JP2022071535A - Transfer method of liquefied carbon dioxide and floating body - Google Patents

Transfer method of liquefied carbon dioxide and floating body Download PDF

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Publication number
JP2022071535A
JP2022071535A JP2020180560A JP2020180560A JP2022071535A JP 2022071535 A JP2022071535 A JP 2022071535A JP 2020180560 A JP2020180560 A JP 2020180560A JP 2020180560 A JP2020180560 A JP 2020180560A JP 2022071535 A JP2022071535 A JP 2022071535A
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pipe
carbon dioxide
tank
gas
liquefied carbon
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JP7365992B2 (en
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和也 安部
Kazuya Abe
晋介 森本
Shinsuke Morimoto
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Mitsubishi Shipbuilding Co Ltd
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Mitsubishi Shipbuilding Co Ltd
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Priority to JP2020180560A priority Critical patent/JP7365992B2/en
Priority to EP21886334.8A priority patent/EP4215798A4/en
Priority to CN202180072079.7A priority patent/CN116420044A/en
Priority to PCT/JP2021/039858 priority patent/WO2022092217A1/en
Priority to KR1020237013172A priority patent/KR20230070023A/en
Priority to AU2021371586A priority patent/AU2021371586A1/en
Publication of JP2022071535A publication Critical patent/JP2022071535A/en
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Publication of JP7365992B2 publication Critical patent/JP7365992B2/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 
    • 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
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied 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
    • F17C2201/01—Shape
    • F17C2201/0128—Shape spherical or elliptical
    • 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
    • F17C2201/0147—Shape complex
    • F17C2201/0157—Polygonal
    • 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
    • F17C2201/052—Size large (>1000 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
    • F17C2205/01—Mounting arrangements
    • F17C2205/0123—Mounting arrangements characterised by number of vessels
    • F17C2205/013—Two or more vessels
    • 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
    • F17C2205/0323—Valves
    • 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
    • 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
    • F17C2223/03—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
    • F17C2223/047—Localisation of the removal point in the liquid with a dip tube
    • 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
    • F17C2225/047—Localisation of the filling point in the liquid with a dip tube
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/04—Methods for emptying or filling
    • F17C2227/044—Methods for emptying or filling by purging
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/05—Improving chemical properties
    • F17C2260/053—Reducing corrosion
    • 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
    • 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
    • F17C2270/0118—Offshore

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

To suppress reaction of carbon dioxide and moisture upon transferring liquefied carbon dioxide, and efficiently load and unload liquefied carbon dioxide into a tank.SOLUTION: A transfer method of liquefied carbon dioxide comprises: connecting a connection pipe for connecting to an external facility arranged outside a floating body to a pipe that communicates with the inside of a tank provided in the floating body; sending replacement gas whose water content is adjusted to a predetermined upper limit or less to the inside of the connection pipe and the pipe, to replace the inside of the connection pipe and the pipe with the replacement gas; replacing the inside of the connection pipe and the pipe from the replacement gas to carbon dioxide gas; and transferring liquefied carbon dioxide between the external facility and the tank through the connection pipe and the pipe.SELECTED DRAWING: Figure 5

Description

本開示は、液化二酸化炭素の移載方法、浮体に関する。 The present disclosure relates to a transfer method of liquefied carbon dioxide and a floating body.

例えば特許文献１には、液化ガス（ＬＮＧ:Ｌｉｑｕｅｆｉｅｄ Ｎａｔｕｒａｌ Ｇａｓ）を貯蔵するタンクを備えた船舶（輸入船）から、陸上の設備（輸入ターミナル）に、液化ガスを移送するための移送装置（天然ガス移送装置）を備えた構成が開示されている。このような構成では、陸上の設備に係留された船舶は、設備と流体連通し、タンク内の液化ガスを陸上の貯蔵タンクに移送している。 For example, Patent Document 1 describes a transfer device (natural gas) for transferring liquefied gas from a ship (imported ship) equipped with a tank for storing liquefied gas (LNG: Liquid Natural Gas) to a facility on land (import terminal). A configuration with a gas transfer device) is disclosed. In such a configuration, the vessel moored at the onshore equipment communicates with the equipment and transfers the liquefied gas in the tank to the onshore storage tank.

特表２０１０－５０３１３２号公報Special Table 2010-503132 Publication No.

ところで、陸上の設備等の外部設備からタンクに液化ガスを積み込む際や、タンク内の液化ガスを外部設備に揚荷する際には、タンクの備える積込配管や揚荷配管等の配管は、外部設備と接続管を介して接続される。しかし、配管に接続管を接続するときに、配管内部に空気（大気）が侵入する可能性がある。そして、タンク内に液化二酸化炭素を収容する場合、配管内への空気侵入が生じると、空気中に含まれる水分と二酸化炭素とが反応し、炭酸やハイドレートが生成されてしまう。このように炭酸やハイドレートが生成されると、配管やタンクの内部に腐食が生じる可能性がある。 By the way, when loading liquefied gas from external equipment such as onshore equipment into the tank or when unloading liquefied gas in the tank to external equipment, the piping such as loading pipes and unloading pipes provided in the tank should be used. It is connected to external equipment via a connection pipe. However, when connecting the connecting pipe to the pipe, air (atmosphere) may enter the inside of the pipe. When liquefied carbon dioxide is contained in the tank, when air invades the pipe, the water contained in the air reacts with carbon dioxide to generate carbonic acid or hydrate. When carbonic acid or hydrate is generated in this way, corrosion may occur inside the piping or tank.

そのため、上記タンクの配管に接続管を接続した後、接続管内に二酸化炭素ガスを充填することが行われている。これにより、空気中に含まれる水分が液化二酸化炭素に直接接触することを抑えている。しかしながら、この場合も、二酸化炭素ガスを充填する際に、接続管内の空気に含まれる水分と二酸化炭素とが反応し、タンクや配管の内部に腐食が生じてしまう可能性がある。 Therefore, after connecting the connecting pipe to the pipe of the tank, the connecting pipe is filled with carbon dioxide gas. This prevents the moisture contained in the air from coming into direct contact with the liquefied carbon dioxide. However, even in this case, when the carbon dioxide gas is filled, the moisture contained in the air in the connecting pipe reacts with the carbon dioxide, and there is a possibility that the inside of the tank or the pipe is corroded.

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、液化二酸化炭素を移載する際に二酸化炭素と水分とが反応することを抑え、タンクや配管の内部に腐食が生じることが抑制できる液化二酸化炭素の移載方法、浮体を提供することを目的とする。 This disclosure is made in order to solve the above-mentioned problems, and suppresses the reaction between carbon dioxide and water when transferring liquefied carbon dioxide, and may cause corrosion inside tanks and pipes. It is an object of the present invention to provide a floating body and a transfer method of liquefied carbon dioxide that can be suppressed.

上記課題を解決するために、本開示に係る液化二酸化炭素の移載方法は、接続管を接続する工程と、置換ガスに置換する工程と、二酸化炭素ガスに置換する工程と、液化二酸化炭素を移載する工程と、を含む。前記接続管を接続する工程では、浮体に備えられたタンクの内部に連通する配管に前記接続管を接続する。前記接続管は、前記配管を前記浮体の外部に配置された外部設備と接続するためのものである。前記置換ガスに置換する工程では、前記接続管及び前記配管の内部に置換ガスを送り込み、前記接続管及び前記配管の内部を前記置換ガスに置換する。前記置換ガスは、水分量が所定の上限値以下に調整されている。前記二酸化炭素ガスに置換する工程では、前記接続管及び前記配管の内部を、前記置換ガスから二酸化炭素ガスに置換する。前記液化二酸化炭素を移載する工程では、前記接続管及び前記配管を通して、前記外部設備と前記タンクとの間で液化二酸化炭素を移載する。 In order to solve the above problems, the transfer method of liquefied carbon dioxide according to the present disclosure includes a step of connecting a connecting pipe, a step of replacing with a replacement gas, a step of replacing with carbon dioxide gas, and a step of replacing liquefied carbon dioxide. Including the process of transferring. In the step of connecting the connecting pipe, the connecting pipe is connected to a pipe communicating with the inside of the tank provided in the floating body. The connecting pipe is for connecting the pipe to an external facility arranged outside the floating body. In the step of replacing with the replacement gas, the replacement gas is sent into the connecting pipe and the inside of the pipe, and the inside of the connecting pipe and the pipe is replaced with the replacement gas. The water content of the replacement gas is adjusted to be equal to or less than a predetermined upper limit value. In the step of replacing with carbon dioxide gas, the connection pipe and the inside of the pipe are replaced with carbon dioxide gas from the replacement gas. In the step of transferring the liquefied carbon dioxide, the liquefied carbon dioxide is transferred between the external equipment and the tank through the connecting pipe and the pipe.

