位置に配置された配管頂部では、内部の液化二酸化炭素の圧力が、配管下端における液化二酸化炭素の圧力に対し、タンク内の液化二酸化炭素の液面と配管頂部との高低差に応じた分だけ低くなる。 In a tank that accommodates liquefied gas such as the one disclosed in Patent Document 1, the lower end of a loading pipe that opens inside the tank may be arranged at a lower portion inside the tank. With this arrangement, the vicinity of the opening of the loading pipe is pressurized as the number of liquid heads increases. Therefore, flash evaporation of the liquefied gas discharged from the opening of the loading pipe can be suppressed. However, at the top of the loading piping, which is located at the highest position, the pressure of the liquefied carbon dioxide inside is higher than the pressure of the liquefied carbon dioxide at the bottom of the piping, and the liquid level of the liquefied carbon dioxide in the tank and the top of the piping. The height will be lower according to the height difference between the two.

その結果、タンク運用圧力によっては、液化二酸化炭素の圧力が最も低くなる積込配管の配管頂部において、液化二酸化炭素の圧力が三重点圧力以下となり、液化二酸化炭素の蒸発が生じて、その蒸発潜熱により、蒸発せずに残った液化二酸化炭素の温度低下が生じ、積込配管の配管頂部内で液化二酸化炭素が凝固してドライアイスが生成される可能性が有る。
そして、このように、積込配管内でドライアイスが生成されてしまうと、積込配管内における液化二酸化炭素の流れが阻害され、タンクの運用に影響を及ぼす可能性がある。 As a result, depending on the tank operating pressure, the pressure of the liquefied carbon dioxide at the top of the loading pipe, where the pressure of the liquefied carbon dioxide is the lowest, becomes below the triple point pressure, evaporation of the liquefied carbon dioxide occurs, and its latent heat of evaporation heats up. As a result, the temperature of the liquefied carbon dioxide that remains without being evaporated is lowered, and there is a possibility that the liquefied carbon dioxide will solidify within the top of the loading pipe and produce dry ice.
If dry ice is generated within the loading pipe in this manner, the flow of liquefied carbon dioxide within the loading pipe may be obstructed, which may affect the operation of the tank.

本開示は、上記課題を解決するためになされたものであって、積込配管内でドライアイスが生成されるのを抑え、タンクの運用を円滑に行うことができる船舶を提供することを目的とする。 The present disclosure has been made in order to solve the above problems, and the purpose is to provide a ship that can suppress the generation of dry ice in the loading pipe and smoothly operate the tank. shall be.

上記課題を解決するために、本開示に係る船舶は、船体と、タンクと、積込配管と、を備える。前記船体は、一対の舷側及び甲板を有する。前記タンクは、前記船体に設けられると共に、前記甲板よりも上方の空間と下方の空間とに跨がるように設けられている。前記タンクは、液化二酸化炭素を貯留可能である。前記積込配管は、前記タンクの上端よりも下方に設けられている。前記積込配管は、船外から供給される液化二酸化炭素を前記タンク内に積み込む。前記積込配管は、第一部分と、第二部分と、を備える。前記第一部分は、前記甲板上に延びている。前記第一部分は、船外との連結部を有している。前記第二部分は、前記甲板よりも上方の空間から前記甲板よりも下方の空間に至っている。前記第二部分は、前記タンクの下端に接続されている。 In order to solve the above problems, a ship according to the present disclosure includes a hull, a tank, and a loading pipe. The hull has a pair of sides and a deck. The tank is provided in the hull, and is provided so as to straddle a space above and a space below the deck . The tank can store liquefied carbon dioxide. The loading pipe is provided below the upper end of the tank. The loading pipe loads liquefied carbon dioxide supplied from outside the ship into the tank. The loading pipe includes a first portion and a second portion. The first portion extends above the deck. The first part has a connection part with the outside of the ship. The second portion extends from a space above the deck to a space below the deck . The second part is connected to the lower end of the tank.

本開示の船舶によれば、積込配管内でドライアイスが生成されるのを抑え、タンクの運用を円滑に行うことができる。 According to the ship of the present disclosure, generation of dry ice within the loading pipe can be suppressed, and the tank can be operated smoothly.

本開示の実施形態に係る船舶の平面図である。FIG. 1 is a plan view of a ship according to an embodiment of the present disclosure. 本開示の実施形態に係る船舶に設けられたタンクおよび積込配管を示す断面図である。FIG. 2 is a sectional view showing a tank and loading piping provided in a ship according to an embodiment of the present disclosure. 本開示の実施形態の変形例に係る船舶に設けられたタンクおよび積込配管を示す側断面図である。It is a side sectional view showing a tank and loading piping provided in a ship concerning a modification of an embodiment of this indication.

