WO2023162350A1 - Method for treating gas of floating body, and floating body - Google Patents

Method for treating gas of floating body, and floating body Download PDF

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Publication number
WO2023162350A1
WO2023162350A1 PCT/JP2022/040718 JP2022040718W WO2023162350A1 WO 2023162350 A1 WO2023162350 A1 WO 2023162350A1 JP 2022040718 W JP2022040718 W JP 2022040718W WO 2023162350 A1 WO2023162350 A1 WO 2023162350A1
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WO
WIPO (PCT)
Prior art keywords
floating body
inert gas
processing
gas
gas supply
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PCT/JP2022/040718
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French (fr)
Japanese (ja)
Inventor
大祐 山田
健司 津村
龍 清野
篤史 吉田
皆光 高松
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三菱重工業株式会社
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Application filed by 三菱重工業株式会社 filed Critical 三菱重工業株式会社
Publication of WO2023162350A1 publication Critical patent/WO2023162350A1/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B57/00—Tank or cargo hold cleaning specially adapted for vessels
    • B63B57/04—Tank or cargo hold cleaning specially adapted for vessels by ventilating

Definitions

  • TECHNICAL FIELD The present disclosure relates to a floating body gas processing method and a floating body. This application claims priority to Japanese Patent Application No. 2022-027396 filed in Japan on February 25, 2022, the contents of which are incorporated herein.
  • Patent Literature 1 describes a ship capable of supplying inert gas into an oil tank of an oil transport ship.
  • the present disclosure has been made in view of the above circumstances, and provides a floating body gas processing method and a floating body that enable effective use of shipboard space and improved stability.
  • a floating body gas treatment method is a floating body gas treatment method for abatement of exhaust gas discharged when replacing the inside of a gas tank provided in the floating body with an inert gas, a treatment equipment preparation step of preparing a plurality of treatment equipment capable of abatement of the exhaust gas; A processing device selection step of selecting at least one or more of the processing devices according to the amount of gas, and the number of the processing devices selected in the processing device selection step as the floating body and another floating body different from the floating body. and a treatment step of treating the exhaust gas from the floating body using the treatment equipment installed in the treatment equipment installation step.
  • the floating body includes a floating body body, a gas tank provided in the floating body body and capable of storing liquefied gas, and a floating body detachably installed in the floating body body and discharged from the gas tank. and a plurality of treatment devices for abatement of exhaust gas, wherein the plurality of treatment devices are connected in parallel to the gas tank.
  • the floating body includes a floating body body, and an exhaust gas discharged from a gas tank that is detachably installed on the floating body body and is provided in another floating body and capable of storing liquefied gas. and a plurality of treatment devices for abatement of the gas, and the plurality of treatment devices are connected in parallel to the gas tank.
  • the floating body gas processing method and the floating body according to the present disclosure it is possible to effectively utilize the onboard space and improve the stability.
  • FIG. 2 is a diagram showing a schematic configuration of a floating body tank interior inspection preparation related equipment according to the first embodiment of the present disclosure
  • 4 is a flow chart of an exhaust gas processing operation of a floating body in the first embodiment of the present disclosure
  • 4 is a flow chart of an inert gas supply operation in the first embodiment of the present disclosure
  • FIG. 3 is a diagram corresponding to FIG. 2 in the second embodiment of the present disclosure
  • 6 is a flow chart of the exhaust gas processing operation of the floating body in the second embodiment of the present disclosure.
  • 6 is a flow chart of an inert gas supply operation in the second embodiment of the present disclosure
  • FIG. 3 is a diagram corresponding to FIG. 2 in a modification of the first embodiment of the present disclosure
  • FIG. 6 is a diagram corresponding to FIG. 5 in a modification of the second embodiment of the present disclosure;
  • a floating body gas processing method and a floating body in the first embodiment of the present disclosure will be described based on the drawings.
  • a floating body in the present embodiment a so-called ammonia fuel ship using ammonia, which is a liquefied gas, as fuel will be described as an example.
  • FIG. 1 is a configuration diagram showing a schematic configuration of the floating body of this first embodiment.
  • the bow-to-stern direction AF of the floating body is indicated by an arrow.
  • the floating body 1 in the first embodiment includes a floating body body 2, a cargo tank 3, an engine 4, an upper structure 5, a gas fuel tank (gas tank) 6, and an inert gas supply device 20. and a processing device 21 .
  • the floating body body 2 has a pair of sideboards 7 (only the starboard side is shown in FIG. 1), a ship bottom 8, and an upper deck 9.
  • the upper deck 9 is the uppermost all-through deck, and is an exposed deck in the floating body 2 in this embodiment.
  • a cargo hold 10 and a main engine room 11 are partitioned inside the floating body body 2 .
  • the floating body body 2 has a screw 12 and a rudder 13 below the stern 2A.
  • the cargo hold 10 is a space that accommodates the cargo tank 3.
  • a floating body 1 exemplified in this embodiment has a plurality of (more specifically, three) cargo holds 10 arranged side by side from a bow 2F to a stern 2A. These cargo holds 10 are partitioned in the fore-and-aft direction AF by partition walls 10a.
  • the main engine room 11 is a section that houses the engine 4, and is arranged closer to the stern 2A than the cargo hold 10. Further, the main engine room 11 is arranged below the upper structure 5 .
  • the main engine room 11 in this embodiment is partitioned vertically by an inner bottom plate 14 forming a double bottom and a deck 15 formed one above the bottom plate 14 .
  • the cargo tank 3 is a tank that can store, for example, liquefied gas (ammonia, LPG, LNG, etc.) as cargo.
  • the cargo tanks 3 are accommodated one by one in the plurality of cargo holds 10 described above. That is, like the cargo holds 10, the cargo tanks 3 are also arranged side by side in the fore-and-aft direction AF.
  • the engine 4 can be driven using ammonia as fuel.
  • the engine 4 rotates the screw 12 to generate thrust.
  • the engine 4 is accommodated in the main engine room 11 mentioned above.
  • the fuel of the engine 4 is not limited to ammonia alone, and ammonia and other fuels (such as light oil) may be used together (bi-fuel) or mixed (dual-fuel).
  • the engine 4 is not limited to driving the screw 12 .
  • the engine 4 may drive a generator. This engine 4 is normally driven using ammonia stored in a gas fuel tank 6 .
  • the superstructure 5 is formed on the upper deck 9 and has a bridge, living quarters, etc.
  • the upper structure 5 is arranged at a position closer to the stern 2A than the cargo hold 10 in the fore-and-aft direction and above the main engine room 11 .
  • the gas fuel tank 6 stores liquefied ammonia, which is the fuel for the engine 4 described above.
  • the gas fuel tank 6 in this embodiment is installed on the upper deck 9 as an example.
  • the gas fuel tank 6 is a so-called Type-C tank, which is a cylindrical pressure tank. is exemplified.
  • the gas fuel tank 6 is not limited to the above shape, number and arrangement.
  • the inert gas supply device 20 is detachably installed on the floating body main body 2 .
  • the inert gas supply device 20 is configured to be able to supply inert gas to the gas fuel tank 6 when preparing to inspect the inside of the gas fuel tank 6 to make the gas fuel tank 6 gas-free. Nitrogen can be exemplified as an inert gas. Further, the inert gas supply device 20 may be configured to supply air so as to replace the inert gas in the gas fuel tank 6 with air.
  • the inert gas supply device 20 of this embodiment is detachably installed on the upper deck 9 as an example. Moreover, although the inert gas supply device 20 of the present embodiment is housed in an ISO standard marine container, it is not limited to being housed in an ISO standard marine container.
  • the processing device 21 is detachably installed with respect to the floating body main body 2 .
  • the processing device 21 is configured to be able to abate the exhaust gas discharged from the gas fuel tank 6 during inerting to make the gas fuel tank 6 gas-free.
  • combustion abatement in which the exhaust gas introduced into the processing device 21 is combusted can be exemplified as a method for abatement of the exhaust gas.
  • the processing device 21 of this embodiment is detachably installed on the upper deck 9 as an example. More specifically, the treatment device 21 of this embodiment is housed in an ISO standard marine container, like the inert gas supply device 20 described above. When the treatment device 21 is housed in a marine container, the marine container contains, for example, a combustion abatement device (not shown), a fuel tank (not shown) for storing fuel for the combustion abatement device, and the like. It houses a set of equipment for gas abatement.
  • the processing device 21 of the present embodiment is stacked (stacked) on the inert gas supply device 20 .
  • the inert gas supply device 20 and the treatment device 21 can be installed and removed from the floating body 2 using a container handling crane installed on a quay or the like. Although a case where the container size of the processing device 21 and the container size of the inert gas supply device 20 are the same is shown, these container sizes are not limited to the same.
  • a dedicated space 16 for loading the processing device 21 and the inert gas supply device 20 is secured in advance.
  • the upper deck 9 is reinforced so as to be able to support the treatment device 21 and the inert gas supply device 20 .
  • piping (not shown) for communicating the processing device 21 and the gas fuel tank 6, and the inert gas supply device 20 and the gas fuel tank 6 are arranged around the dedicated space 16.
  • Each connecting end of the tubing (not shown) may be provided for communication.
  • FIG. 2 is a diagram showing a schematic configuration of a floating body tank interior inspection preparation related equipment according to the first embodiment of the present disclosure.
  • the floating body 1 of this embodiment includes a plurality of gas fuel tanks 6, an exhaust gas pipe 25 for guiding the exhaust gas from these gas fuel tanks 6, and an inert gas in the plurality of gas fuel tanks 6. and an inert gas supply pipe 26 for guiding the .
  • the exhaust gas pipe 25 includes an exhaust gas branch pipe 27 and an exhaust gas main pipe 28 .
  • Exhaust gas branch pipes 27 extend from the plurality of gas fuel tanks 6 respectively. These exhaust gas branch pipes 27 are joined and connected to the exhaust gas main pipe 28 .
  • the exhaust gas main line 28 is provided at its end with a distribution connection 30 for distributing the exhaust gas to a plurality of treatment units 21 .
  • the processing equipment 21 includes an introduction line 31 for introducing the exhaust gas.