本開示に係る浮体は、浮体本体と、タンクと、配管と、置換ガス供給部と、二酸化炭素供給部と、を備える。前記タンクは、前記浮体本体に配置されている。前記タンクは、液化二酸化炭素を貯留可能である。前記配管は、前記タンク内に連通している。前記配管は、外部設備と前記タンクとの間で液化二酸化炭素を送給させるための接続管が接続可能とされている。前記置換ガス供給部は、前記接続管が前記配管に接続された場合に、前記配管及び前記接続管の内部に置換ガスを送り込む。置換ガスは、水分量が所定の上限値以下に調整されている。前記二酸化炭素供給部は、前記配管及び前記接続管の内部に二酸化炭素ガスを送り込む。 The floating body according to the present disclosure includes a floating body main body, a tank, piping, a replacement gas supply unit, and a carbon dioxide supply unit. The tank is arranged in the floating body body. The tank can store liquefied carbon dioxide. The pipe communicates with the inside of the tank. The pipe can be connected to a connecting pipe for supplying liquefied carbon dioxide between the external equipment and the tank. When the connecting pipe is connected to the pipe, the replacement gas supply unit sends the replacement gas into the pipe and the inside of the connecting pipe. The water content of the replacement gas is adjusted to be equal to or less than a predetermined upper limit value. The carbon dioxide supply unit sends carbon dioxide gas into the pipe and the connection pipe.

本開示の液化二酸化炭素の移載方法、浮体によれば、液化二酸化炭素を移載する際に二酸化炭素と水分とが反応することを抑え、タンクや配管の内部に腐食が生じることを抑制できる。 According to the transfer method and floating body of liquefied carbon dioxide of the present disclosure, it is possible to suppress the reaction between carbon dioxide and water when transferring liquefied carbon dioxide, and to suppress the occurrence of corrosion inside the tank or piping. ..

本開示の実施形態に係る浮体としての船舶の概略構成を示す平面図である。It is a top view which shows the schematic structure of the ship as a floating body which concerns on embodiment of this disclosure. 本開示の実施形態に係る船舶に設けられたタンク、配管を示す図であり、図１のＩ－Ｉ矢視断面図である。It is a figure which shows the tank and the pipe provided in the ship which concerns on embodiment of this disclosure, and is the cross-sectional view taken along the line I-I of FIG. 本開示の実施形態に係る船舶に設けられたタンク、配管を示す図であり、図１のＩＩ－ＩＩ矢視断面図である。It is a figure which shows the tank and the pipe provided in the ship which concerns on embodiment of this disclosure, and is the cross-sectional view taken along the line II-II of FIG. 本開示の実施形態に係る船舶と接続管で接続される外部設備を示す図である。It is a figure which shows the external equipment connected with the ship which concerns on embodiment of this disclosure by a connecting pipe. 本開示の実施形態に係る液化二酸化炭素の移載方法の手順を示すフローチャートである。It is a flowchart which shows the procedure of the transfer method of the liquefied carbon dioxide which concerns on embodiment of this disclosure. 本開示の実施形態に係る液化二酸化炭素の移載方法において、接続管を接続する工程を示す図である。It is a figure which shows the process of connecting a connecting pipe in the transfer method of liquefied carbon dioxide which concerns on embodiment of this disclosure. 本開示の実施形態に係る液化二酸化炭素の移載方法において、置換ガスに置換する工程を示す図である。It is a figure which shows the step of substituting with a substitution gas in the transfer method of liquefied carbon dioxide which concerns on embodiment of this disclosure. 本開示の実施形態に係る液化二酸化炭素の移載方法において、二酸化炭素ガスに置換する工程を示す図である。It is a figure which shows the step of substituting with carbon dioxide gas in the transfer method of liquefied carbon dioxide which concerns on embodiment of this disclosure. 本開示の実施形態に係る液化二酸化炭素の移載方法において、液化二酸化炭素を移載する工程を示す図である。It is a figure which shows the process of transferring the liquefied carbon dioxide in the transfer method of the liquefied carbon dioxide which concerns on embodiment of this disclosure.

以下、本開示の実施形態に係る浮体、液化二酸化炭素の移載方法について、図１～図９を参照して説明する。
（船舶の構成）
図１、図２に示すように、本開示の実施形態において、浮体である船舶１は、液化二酸化炭素を運搬する。この船舶１は、浮体本体としての船体２と、タンク設備１０と、置換ガス供給部２０（図２参照）と、二酸化炭素供給部３０（図２参照）と、を少なくとも備えている。 Hereinafter, the method of transferring the floating body and the liquefied carbon dioxide according to the embodiment of the present disclosure will be described with reference to FIGS. 1 to 9.
(Ship composition)
As shown in FIGS. 1 and 2, in the embodiment of the present disclosure, the floating vessel 1 carries liquefied carbon dioxide. The ship 1 includes at least a hull 2 as a floating body, a tank facility 10, a replacement gas supply unit 20 (see FIG. 2), and a carbon dioxide supply unit 30 (see FIG. 2).

（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４（図２参照）と、上甲板５と、を有している。舷側３Ａ，３Ｂは、船幅方向Ｄｗ両側の左右舷側をそれぞれ形成する一対の舷側外板を有する。船底４は、上下方向Ｄｖの下方に配置され、これら舷側３Ａ，３Ｂを接続する船底外板を有する。図２に示すように、これら一対の舷側３Ａ，３Ｂ及び船底４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上甲板５は、外部に露出する全通甲板である。船体２には、船尾２ｂ側の上甲板５上に、居住区を有する上部構造７が形成されている。 (Structure of hull)
The hull 2 has a pair of side sides 3A and 3B forming its outer shell, a ship bottom 4 (see FIG. 2), and an upper deck 5. The side 3A and 3B have a pair of side outer plates forming the left and right side on both sides of the ship width direction Dw. The ship bottom 4 is arranged below the vertical Dv and has a ship bottom outer plate connecting these side 3A and 3B. As shown in FIG. 2, due to the pair of side sides 3A and 3B and the bottom 4, the outer shell of the hull 2 has a U-shape in a cross section orthogonal to Da in the stern direction. The upper deck 5 exemplified in this embodiment is a whole deck exposed to the outside. In the hull 2, an upper structure 7 having a living area is formed on the upper deck 5 on the stern 2b side.

船体２内には、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、上甲板５に対して下方の船底に向けて凹み、上方に開口している。 In the hull 2, a cargo loading section (hold) 8 is formed on the bow 2a side of the upper structure 7. The cargo loading section 8 is recessed toward the bottom of the ship below the upper deck 5 and opens upward.

（タンク設備の構成）
タンク設備１０は、貨物搭載区画８内に、船首尾方向Ｄａに沿って、複数が配置されている。本開示の実施形態において、タンク設備１０は、船首尾方向Ｄａに間隔を空けて二個配置されている。 (Composition of tank equipment)
A plurality of tank facilities 10 are arranged in the cargo loading section 8 along the stern direction Da. In the embodiment of the present disclosure, two tank equipment 10s are arranged at intervals in the ship's tail direction Da.