以下、本開示の実施形態に係る船舶について、図１、図２を参照して説明する。
（船舶の船体構成）
図１、図２に示す本開示の実施形態の船舶１は、液化二酸化炭素を運搬する。この船舶１は、船体２と、タンク２１と、積込配管３０と、を少なくとも備えている。 Hereinafter, a ship according to an embodiment of the present disclosure will be described with reference to FIGS. 1 and 2.
(Ship hull configuration)
A ship 1 according to an embodiment of the present disclosure shown in FIGS. 1 and 2 transports liquefied carbon dioxide. This ship 1 includes at least a hull 2, a tank 21, and a loading pipe 30.

（船体の構成）
船体２は、その外殻をなす、一対の舷側３Ａ，３Ｂと、船底（図示無し）と、甲板５と、を有している。舷側３Ａ，３Ｂは、左右舷側をそれぞれ形成する一対の舷側外板を備える。船底（図示無し）は、これら舷側３Ａ，３Ｂを接続する船底外板を備える。これら一対の舷側３Ａ，３Ｂ及び船底（図示無し）により、船体２の外殻は、船首尾方向Ｄａに直交する断面において、Ｕ字状を成している。この実施形態で例示する甲板５は、外部に露出する全通甲板である。船体２には、船尾２ｂ側の甲板５上に、居住区を有する上部構造７が形成されている。 (hull configuration)
The hull 2 has a pair of sides 3A and 3B forming its outer shell, a bottom (not shown), and a deck 5. The sides 3A and 3B include a pair of side outer plates forming port and starboard sides, respectively. The bottom (not shown) includes a bottom shell plate that connects these sides 3A and 3B. The outer shell of the hull 2 has a U-shape in a cross section perpendicular to the bow and stern direction Da due to the pair of sides 3A, 3B and the bottom (not shown). The deck 5 illustrated in this embodiment is a full deck exposed to the outside. In the hull 2, a superstructure 7 having a living area is formed on a deck 5 on the stern 2b side.

船体２には、上部構造７よりも船首２ａ側に、貨物搭載区画（ホールド）８が形成されている。貨物搭載区画８は、甲板５に対して下方の船底（図示無し）に向けて凹み、上方に開口している。 A cargo loading compartment (hold) 8 is formed in the hull 2 closer to the bow 2a than the superstructure 7. The cargo loading compartment 8 is recessed from the deck 5 toward the bottom of the ship (not shown) and opens upward.

（タンクの構成）
図１に示すように、タンク２１は、貨物搭載区画８内に、複数設けられている。この実施形態におけるタンク２１は、貨物搭載区画８内に、例えば計７個が配置されている。貨物搭載区画８内におけるタンク２１のレイアウト、設置数は何ら限定するものではない。この実施形態において、各タンク２１は、例えば、水平方向（具体的には、船首尾方向）に延びる円筒状である。タンク２１は、その内部に液化二酸化炭素Ｌが収容される。なお、タンク２１は、円筒状に限られるものではなく球形であってもよい。 (Tank configuration)
As shown in FIG. 1, a plurality of tanks 21 are provided within the cargo loading compartment 8. In this embodiment, a total of seven tanks 21 are arranged in the cargo loading compartment 8, for example. The layout and number of tanks 21 installed within the cargo loading compartment 8 are not limited in any way. In this embodiment, each tank 21 has, for example, a cylindrical shape extending in the horizontal direction (specifically, in the bow and aft direction). The tank 21 accommodates liquefied carbon dioxide L therein. Note that the tank 21 is not limited to a cylindrical shape, but may be spherical.

図２に示すように、タンク２１は、甲板５よりも上方の空間と下方の空間とに跨がるように設けられている。つまり、タンク２１の少なくとも一部は、甲板５に形成された開口部５ｈを通して、甲板５よりも上方に突出して設けられている。この実施形態におけるタンク２１では、甲板５よりも上方に上端２１ｔが設けられている。
タンク２１は、甲板５の下方に設けられた下部甲板６上に、サドル２２を介して支持されている。つまり、タンク２１の下端２１ｂは、下部甲板６との間に船高さ方向（以下、単に上下方向Ｄｖと称する）に間隔をあけて設けられている。 As shown in FIG. 2, the tank 21 is provided so as to straddle a space above and a space below the deck 5. That is, at least a portion of the tank 21 is provided so as to protrude above the deck 5 through the opening 5h formed in the deck 5. In the tank 21 in this embodiment, an upper end 21t is provided above the deck 5.
The tank 21 is supported on a lower deck 6 provided below the deck 5 via a saddle 22. That is, the lower end 21b of the tank 21 is provided with a space between it and the lower deck 6 in the ship height direction (hereinafter simply referred to as the vertical direction Dv).