  • An inlet end 31 s of the introduction line 31 is detachable from the distribution connection portion 30 .
  • FIG. 2 illustrates a case where a small processing device 33 is separately provided for processing the fluid discharged by pipe purge other than the gas fuel tank 6 and the vaporized gas discharged from the cargo tank 3 .
  • the floating body 1 has two gas fuel tanks 6
  • only one gas fuel tank 6 may be provided, or three or more gas fuel tanks 6 may be provided.
  • only one inlet end 31s of the introduction line 31 is shown in FIG. are respectively connected to (the second embodiment is also the same).
  • One or more processing devices 21 are installed in the floating body body 2 according to the amount of exhaust gas discharged from the gas fuel tank 6 .
  • the amount of exhaust gas discharged from the gas fuel tank 6 increases as the capacity of the gas fuel tank 6 increases, and decreases as the capacity of the gas fuel tank 6 decreases.
  • a plurality of (specifically, three) processing devices 21 are installed, and these processing devices 21 are connected in parallel to the gas fuel tank 6. .
  • the total processing capacity (volumetric flow rate) of these plurality of processing devices 21 exceeds the amount (volumetric flow rate) of exhaust gas discharged from one floating body 1 .
  • the difference between the total processing capacity (volumetric flow rate) of the plurality of treatment devices 21 installed in one floating body 1 and the amount of exhaust gas discharged from one floating body 1 is It is smaller than the processing capacity of the processing device 21 of the stand.
  • the inert gas supply pipe 26 has a supply main pipe 36 and a supply branch pipe 37 .
  • the main supply line 36 is provided with a merge connection 32 at its inlet end 36s.
  • the supply branch pipe 37 is branched and connected to the main supply pipe 36 to communicate the main supply pipe 36 and the gas fuel tank 6 .
  • the inert gas supply device 20 has a supply line 38 for supplying inert gas.
  • An outlet end 38 o of the supply line 38 is detachable from the confluence connection portion 32 of the inert gas supply pipe 26 . Although only one outlet end 38o of the supply line 38 is shown in FIG. are respectively connected to (the second embodiment is also the same).
  • the floating body main body 2 is equipped with at least one or more inert gas supply devices 20 corresponding to the amount of inert gas (volumetric flow rate) necessary for preparing for the inspection of the inside of the tank in one floating body 1 .
  • a plurality of (specifically, three) inert gas supply devices 20 are installed, and these plurality of inert gas supply devices 20 are connected to the gas fuel tank 6. connected in parallel.
  • FIG. 3 is a flow chart of a floating body exhaust gas treatment operation in the first embodiment of the present disclosure.
  • the exhaust gas treatment work in the floating body gas treatment method in the present embodiment includes at least a treatment equipment preparation step (step S11), a treatment equipment selection step (step S12), and a treatment equipment installation step (step S13) and a processing step (step S14).
  • the floating body gas processing method of the present embodiment further includes a processing device removal step (step S15) and a processing device storage step (step S16).
  • a plurality of processing devices 21 capable of abatement of exhaust gas are prepared. More specifically, a large number of treatment devices 21 capable of removing the ammonia gas contained in the exhaust gas discharged from the gas fuel tank 6 are prepared by warming up and preparing for inspection inside the tank. These prepared processing apparatuses 21 are stored in a predetermined storage place, taken out from the predetermined storage place when used, and returned to the predetermined storage place after use. Then, when the gas fuel tank 6 is made gas-free, such as when the floating body 1 enters the dock for periodic inspection or the like, the process advances to the processing device selection step (step S12).
  • processing device selection step at least one processing device corresponding to the amount of exhaust gas discharged from one floating body is selected from among the plurality of processing devices 21 prepared in the processing device preparation step (step S11).
  • the above processing device 21 is selected. That is, the number of processing units 21 to be used in one floating body for which warm-up and tank interior inspection preparations are performed is determined, and that number of processing units 21 is selected from a large number of stored processing units 21 . These selected processing equipments 21 are transported to the floating body 1 where the warm-up and preparation for inspection of the inside of the tank are performed.
  • the processing devices 21 corresponding to the number selected in the processing device selection step (step S12) are installed on the floating body 1.
  • a processing device 21 is installed in a dedicated space 16 above the upper deck 9 of the floating body 1 .
  • the other processing apparatuses 21 are stacked (stacked) on the processing apparatus 21 installed on the upper deck 9 .
  • the plurality of processing apparatuses 21 are connected in parallel to the gas fuel tank 6 .
  • the exhaust gas from the floating body 1 is treated using the treatment device 21 installed in the treatment device installation step (step S13). That is, the exhaust gas discharged from the gas fuel tank 6 during warm-up and preparation for inspection inside the tank is guided to the processing device 21, and after being subjected to a detoxification treatment such as combustion detoxification by the processing device 21, it is released to the atmosphere.
  • a detoxification treatment such as combustion detoxification by the processing device 21, it is released to the atmosphere.
  • the processing step (step S14) is performed in accordance with the timing when the supply step (step S24) by the inert gas supply device 20, which will be described later, is performed.
  • step S15 the processing device 21 is removed from the floating body 1 after the above processing step (step S14) is completed.
  • the gas in the gas fuel tank 6 is replaced with an inert gas before the floating body enters the dock for periodic inspection or the like, and the inert gas is replaced with air. complete.
  • the processing device 21 removed in the processing device removal step (step S15) is stored. That is, the processing device 21 removed from the floating body 1 is transported and stored together with a large number of other processing devices 21 at the predetermined storage location described above.
  • FIG. 4 is a flow chart of inert gas supply operation in the first embodiment of the present disclosure.
  • the floating body gas treatment method according to the present embodiment performs an inert gas supply operation in addition to the exhaust gas treatment operation described above.
  • the inert gas supply operation includes an inert gas supply device preparation step (step S21), an inert gas supply device selection step (step S22), an inert gas supply device installation step (step S23), and a supply step (step S24) and.
  • the inert gas supply operation of the present embodiment includes an inert gas supply device removal step (step S25) and an inert gas supply device storage step (step S26).
  • step S21 a plurality of inert gas supply devices 20 capable of supplying inert gas to the inside of the gas fuel tank 6 are prepared.
  • the prepared inert gas supply device 20 is stored in a predetermined storage place, taken out from the predetermined storage place when used, and returned to the predetermined storage place after use.
  • the process proceeds to the inert gas supply device selection step (step S22).
  • one of the inert gas supply devices 20 prepared in the inert gas supply device preparation step (step S21) is required for one floating body 1.
  • At least one or more inert gas supply devices 20 are selected according to the amount of inert gas. That is, the number of inert gas supply devices 20 to be used in one floating body 1 for which tank interior inspection preparations are to be performed is determined, and the number of inert gas supply devices 20 that are to be used is transferred to a large number of stored inert gas supply devices. 20 to choose from.
  • These selected inert gas supply devices 20 are transported toward the floating body 1 where preparations for the tank interior inspection are made.
  • the storage location of the inert gas supply device 20 and the storage location of the processing device 21 may be the same storage location.
  • the number of inert gas supply devices 20 selected in the inert gas supply device selection step (step S22) is installed on the floating body 1.
  • an inert gas supply device 20 is installed in a dedicated space 16 above the upper deck 9 of the floating body 1 .
  • the other processing devices 21 are stacked (stacked) on the inert gas supply device 20 installed on the upper deck 9.
  • the inert gas supply device 20 may be stacked on the processing device 21 or the processing device 21 may be stacked on the inert gas supply device 20 .
  • the plurality of inert gas supply devices 20 are connected in parallel to the gas fuel tank 6 .
  • step S24 the inert gas is supplied to the gas fuel tank 6 of the floating body 1 using the inert gas supply device 20 installed in the supply step (step S24). Since exhaust gas is discharged from the gas fuel tank 6 after the start of the inert gas supply operation in this supply step (step S24), this exhaust gas is treated in the above-described treatment step (step S14).
  • step S25 the inert gas supply device 20 is removed from the floating body 1 after the above supply step (step S24) is completed.
  • the supply step (step S24) is completed when the air in the gas fuel tank 6 is replaced with the inert gas after the periodic inspection, etc. of the floating body.
  • the replacement work is carried out at a fuel gas intake base or the like, the work is completed when the inert gas in the gas fuel tank 6 is replaced with air.
  • the inert gas supply device 20 removed in the inert gas supply device removal step (step S25) is stored. That is, the inert gas supply device 20 removed from the floating body 1 is transported and stored together with many other inert gas supply devices 20 at the predetermined storage location described above.
  • the number of processing devices corresponding to the amount of exhaust gas discharged from the gas fuel tank 6 21 can be installed on the floating body 1 to treat the exhaust gas of the floating body 1. Therefore, it is not necessary to constantly equip the floating body 1 with a large-sized processing device for processing the exhaust gas discharged from the gas fuel tank 6, so that initial equipment investment, installation space and center of gravity can be suppressed. In addition, there is no need to occupy a land facility or a bunker ship equipped with a treatment facility for treating the exhaust gas.
  • the treatment device 21 can be removed from the floating body 1 and stored, so there is no need to make the gas fuel tank 6 gas-free with another floating body. If this occurs, the stored processing equipment 21 can be used. Therefore, the operating rate of the processing device 21 can be improved.
  • the number of inert gas supply devices 20 corresponding to the required amount of inert gas is installed in the floating body. 1, the inert gas can be supplied to the inside of the gas fuel tank 6 of the floating body 1. Therefore, it is no longer necessary to constantly equip the floating body 1 with the inert gas supply device 20 having an excessive capacity. In addition, it is no longer necessary to occupy a land facility equipped with an inert gas supply device or a bunker ship equipped with an inert gas supply device.
  • the inert gas supply device 20 can be removed from the floating body 1 and stored.
  • the stored inert gas supply 20 can be used when the need arises to do so. Therefore, the operating rate of the inert gas supply device 20 can be improved.
  • the processing device 21 is further accommodated in a marine container that can be stacked and loaded on the floating body main body 2, so that the processing device 21 can be loaded using a crane for handling containers provided on a quay or the like. can be installed and removed, it becomes possible to easily perform the installation work to the floating body 1 and the removal work.