図２、図３に示すように、タンク設備１０は、タンク１１と、配管１２と、を少なくとも備えている。
この実施形態において、タンク１１は、船体２に配置されている。タンク１１は、例えば、水平方向に延びる円筒状をなす。この実施形態において、タンク１１は、その長軸方向を船首尾方向Ｄａに沿わせて配置されている。タンク１１は、その内部に液化二酸化炭素Ｌを収容する。なお、タンク１１は、円筒状に限られるものではなく、タンク１１は球形、方形等であってもよい。 As shown in FIGS. 2 and 3, the tank equipment 10 includes at least a tank 11 and a pipe 12.
In this embodiment, the tank 11 is arranged on the hull 2. The tank 11 has, for example, a cylindrical shape extending in the horizontal direction. In this embodiment, the tank 11 is arranged along its major axis direction along the stern direction Da. The tank 11 contains the liquefied carbon dioxide L inside. The tank 11 is not limited to a cylindrical shape, and the tank 11 may be spherical, square, or the like.

配管１２は、積込配管１３と、揚荷配管１４と、を含んでいる。つまり、タンク設備１０の配管１２として、積込配管１３と揚荷配管１４との二種類が存在している。
図３に示すように、積込配管１３は、陸上の液化二酸化炭素供給設備等、船外の外部設備１００（図４参照）から供給される液化二酸化炭素Ｌをタンク１１内に積み込むための管路を形成している。積込配管１３のうち、その一端１３ａに近い側の一部は、タンク１１の頂部を貫通してタンク１１の外部から内部に延びている。積込配管１３の一端１３ａに近い側の部分は、タンク１１内で上下方向Ｄｖに延びている。積込配管１３の一端１３ａは、タンク１１の下部でタンク１１内に開口している。 The pipe 12 includes a loading pipe 13 and a unloading pipe 14. That is, there are two types of pipes 12 for the tank equipment 10, a loading pipe 13 and a unloading pipe 14.
As shown in FIG. 3, the loading pipe 13 is a pipe for loading the liquefied carbon dioxide L supplied from the outboard external equipment 100 (see FIG. 4) such as the onshore liquefied carbon dioxide supply equipment into the tank 11. Forming a road. A part of the loading pipe 13 on the side close to one end 13a penetrates the top of the tank 11 and extends from the outside to the inside of the tank 11. The portion of the loading pipe 13 near one end 13a extends in the vertical direction Dv in the tank 11. One end 13a of the loading pipe 13 is open in the tank 11 at the lower part of the tank 11.

積込配管１３の残部、すなわち他端１３ｂに近い側の部分は、タンク１１の外部に配置されている。図２に示すように、積込配管１３の他端１３ｂには、船外との連結部１３ｊが設けられている。連結部１３ｊは、例えば、フランジ等を有している。連結部１３ｊは、舷側３Ａ，３Ｂのいずれか一方（例えば、舷側３Ａ）に向けて配置されている。連結部１４ｊの開口は、通常時、蓋（図示無し）により閉塞されている。連結部１３ｊは、この蓋（図示無し）を取り外すことで、外部設備１００の設備側タンク１０１と接続するための接続管５０の端部を蓋（図示無し）に代えて接続することが可能となっている。 The remaining portion of the loading pipe 13, that is, the portion near the other end 13b is arranged outside the tank 11. As shown in FIG. 2, the other end 13b of the loading pipe 13 is provided with a connecting portion 13j with the outboard. The connecting portion 13j has, for example, a flange or the like. The connecting portion 13j is arranged toward either one of the side 3A and 3B (for example, the side 3A). The opening of the connecting portion 14j is normally closed by a lid (not shown). By removing this lid (not shown), the connecting portion 13j can connect the end of the connecting pipe 50 for connecting to the equipment side tank 101 of the external equipment 100 in place of the lid (not shown). It has become.

揚荷配管１４は、タンク１１内の液化二酸化炭素Ｌを、船外の外部設備１００に送出する。揚荷配管１４の一端１４ａに近い側の一部は、タンク１１の外部からタンク１１の頂部を貫通し、タンク１１の内部に延びている。揚荷配管１４の一端１４ａは、タンク１１内のうちの下部に配置されている。揚荷配管１４の一端１４ａには、ポンプ（図示無し）が設けられている。ポンプ（図示無し）は、タンク１１内の液化二酸化炭素Ｌを吸い込み、揚荷配管１４に送り出す。揚荷配管１４は、ポンプから送り出された液化二酸化炭素Ｌを、タンク１１外（船外）に導く。 The unloading pipe 14 sends the liquefied carbon dioxide L in the tank 11 to the external equipment 100 outside the ship. A part of the unloading pipe 14 near one end 14a penetrates the top of the tank 11 from the outside of the tank 11 and extends to the inside of the tank 11. One end 14a of the unloading pipe 14 is arranged in the lower part of the tank 11. A pump (not shown) is provided at one end 14a of the unloading pipe 14. The pump (not shown) sucks in the liquefied carbon dioxide L in the tank 11 and sends it out to the unloading pipe 14. The unloading pipe 14 guides the liquefied carbon dioxide L sent out from the pump to the outside of the tank 11 (outboard).

揚荷配管１４のうち、残部である他端１４ｂに近い側の部分は、タンク１１の外部に配置されている。図２に示すように、揚荷配管１４の他端１４ｂには、船外との連結部１４ｊが設けられている。連結部１４ｊは、例えば、フランジ等を有し、舷側３Ａ，３Ｂのいずれか一方（例えば舷側３Ａ）に向けて配置されている。連結部１４ｊの開口は、通常時、蓋（図示無し）により閉塞されている。連結部１４ｊは、この蓋（図示無し）を取り外すことで、外部設備１００の設備側タンク１０１と接続するための接続管５０の端部を蓋（図示無し）に代えて接続することが可能となっている。 The portion of the unloading pipe 14 on the side closer to the other end 14b, which is the remaining portion, is arranged outside the tank 11. As shown in FIG. 2, the other end 14b of the unloading pipe 14 is provided with a connecting portion 14j with the outboard. The connecting portion 14j has, for example, a flange or the like, and is arranged toward either one of the side 3A and 3B (for example, the side 3A). The opening of the connecting portion 14j is normally closed by a lid (not shown). By removing this lid (not shown), the connecting portion 14j can connect the end of the connecting pipe 50 for connecting to the equipment side tank 101 of the external equipment 100 in place of the lid (not shown). It has become.

図４に示すように、接続管５０は、外部設備１００からタンク１１内への液化二酸化炭素Ｌの積込を行う場合、外部設備１００の設備側タンク１０１に設けられた設備側配管１０２と、積込配管１３の連結部１３ｊとを、接続して連通させる。また、接続管５０は、タンク１１から外部設備１００への液化二酸化炭素Ｌの揚荷を行う場合、外部設備１００の設備側タンク１０１に設けられた設備側配管１０２と、揚荷配管１４の連結部１４ｊとを、接続して連通させる。以下の説明では、積込配管１３と揚荷配管１４とを区別する場合を除き、積込配管１３、揚荷配管１４を、単に配管１２と称し、連結部１３ｊ，１４ｊを、単に連結部１２ｊと称する。 As shown in FIG. 4, when the liquefied carbon dioxide L is loaded into the tank 11 from the external equipment 100, the connection pipe 50 includes the equipment side pipe 102 provided in the equipment side tank 101 of the external equipment 100 and the equipment side pipe 102. The connecting portion 13j of the loading pipe 13 is connected and communicated with the connecting portion 13j. Further, when the liquefied carbon dioxide L is unloaded from the tank 11 to the external equipment 100, the connection pipe 50 connects the equipment side pipe 102 provided in the equipment side tank 101 of the external equipment 100 and the unloading pipe 14. The unit 14j is connected and communicated with the unit 14j. In the following description, except for the case of distinguishing between the loading pipe 13 and the unloading pipe 14, the loading pipe 13 and the unloading pipe 14 are simply referred to as a pipe 12, and the connecting portions 13j and 14j are simply referred to as a connecting portion 12j. It is called.