（積込配管の構成）
積込配管３０は、陸上の液化二酸化炭素供給施設やバンカー船等、船外から供給される液化二酸化炭素Ｌをタンク２１内に積み込む。この実施形態における積込配管３０は、タンク２１の上端２１ｔよりも下方に設けられている。積込配管３０は、第一部分３１と、第二部分３２と、を備えている。 (Loading piping configuration)
The loading pipe 30 loads liquefied carbon dioxide L supplied from outside the ship, such as a land-based liquefied carbon dioxide supply facility or a bunker ship, into the tank 21 . The loading pipe 30 in this embodiment is provided below the upper end 21t of the tank 21. The loading pipe 30 includes a first portion 31 and a second portion 32.

第一部分３１は、甲板５上を甲板５に沿うように延びている。第一部分３１の一端には、バンカーステーション等に設けられて船外と連結される連結部３１ｊが形成されている。連結部３１ｊは、例えば、フランジ等を有し、舷側３Ａ、３Ｂの少なくとも一方（例えば舷側３Ａ）に設けられている。連結部３１ｊは、例えば、船幅方向外側を向くように開口を有している。連結部３１ｊには、液化二酸化炭素供給施設やバンカー船等の船外から液化二酸化炭素を供給するための供給管１００の端部が着脱可能とされている。 The first portion 31 extends on the deck 5 along the deck 5. A connecting portion 31j is formed at one end of the first portion 31. The connecting portion 31j is provided at a bunker station or the like and is connected to the outside of the ship. The connecting portion 31j has, for example, a flange or the like, and is provided on at least one of the sides 3A and 3B (for example, the side 3A). The connecting portion 31j has, for example, an opening facing outward in the width direction of the ship. The end of a supply pipe 100 for supplying liquefied carbon dioxide from outside a vessel such as a liquefied carbon dioxide supply facility or a bunker ship is detachably attached to the connecting portion 31j.

第二部分３２は、第一部分３１の他端に連続して設けられている。第二部分３２は、下方延伸部３２ａと、タンク下延伸部３２ｂと、タンク接続部３２ｃと、を有している。 The second portion 32 is provided continuously to the other end of the first portion 31 . The second portion 32 includes a downward extending portion 32a, a tank lower extending portion 32b, and a tank connecting portion 32c.

下方延伸部３２ａは、甲板５上に位置する第一部分３１から船高さ方向の下方に向かって延びている。下方延伸部３２ａは、開口部５ｈとは別に甲板５に形成された挿通孔５ｇ、または開口部５ｈを通して、甲板５よりも上方の空間から下方の空間に至っている。下方延伸部３２ａの下端部は、上下方向Ｄｖで、タンク２１の下端２１ｂよりも下方に配置されている。 The downward extending portion 32a extends downward in the ship height direction from the first portion 31 located on the deck 5. The downwardly extending portion 32a extends from a space above the deck 5 to a space below it through an insertion hole 5g formed in the deck 5 separately from the opening 5h, or through an opening 5h. The lower end portion of the downwardly extending portion 32a is arranged below the lower end 21b of the tank 21 in the vertical direction Dv.

タンク下延伸部３２ｂは、下方延伸部３２ａの下端部に連続して設けられている。タンク下延伸部３２ｂは、下部甲板６上を下部甲板に沿うように延びている。タンク下延伸部３２ｂは、上下方向Ｄｖで、サドル２２によって支持されたタンク２１の下端２１ｂよりも下方に配置されている。 The tank lower extending portion 32b is provided continuously to the lower end portion of the lower extending portion 32a. The tank lower extension portion 32b extends above the lower deck 6 along the lower deck. The tank lower extension portion 32b is arranged below the lower end 21b of the tank 21 supported by the saddle 22 in the vertical direction Dv.