  • a floating body 101 of the second embodiment includes a floating body body 2 , a cargo tank 3 , an engine 4 , an upper structure 5 , and a gas fuel tank (gas tank) 6 .
  • FIG. 5 is a diagram corresponding to FIG. 2 in the second embodiment of the present disclosure.
  • the floating body 101 of the second embodiment includes a plurality of gas fuel tanks 6 , an exhaust gas pipe 25 for guiding the exhaust gas from these gas fuel tanks 6 , and inert gas to the plurality of gas fuel tanks 6 . and an inert gas supply pipe 26 for guiding gas.
  • the exhaust gas pipe 25 includes an exhaust gas branch pipe 27 and an exhaust gas main pipe 28 .
  • Exhaust gas branch pipes 27 extend from the plurality of gas fuel tanks 6 respectively. These exhaust gas branch pipes 27 are joined and connected to the exhaust gas main pipe 28 .
  • the exhaust gas main pipe 28 is connected to a first external pipe connection portion 40 provided on the floating body 101 .
  • the first external pipe connection part 40 is for connecting a pipe outside the floating body 2 , and is installed, for example, at a bunker station of the floating body 2 .
  • the inert gas supply pipe 26 has a main supply pipe 36 and a branch pipe 37 .
  • An inlet end 36 s of the main supply pipe 36 is connected to a second external pipe connection portion 41 .
  • the supply branch pipe 37 is branched and connected to the main supply pipe 36 to communicate the main supply pipe 36 and the gas fuel tank 6 .
  • the second external pipe connection part 41 is also installed, for example, at a bunker station of the floating body 2 or the like.
  • the processing device 21 of this second embodiment is detachably installed outside the floating body 2 .
  • the inert gas supply device 20 of the second embodiment is also detachably installed on the outside of the floating body main body 2 of the floating body 101, like the treatment device 21.
  • the processing device 21 and the inert gas supply device 20 of this second embodiment are detachably installed on another floating body 200 different from the floating body 101 .
  • Other floating bodies 200 can be exemplified by barges, cargo ships, processing ships, and the like.
  • the treatment devices 21 installed on other floating bodies 200 each have an introduction line 31 for introducing the exhaust gas.
  • An inlet end 31 s of the introduction line 31 is detachably connected to a distribution connection portion 30 installed on another floating body 200 .
  • the distribution connection portion 30 is detachably connected to the above-described first external pipe connection portion 40 of the floating body 101 via a first connection pipe 42 such as a hose.
  • the introduction line 31 of the other floating body 200 can be connected to the exhaust gas piping 25 of the floating body 101 by the distribution connection portion 30, the first connection pipe 42, and the first external pipe connection portion 40.
  • the processing device 21 of another floating body 200 can be connected to the gas fuel tank 6 of the floating body 101 .
  • Another floating body 200 is equipped with one or more treatment devices 21 corresponding to the amount of exhaust gas discharged from the gas fuel tank 6 .
  • a plurality of (specifically, three) processing devices 21 are installed, and these plurality of processing devices 21 are connected in parallel to the gas fuel tank 6 .
  • the processing capacity (volumetric flow rate) of these plurality of processing devices 21 is the same as that of the above-described first embodiment, and is a processing capacity capable of processing exhaust gas discharged from one floating body 1 .
  • the inert gas supply devices 20 installed on other floating bodies 200 each have a supply line 38 for supplying inert gas.
  • An outlet end 38 o of the supply line 38 is detachably connected to a confluence connection portion 32 installed on another floating body 200 .
  • the confluence connection portion 32 can be connected to a second external pipe connection portion 41 via a second connection pipe 43 such as a hose.
  • the supply line 38 of the other floating body 200 can be connected to the inert gas supply pipe 26 of the floating body 101 by the confluence connection portion 32, the second connection pipe 43, and the second external pipe connection portion 41.
  • the inert gas supply device 20 installed in another floating body 200 can be connected to the gas fuel tank 6 of the floating body 101 .
  • the gas processing method for the floating body 101 of the second embodiment differs from the gas processing method for the floating body 1 in the first embodiment only in that the processing device 21 and the inert gas supply device 20 are installed in another floating body 200. . Therefore, the steps that are the same as those in the first embodiment will be described with the same reference numerals, and redundant description will be omitted. As in the first embodiment, the following exhaust gas processing operation by the processing device 21 and the inert gas supply operation by the inert gas supply device 20 are performed in parallel.
  • FIG. 6 is a flow chart of the exhaust gas processing operation of the floating body in the second embodiment of the present disclosure.
  • the exhaust gas treatment work in the floating body gas treatment method in the second embodiment includes at least a treatment equipment preparation step (step S11), a treatment equipment selection step (step S12), and a treatment equipment installation step ( step S113) and a processing step (step S14).
  • the floating body gas processing method of the present embodiment further includes a processing device removal step (step S115) and a processing device storage step (step S16).
  • a processing device preparation step (step S11) and a processing device selection step (step S12) are performed.
  • a plurality of processing apparatuses 21 capable of abatement of exhaust gas are prepared, and at least one of the prepared plurality of processing apparatuses 21 is selected according to the amount of exhaust gas discharged from one floating body 101.
  • the above processing device 21 is selected.
  • the number of processing devices 21 selected in the processing device selection step (step S12) is installed on a floating body 200 different from the floating body 101.
  • the processing device 21 is installed in a cargo space (not shown) of another floating body 200 or the like. If another floating body 200 is a container carrier or the like, it may be installed by stacking it on another container.
  • the processing apparatuses 21 may be stacked (stacked) and installed.
  • the processing device 21 installed in another floating body 200 is further connected to the gas fuel tank 6 of the floating body 101.
  • another floating body 200 is moved to the vicinity of the floating body 101 by towing or self-propelled, and the introduction line 31 is connected to the distribution connection portion 30, and the distribution connection portion 30 and the first external pipe connection portion are connected. 40 are connected by a first connection pipe 42 .
  • a plurality of introduction lines 31 are connected to the distribution connection section 30 .
  • a plurality of processing devices 21 are connected in parallel to the gas fuel tank 6 .
  • the treatment device 21 installed in the treatment device installation step (step S113) is used to treat the exhaust gas from the floating body 101 in the same manner as in the first embodiment. That is, the exhaust gas discharged from the gas fuel tank 6 during warm-up and preparation for inspection inside the tank is guided to the treatment device 21 installed on the other floating body 200, and the treatment device 21 performs a detoxification treatment such as combustion abatement. After doing so, release it into the atmosphere.
  • the processing device 21 is removed from the other floating body 200 after the above processing step (step S14) is completed.
  • the first connection pipe 42 is removed from the distribution connection portion 30 and the first external pipe connection portion 40
  • the processing device 21 is removed from the other floating body 200 .
  • the work of removing the processing device 21 from the other floating body 200 may be performed, for example, by moving the other floating body 200 from the vicinity of the floating body 101 by towing or propelling it to the shore.
  • the processing device 21 removed from the vessel may be transferred to another small vessel or the like for transportation.
  • the processing device 21 removed in the processing device removal step is stored, as in the first embodiment. That is, the processing equipment 21 that has been removed from another floating body 200 is transported and stored together with a large number of other processing equipment 21 at the predetermined storage location described above.
  • FIG. 7 is a flow chart of inert gas supply operation in the second embodiment of the present disclosure.
  • an inert gas supply operation is performed in addition to the exhaust gas treatment operation described above.
  • the inert gas supply operation includes an inert gas supply device preparation step (step S21), an inert gas supply device selection step (step S22), an inert gas supply device installation step (step S123), and a supply step (step S24) and.
  • the inert gas supply operation of the present embodiment includes an inert gas supply device removal step (step S125) and an inert gas supply device storage step (step S26).
  • an inert gas supply device preparation step (step S21) and an inert gas supply device selection step (step S22) are performed. That is, a plurality of inert gas supply devices 20 capable of supplying inert gas to the inside of the gas fuel tank 6 are prepared, and from among the prepared plurality of inert gas supply devices 20, one floating body 101 needs At least one or more inert gas supply devices 20 are selected according to the amount of inert gas to be used.
  • the number of inert gas supply devices 20 selected in the inert gas supply device selection step (step S22) is installed on other floating bodies 200.
  • the inert gas supply device 20 is installed in the cargo space of another floating body 200 or the like. If another floating body 200 is a container carrier or the like, it may be installed by stacking it on another container. Further, as in the first embodiment, the processing apparatus 21 may be stacked (stacked), and when a plurality of inert gas supply apparatuses 20 are installed, the inert gas supply apparatuses 20 are stacked. can be installed.
  • the inert gas supply device 20 installed in another floating body 200 is further connected to the gas fuel tank 6 of the floating body 101.
  • another floating body 200 is moved to the vicinity of the floating body 101 by towing or self-propelled, and the supply line 38 is connected to the confluence connection portion 32, and the confluence connection portion 32 and the second external pipe connection portion are connected. 41 are connected by a second connection pipe 43 .
  • a plurality of supply lines 38 are connected to the confluence connection portion 32 .
  • a plurality of inert gas supply devices 20 are connected in parallel to the gas fuel tank 6 .
  • the inert gas supply device 20 installed in the other floating body 200 in the supply step (step S24) is used to supply inert gas to the gas fuel tank 6 of the floating body 101 in the same manner as in the first embodiment.
  • Supply active gas That is, the gas in the gas fuel tank 6 is replaced with the inert gas supplied from the inert gas supply device 20 .
  • step S125 the inert gas supply device 20 is removed from the other floating body 200 after the above supply step (step S24) is completed.
  • the supply step (step S24) is completed when, for example, the floating body 101 leaves the dock for periodic inspection or the like and the air in the gas fuel tank 6 is replaced with inert gas.
  • the inert gas supply device 20 removed in the inert gas supply device removal step (step S125) is stored as in the first embodiment. That is, the inert gas supply device 20 that has been removed from the floating body is transported and stored together with a large number of other inert gas supply devices 20 at the predetermined storage location described above. For transportation from another floating body 200 to a storage place, the inert gas supply device 20 and the processing device 21 may be mixed together.
  • the treatment device 21 can be removed from the other floating body 200 and stored, so the gas fuel tank 6 is made gas-free with another floating body.