配管１２、及び外部設備１００側の設備側配管１０２には、それぞれ、開閉弁１５，１０５が設けられている。開閉弁１５は、配管１２内の流路を開閉する。開閉弁１０５は、設備側配管１０２内の流路を開閉する。また、設備側配管１０２には、開放弁１０６が設けられている。開放弁１０６を開くと、設備側配管１０２内の流路と外部とが連通される。設備側配管１０２と配管１２とを接続管５０で接続した状態で、開閉弁１５，１０５を閉状態にすると、開閉弁１５と開閉弁１０５との間に位置する配管１２、接続管５０、及び設備側配管１０２の内部が設備側タンク１０１や、タンク１１と連通されない状態になる。ここで、設備側配管１０２内の流路が連通される外部とは、大気に限られない。例えば、開放弁１０６を介して放出される気体を貯留可能なタンク等の容器であってもよい。 On-off valves 15 and 105 are provided on the pipe 12 and the equipment-side pipe 102 on the external equipment 100 side, respectively. The on-off valve 15 opens and closes the flow path in the pipe 12. The on-off valve 105 opens and closes the flow path in the equipment-side piping 102. Further, the equipment side pipe 102 is provided with an open valve 106. When the release valve 106 is opened, the flow path in the equipment side piping 102 and the outside are communicated with each other. When the on-off valves 15 and 105 are closed while the equipment-side piping 102 and the piping 12 are connected by the connecting pipe 50, the piping 12, the connecting pipe 50, and the on-off valve located between the on-off valve 15 and the on-off valve 105 are closed. The inside of the equipment-side piping 102 is not communicated with the equipment-side tank 101 or the tank 11. Here, the outside through which the flow path in the equipment side pipe 102 is communicated is not limited to the atmosphere. For example, it may be a container such as a tank capable of storing the gas released through the release valve 106.

図２に示すように、置換ガス供給部２０は、外部設備１００と接続するための接続管５０が配管１２に接続された状態で、配管１２及び接続管５０の内部に、置換ガスＧａを送り込む。置換ガスＧａとしては、二酸化炭素と化学反応を生じない気体が用いられる。置換ガスＧａは、水分量が所定の上限値以下に調整されている。このような置換ガスＧａとしては、水分量が所定の上限値以下に調整された空気（いわゆるドライエア）や、窒素、アルゴン等の不活性ガスを用いることができる。この実施形態では、置換ガスＧａとしてドライエアを用いている。置換ガス供給部２０は、エアドライヤー２１を備えている。エアドライヤー２１は、外部から取り込んだ大気から水分を除去することで、水分量を、所定の上限値、例えば露点温度－４０℃以下に調整したドライエアを生成する。エアドライヤー２１は、置換ガス供給管２２を介して、配管１２に接続されている。置換ガス供給管２２には、開閉弁２３が設けられている。エアドライヤー２１で生成されたドライエアは、開閉弁２３を開状態とすることで、置換ガス供給管２２を通して、配管１２、接続管５０、及び設備側配管１０２の内部に送り込まれる。なお、ドライエアにおける水分量の上限値は、効率よく配管内の水分除去が可能な値であれば良く、予め実験等により求めることができる。 As shown in FIG. 2, the replacement gas supply unit 20 sends the replacement gas Ga into the pipe 12 and the connection pipe 50 in a state where the connection pipe 50 for connecting to the external equipment 100 is connected to the pipe 12. .. As the replacement gas Ga, a gas that does not chemically react with carbon dioxide is used. The water content of the replacement gas Ga is adjusted to be equal to or less than a predetermined upper limit value. As such a replacement gas Ga, air (so-called dry air) whose water content is adjusted to a predetermined upper limit or less, or an inert gas such as nitrogen or argon can be used. In this embodiment, dry air is used as the replacement gas Ga. The replacement gas supply unit 20 includes an air dryer 21. The air dryer 21 removes moisture from the atmosphere taken in from the outside to generate dry air whose moisture content is adjusted to a predetermined upper limit value, for example, a dew point temperature of −40 ° C. or lower. The air dryer 21 is connected to the pipe 12 via the replacement gas supply pipe 22. The replacement gas supply pipe 22 is provided with an on-off valve 23. The dry air generated by the air dryer 21 is sent into the pipe 12, the connection pipe 50, and the equipment side pipe 102 through the replacement gas supply pipe 22 by opening the on-off valve 23. The upper limit of the amount of water in the dry air may be a value that can efficiently remove the water in the pipe, and can be obtained in advance by an experiment or the like.

図２、図４に示すように、二酸化炭素供給部３０は、外部設備１００と接続するための接続管５０が配管１２に接続された状態で、配管１２、接続管５０、及び設備側配管１０２の内部に二酸化炭素ガスＧｃを送り込む。この実施形態では、二酸化炭素供給部３０は、二酸化炭素ガスＧｃとして、タンク１１内で液化二酸化炭素Ｌが気化することで生成されたボイルオフガスを用いている。二酸化炭素供給部３０は、ボイルオフガス送給管３１（図２、図３参照）を備えている。ボイルオフガス送給管３１は、タンク１１内の上部の気相と配管１２とを連通している。二酸化炭素供給部３０は、タンク１１から配管１２を通して、接続管５０、及び設備側配管１０２の内部にボイルオフガスを送り込む。 As shown in FIGS. 2 and 4, the carbon dioxide supply unit 30 has the pipe 12, the connection pipe 50, and the equipment side pipe 102 in a state where the connection pipe 50 for connecting to the external equipment 100 is connected to the pipe 12. Carbon dioxide gas Gc is sent into the inside of. In this embodiment, the carbon dioxide supply unit 30 uses the boil-off gas generated by the vaporization of the liquefied carbon dioxide L in the tank 11 as the carbon dioxide gas Gc. The carbon dioxide supply unit 30 includes a boil-off gas supply pipe 31 (see FIGS. 2 and 3). The boil-off gas supply pipe 31 communicates the upper gas phase in the tank 11 with the pipe 12. The carbon dioxide supply unit 30 sends the boil-off gas from the tank 11 through the pipe 12 to the inside of the connection pipe 50 and the equipment side pipe 102.

（液化二酸化炭素の移送方法の手順）
図５に示すように、この実施形態に係る液化二酸化炭素Ｌの移載方法Ｓ１０は、接続管５０を接続する工程Ｓ１１と、置換ガスＧａに置換する工程Ｓ１２と、二酸化炭素ガスＧｃに置換する工程Ｓ１３と、液化二酸化炭素Ｌを移載する工程Ｓ１４と、を含んでいる。 (Procedure of transfer method of liquefied carbon dioxide)
As shown in FIG. 5, the transfer method S10 of the liquefied carbon dioxide L according to this embodiment is replaced with the step S11 for connecting the connecting pipe 50, the step S12 for replacing with the replacement gas Ga, and the carbon dioxide gas Gc. A step S13 and a step S14 for transferring the liquefied carbon dioxide L are included.

接続管５０を接続する工程Ｓ１１では、図６に示すように、配管１２に、外部設備１００と接続するための接続管５０の一端を接続する。さらに、外部設備１００の設備側配管１０２に接続管５０の他端を接続する。このとき、開閉弁１５，２３，１０５，開放弁１０６を閉状態にしておく。この状態で、開閉弁１５と開閉弁１０５との間に位置する、配管１２、接続管５０、及び設備側配管１０２の内部には、大気が入っている。 In the step S11 for connecting the connection pipe 50, as shown in FIG. 6, one end of the connection pipe 50 for connecting to the external equipment 100 is connected to the pipe 12. Further, the other end of the connecting pipe 50 is connected to the equipment side pipe 102 of the external equipment 100. At this time, the on-off valves 15, 23, 105 and the open valve 106 are kept closed. In this state, the atmosphere is contained in the pipe 12, the connection pipe 50, and the equipment side pipe 102 located between the on-off valve 15 and the on-off valve 105.