タンク接続部３２ｃは、タンク下延伸部３２ｂに連続して設けられている。タンク接続部３２ｃは、タンク下延伸部３２ｂから上方に立ち上がるように延びている。タンク接続部３２ｃは、タンク２１の下端２１ｂに接続されている。タンク接続部３２ｃの管端３２ｔは、タンク２１の下端２１ｂに形成された連通開口２１ｈに接続されている。この連通開口２１ｈは、タンク２１の下端２１ｂにてタンク２１の内部と外部とを連通させている。ここで、第二部分３２の管端３２ｔは、タンク２１の下端２１ｂにおける内周面２１ｆと上下方向Ｄｖで同じ高さに設けられている。換言すると、第二部分３２の管端３２ｔは、タンク２１の下端２１ｂにおける内周面２１ｆよりも上方（言い換えれば、タンク２１の内側）に向かって突出せず、面一に設けられている。第二部分３２の管端３２ｔは、タンク２１の下端２１ｂにおける内周面２１ｆにおいて、鉛直上方に向かって開口している。 The tank connection portion 32c is provided continuously to the tank lower extension portion 32b. The tank connecting portion 32c extends upward from the tank lower extension portion 32b. The tank connection part 32c is connected to the lower end 21b of the tank 21. A tube end 32t of the tank connection portion 32c is connected to a communication opening 21h formed in the lower end 21b of the tank 21. The communication opening 21h communicates the inside and outside of the tank 21 at the lower end 21b of the tank 21. Here, the tube end 32t of the second portion 32 is provided at the same height as the inner peripheral surface 21f at the lower end 21b of the tank 21 in the vertical direction Dv. In other words, the tube end 32t of the second portion 32 does not protrude upward (in other words, toward the inside of the tank 21) than the inner circumferential surface 21f at the lower end 21b of the tank 21, and is provided flush with the inner peripheral surface 21f. The tube end 32t of the second portion 32 opens vertically upward at the inner peripheral surface 21f of the lower end 21b of the tank 21.

このようにして、第二部分３２は、タンク２１の下端２１ｂに接続されている。第二部分３２は、タンク２１の下端２１ｂに対し、鉛直下方から接続されている。このような積込配管３０は、船外から供給される液化二酸化炭素Ｌを、タンク２１の下端２１ｂからタンク２１内に放出する。 In this way, the second portion 32 is connected to the lower end 21b of the tank 21. The second portion 32 is connected to the lower end 21b of the tank 21 from vertically below. Such a loading pipe 30 discharges liquefied carbon dioxide L supplied from outside the vessel into the tank 21 from the lower end 21b of the tank 21.

（作用効果）
上記実施形態の船舶１は、積込配管３０が、タンク２１の上端２１ｔよりも下方に設けられている。これにより、タンク２１の上部（上端２１ｔ）からタンク２１内に積込配管３０を接続する場合と比較して、タンク２１内の液化二酸化炭素Ｌの液面Ｌｆと、積込配管３０の最も高い位置である第一部分３１との高低差Δｈを抑えることができる。
タンク２１内の液化二酸化炭素Ｌの液面Ｌｆに対する第一部分３１の高低差Δｈを抑えることで、積込配管３０のうち最も高い位置に配置された第一部分３１における液化二酸化炭素Ｌの圧力低下を抑えることができる。その結果、積込配管３０の第一部分３１における液化二酸化炭素Ｌの圧力が、三重点圧力に近づくことを抑えられるので、積込配管３０内で液化二酸化炭素Ｌが凝固してドライアイスが生成されることを抑えられる。したがって、タンク２１内に液化二酸化炭素Ｌを収容する場合に、積込配管３０内でドライアイスが生成されるのを抑え、タンク２１の運用を円滑に行うことが可能となる。 (effect)
In the ship 1 of the above embodiment, the loading pipe 30 is provided below the upper end 21t of the tank 21. As a result, compared to the case where the loading pipe 30 is connected into the tank 21 from the upper part (upper end 21t) of the tank 21, the liquid level Lf of the liquefied carbon dioxide L in the tank 21 and the highest level of the loading pipe 30 are The height difference Δh with respect to the first portion 31, which is the position, can be suppressed.
By suppressing the height difference Δh of the first portion 31 with respect to the liquid level Lf of the liquefied carbon dioxide L in the tank 21, the pressure drop of the liquefied carbon dioxide L in the first portion 31 located at the highest position of the loading pipe 30 can be reduced. It can be suppressed. As a result, the pressure of the liquefied carbon dioxide L in the first portion 31 of the loading pipe 30 can be prevented from approaching the triple point pressure, so that the liquefied carbon dioxide L is solidified in the loading pipe 30 and dry ice is generated. You can prevent things from happening. Therefore, when storing the liquefied carbon dioxide L in the tank 21, it is possible to suppress the generation of dry ice in the loading pipe 30 and to smoothly operate the tank 21.