  • the stored processing equipment 21 can be used when the need arises.
  • another floating body 200 from which the processing equipment 21 has been removed can be used for other purposes such as transporting equipment other than the processing equipment 21 . Therefore, the operation rate of the processing device 21 and other floating body 200 can be improved.
  • the inert gas supply device 20 can be removed from the other floating body 200 and stored.
  • the stored inert gas supply device 20 can be used when it becomes necessary to supply inert gas.
  • another floating body 200 from which the inert gas supply device 20 has been removed can be used for other purposes such as transporting items other than the inert gas supply device 20 . Therefore, the operating rate of the inert gas supply device 20 and other floating body 200 can be improved.
  • the processing device 21 is installed in the floating body 1, and in the second embodiment, the processing device 21 is installed in another floating body 200.
  • the configuration is not limited to the above configuration, and for example, the configuration of the first embodiment and the configuration of the second embodiment may be combined. That is, when a plurality of processing devices 21 are provided, the processing device 21 may be provided for each of the floating body 1 and the other floating body 200 and these processing devices 21 may be connected to the gas fuel tank 6 in parallel.
  • the processing device 21 and the inert gas supply device 20 are housed in stackable containers.
  • the processing device 21 and the inert gas supply device 20 are not limited to being housed in a container or being stackable.
  • the gas tank is the gas fuel tank 6 that stores the fuel gas
  • the gas tank is not limited to the gas fuel tank 6 .
  • it may be the cargo tank 3 or another tank.
  • the inert gas is supplied from the inert gas supply device 20 when making the gas fuel tank 6 gas-free. If there is no problem with the stored material coming into contact with oxygen, outside air may be taken in instead of the inert gas.
  • the processing device 21 and the inert gas supply device 20 are housed in separate containers, but the processing device 21 and the inert gas supply device 20 are housed in the same container. It may be accommodated.
  • the inert gas supply device 20 is not limited to being housed in a marine container.
  • the inert gas supply device 20 may have, for example, a configuration in which an ISO standard tank container capable of storing liquid nitrogen and a vaporizer that vaporizes the liquid nitrogen are combined.
  • the processing device 21 illustrated the case where a complete set of devices for combustion abatement of exhaust gas, such as a combustion abatement device and a fuel tank for storing fuel for the combustion abatement device, is housed in a marine container.
  • the processing device 21 is not limited to the combustion type.
  • it may be an ISO standard tank container capable of storing liquefied gas or an ISO standard tank container capable of storing liquid capable of absorbing liquefied gas.
  • the processing apparatus 21 may have a configuration in which an ISO standard tank container capable of storing the liquefied gas and an ISO standard tank container capable of storing a liquid capable of absorbing the liquefied gas are combined.
  • the piping system used in the processing device 21 and the piping system used in the inert gas supply device 20 are separately provided.
  • one piping system is provided, and this piping system is connected to the treatment device 21 and inactive. It may be shared with the active gas supply device 20 .
  • the treatment device 21 and the inert gas supply device 20 are installed on the upper deck 9, which is the exposed portion, has been explained.
  • the place where the processing device 21 and the inert gas supply device 20 are installed may be a semi-exposed area or a room.
  • FIG. 8 is a diagram corresponding to FIG. 2 in the modification of the first embodiment of the present disclosure.
  • FIG. 9 is a diagram corresponding to FIG. 5 in a modification of the second embodiment of the present disclosure.
  • a temperature raising system 50 may be provided to raise the temperature in the gas fuel tank 6 by using exhaust heat from the processing device 21 or the like.
  • the gas supplied to the gas fuel tank 6 by the inert gas supply device 20 can be heated by the heating system 50 . By doing so, it becomes possible to perform processes such as treating the residual liquid in the gas fuel tank 6 and raising the wall surface temperature in the gas fuel tank 6 .
  • the gas treatment method for the floating bodies 1 and 101 abates the exhaust gas discharged when the inside of the gas tank 6 provided in the floating bodies 1 and 101 is replaced with an inert gas.
  • a gas processing method comprising: a processing device preparation step (step S11) of preparing a plurality of processing devices 21 capable of removing the exhaust gas, and a plurality of processing devices prepared in the processing device preparation step (step S11) a processing device selection step (step S12) of selecting at least one or more of the processing devices 21 from among the processing devices 21 according to the amount of the exhaust gas discharged from one floating body 1, 101;
  • Examples of the floating bodies 1 and 101 include ships such as liquefied gas carriers, ferries, RORO ships, car carriers, and passenger ships, FSUs (Floating Storage Units), FSRUs (Floating Storage and Regasification Units), and the like.
  • ships such as liquefied gas carriers, ferries, RORO ships, car carriers, and passenger ships, FSUs (Floating Storage Units), FSRUs (Floating Storage and Regasification Units), and the like.
  • the number of processing devices 21 corresponding to the amount of exhaust gas discharged from the gas tank 6 can be set to the floating body 1, 101 or the floating body 1. , 101 to treat the exhaust gas of the floating bodies 1, 101. Therefore, it is not necessary to always equip the floating bodies 1 and 101 with a large-sized processing device for processing the exhaust gas discharged from the gas tank 6 . In addition, it is no longer necessary to occupy land-based facilities with treatment facilities or bunker ships with treatment facilities.
  • the weight of the floating bodies 1, 101 and other floating bodies 200 can be reduced, for example, fuel for moving the floating bodies 1, 101 and other floating bodies 200 Consumption can be reduced. Therefore, it is possible to make effective use of space on board and improve stability.
  • the gas processing method for a floating body is the gas processing method for a floating body according to (1), wherein the processing device installation step (step S13) includes the processing device selection step (step S12). If the number of the processing apparatuses 21 selected in 1. is plural, the plural processing apparatuses 21 are connected to the gas tank 6 in parallel. As a result, the exhaust gas discharged from the gas tank 6 can be quickly processed.
  • the gas processing method for a floating body is the gas processing method for a floating body according to (1) or (2), wherein after the processing step (step S14) is completed, the processing device 21 from the floating body 1, 101 (step S15), and a processing device storage step (step S16) of storing the processing device 21 removed in the processing device removal step (step S15). .
  • the treatment device 21 can be removed from the floating body 1, 101 and stored.
  • a processing device 21 as described can be used.
  • the gas processing method for a floating body is the gas processing method for a floating body according to any one of (1) to (3), wherein an inert gas can be supplied to the inside of the gas tank 6.
  • an inert gas supply device preparation step (step S21) for preparing a plurality of inert gas supply devices 20, and the plurality of inert gas supply devices prepared in the inert gas supply device preparation step (step S21) an inert gas supply device selection step of selecting at least one or more of the inert gas supply devices 20 from among 20 according to the amount of the inert gas required for one floating body 1, 101 (step S22) and at least the number of inert gas supply devices 20 selected in the inert gas supply device selection step (step S22) among the floating bodies 1 and 101 and other floating bodies 200 different from the floating bodies 1 and 101
  • the inert gas is supplied to the gas tank 6 using the inert gas supply device installation step (step S23) installed on one side and the inert gas supply device 20 installed in the inert
  • step S24 a supply step (step S24) of supplying the
  • the number of inert gas supply devices corresponding to the required amount of inert gas can be supplied.
  • 20 can be installed on the floating body 1,101 or another floating body 200 different from the floating body 1,101 to supply inert gas to the inside of the gas tank 6 of the floating body 1,101. Therefore, it becomes unnecessary to always equip the floating bodies 1 and 101 with the inert gas supply device 20 .
  • the land facility equipped with the inert gas supply device 20 and the bunker ship equipped with the inert gas supply device 20 are not occupied.
  • the weight of the floating bodies 1 and 101 and the other floating bodies 200 can be reduced, fuel consumption when moving the floating bodies 1 and 101 and the other floating bodies 200 can be reduced, for example.
  • the method for gas treatment of a floating body is the method for gas treatment of a floating body of (4), wherein after the supply step (step S24) is completed, the inert gas supply device 20 is An inert gas supply device removal step (step S25) for removing from the floating body 1, 101, and an inert gas supply for storing the inert gas supply device 20 removed in the inert gas supply device removal step (step S25) and an apparatus storage step (step S26).
  • the inert gas supply device 20 can be removed from the floating bodies 1 and 101 and stored. If this occurs, the stored inert gas supply 20 can be used.
  • the floating body includes a floating body main body 2, a gas tank 6 provided in the floating body main body 2 and capable of storing liquefied gas, and detachably installed on the floating body main body 2, and a plurality of treatment devices 21 for abatement of exhaust gas discharged from the gas tank 6 , and the plurality of treatment devices 21 are connected in parallel to the gas tank 6 .
  • the processing device 21 when the processing device 21 is not used, it can be removed from the floating body main body 2 . Therefore, the processing device 21 can be used by installing it in the floating body main body of another floating body.
  • each processing device 21 can be reduced while ensuring the same processing performance as when using a single large processing device 21. It is possible to reduce the burden on the operator involved in attaching and detaching the processing device 21 .
  • the floating body is installed detachably from the floating body main body 2 and the floating body main body 2, and discharges the liquefied gas from the gas tank 6 provided in the other floating body 200 that can store the liquefied gas. and a plurality of treatment devices 21 for abatement of the emitted exhaust gas, and the plurality of treatment devices 21 are connected in parallel to the gas tank 6 .
  • the exhaust gas discharged from the gas tanks 6 provided in the other floating bodies 200 can be quickly treated using the plurality of treatment devices 21 provided in the floating bodies 1 and 101 .
  • the size of each processing device 21 can be reduced while ensuring the same processing performance as when using a single large processing device. The burden on the operator involved in attaching and detaching the device 21 can be reduced.
  • the floating body is the floating body of (6) or (7), which is detachably installed on the floating body body 2 and capable of supplying inert gas to the gas tank 6.
  • An inert gas supply device 20 is provided. Thereby, when the inert gas supply device 20 is not used, it can be removed from the floating body main body 2 . Therefore, the inert gas supply device 20 can be used by installing it in the floating body main body 2 of another floating body.
  • the floating body is any one of (6) to (8), and the processing device 21 is housed in a container that can be stacked and loaded on the floating body main body 2. ing.