置換ガスＧａに置換する工程Ｓ１２では、図７に示すように、置換ガス供給部２０により、接続管５０の内部に置換ガスＧａを送り込む。これには、エアドライヤー２１を作動させるとともに、開閉弁１５，１０５を閉状態、開閉弁２３及び開放弁１０６を開状態とする。エアドライヤー２１で外部から取り込まれた空気（大気）中の水分を除去することで、水分量が所定の上限値以下に調整されたドライエアが生成され、このドライエアが置換ガスＧａとなる。この置換ガスＧａは、置換ガス供給管２２を通して配管１２の連結部１２ｊに供給される。供給された置換ガスＧａは、配管１２から接続管５０、設備側配管１０２へと流れて、配管１２、接続管５０、及び設備側配管１０２の内部の空気を、開放弁１０６から順次外部に押し出す。開放弁１０６から排出される空気の露点を計測し、露点が予め設定した許容値範囲内に入るまで、置換ガスＧａの送り込みを継続する。計測される露点が許容値範囲内に入ったら、置換ガス供給部２０による置換ガスＧａの送り込みを停止し、開放弁１０６、開閉弁２３を閉状態とする。これにより、開閉弁１５，１０５の間における配管１２、接続管５０、及び設備側配管１０２の内部が置換ガスＧａに置換される。 In the step S12 of substituting with the replacement gas Ga, as shown in FIG. 7, the replacement gas Ga is sent into the inside of the connecting pipe 50 by the replacement gas supply unit 20. To do this, the air dryer 21 is operated, and the on-off valves 15 and 105 are closed, and the on-off valve 23 and the open valve 106 are opened. By removing the moisture in the air (atmosphere) taken in from the outside by the air dryer 21, dry air whose moisture content is adjusted to be equal to or less than a predetermined upper limit is generated, and this dry air becomes the replacement gas Ga. This replacement gas Ga is supplied to the connecting portion 12j of the pipe 12 through the replacement gas supply pipe 22. The supplied replacement gas Ga flows from the pipe 12 to the connection pipe 50 and the equipment side pipe 102, and sequentially pushes the air inside the pipe 12, the connection pipe 50, and the equipment side pipe 102 to the outside from the release valve 106. .. The dew point of the air discharged from the release valve 106 is measured, and the replacement gas Ga is continuously fed until the dew point falls within the preset allowable value range. When the measured dew point is within the permissible value range, the feeding of the replacement gas Ga by the replacement gas supply unit 20 is stopped, and the open valve 106 and the on-off valve 23 are closed. As a result, the inside of the pipe 12, the connecting pipe 50, and the equipment side pipe 102 between the on-off valves 15 and 105 is replaced with the replacement gas Ga.

二酸化炭素ガスＧｃに置換する工程Ｓ１３では、接続管５０の内部を、置換ガスＧａから二酸化炭素ガスＧｃに置換する。これには、図８に示すように、開閉弁１５、１０５を開状態、開放弁１０６及び開閉弁２３を閉状態とする。この状態で、二酸化炭素供給部３０及び配管１２を通し、接続管５０、及び設備側配管１０２の内部にタンク１１のボイルオフガスを二酸化炭素ガスＧｃとして送り込む。これにより、配管１２、接続管５０、及び設備側配管１０２の内部の置換ガスＧａ（ドライエア）が、外部設備１００側に順次押し出されていく。外部設備１００側では、接続管５０側から押し出されてくる置換ガスＧａと二酸化炭素ガスＧｃの混合気の二酸化炭素濃度を計測する。計測された二酸化炭素濃度が予め設定した濃度範囲内に入ったら、二酸化炭素供給部３０による二酸化炭素ガスＧｃの供給を停止する。 In the step S13 of replacing with carbon dioxide gas Gc, the inside of the connecting pipe 50 is replaced with carbon dioxide gas Gc from the replacement gas Ga. For this purpose, as shown in FIG. 8, the on-off valves 15 and 105 are in the open state, and the open valve 106 and the on-off valve 23 are in the closed state. In this state, the boil-off gas of the tank 11 is sent as carbon dioxide gas Gc into the connection pipe 50 and the equipment side pipe 102 through the carbon dioxide supply unit 30 and the pipe 12. As a result, the replacement gas Ga (dry air) inside the pipe 12, the connecting pipe 50, and the equipment side pipe 102 is sequentially pushed out to the external equipment 100 side. On the external equipment 100 side, the carbon dioxide concentration of the mixture of the replacement gas Ga and the carbon dioxide gas Gc extruded from the connecting pipe 50 side is measured. When the measured carbon dioxide concentration falls within the preset concentration range, the supply of carbon dioxide gas Gc by the carbon dioxide supply unit 30 is stopped.

液化二酸化炭素Ｌを移載する工程Ｓ１４では、図９に示すように、接続管５０及び配管１２を通して、外部設備１００とタンク１１との間で液化二酸化炭素Ｌを移載する。例えば、外部設備１００からタンク１１内への液化二酸化炭素Ｌの積込を行う場合、外部設備１００の設備側タンク１０１から、設備側配管１０２、接続管５０、配管１２（積込配管１３）を通して、タンク１１内に液化二酸化炭素Ｌを送り込む。
また、タンク１１内から外部設備１００への液化二酸化炭素Ｌの揚荷を行う場合、配管１２（揚荷配管１４）から、接続管５０、設備側配管１０２を通して、外部設備１００の設備側タンク１０１に液化二酸化炭素Ｌを送り込む。 In the step S14 for transferring the liquefied carbon dioxide L, as shown in FIG. 9, the liquefied carbon dioxide L is transferred between the external equipment 100 and the tank 11 through the connecting pipe 50 and the pipe 12. For example, when loading the liquefied carbon dioxide L from the external equipment 100 into the tank 11, the equipment side tank 101 of the external equipment 100 passes through the equipment side pipe 102, the connection pipe 50, and the pipe 12 (loading pipe 13). , Liquefied carbon dioxide L is sent into the tank 11.
Further, when unloading the liquefied carbon dioxide L from the inside of the tank 11 to the external equipment 100, the equipment side tank 101 of the external equipment 100 is loaded from the pipe 12 (unloading pipe 14) through the connection pipe 50 and the equipment side pipe 102. L. L of liquefied carbon dioxide is sent to.

（作用効果）
上記実施形態の液化二酸化炭素の移載方法Ｓ１０によれば、接続管５０及び配管１２の内部を置換ガスＧａに置換した後、さらに二酸化炭素ガスＧｃに置換している。置換ガスＧａは、水分量が所定の上限値以下に調整されているため、置換ガスＧａは、水分量が所定の上限値以下に調整されている。これにより、置換ガスＧａから二酸化炭素ガスＧｃに置換したときに、二酸化炭素ガスＧｃが水分と反応することを抑えられる。接続管５０及び配管１２の内部を二酸化炭素ガスＧｃに置換した後、外部設備１００とタンク１１との間で移載される液化二酸化炭素Ｌが接続管５０及び配管１２の内部に流れるので、このときにも二酸化炭素ガスＧｃと水分との反応の発生が抑制される。したがって、液化二酸化炭素Ｌを移載する際に二酸化炭素と水分とが反応することを抑え、タンク１１や配管１２の内部に腐食が生じることが抑制できる。 (Action effect)
According to the method S10 for transferring liquefied carbon dioxide of the above embodiment, the insides of the connecting pipe 50 and the pipe 12 are replaced with the replacement gas Ga, and then further replaced with the carbon dioxide gas Gc. Since the water content of the replacement gas Ga is adjusted to be equal to or less than a predetermined upper limit value, the water content of the replacement gas Ga is adjusted to be equal to or less than a predetermined upper limit value. As a result, it is possible to suppress the reaction of the carbon dioxide gas Gc with water when the replacement gas Ga is replaced with the carbon dioxide gas Gc. After replacing the inside of the connecting pipe 50 and the pipe 12 with carbon dioxide gas Gc, the liquefied carbon dioxide L transferred between the external equipment 100 and the tank 11 flows into the connecting pipe 50 and the pipe 12, so that this Occasionally, the occurrence of a reaction between carbon dioxide gas Gc and water is suppressed. Therefore, it is possible to suppress the reaction between carbon dioxide and water when the liquefied carbon dioxide L is transferred, and to suppress the occurrence of corrosion inside the tank 11 and the pipe 12.