上記実施形態の船舶１では、更に、積込配管３０の第一部分３１が甲板５上に設けられている。
そのため、第一部分３１については二重管等を採用する必要がなく、コスト増加を抑制できる。 In the ship 1 of the above embodiment, the first portion 31 of the loading pipe 30 is further provided on the deck 5.
Therefore, it is not necessary to employ a double pipe or the like for the first portion 31, and an increase in cost can be suppressed.

上記実施形態の船舶１では、更に、積込配管３０の第二部分３２がタンク２１の下端２１ｂに対して下方から接続されている。そのため、例えば、積込配管３０を用いてタンク２１内の液化二酸化炭素Ｌをタンク２１から払い出す際に、液面Ｌｆの位置によっては重力を利用することができる。したがって、液化二酸化炭素を払い出すためのポンプ運転時間を短縮したり、より能力の低いポンプを使用したりすることが可能となり、その結果、省エネルギー化やポンプの小型化を図ることが可能となる。 In the ship 1 of the above embodiment, the second portion 32 of the loading pipe 30 is further connected to the lower end 21b of the tank 21 from below. Therefore, for example, when discharging the liquefied carbon dioxide L in the tank 21 from the tank 21 using the loading pipe 30, gravity can be used depending on the position of the liquid level Lf. Therefore, it is possible to shorten the pump operation time for pumping out liquefied carbon dioxide, or to use a pump with lower capacity, which results in energy savings and a smaller pump. .

上記実施形態の船舶１は、更に、積込配管３０の第二部分３２の管端３２ｔを、タンク２１の下端２１ｂにおける内周面２１ｆと上下方向Ｄｖで同じ高さに設けている。したがって、タンク２１内の液化二酸化炭素Ｌを払い出す際に、タンク２１内に残留する液化二酸化炭素Ｌの量を抑えることができる。 The ship 1 of the above embodiment further provides the pipe end 32t of the second portion 32 of the loading pipe 30 at the same height as the inner circumferential surface 21f at the lower end 21b of the tank 21 in the vertical direction Dv. Therefore, when the liquefied carbon dioxide L in the tank 21 is discharged, the amount of the liquefied carbon dioxide L remaining in the tank 21 can be suppressed.

（その他の実施形態）
以上、この実施の形態について図面を参照して詳述したが、具体的な構成はこの実施の形態に限られるものではなく、本開示の要旨を逸脱しない範囲の設計変更等も含まれる。
なお、上記実施形態では、一本の積込配管３０を、船体２に設けられた一つのタンク２１に接続する場合について説明した。しかし、積込配管３０は、一本の積込配管３０に対し、複数のタンク２１を接続するようにしてもよい。このように、一本の積込配管３０に複数のタンク２１を接続する場合は、例えば、積込配管３０の第一部分３１に、各タンク２１に接続される第二部分３２を分岐させて設ければよい。つまり、一本の積込配管３０に複数のタンク２１を接続する場合、積込配管３０は、一本の第一部分３１と、複数本の第二部分３２と、を備えることになる。積込配管３０が、一本の第一部分３１と、複数本の第二部分３２と、を備える場合、第二部分３２のそれぞれに、タンク２１への液化二酸化炭素Ｌへの供給を断続するバルブ（図示無し）等を設けてもよい。 (Other embodiments)
Although this embodiment has been described above in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and may include design changes without departing from the gist of the present disclosure.
In addition, in the said embodiment, the case where one loading pipe 30 was connected to one tank 21 provided in the hull 2 was demonstrated. However, a plurality of tanks 21 may be connected to one loading pipe 30. In this way, when connecting a plurality of tanks 21 to one loading pipe 30, for example, the first part 31 of the loading pipe 30 is provided with a branched second part 32 connected to each tank 21. That's fine. That is, when connecting a plurality of tanks 21 to one loading pipe 30, the loading pipe 30 includes one first section 31 and a plurality of second sections 32. When the loading pipe 30 includes one first portion 31 and a plurality of second portions 32, each of the second portions 32 is provided with a valve that cuts off and on the supply of liquefied carbon dioxide L to the tank 21. (not shown) etc. may be provided.