  • the processing device 21 can be installed and removed using a container handling crane or the like provided on a quay or the like. It becomes possible.
  • the floating body gas processing method and the floating body according to the present disclosure it is possible to effectively utilize the onboard space and improve the stability.

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Abstract

This method for treating gas of a floating body comprises: a treatment apparatus preparation step for preparing multiple treatment apparatuses that are capable of detoxifying exhaust gas; a treatment apparatus selection step for selecting, from among the multiple treatment apparatuses prepared in the treatment apparatus preparation step, one or more of the treatment apparatuses in accordance with the amount of the exhaust gas to be discharged from one floating body; a treatment apparatus installation step for installing the number of the treatment apparatuses selected in the treatment apparatus selection step on the floating body and/or on another floating body different from said floating body; and a treatment step for treating the exhaust gas of the floating body using the treatment apparatuses installed in the treatment apparatus installation step.

Description

浮体のガス処理方法及び浮体Floating body gas treatment method and floating body
　本開示は、浮体のガス処理方法及び浮体に関する。
　本願は、２０２２年２月２５日に日本に出願された特願２０２２－０２７３９６号について優先権を主張し、その内容をここに援用する。 TECHNICAL FIELD The present disclosure relates to a floating body gas processing method and a floating body.
This application claims priority to Japanese Patent Application No. 2022-027396 filed in Japan on February 25, 2022, the contents of which are incorporated herein.
　ＬＰＧ（liquefied petroleum gas）やＬＮＧ（liquefied natural gas）、アンモニア等を貯留するタンクを有した船舶においては、定期点検等でドックに入る際に、タンクの中をガスフリーにする必要が有る。その際、ＬＰＧ、ＬＮＧ及びアンモニア等に酸素が触れることを防止するため、一般に、不活性な窒素ガスなどの不活性ガスに置き換えてタンク内をイナートガスで満たすイナーティング工程が行われる。このイナーティング工程は、点検等の後にタンクへ貯蔵する前にも行われ、この場合、タンク内の空気がイナートガスに置き換えられる。特許文献１には、油輸送船の油槽内にイナートガスを供給可能な船舶が記載されている。 On ships with tanks that store LPG (liquefied petroleum gas), LNG (liquefied natural gas), ammonia, etc., it is necessary to make the inside of the tank gas-free when entering the dock for periodic inspections. At that time, in order to prevent oxygen from coming into contact with LPG, LNG, ammonia, etc., generally, an inerting process is performed in which inert gas such as inert nitrogen gas is substituted and the inside of the tank is filled with inert gas. This inerting process is also performed after inspection and before storage in the tank, and in this case, the air in the tank is replaced with inert gas. Patent Literature 1 describes a ship capable of supplying inert gas into an oil tank of an oil transport ship.
実開昭５８－１６４９９９号公報Japanese Utility Model Laid-Open No. 58-164999
　特許文献１のようにタンクを備えた浮体では、イナーティング工程によってタンクから排出される排出ガスをそのまま大気放出すると、周囲環境に影響を及ぼす可能性が有るため、これらを燃焼させる等の除害処理をするガス処理設備が浮体上に設けられている。
　しかしながら、ガス処理設備は、イナーティング工程で発生する排出ガス量に応じた大型のガス処理装置が必要になる。また、タンクをガスフリーにする頻度は、２年から３年に一度など低頻度である。
　そのため、浮体上のスペース確保が困難になると共に、重心を下げてスタビリティーを改善することが困難になる、という課題がある。 In a floating body equipped with a tank as in Patent Document 1, if the exhaust gas discharged from the tank during the inerting process is released into the atmosphere as it is, it may affect the surrounding environment. A gas processing facility for processing is provided on the floating body.
However, the gas treatment facility requires a large-sized gas treatment device corresponding to the amount of exhaust gas generated in the inerting process. Also, the frequency of making the tank gas-free is low, such as once every two to three years.
As a result, it becomes difficult to secure a space above the floating body, and it becomes difficult to improve stability by lowering the center of gravity.
　本開示は、上記事情に鑑みてなされたものであり、船上スペースの有効活用ならびにスタビリティーの改善が可能な浮体のガス処理方法及び浮体を提供するものである。 The present disclosure has been made in view of the above circumstances, and provides a floating body gas processing method and a floating body that enable effective use of shipboard space and improved stability.
　上記の課題を解決するために以下の構成を採用する。
　本開示の第一態様によれば、浮体のガス処理方法は、浮体に設けられたガスタンクの内部を不活性ガスに置き換える際に排出される排出ガスを除害する浮体のガス処理方法であって、前記排出ガスを除害可能な複数台の処理装置を準備する処理装置準備工程と、前記処理装置準備工程で準備した複数台の前記処理装置の中から、一つの浮体で排出される前記排出ガスの量に応じた少なくとも一台以上の前記処理装置を選択する処理装置選択工程と、前記処理装置選択工程で選択した台数分の前記処理装置を前記浮体と、前記浮体とは異なる他の浮体との少なくとも一方に設置する処理装置設置工程と、前記処理装置設置工程で設置した前記処理装置を用いて前記浮体の前記排出ガスを処理する処理工程と、を含む。 In order to solve the above problems, the following configuration is adopted.
According to the first aspect of the present disclosure, a floating body gas treatment method is a floating body gas treatment method for abatement of exhaust gas discharged when replacing the inside of a gas tank provided in the floating body with an inert gas, a treatment equipment preparation step of preparing a plurality of treatment equipment capable of abatement of the exhaust gas; A processing device selection step of selecting at least one or more of the processing devices according to the amount of gas, and the number of the processing devices selected in the processing device selection step as the floating body and another floating body different from the floating body. and a treatment step of treating the exhaust gas from the floating body using the treatment equipment installed in the treatment equipment installation step.
　本開示の第二態様によれば、浮体は、浮体本体と、前記浮体本体に設けられ、液化ガスを貯留可能なガスタンクと、前記浮体本体に対して着脱可能に設置され、前記ガスタンクから排出される排出ガスを除害する複数の処理装置と、を備え、前記複数の処理装置は、前記ガスタンクに対して並列に接続される。 According to the second aspect of the present disclosure, the floating body includes a floating body body, a gas tank provided in the floating body body and capable of storing liquefied gas, and a floating body detachably installed in the floating body body and discharged from the gas tank. and a plurality of treatment devices for abatement of exhaust gas, wherein the plurality of treatment devices are connected in parallel to the gas tank.
　本開示の第三態様によれば、浮体は、浮体本体と、前記浮体本体に対して着脱可能に設置され、他の浮体に設けられている液化ガスを貯留可能なガスタンクから排出される排出ガスを除害する複数の処理装置と、を備え、前記複数の処理装置は、前記ガスタンクに対して並列に接続される。 According to the third aspect of the present disclosure, the floating body includes a floating body body, and an exhaust gas discharged from a gas tank that is detachably installed on the floating body body and is provided in another floating body and capable of storing liquefied gas. and a plurality of treatment devices for abatement of the gas, and the plurality of treatment devices are connected in parallel to the gas tank.
　本開示に係る浮体のガス処理方法及び浮体によれば、船上スペースの有効活用ならびにスタビリティーの改善をすることが可能となる。 According to the floating body gas processing method and the floating body according to the present disclosure, it is possible to effectively utilize the onboard space and improve the stability.
この第一実施形態の浮体の概略構成を示す構成図である。It is a block diagram which shows schematic structure of the floating body of this 1st embodiment. 本開示の第一実施形態における浮体のタンク内点検準備関連機器の概略構成を示す図である。FIG. 2 is a diagram showing a schematic configuration of a floating body tank interior inspection preparation related equipment according to the first embodiment of the present disclosure; 本開示の第一実施形態における浮体の排出ガス処理作業のフローチャートである。4 is a flow chart of an exhaust gas processing operation of a floating body in the first embodiment of the present disclosure; 本開示の第一実施形態における不活性ガス供給作業のフローチャートである。4 is a flow chart of an inert gas supply operation in the first embodiment of the present disclosure; 本開示の第二実施形態における図２に相当する図である。FIG. 3 is a diagram corresponding to FIG. 2 in the second embodiment of the present disclosure; 本開示の第二実施形態における浮体の排出ガス処理作業のフローチャートである。6 is a flow chart of the exhaust gas processing operation of the floating body in the second embodiment of the present disclosure. 本開示の第二実施形態における不活性ガス供給作業のフローチャートである。6 is a flow chart of an inert gas supply operation in the second embodiment of the present disclosure; 本開示の第一実施形態の変形例における図２に相当する図である。FIG. 3 is a diagram corresponding to FIG. 2 in a modification of the first embodiment of the present disclosure; 本開示の第二実施形態の変形例における図５に相当する図である。FIG. 6 is a diagram corresponding to FIG. 5 in a modification of the second embodiment of the present disclosure;
　次に、本開示の第一実施形態における浮体のガス処理方法及び浮体を図面に基づき説明する。
　本実施形態における浮体としては、液化ガスであるアンモニアを燃料とするいわゆるアンモニア燃料船を一例に説明する。 Next, a floating body gas processing method and a floating body in the first embodiment of the present disclosure will be described based on the drawings.
As a floating body in the present embodiment, a so-called ammonia fuel ship using ammonia, which is a liquefied gas, as fuel will be described as an example.
〈第一実施形態〉
　図１は、この第一実施形態の浮体の概略構成を示す構成図である。なお、図１において、浮体の船首尾方向ＡＦを矢印で示している。
　図１に示すように、第一実施形態における浮体１は、浮体本体２と、カーゴタンク３と、エンジン４と、上部構造５と、ガス燃料タンク（ガスタンク）６と、不活性ガス供給装置２０と、処理装置２１と、を備えている。 <First embodiment>
FIG. 1 is a configuration diagram showing a schematic configuration of the floating body of this first embodiment. In addition, in FIG. 1, the bow-to-stern direction AF of the floating body is indicated by an arrow.
As shown in FIG. 1, the floating body 1 in the first embodiment includes a floating body body 2, a cargo tank 3, an engine 4, an upper structure 5, a gas fuel tank (gas tank) 6, and an inert gas supply device 20. and a processing device 21 .