また、置換ガスＧａは、水分量が所定の上限値以下に調整されたドライエアである。置換ガスＧａとして用いられるドライエアは、空気（大気）をエアドライヤー２１で乾燥させることで生成できる。したがって、船舶１上において、ドライエアを容易に用意することが可能となる。 Further, the replacement gas Ga is dry air whose water content is adjusted to be equal to or less than a predetermined upper limit value. The dry air used as the replacement gas Ga can be generated by drying the air (atmosphere) with the air dryer 21. Therefore, it is possible to easily prepare dry air on the ship 1.

また、二酸化炭素ガスＧｃは、タンク１１内に貯留された液化二酸化炭素Ｌが気化することで生成されたボイルオフガスである。これにより、船舶１上において、二酸化炭素ガスＧｃを容易に入手することが可能となる。 Further, the carbon dioxide gas Gc is a boil-off gas generated by vaporizing the liquefied carbon dioxide L stored in the tank 11. This makes it possible to easily obtain carbon dioxide gas Gc on the ship 1.

上記実施形態の船舶１では、外部設備１００と接続するための接続管５０が配管１２に接続された場合に、置換ガス供給部２０で、接続管５０及び配管１２の内部に、水分量が所定の上限値以下に調整された置換ガスＧａを送り込む。これにより、接続管５０及び配管１２の内部を置換ガスＧａに置換することができる。さらに、二酸化炭素供給部３０で、接続管５０及び配管１２の内部に二酸化炭素ガスＧｃを送り込むことで、接続管５０及び配管１２の内部を、置換ガスＧａから二酸化炭素ガスＧｃに置換することができる。この後に、接続管５０及び配管１２を通して、外部設備１００とタンク１１との間で液化二酸化炭素Ｌを移載することによって、液化二酸化炭素Ｌを移載する際に二酸化炭素と水分とが反応することを抑え、タンク１１や配管１２の内部に腐食が生じることが抑制できる。 In the ship 1 of the above embodiment, when the connection pipe 50 for connecting to the external equipment 100 is connected to the pipe 12, the replacement gas supply unit 20 determines the amount of water inside the connection pipe 50 and the pipe 12. The replacement gas Ga adjusted to be equal to or less than the upper limit of is sent. As a result, the inside of the connecting pipe 50 and the pipe 12 can be replaced with the replacement gas Ga. Further, the carbon dioxide supply unit 30 can replace the inside of the connection pipe 50 and the pipe 12 with the carbon dioxide gas Gc from the replacement gas Ga by sending the carbon dioxide gas Gc into the connection pipe 50 and the pipe 12. can. After that, by transferring the liquefied carbon dioxide L between the external equipment 100 and the tank 11 through the connecting pipe 50 and the pipe 12, the carbon dioxide and the water react when the liquefied carbon dioxide L is transferred. This can be suppressed and corrosion can be suppressed inside the tank 11 and the pipe 12.

また、上記船舶１は、エアドライヤー２１を備えている。これにより、エアドライヤー２１で、外部から取り込んだ大気（空気）を乾燥させることで、置換ガスＧａとして、水分量が所定の上限値以下に調整されたドライエアを提供することができる。これにより、船舶１上において、水分量が所定の上限値以下に調整された置換ガスＧａを容易に入手することが可能となる。 Further, the ship 1 is provided with an air dryer 21. Thereby, by drying the atmosphere (air) taken in from the outside by the air dryer 21, it is possible to provide the dry air whose water content is adjusted to be equal to or less than a predetermined upper limit value as the replacement gas Ga. As a result, it becomes possible to easily obtain the replacement gas Ga whose water content is adjusted to be equal to or less than a predetermined upper limit value on the ship 1.

また、上記船舶１は、タンク１１内に貯留された液化二酸化炭素Ｌが気化することで生成されたボイルオフガスを、二酸化炭素ガスＧｃとして配管１２及び接続管５０の内部に送り込む。これにより、船舶１上において、二酸化炭素ガスＧｃを容易に入手することが可能となる。 Further, the ship 1 sends the boil-off gas generated by the vaporization of the liquefied carbon dioxide L stored in the tank 11 into the pipe 12 and the connecting pipe 50 as carbon dioxide gas Gc. This makes it possible to easily obtain carbon dioxide gas Gc on the ship 1.

（その他の実施形態）
以上、本開示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、配管１２の連結部１２ｊとして、積込配管１３の連結部１３ｊと、揚荷配管１４の連結部１４ｊとを個別に備えるようにしたが、これに限るものではない。例えば、積込配管１３と揚荷配管１４を、他端１３ｂ、１４ｂ側で一本の配管１２に接続し、連結部１２ｊを、積込配管１３と揚荷配管１４で共用するようにしてもよい。 (Other embodiments)
Although the embodiment of the present disclosure has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and includes design changes and the like within a range not deviating from the gist of the present disclosure. ..
In the above embodiment, as the connecting portion 12j of the pipe 12, the connecting portion 13j of the loading pipe 13 and the connecting portion 14j of the unloading pipe 14 are individually provided, but the present invention is not limited to this. For example, the loading pipe 13 and the unloading pipe 14 may be connected to one pipe 12 on the other ends 13b and 14b sides, and the connecting portion 12j may be shared by the loading pipe 13 and the unloading pipe 14. good.

また、上記実施形態では、船舶１と、陸上に設置された外部設備１００との間で、液化二酸化炭素Ｌを移載するようにしたが、これに限られない。船舶１と、洋上に配置され、推進機構を備えない洋上浮体設備との間で、液化二酸化炭素Ｌを移載するようにしてもよい。この場合、洋上浮体設備が、船舶１から見て、外部設備１００に相当する。 Further, in the above embodiment, the liquefied carbon dioxide L is transferred between the ship 1 and the external equipment 100 installed on land, but the present invention is not limited to this. The liquefied carbon dioxide L may be transferred between the ship 1 and the offshore floating body equipment which is arranged at sea and does not have a propulsion mechanism. In this case, the offshore floating equipment corresponds to the external equipment 100 when viewed from the ship 1.

上記実施形態では、二酸化炭素ガスＧｃとして、タンク１１内で液化二酸化炭素Ｌが気化することで生成されたボイルオフガスを用いていたが、二酸化炭素ガスＧｃは、ボイルオフガス以外に、例えば、同一船上や船外の別容器に収容された二酸化炭素ガス等であってもよい。
さらに、上記実施形態の船舶１では、二つのタンク１１を備える構成としたが、タンク１１の個数や配置はこれに限られない。三つ以上のタンク１１を備えていてもよい。また、上記実施形態では、複数のタンク１１を船首尾方向Ｄａに並べて配置する場合を例示したが、タンク１１は、船幅方向（言い換えれば、左右舷方向）に並べて配置してもよい。
また、上記実施形態では、浮体として船舶１を例示したが、これに限られない。浮体は、推進機構を備えない洋上浮体設備であってもよい。浮体が、洋上浮体設備である場合、洋上浮体設備から見た外部設備１００が、船舶となることもある。 In the above embodiment, as the carbon dioxide gas Gc, a boil-off gas generated by vaporization of the liquefied carbon dioxide L in the tank 11 is used, but the carbon dioxide gas Gc is, for example, on the same ship other than the boil-off gas. It may be carbon dioxide gas or the like contained in another container outside the ship.
Further, although the ship 1 of the above embodiment is configured to include two tanks 11, the number and arrangement of the tanks 11 are not limited to this. It may be provided with three or more tanks 11. Further, in the above embodiment, the case where a plurality of tanks 11 are arranged side by side in the bow tail direction Da is illustrated, but the tanks 11 may be arranged side by side in the ship width direction (in other words, the port side direction).
Further, in the above embodiment, the ship 1 is exemplified as a floating body, but the present invention is not limited to this. The floating body may be an offshore floating body facility without a propulsion mechanism. When the floating body is an offshore floating body equipment, the external equipment 100 seen from the offshore floating body equipment may be a ship.

＜付記＞
各実施形態に記載の液化二酸化炭素Ｌの移載方法Ｓ１０、浮体１は、例えば以下のように把握される。 <Additional Notes>
The transfer method S10 and the floating body 1 of the liquefied carbon dioxide L according to each embodiment are grasped as follows, for example.