例えば、図３に示すように、積込配管３０の第一部分３１、および第二部分３２の下方延伸部３２ａに対し、各タンク２１に接続されるタンク下延伸部３２ｂ、およびタンク接続部３２ｃを接続するようにしてもよい。つまり、積込配管３０は、一本の積込配管３０の第一部分３１、および第二部分３２の下方延伸部３２ａに対し、複数本のタンク下延伸部３２ｂ、およびタンク接続部３２ｃを分岐接続するようにしてもよい。この場合も、各タンク２１に接続されるタンク下延伸部３２ｂ、およびタンク接続部３２ｃに、タンク２１への液化二酸化炭素Ｌへの供給を断続するバルブ（図示無し）等を設けてもよい。 For example, as shown in FIG. 3, for the first part 31 and the downwardly extending part 32a of the second part 32 of the loading pipe 30, the tank lower extending part 32b connected to each tank 21 and the tank connecting part 32c are connected to each other. You may also connect it. In other words, the loading pipe 30 branches and connects the plurality of tank lower extending parts 32b and the tank connecting part 32c to the first part 31 and the downward extending part 32a of the second part 32 of one loading pipe 30. You may also do so. In this case as well, a valve (not shown) or the like may be provided in the tank lower extension portion 32b and the tank connection portion 32c connected to each tank 21 to interrupt the supply of the liquefied carbon dioxide L to the tank 21.

また、図３に示す構成では、複数のタンク２１同士が、タンク下延伸部３２ｂ、およびタンク接続部３２ｃを介して接続されている。このようにタンク下延伸部３２ｂ、およびタンク接続部３２ｃを介して複数のタンク２１同士が接続されている場合、複数のタンク２１間で液化二酸化炭素Ｌの液面Ｌｆの高さが異なっていれば、タンク下延伸部３２ｂ、およびタンク接続部３２ｃを通して、液化二酸化炭素Ｌのやりとりを行うことができる。つまり、液化二酸化炭素Ｌの液面Ｌｆが高いタンク２１Ａから、液化二酸化炭素Ｌの液面Ｌｆが低いタンク２１Ｂに向かって、例えばポンプを用いずに、重力により液化二酸化炭素Ｌを送り込むことも可能となる。 Further, in the configuration shown in FIG. 3, the plurality of tanks 21 are connected to each other via the tank lower extension portion 32b and the tank connection portion 32c. When a plurality of tanks 21 are connected to each other via the tank lower extension part 32b and the tank connection part 32c in this way, the height of the liquid level Lf of the liquefied carbon dioxide L among the plurality of tanks 21 may be different. For example, liquefied carbon dioxide L can be exchanged through the tank lower extension part 32b and the tank connection part 32c. In other words, it is also possible to send the liquefied carbon dioxide L from the tank 21A, where the liquid level Lf of the liquefied carbon dioxide L is high, to the tank 21B, where the liquid level Lf of the liquefied carbon dioxide L is low, by gravity, without using a pump, for example. becomes.

上記実施形態では、積込配管３０の第一部分３１を、甲板５（外部に露出する全通甲板）上に延びるように設けたがこれに限らない。積込配管３０の第一部分３１は、甲板５以外の甲板、例えば、甲板５よりも上方に設けられた上部甲板や、甲板５よりも下方に設けられた乾舷甲板等の下部甲板に沿って設けるようにしてもよい。この場合、タンク２１は、積込配管３０の第一部分３１が設けられた甲板（上部甲板や下部甲板）の上下の両空間に跨がるように設け、少なくとも上端２１ｔが甲板上に突出するようにすればよい。 In the embodiment described above, the first portion 31 of the loading pipe 30 is provided so as to extend above the deck 5 (the entire deck exposed to the outside), but the present invention is not limited thereto. The first portion 31 of the loading pipe 30 is installed along a deck other than the deck 5, for example, along a lower deck such as an upper deck provided above the deck 5 or a freeboard deck provided below the deck 5. It may also be provided. In this case, the tank 21 is provided so as to span both the upper and lower spaces of the deck (upper deck or lower deck) on which the first portion 31 of the loading pipe 30 is provided, and at least the upper end 21t protrudes above the deck. Just do it.

＜付記＞
実施形態に記載の船舶１は、例えば以下のように把握される。 <Additional notes>
The ship 1 described in the embodiment is understood as follows, for example.