　浮体本体２は、一対の舷側７（図１中、右舷側のみ示す）と、船底８と、上甲板９と、を有している。上甲板９は、最も上方に位置する全通甲板であって、この実施形態における浮体本体２では、暴露甲板である。また、浮体本体２の内部には、カーゴホールド１０と、主機室１１とが区画されている。さらに、浮体本体２は、船尾２Ａの下方にスクリュー１２と舵１３とを備えている。 The floating body body 2 has a pair of sideboards 7 (only the starboard side is shown in FIG. 1), a ship bottom 8, and an upper deck 9. The upper deck 9 is the uppermost all-through deck, and is an exposed deck in the floating body 2 in this embodiment. In addition, a cargo hold 10 and a main engine room 11 are partitioned inside the floating body body 2 . Further, the floating body body 2 has a screw 12 and a rudder 13 below the stern 2A.
　カーゴホールド１０は、カーゴタンク３を収容する空間である。この実施形態で例示する浮体１は、船首２Ｆから船尾２Ａに向かって複数（より具体的には、３つ）のカーゴホールド１０が並んで配置されている。これらカーゴホールド１０は、仕切壁１０ａによって、それぞれ船首尾方向ＡＦに区画されている。 The cargo hold 10 is a space that accommodates the cargo tank 3. A floating body 1 exemplified in this embodiment has a plurality of (more specifically, three) cargo holds 10 arranged side by side from a bow 2F to a stern 2A. These cargo holds 10 are partitioned in the fore-and-aft direction AF by partition walls 10a.
　主機室１１は、エンジン４を収容する区画であり、カーゴホールド１０よりも船尾２Ａに近い側に配置されている。また、主機室１１は、上部構造５の下方に配置されている。この実施形態における主機室１１は、二重底を形成する内側の底板１４と、その一つ上に形成された甲板１５とにより上下が区画されている。 The main engine room 11 is a section that houses the engine 4, and is arranged closer to the stern 2A than the cargo hold 10. Further, the main engine room 11 is arranged below the upper structure 5 . The main engine room 11 in this embodiment is partitioned vertically by an inner bottom plate 14 forming a double bottom and a deck 15 formed one above the bottom plate 14 .
　カーゴタンク３は、例えば、液化ガス（アンモニア、ＬＰＧ、ＬＮＧ等）を積荷として貯蔵可能なタンクである。カーゴタンク３は、上述した複数のカーゴホールド１０にそれぞれ一つずつ収容されている。すなわち、カーゴタンク３も、カーゴホールド１０と同様に船首尾方向ＡＦに並んで複数配置されている。 The cargo tank 3 is a tank that can store, for example, liquefied gas (ammonia, LPG, LNG, etc.) as cargo. The cargo tanks 3 are accommodated one by one in the plurality of cargo holds 10 described above. That is, like the cargo holds 10, the cargo tanks 3 are also arranged side by side in the fore-and-aft direction AF.
　エンジン４は、アンモニアを燃料として駆動可能とされている。エンジン４は、スクリュー１２を回転させて推力を発生させる。エンジン４は、上述した主機室１１に収容されている。ここで、エンジン４の燃料は、アンモニアのみに限られず、アンモニアと他の燃料（軽油等）との併用（バイフューエル）や、混合（デュアルフューエル）等であってもよい。さらに、エンジン４は、スクリュー１２を駆動するものに限られない。例えば、エンジン４によって発電機を駆動するようにしても良い。このエンジン４は、通常は、ガス燃料タンク６に貯蔵されたアンモニアを用いて駆動される。 The engine 4 can be driven using ammonia as fuel. The engine 4 rotates the screw 12 to generate thrust. The engine 4 is accommodated in the main engine room 11 mentioned above. Here, the fuel of the engine 4 is not limited to ammonia alone, and ammonia and other fuels (such as light oil) may be used together (bi-fuel) or mixed (dual-fuel). Furthermore, the engine 4 is not limited to driving the screw 12 . For example, the engine 4 may drive a generator. This engine 4 is normally driven using ammonia stored in a gas fuel tank 6 .
　上部構造５は、上甲板９の上に形成されており、船橋や居住区等を備えている。この上部構造５は、船首尾方向でカーゴホールド１０よりも船尾２Ａに近い側となる位置で、且つ主機室１１の上方となる位置に配置されている。 The superstructure 5 is formed on the upper deck 9 and has a bridge, living quarters, etc. The upper structure 5 is arranged at a position closer to the stern 2A than the cargo hold 10 in the fore-and-aft direction and above the main engine room 11 .
　ガス燃料タンク６は、上述したエンジン４の燃料である液化アンモニアを貯蔵する。この実施形態におけるガス燃料タンク６は、上甲板９の上に設置されている場合を例示している。また、この実施形態の浮体１において、ガス燃料タンク６は、円柱状の圧力タンクである、いわゆるＴｙｐｅ－Ｃタンクであり、その長手方向が船首尾方向ＡＦと一致する姿勢で配置されている場合を例示している。なお、ガス燃料タンク６は、上記の形状、個数及び配置に限られるものでは無い。 The gas fuel tank 6 stores liquefied ammonia, which is the fuel for the engine 4 described above. The gas fuel tank 6 in this embodiment is installed on the upper deck 9 as an example. In addition, in the floating body 1 of this embodiment, the gas fuel tank 6 is a so-called Type-C tank, which is a cylindrical pressure tank. is exemplified. The gas fuel tank 6 is not limited to the above shape, number and arrangement.
　不活性ガス供給装置２０は、浮体本体２に対して着脱可能に設置されている。不活性ガス供給装置２０は、ガス燃料タンク６をガスフリーにするタンク内点検準備の際、ガス燃料タンク６に対して不活性ガスを供給可能に構成されている。不活性ガスとしては、窒素を例示できる。また不活性ガス供給装置２０は、ガス燃料タンク６内の不活性ガスを空気に置換するべく、空気を供給可能に構成されても良い。 The inert gas supply device 20 is detachably installed on the floating body main body 2 . The inert gas supply device 20 is configured to be able to supply inert gas to the gas fuel tank 6 when preparing to inspect the inside of the gas fuel tank 6 to make the gas fuel tank 6 gas-free. Nitrogen can be exemplified as an inert gas. Further, the inert gas supply device 20 may be configured to supply air so as to replace the inert gas in the gas fuel tank 6 with air.
　本実施形態の不活性ガス供給装置２０は、上甲板９の上に着脱可能に設置されている場合を例示している。また、本実施形態の不活性ガス供給装置２０は、ＩＳＯ規格の海上コンテナに収容されている場合を例示しているが、ＩＳＯ規格の海上コンテナに収容されたものに限られない。 The inert gas supply device 20 of this embodiment is detachably installed on the upper deck 9 as an example. Moreover, although the inert gas supply device 20 of the present embodiment is housed in an ISO standard marine container, it is not limited to being housed in an ISO standard marine container.
　処理装置２１は、浮体本体２に対して着脱可能に設置されている。処理装置２１は、ガス燃料タンク６をガスフリーにするイナーティングの際に、ガス燃料タンク６から排出される排出ガスを除害可能に構成されている。ここで、排出ガスの除害を行う手法としては、処理装置２１に導入された排出ガスを燃焼させる燃焼除害を例示できる。 The processing device 21 is detachably installed with respect to the floating body main body 2 . The processing device 21 is configured to be able to abate the exhaust gas discharged from the gas fuel tank 6 during inerting to make the gas fuel tank 6 gas-free. Here, combustion abatement in which the exhaust gas introduced into the processing device 21 is combusted can be exemplified as a method for abatement of the exhaust gas.
　本実施形態の処理装置２１は、上甲板９の上に着脱可能に設置されている場合を例示している。より具体的には、本実施形態の処理装置２１は、上記の不活性ガス供給装置２０と同様に、ＩＳＯ規格の海上コンテナに収容されている。処理装置２１が海上コンテナに収容されている場合、海上コンテナ内には、例えば、燃焼除害装置（図示せず）、燃焼除害装置の燃料を貯留する燃料タンク（図示せず）など、排出ガスを除害するための装置が一式収容される。 The processing device 21 of this embodiment is detachably installed on the upper deck 9 as an example. More specifically, the treatment device 21 of this embodiment is housed in an ISO standard marine container, like the inert gas supply device 20 described above. When the treatment device 21 is housed in a marine container, the marine container contains, for example, a combustion abatement device (not shown), a fuel tank (not shown) for storing fuel for the combustion abatement device, and the like. It houses a set of equipment for gas abatement.
　本実施形態の処理装置２１は、上記不活性ガス供給装置２０の上に積み重ねて設置（スタッキング）されている。これら不活性ガス供給装置２０及び処理装置２１は、岸壁などに設けられたコンテナ荷役用のクレーンを用いて、浮体本体２に対して設置及び撤去が可能となっている。なお、処理装置２１のコンテナサイズと不活性ガス供給装置２０のコンテナサイズとが同一の場合を示しているが、これらコンテナサイズは、同一に限られない。 The processing device 21 of the present embodiment is stacked (stacked) on the inert gas supply device 20 . The inert gas supply device 20 and the treatment device 21 can be installed and removed from the floating body 2 using a container handling crane installed on a quay or the like. Although a case where the container size of the processing device 21 and the container size of the inert gas supply device 20 are the same is shown, these container sizes are not limited to the same.
　本実施形態の浮体本体２の上甲板９には、これら処理装置２１と不活性ガス供給装置２０とを積載する専用スペース１６が予め確保されている。そして、上甲板９は、これら処理装置２１及び不活性ガス供給装置２０を支持可能に補強されている。図示を省略するが、上記専用スペース１６の周囲には、処理装置２１とガス燃料タンク６とを連通させるための配管（図示せず）、及び不活性ガス供給装置２０とガス燃料タンク６とを連通させるための配管の各接続端部（図示せず）を設けてもよい。 On the upper deck 9 of the floating body main body 2 of this embodiment, a dedicated space 16 for loading the processing device 21 and the inert gas supply device 20 is secured in advance. The upper deck 9 is reinforced so as to be able to support the treatment device 21 and the inert gas supply device 20 . Although illustration is omitted, piping (not shown) for communicating the processing device 21 and the gas fuel tank 6, and the inert gas supply device 20 and the gas fuel tank 6 are arranged around the dedicated space 16. Each connecting end of the tubing (not shown) may be provided for communication.