（１）第１の態様に係る液化二酸化炭素Ｌの移載方法Ｓ１０は、浮体１に備えられたタンク１１の内部に連通する配管１２に、前記浮体１の外部に配置された外部設備１００と接続するための接続管５０を接続する工程Ｓ１１と、前記接続管５０及び前記配管１２の内部に、水分量が所定の上限値以下に調整された置換ガスＧａを送り込み、前記接続管５０及び前記配管１２の内部を前記置換ガスＧａに置換する工程Ｓ１２と、前記接続管５０及び前記配管１２の内部を、前記置換ガスＧａから二酸化炭素ガスＧｃに置換する工程Ｓ１３と、前記接続管５０及び前記配管１２を通して、前記外部設備１００と前記タンク１１との間で液化二酸化炭素Ｌを移載する工程Ｓ１４と、を含む。
浮体１の例としては、船舶や洋上浮体設備が挙げられる。浮体本体２の例としては、船体や洋上浮体設備の浮体本体２が挙げられる。
置換ガスＧａの例としては、例えば、ドライエア、不活性ガスが挙げられる。 (1) The method S10 for transferring the liquefied carbon dioxide L according to the first aspect is to connect the pipe 12 communicating with the inside of the tank 11 provided in the floating body 1 with the external equipment 100 arranged outside the floating body 1. The replacement gas Ga whose water content is adjusted to a predetermined upper limit or less is sent into the connection pipe 50 and the inside of the connection pipe 50 and the connection pipe 12 in the step S11 for connecting the connection pipe 50 for connection. A step S12 for replacing the inside of the pipe 12 with the replacement gas Ga, a step S13 for replacing the inside of the connecting pipe 50 and the pipe 12 with the carbon dioxide gas Gc from the replacement gas Ga, and the connecting pipe 50 and the above. A step S14 of transferring the liquefied carbon dioxide L between the external equipment 100 and the tank 11 through the pipe 12 is included.
Examples of the floating body 1 include ships and offshore floating body equipment. Examples of the floating body 2 include a floating body 2 of a hull and offshore floating equipment.
Examples of the replacement gas Ga include dry air and an inert gas.

この液化二酸化炭素Ｌの移載方法Ｓ１０によれば、接続管５０及び配管１２の内部を置換ガスＧａに置換した後、さらに二酸化炭素ガスＧｃに置換している。置換ガスＧａは、水分量が所定の上限値以下に調整されているため、置換ガスＧａから二酸化炭素ガスＧｃに置換したときに、二酸化炭素が水分と反応することが抑えられる。接続管５０及び配管１２の内部を二酸化炭素ガスＧｃに置換した後、外部設備１００とタンク１１との間で移載される液化二酸化炭素Ｌが接続管５０及び配管１２の内部に流れるので、このときにも二酸化炭素と水分との反応の発生が抑制される。したがって、液化二酸化炭素Ｌを移載する際に二酸化炭素と水分とが反応することを抑え、タンク１１や配管１２の内部に腐食が生じることが抑制できる。 According to the transfer method S10 of the liquefied carbon dioxide L, the insides of the connecting pipe 50 and the pipe 12 are replaced with the replacement gas Ga, and then further replaced with the carbon dioxide gas Gc. Since the water content of the replacement gas Ga is adjusted to be equal to or lower than a predetermined upper limit value, it is possible to suppress the reaction of carbon dioxide with water when the replacement gas Ga is replaced with the carbon dioxide gas Gc. After replacing the inside of the connecting pipe 50 and the pipe 12 with carbon dioxide gas Gc, the liquefied carbon dioxide L transferred between the external equipment 100 and the tank 11 flows into the connecting pipe 50 and the pipe 12, so that this Occasionally, the occurrence of a reaction between carbon dioxide and water is suppressed. Therefore, it is possible to suppress the reaction between carbon dioxide and water when the liquefied carbon dioxide L is transferred, and to suppress the occurrence of corrosion inside the tank 11 and the pipe 12.

（２）第２の態様に係る液化二酸化炭素Ｌの移載方法Ｓ１０は、（１）の液化二酸化炭素Ｌの移載方法Ｓ１０であって、前記置換ガスＧａは、水分量が所定の上限値以下に調整されたドライエアである。 (2) The method S10 for transferring the liquefied carbon dioxide L according to the second aspect is the method S10 for transferring the liquefied carbon dioxide L according to (1), and the water content of the replacement gas Ga is a predetermined upper limit value. The dry air adjusted below.

これにより、置換ガスＧａとして用いられるドライエアは、空気（大気）をエアドライヤーで乾燥させることで生成できる。したがって、浮体１上において、ドライエアを容易に用意することが可能となる。 Thereby, the dry air used as the replacement gas Ga can be generated by drying the air (atmosphere) with an air dryer. Therefore, it is possible to easily prepare dry air on the floating body 1.

（３）第３の態様に係る液化二酸化炭素Ｌの移載方法Ｓ１０は、（１）又は（２）の液化二酸化炭素Ｌの移載方法Ｓ１０であって、前記二酸化炭素ガスＧｃは、前記タンク１１内に貯留された液化二酸化炭素Ｌが気化することで生成されたボイルオフガスである。 (3) The method S10 for transferring the liquefied carbon dioxide L according to the third aspect is the method S10 for transferring the liquefied carbon dioxide L according to (1) or (2), and the carbon dioxide gas Gc is the tank. It is a boil-off gas produced by vaporizing the liquefied carbon dioxide L stored in 11.

これにより、浮体１上において、二酸化炭素ガスＧｃを容易に入手することが可能となる。 This makes it possible to easily obtain carbon dioxide gas Gc on the floating body 1.

（４）第４の態様に係る浮体１は、浮体本体２と、前記浮体本体２に配置され、液化二酸化炭素Ｌを貯留可能なタンク１１と、前記タンク１１内に連通し、外部設備１００と前記タンク１１との間で液化二酸化炭素Ｌを送給させるための接続管５０が接続可能とされた配管１２と、前記接続管５０が前記配管１２に接続された場合に、前記配管１２及び前記接続管５０の内部に、水分量が所定の上限値以下に調整された置換ガスＧａを送り込む置換ガス供給部２０と、前記配管１２及び前記接続管５０の内部に二酸化炭素ガスＧｃを送り込む二酸化炭素供給部３０と、を備える。 (4) The floating body 1 according to the fourth aspect communicates with the floating body main body 2, the tank 11 arranged in the floating body main body 2 and capable of storing liquefied carbon dioxide L, and the external equipment 100. A pipe 12 to which a connecting pipe 50 for supplying liquefied carbon dioxide L to be supplied to and from the tank 11 can be connected, and when the connecting pipe 50 is connected to the pipe 12, the pipe 12 and the above. A replacement gas supply unit 20 that sends a replacement gas Ga whose water content is adjusted to a predetermined upper limit or less inside the connection pipe 50, and carbon dioxide that sends carbon dioxide gas Gc into the pipe 12 and the connection pipe 50. A supply unit 30 is provided.

このような浮体１では、置換ガス供給部２０で、接続管５０及び配管１２の内部に、水分量が所定の上限値以下に調整された置換ガスＧａを送り込むことで、接続管５０及び配管１２の内部を置換ガスＧａに置換することができる。さらに、二酸化炭素供給部３０で、接続管５０及び配管１２の内部に二酸化炭素ガスＧｃを送り込むことで、接続管５０及び配管１２の内部を、置換ガスＧａから二酸化炭素ガスＧｃに置換することができる。この後に、接続管５０及び配管１２を通して、外部設備１００とタンク１１との間で液化二酸化炭素Ｌを移載することによって、液化二酸化炭素Ｌを移載する際に二酸化炭素と水分とが反応することを抑え、タンク１１や配管１２の内部に腐食が生じることが抑制できる。 In such a floating body 1, the replacement gas supply unit 20 sends the replacement gas Ga whose water content is adjusted to a predetermined upper limit or less into the connection pipe 50 and the pipe 12, thereby sending the replacement gas Ga to the connection pipe 50 and the pipe 12. The inside of the gas can be replaced with the replacement gas Ga. Further, the carbon dioxide supply unit 30 can replace the inside of the connection pipe 50 and the pipe 12 with the carbon dioxide gas Gc from the replacement gas Ga by sending the carbon dioxide gas Gc into the connection pipe 50 and the pipe 12. can. After that, by transferring the liquefied carbon dioxide L between the external equipment 100 and the tank 11 through the connecting pipe 50 and the pipe 12, the carbon dioxide and the water react when the liquefied carbon dioxide L is transferred. This can be suppressed and corrosion can be suppressed inside the tank 11 and the pipe 12.