（１）第１の態様に係る船舶１は、一対の舷側３Ａ，３Ｂ及び甲板５を有する船体２と、少なくとも一部が前記甲板５よりも上方に突出して設けられ、液化二酸化炭素Ｌを貯留可能なタンク２１と、前記タンク２１の上端２１ｔよりも下方に設けられ、船外から供給される液化二酸化炭素Ｌを前記タンク２１内に積み込む積込配管３０と、を備え、前記積込配管３０は、前記甲板５上に延び、船外との連結部３１ｊを有した第一部分３１と、前記第一部分３１から下方に延び、前記タンク２１の下端２１ｂに接続された第二部分３２と、を備える。
甲板５の例としては、曝露甲板や、曝露甲板よりも下方に設けられた乾舷甲板等の下部甲板、曝露甲板よりも上方に設けられた上部甲板板等が挙げられる。 (1) A ship 1 according to a first aspect includes a hull 2 having a pair of sides 3A, 3B and a deck 5, and is provided with at least a portion protruding above the deck 5, and stores liquefied carbon dioxide L. The loading pipe 30 is provided below the upper end 21t of the tank 21 and loads liquefied carbon dioxide L supplied from outside the vessel into the tank 21. The first part 31 extends above the deck 5 and has a connection part 31j with the outside of the ship, and the second part 32 extends downward from the first part 31 and is connected to the lower end 21b of the tank 21. Be prepared.
Examples of the deck 5 include an exposure deck, a lower deck such as a freeboard deck provided below the exposure deck, and an upper deck provided above the exposure deck.

この船舶１は、積込配管３０が、タンク２１の上端２１ｔよりも下方に設けられている。これにより、タンク２１の上部からタンク２１内に積込配管３０を接続する場合に比較し、積込配管３０の最も高い位置の高さを抑えることができる。積込配管３０の最も高い位置における液化二酸化炭素Ｌの圧力は、タンク２１内に貯留される液化二酸化炭素Ｌの圧力に対し、高低差に応じたヘッド圧分だけ低くなるが、積込配管３０の最も高い位置の高さを抑えることで、積込配管３０の最も高い位置における液化二酸化炭素Ｌの圧力低下を抑えることができる。その結果、積込配管３０の最も高い位置における液化二酸化炭素Ｌの圧力が、三重点圧力に近づくことを抑えられる。これにより、積込配管３０内で液化二酸化炭素Ｌが凝固してドライアイスが生成されることを抑えられる。その結果、タンク２１内に液化二酸化炭素Ｌを収容する場合において、積込配管３０内でドライアイスが生成されるのを抑え、タンク２１の運用を円滑に行うことが可能となる。 In this ship 1, the loading pipe 30 is provided below the upper end 21t of the tank 21. Thereby, the height of the highest position of the loading pipe 30 can be suppressed compared to the case where the loading pipe 30 is connected into the tank 21 from the upper part of the tank 21. The pressure of the liquefied carbon dioxide L at the highest position of the loading pipe 30 is lower than the pressure of the liquefied carbon dioxide L stored in the tank 21 by the head pressure corresponding to the height difference. By suppressing the height of the highest position of the loading pipe 30, the pressure drop of the liquefied carbon dioxide L at the highest position of the loading pipe 30 can be suppressed. As a result, the pressure of the liquefied carbon dioxide L at the highest position of the loading pipe 30 can be prevented from approaching the triple point pressure. Thereby, it is possible to prevent the liquefied carbon dioxide L from solidifying within the loading pipe 30 and producing dry ice. As a result, when storing the liquefied carbon dioxide L in the tank 21, it is possible to suppress the generation of dry ice in the loading pipe 30 and to smoothly operate the tank 21.

（２）第２の態様に係る船舶１は、（１）の船舶１であって、前記第二部分３２は、前記タンク２１の下端２１ｂに対し、下方から接続されている。 (2) The ship 1 according to the second aspect is the ship 1 of (1), in which the second portion 32 is connected to the lower end 21b of the tank 21 from below.

この船舶１において、積込配管３０の第二部分３２がタンク２１の下端２１ｂに対して下方から接続されている。そのため、例えば、積込配管３０を用いてタンク２１内の液化二酸化炭素Ｌをタンク２１から払い出す際に、液面Ｋｆの位置によっては、重力を利用することが可能となる。したがって、液化二酸化炭素を払い出すためのポンプ運転時間を短縮したり、より能力の低いポンプを使用したりすることが可能となり、その結果、省エネルギー化やポンプの小型化を図ることが可能となる。 In this ship 1, the second portion 32 of the loading pipe 30 is connected to the lower end 21b of the tank 21 from below. Therefore, for example, when discharging the liquefied carbon dioxide L in the tank 21 from the tank 21 using the loading pipe 30, it is possible to utilize gravity depending on the position of the liquid level Kf. Therefore, it is possible to shorten the pump operation time for pumping out liquefied carbon dioxide, or to use a pump with lower capacity, which results in energy savings and a smaller pump. .