　図２は、本開示の第一実施形態における浮体のタンク内点検準備関連機器の概略構成を示す図である。
　図２に示すように、本実施形態の浮体１は、複数のガス燃料タンク６と、これらガス燃料タンク６からの排出ガスを導く排出ガス配管２５と、複数のガス燃料タンク６に不活性ガスを導く不活性ガス供給管２６と、を有している。 FIG. 2 is a diagram showing a schematic configuration of a floating body tank interior inspection preparation related equipment according to the first embodiment of the present disclosure.
As shown in FIG. 2, the floating body 1 of this embodiment includes a plurality of gas fuel tanks 6, an exhaust gas pipe 25 for guiding the exhaust gas from these gas fuel tanks 6, and an inert gas in the plurality of gas fuel tanks 6. and an inert gas supply pipe 26 for guiding the .
　排出ガス配管２５は、排出ガス枝管２７と、排出ガス主配管２８を備えている。排出ガス枝管２７は、複数のガス燃料タンク６からそれぞれ延びている。これら排出ガス枝管２７は、排出ガス主配管２８に合流接続されている。排出ガス主配管２８は、その端部に、複数の処理装置２１に対して排出ガスを分配する分配接続部３０を備えている。 The exhaust gas pipe 25 includes an exhaust gas branch pipe 27 and an exhaust gas main pipe 28 . Exhaust gas branch pipes 27 extend from the plurality of gas fuel tanks 6 respectively. These exhaust gas branch pipes 27 are joined and connected to the exhaust gas main pipe 28 . The exhaust gas main line 28 is provided at its end with a distribution connection 30 for distributing the exhaust gas to a plurality of treatment units 21 .
　一方で、処理装置２１は、それぞれ排出ガスを導入するための導入ライン３１を備えている。導入ライン３１の入口端３１ｓは、分配接続部３０に着脱可能とされている。図２では、ガス燃料タンク６以外の配管パージにより排出される流体やカーゴタンク３から排出される気化ガスなどを処理する小型処理装置３３が、別途設けられている場合を例示している。なお、浮体１が二つのガス燃料タンク６を備える場合を一例にして説明したが、ガス燃料タンク６を一つだけ設けたり、三つ以上設けたりしてもよい。なお、図２では、導入ライン３１の入口端３１ｓを一つだけ示しているが、三つの導入ライン３１は、それぞれ入口端３１ｓを有しており、これら三つの入口端３１ｓが分配接続部３０にそれぞれ接続される（第二実施形態も同様）。 On the other hand, the processing equipment 21 includes an introduction line 31 for introducing the exhaust gas. An inlet end 31 s of the introduction line 31 is detachable from the distribution connection portion 30 . FIG. 2 illustrates a case where a small processing device 33 is separately provided for processing the fluid discharged by pipe purge other than the gas fuel tank 6 and the vaporized gas discharged from the cargo tank 3 . Although the case where the floating body 1 has two gas fuel tanks 6 has been described as an example, only one gas fuel tank 6 may be provided, or three or more gas fuel tanks 6 may be provided. Although only one inlet end 31s of the introduction line 31 is shown in FIG. are respectively connected to (the second embodiment is also the same).
　浮体本体２には、ガス燃料タンク６で排出される排出ガスの量に応じた一台以上の処理装置２１が設置されている。ガス燃料タンク６で排出される排出ガスの量は、ガス燃料タンク６の容量が大きいほど多くなり、ガス燃料タンク６の容量が小さいほど少なくなる。本実施形態の浮体１では、複数台（具体的には、３台）の処理装置２１が設置されるとともに、これら複数台の処理装置２１がガス燃料タンク６に対して並列に接続されている。これら複数台の処理装置２１の処理能力（体積流量）の合計は、一つの浮体１で排出される排出ガスの量（体積流量）を上回っている。また、本実施形態では、一つの浮体１に設置される複数台の処理装置２１の処理能力（体積流量）の合計と、一つの浮体１で排出される排出ガスの量との差分は、一台の処理装置２１の処理能力よりも小さくなっている。 One or more processing devices 21 are installed in the floating body body 2 according to the amount of exhaust gas discharged from the gas fuel tank 6 . The amount of exhaust gas discharged from the gas fuel tank 6 increases as the capacity of the gas fuel tank 6 increases, and decreases as the capacity of the gas fuel tank 6 decreases. In the floating body 1 of the present embodiment, a plurality of (specifically, three) processing devices 21 are installed, and these processing devices 21 are connected in parallel to the gas fuel tank 6. . The total processing capacity (volumetric flow rate) of these plurality of processing devices 21 exceeds the amount (volumetric flow rate) of exhaust gas discharged from one floating body 1 . Further, in the present embodiment, the difference between the total processing capacity (volumetric flow rate) of the plurality of treatment devices 21 installed in one floating body 1 and the amount of exhaust gas discharged from one floating body 1 is It is smaller than the processing capacity of the processing device 21 of the stand.
　不活性ガス供給管２６は、供給主配管３６と供給枝管３７とを備えている。供給主配管３６は、その入口端３６ｓに合流接続部３２を備えている。供給枝管３７は、供給主配管３６に分岐接続され、供給主配管３６とガス燃料タンク６とを連通している。
　一方で、不活性ガス供給装置２０は、不活性ガスを供給するための供給ライン３８を備えている。供給ライン３８の出口端３８ｏは、不活性ガス供給管２６の合流接続部３２に着脱可能とされている。なお、図２では、供給ライン３８の出口端３８ｏを一つだけ示しているが、三つの供給ライン３８は、それぞれ出口端３８ｏを有しており、これら三つの出口端３８ｏが合流接続部３２にそれぞれ接続される（第二実施形態も同様）。 The inert gas supply pipe 26 has a supply main pipe 36 and a supply branch pipe 37 . The main supply line 36 is provided with a merge connection 32 at its inlet end 36s. The supply branch pipe 37 is branched and connected to the main supply pipe 36 to communicate the main supply pipe 36 and the gas fuel tank 6 .
On the other hand, the inert gas supply device 20 has a supply line 38 for supplying inert gas. An outlet end 38 o of the supply line 38 is detachable from the confluence connection portion 32 of the inert gas supply pipe 26 . Although only one outlet end 38o of the supply line 38 is shown in FIG. are respectively connected to (the second embodiment is also the same).
　浮体本体２には、一つの浮体１で行うタンク内点検準備に必要な不活性ガス量（体積流量）に応じた少なくとも一台以上の不活性ガス供給装置２０が設置されている。上記のタンク内点検準備に必要な不活性ガス量は、ガス燃料タンク６の容量が大きいほど多くなり、ガス燃料タンク６の容量が小さいほど少なくなる。本実施形態の浮体１では、複数台（具体的には、３台）の不活性ガス供給装置２０が設置されると共に、これら複数台の不活性ガス供給装置２０がガス燃料タンク６に対して並列に接続されている。 The floating body main body 2 is equipped with at least one or more inert gas supply devices 20 corresponding to the amount of inert gas (volumetric flow rate) necessary for preparing for the inspection of the inside of the tank in one floating body 1 . The larger the capacity of the gas fuel tank 6, the larger the amount of inert gas required for preparation for the above-described tank interior inspection, and the smaller the capacity of the gas fuel tank 6, the smaller. In the floating body 1 of the present embodiment, a plurality of (specifically, three) inert gas supply devices 20 are installed, and these plurality of inert gas supply devices 20 are connected to the gas fuel tank 6. connected in parallel.
（浮体のガス処理方法）
　次に、本実施形態における浮体１のガス処理方法について図面を参照しながら説明する。本実施形態の浮体のガス処理方法は、処理装置２１による排出ガス処理作業と、不活性ガス供給装置２０による不活性ガス供給作業とを並行して行っている。
（排出ガス処理作業）
　図３は、本開示の第一実施形態における浮体の排出ガス処理作業のフローチャートである。
　図３に示すように、本実施形態における浮体のガス処理方法における排出ガス処理作業は、少なくとも処理装置準備工程（ステップＳ１１）と、処理装置選択工程（ステップＳ１２）と、処理装置設置工程（ステップＳ１３）と、処理工程（ステップＳ１４）と、を含んでいる。本実施形態における浮体のガス処理方法は、更に、処理装置撤去工程（ステップＳ１５）と、処理装置保管工程（ステップＳ１６）と、を含んでいる。 (Gas processing method for floating body)
Next, a gas processing method for the floating body 1 according to this embodiment will be described with reference to the drawings. In the floating body gas treatment method of the present embodiment, the exhaust gas treatment operation by the treatment device 21 and the inert gas supply operation by the inert gas supply device 20 are performed in parallel.
(Exhaust gas treatment work)
FIG. 3 is a flow chart of a floating body exhaust gas treatment operation in the first embodiment of the present disclosure.
As shown in FIG. 3, the exhaust gas treatment work in the floating body gas treatment method in the present embodiment includes at least a treatment equipment preparation step (step S11), a treatment equipment selection step (step S12), and a treatment equipment installation step (step S13) and a processing step (step S14). The floating body gas processing method of the present embodiment further includes a processing device removal step (step S15) and a processing device storage step (step S16).
　まず、処理装置準備工程（ステップＳ１１）では、排出ガスを除害可能な複数台の処理装置２１を準備する。より具体的には、ウォーミングアップ、タンク内点検準備を行うことでガス燃料タンク６から排出される排出ガスに含まれるアンモニアガスを除害可能な多数の処理装置２１を準備する。これら準備した処理装置２１は、所定の保管場所に保管され、使用する際に所定の保管場所から持ち出されて、使用後に所定の保管場所へ戻されるように運用される。そして、浮体１が定期点検等でドックに入るなど、ガス燃料タンク６をガスフリーにする際に、処理装置選択工程（ステップＳ１２）へ進む。 First, in the processing device preparation step (step S11), a plurality of processing devices 21 capable of abatement of exhaust gas are prepared. More specifically, a large number of treatment devices 21 capable of removing the ammonia gas contained in the exhaust gas discharged from the gas fuel tank 6 are prepared by warming up and preparing for inspection inside the tank. These prepared processing apparatuses 21 are stored in a predetermined storage place, taken out from the predetermined storage place when used, and returned to the predetermined storage place after use. Then, when the gas fuel tank 6 is made gas-free, such as when the floating body 1 enters the dock for periodic inspection or the like, the process advances to the processing device selection step (step S12).