（５）第５の態様に係る浮体１は、（４）の浮体１であって、前記置換ガス供給部２０は、外部から取り込んだ大気に含まれる水分を低減させるエアドライヤー２１を備えている。 (5) The floating body 1 according to the fifth aspect is the floating body 1 of (4), and the replacement gas supply unit 20 includes an air dryer 21 for reducing the moisture contained in the atmosphere taken in from the outside. ..

これにより、エアドライヤー２１により、外部から取り込んだ大気に含まれる水分を低減させることで、ドライエアを水分量が所定の上限値以下に調整された置換ガスＧａとして提供することができる。 Thereby, by reducing the moisture contained in the atmosphere taken in from the outside by the air dryer 21, the dry air can be provided as the replacement gas Ga whose moisture content is adjusted to be equal to or less than a predetermined upper limit value.

（６）第６の態様に係る浮体１は、（４）又は（５）の浮体１であって、前記二酸化炭素供給部３０は、前記タンク１１内に貯留された液化二酸化炭素Ｌが気化することで生成されたボイルオフガスを、前記二酸化炭素ガスＧｃとして前記配管１２及び前記接続管５０の内部に送り込む。 (6) The floating body 1 according to the sixth aspect is the floating body 1 of (4) or (5), and the carbon dioxide supply unit 30 vaporizes the liquefied carbon dioxide L stored in the tank 11. The boil-off gas thus generated is sent into the pipe 12 and the connection pipe 50 as the carbon dioxide gas Gc.

これにより、ボイルオフガスを二酸化炭素ガスＧｃとして用いることで、浮体１上において、二酸化炭素ガスＧｃを容易に入手することが可能となる。 Thereby, by using the boil-off gas as the carbon dioxide gas Gc, the carbon dioxide gas Gc can be easily obtained on the floating body 1.

１…船舶（浮体）
２…船体（浮体本体）
２ａ…船首
２ｂ…船尾
３Ａ、３Ｂ…舷側
４…船底
５…上甲板
７…上部構造
８…貨物搭載区画
１０…タンク設備
１１…タンク
１２…配管
１２ｊ…連結部
１３…積込配管
１３ａ…一端
１３ｂ…他端
１３ｊ…連結部
１４…揚荷配管
１４ａ…一端
１４ｂ…他端
１４ｊ…連結部
１５…開閉弁
２０…置換ガス供給部
２１…エアドライヤー
２２…置換ガス供給管
２３…開閉弁
３０…二酸化炭素供給部
５０…接続管
１００…外部設備
１０１…設備側タンク
１０２…設備側配管
１０５…開閉弁
１０６…開放弁
Ｇａ…置換ガス
Ｇｃ…二酸化炭素ガス
Ｌ…液化二酸化炭素 1 ... Ship (floating body)
2 ... Hull (floating body)
2a ... Ship nose 2b ... Stern 3A, 3B ... Side 4 ... Ship bottom 5 ... Upper deck 7 ... Upper structure 8 ... Cargo loading section 10 ... Tank equipment 11 ... Tank 12 ... Piping 12j ... Connecting part 13 ... Loading pipe 13a ... One end 13b The other end 13j ... Connecting part 14 ... Lifting pipe 14a ... One end 14b ... The other end 14j ... Connecting part 15 ... On-off valve 20 ... Replacement gas supply part 21 ... Air dryer 22 ... Replacement gas supply pipe 23 ... On-off valve 30 ... Dioxide Carbon supply unit 50 ... Connection pipe 100 ... External equipment 101 ... Equipment side tank 102 ... Equipment side piping 105 ... On-off valve 106 ... Open valve Ga ... Replacement gas Gc ... Carbon dioxide gas L ... Liquefied carbon dioxide

Claims (6)

浮体に備えられたタンクの内部に連通する配管に、前記浮体の外部に配置された外部設備と接続するための接続管を接続する工程と、
前記接続管及び前記配管の内部に、水分量が所定の上限値以下に調整された置換ガスを送り込み、前記接続管及び前記配管の内部を前記置換ガスに置換する工程と、
前記接続管及び前記配管の内部を、前記置換ガスから二酸化炭素ガスに置換する工程と、
前記接続管及び前記配管を通して、前記外部設備と前記タンクとの間で液化二酸化炭素を移載する工程と、を含む
液化二酸化炭素の移載方法。 A process of connecting a connecting pipe for connecting to an external facility arranged outside the floating body to a pipe communicating with the inside of the tank provided in the floating body.
A step of sending a replacement gas whose water content is adjusted to a predetermined upper limit or less into the connecting pipe and the inside of the pipe to replace the inside of the connecting pipe and the pipe with the replacement gas.
A step of replacing the connecting pipe and the inside of the pipe with carbon dioxide gas from the replacement gas,
A method for transferring liquefied carbon dioxide, which comprises a step of transferring liquefied carbon dioxide between the external equipment and the tank through the connecting pipe and the pipe. 前記置換ガスは、水分量が所定の上限値以下に調整されたドライエアである
請求項１に記載の液化二酸化炭素の移載方法。 The method for transferring liquefied carbon dioxide according to claim 1, wherein the replacement gas is dry air whose water content is adjusted to a predetermined upper limit or less. 前記二酸化炭素ガスは、前記タンク内に貯留された液化二酸化炭素が気化することで生成されたボイルオフガスである
請求項１又は２に記載の液化二酸化炭素の移載方法。 The method for transferring liquefied carbon dioxide according to claim 1 or 2, wherein the carbon dioxide gas is a boil-off gas generated by vaporizing the liquefied carbon dioxide stored in the tank. 浮体本体と、
前記浮体本体に配置され、液化二酸化炭素を貯留可能なタンクと、
前記タンク内に連通し、外部設備と前記タンクとの間で液化二酸化炭素を送給させるための接続管が接続可能とされた配管と、
前記接続管が前記配管に接続された場合に、前記配管及び前記接続管の内部に、水分量が所定の上限値以下に調整された置換ガスを送り込む置換ガス供給部と、
前記配管及び前記接続管の内部に二酸化炭素ガスを送り込む二酸化炭素供給部と、を備える
浮体。 Floating body and
A tank that is placed in the floating body and can store liquefied carbon dioxide,
A pipe that communicates with the tank and has a connection pipe for supplying liquefied carbon dioxide between the external equipment and the tank.
When the connecting pipe is connected to the pipe, a replacement gas supply unit that sends a replacement gas whose water content is adjusted to a predetermined upper limit or less is sent into the pipe and the inside of the connecting pipe.
A floating body including a carbon dioxide supply unit that sends carbon dioxide gas into the pipe and the connection pipe. 前記置換ガス供給部は、外部から取り込んだ大気に含まれる水分を低減させるエアドライヤーを備えている
請求項４に記載の浮体。 The floating body according to claim 4, wherein the replacement gas supply unit includes an air dryer for reducing the moisture contained in the atmosphere taken in from the outside. 前記二酸化炭素供給部は、前記タンク内に貯留された液化二酸化炭素が気化することで生成されたボイルオフガスを、前記二酸化炭素ガスとして前記配管及び前記接続管の内部に送り込む、
請求項４又は５に記載の浮体。 The carbon dioxide supply unit sends the boil-off gas generated by the vaporization of the liquefied carbon dioxide stored in the tank into the pipe and the connection pipe as the carbon dioxide gas.
The floating body according to claim 4 or 5.
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