（３）第３の態様に係る船舶１は、（２）の船舶１であって、前記タンク２１の前記下端２１ｂに接続される前記第二部分３２の管端３２ｔは、前記タンク２１の下端２１ｂにおける内周面２１ｆと上下方向で同じ高さに設けられている。 (3) The ship 1 according to the third aspect is the ship 1 according to (2), in which the pipe end 32t of the second portion 32 connected to the lower end 21b of the tank 21 is the lower end of the tank 21. It is provided at the same height in the vertical direction as the inner circumferential surface 21f of 21b.

この船舶１において、積込配管３０の第二部分３２の上端２１ｔを、タンク２１の下端２１ｂにおける内周面２１ｆと上下方向で同じ高さに設けることで、タンク２１内の液化二酸化炭素Ｌを払い出す際に、タンク２１内に残留する液化二酸化炭素Ｌの量を抑えることができる。 In this ship 1, by providing the upper end 21t of the second portion 32 of the loading pipe 30 at the same height in the vertical direction as the inner circumferential surface 21f at the lower end 21b of the tank 21, the liquefied carbon dioxide L in the tank 21 can be reduced. When discharging, the amount of liquefied carbon dioxide L remaining in the tank 21 can be suppressed.

１…船舶
２…船体
２ａ…船首
２ｂ…船尾
３Ａ、３Ｂ…舷側
５…甲板
５ｇ…挿通孔
５ｈ…開口部
６…下部甲板
７…上部構造
８…貨物搭載区画
２１、２１Ａ、２１Ｂ…タンク
２１ｂ…下端
２１ｆ…内周面
２１ｈ…連通開口
２１ｔ…上端
２２…サドル
３０…積込配管
３１…第一部分
３１ｊ…連結部
３２…第二部分
３２ａ…下方延伸部
３２ｂ…タンク下延伸部
３２ｃ…タンク接続部
３２ｔ…管端
１００…供給管
Ｄａ…船首尾方向
Ｄｖ…上下方向
Ｌ…液化二酸化炭素
Ｌｆ…液面
ｈ…高低差Δ 1... Vessel 2... Hull 2a... Bow 2b... Stern 3A, 3B... Broadside 5... Deck 5g... Insertion hole 5h... Opening 6... Lower deck 7... Superstructure 8... Cargo loading compartments 21, 21A, 21B... Tank 21b... Lower end 21f...Inner peripheral surface 21h...Communication opening 21t...Upper end 22...Saddle 30...Loading pipe 31...First portion 31j...Connecting portion 32...Second portion 32a...Downward extending portion 32b...Tank lower extending portion 32c...Tank connecting portion 32t...Tube end 100...Supply pipe Da...Fore and aft direction Dv...Vertical direction L...Liquefied carbon dioxide Lf...Liquid level h...Height difference Δ

Claims (3)

一対の舷側及び甲板を有する船体と、
前記船体に設けられると共に、前記甲板よりも上方の空間と下方の空間とに跨がるように設けられ、液化二酸化炭素を貯留可能なタンクと、
前記タンクの上端よりも下方に設けられ、船外から供給される液化二酸化炭素を前記タンク内に積み込む積込配管と、を備え、
前記積込配管は、
前記甲板上に延び、船外との連結部を有した第一部分と、
前記第一部分から下方に延び、前記甲板よりも上方の空間から前記甲板よりも下方の空間に至り、前記タンクの下端に接続された第二部分と、
を備える船舶。 a hull having a pair of sides and a deck;
a tank that is provided on the hull, is provided so as to straddle a space above and a space below the deck , and is capable of storing liquefied carbon dioxide;
A loading pipe provided below the upper end of the tank and loading liquefied carbon dioxide supplied from outside the vessel into the tank,
The loading pipe is
a first portion extending above the deck and having a connection portion with the outside of the ship;
a second part that extends downward from the first part, extends from a space above the deck to a space below the deck, and is connected to the lower end of the tank;
A ship equipped with 前記第二部分は、前記タンクの下端に対し、下方から接続されている
請求項１に記載の船舶。 The ship according to claim 1, wherein the second portion is connected to the lower end of the tank from below. 前記タンクの前記下端に接続される前記第二部分の管端は、前記タンクの下端における内周面と上下方向で同じ高さに設けられている
請求項２に記載の船舶。 The ship according to claim 2, wherein a pipe end of the second portion connected to the lower end of the tank is provided at the same height in the vertical direction as an inner circumferential surface at the lower end of the tank.
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