　処理装置選択工程（ステップＳ１２）では、上記の処理装置準備工程（ステップＳ１１）で準備した複数台の処理装置２１の中から、一つの浮体で排出される排出ガスの量に応じた少なくとも一台以上の処理装置２１を選択する。すなわち、ウォーミングアップ、タンク内点検準備が行われる一つの浮体で使用する処理装置２１の台数を決定し、当該台数の処理装置２１を、保管されている多数の処理装置２１の中から選択する。これら選択した処理装置２１は、上記のウォーミングアップ、タンク内点検準備が行われる浮体１へ向けて運搬される。 In the processing device selection step (step S12), at least one processing device corresponding to the amount of exhaust gas discharged from one floating body is selected from among the plurality of processing devices 21 prepared in the processing device preparation step (step S11). The above processing device 21 is selected. That is, the number of processing units 21 to be used in one floating body for which warm-up and tank interior inspection preparations are performed is determined, and that number of processing units 21 is selected from a large number of stored processing units 21 . These selected processing equipments 21 are transported to the floating body 1 where the warm-up and preparation for inspection of the inside of the tank are performed.
　処理装置設置工程（ステップＳ１３）では、上記の処理装置選択工程（ステップＳ１２）で選択した台数分の処理装置２１を浮体１に設置する。本実施形態では、浮体１の上甲板９の上の専用スペース１６に処理装置２１を設置する。また、複数台の処理装置２１を設置する場合には、上甲板９上に設置された処理装置２１の上に他の処理装置２１を積み重ねて（スタッキングして）設置する。また、複数台の処理装置２１を設置する場合には、ガス燃料タンク６に対して複数台の処理装置２１を並列に接続する。 In the processing device installation step (step S13), the processing devices 21 corresponding to the number selected in the processing device selection step (step S12) are installed on the floating body 1. In this embodiment, a processing device 21 is installed in a dedicated space 16 above the upper deck 9 of the floating body 1 . When a plurality of processing apparatuses 21 are installed, the other processing apparatuses 21 are stacked (stacked) on the processing apparatus 21 installed on the upper deck 9 . Moreover, when installing a plurality of processing apparatuses 21 , the plurality of processing apparatuses 21 are connected in parallel to the gas fuel tank 6 .
　処理工程（ステップＳ１４）では、上記の処理装置設置工程（ステップＳ１３）で設置した処理装置２１を用いて浮体１の排出ガスを処理する。すなわち、ウォーミングアップ、タンク内点検準備によってガス燃料タンク６から排出された排出ガスを、処理装置２１へ導いて、処理装置２１により燃焼除害などの除害処理を行った後、大気放出する。なお、本実施形態は、浮体１に常設された不活性ガス供給装置２０を使用するのではなく、処理装置２１と同様に、所定の保管場所に保管されている不活性ガス供給装置２０を使用している。そのため、処理工程（ステップＳ１４）は、後述する不活性ガス供給装置２０による供給工程（ステップＳ２４）が実施されるタイミングに合わせて実施される。 In the treatment step (step S14), the exhaust gas from the floating body 1 is treated using the treatment device 21 installed in the treatment device installation step (step S13). That is, the exhaust gas discharged from the gas fuel tank 6 during warm-up and preparation for inspection inside the tank is guided to the processing device 21, and after being subjected to a detoxification treatment such as combustion detoxification by the processing device 21, it is released to the atmosphere. In this embodiment, instead of using the inert gas supply device 20 permanently installed in the floating body 1, the inert gas supply device 20 stored in a predetermined storage place is used like the processing device 21. are doing. Therefore, the processing step (step S14) is performed in accordance with the timing when the supply step (step S24) by the inert gas supply device 20, which will be described later, is performed.
　処理装置撤去工程（ステップＳ１５）では、上記の処理工程（ステップＳ１４）が完了した後に、処理装置２１を浮体１から撤去する。ここで、処理工程（ステップＳ１４）は、定期点検等で浮体がドックに入る前に、ガス燃料タンク６内の気体を不活性ガスに置き換えて、さらにこの不活性ガスを空気に置き換えた時点で完了する。 In the processing device removal step (step S15), the processing device 21 is removed from the floating body 1 after the above processing step (step S14) is completed. Here, in the processing step (step S14), the gas in the gas fuel tank 6 is replaced with an inert gas before the floating body enters the dock for periodic inspection or the like, and the inert gas is replaced with air. complete.
　その後、処理装置保管工程（ステップＳ１６）では、上記の処理装置撤去工程（ステップＳ１５）で撤去した処理装置２１を保管する。すなわち、浮体１から撤去された処理装置２１を運搬して、上述した所定の保管場所に、他の多数の処理装置２１と共に保管する。 After that, in the processing device storage step (step S16), the processing device 21 removed in the processing device removal step (step S15) is stored. That is, the processing device 21 removed from the floating body 1 is transported and stored together with a large number of other processing devices 21 at the predetermined storage location described above.
（不活性ガス供給作業）
　図４は、本開示の第一実施形態における不活性ガス供給作業のフローチャートである。
　図４に示すように、本実施形態における浮体のガス処理方法は、上記の排出ガス処理作業に加えて、不活性ガス供給作業を行う。不活性ガス供給作業は、不活性ガス供給装置準備工程（ステップＳ２１）と、不活性ガス供給装置選択工程（ステップＳ２２）と、不活性ガス供給装置設置工程（ステップＳ２３）と、供給工程（ステップＳ２４）と、を含んでいる。さらに、本実施形態の不活性ガス供給作業は、不活性ガス供給装置撤去工程（ステップＳ２５）と、不活性ガス供給装置保管工程（ステップＳ２６）と、を含んでいる。 (inert gas supply work)
FIG. 4 is a flow chart of inert gas supply operation in the first embodiment of the present disclosure.
As shown in FIG. 4, the floating body gas treatment method according to the present embodiment performs an inert gas supply operation in addition to the exhaust gas treatment operation described above. The inert gas supply operation includes an inert gas supply device preparation step (step S21), an inert gas supply device selection step (step S22), an inert gas supply device installation step (step S23), and a supply step (step S24) and. Furthermore, the inert gas supply operation of the present embodiment includes an inert gas supply device removal step (step S25) and an inert gas supply device storage step (step S26).
　まず、不活性ガス供給装置準備工程（ステップＳ２１）では、ガス燃料タンク６の内部に不活性ガスを供給可能な複数台の不活性ガス供給装置２０を準備する。この準備した不活性ガス供給装置２０は、所定の保管場所に保管され、使用する際に所定の保管場所から持ち出されて、使用後に所定の保管場所へ戻されるように運用される。そして、浮体１が定期点検等でドックに入るなど、ガス燃料タンク６をガスフリーにする際に、不活性ガス供給装置選択工程（ステップＳ２２）へ進む。 First, in the inert gas supply device preparation step (step S21), a plurality of inert gas supply devices 20 capable of supplying inert gas to the inside of the gas fuel tank 6 are prepared. The prepared inert gas supply device 20 is stored in a predetermined storage place, taken out from the predetermined storage place when used, and returned to the predetermined storage place after use. Then, when the gas fuel tank 6 is to be gas-free, such as when the floating body 1 enters the dock for periodic inspection or the like, the process proceeds to the inert gas supply device selection step (step S22).
　不活性ガス供給装置選択工程（ステップＳ２２）では、上記の不活性ガス供給装置準備工程（ステップＳ２１）で準備した複数台の不活性ガス供給装置２０の中から、一つの浮体１で必要になる不活性ガスの量に応じた少なくとも一台以上の不活性ガス供給装置２０を選択する。すなわち、タンク内点検準備が行われる一つの浮体１で使用する不活性ガス供給装置２０の台数を決定し、当該台数の不活性ガス供給装置２０を、保管されている多数の不活性ガス供給装置２０の中から選択する。これら選択した不活性ガス供給装置２０は、上記のタンク内点検準備が行われる浮体１へ向けて運搬される。なお、不活性ガス供給装置２０の保管場所と、上述した処理装置２１の保管場所とは同一の保管場所であってもよい。 In the inert gas supply device selection step (step S22), one of the inert gas supply devices 20 prepared in the inert gas supply device preparation step (step S21) is required for one floating body 1. At least one or more inert gas supply devices 20 are selected according to the amount of inert gas. That is, the number of inert gas supply devices 20 to be used in one floating body 1 for which tank interior inspection preparations are to be performed is determined, and the number of inert gas supply devices 20 that are to be used is transferred to a large number of stored inert gas supply devices. 20 to choose from. These selected inert gas supply devices 20 are transported toward the floating body 1 where preparations for the tank interior inspection are made. The storage location of the inert gas supply device 20 and the storage location of the processing device 21 may be the same storage location.
　不活性ガス供給装置設置工程（ステップＳ２３）では、上記の不活性ガス供給装置選択工程（ステップＳ２２）で選択した台数分の不活性ガス供給装置２０を浮体１に設置する。本実施形態では、浮体１の上甲板９の上の専用スペース１６に不活性ガス供給装置２０を設置する。また、複数台の不活性ガス供給装置２０を設置する場合には、上甲板９上に設置された不活性ガス供給装置２０の上に他の処理装置２１を積み重ねて（スタッキングして）設置してもよい。さらに、不活性ガス供給装置２０を処理装置２１の上に積み重ねたり、不活性ガス供給装置２０の上に処理装置２１を積み重ねたりしてもよい。また、複数台の不活性ガス供給装置２０を設置する場合には、ガス燃料タンク６に対して複数台の不活性ガス供給装置２０を並列に接続する。 In the inert gas supply device installation step (step S23), the number of inert gas supply devices 20 selected in the inert gas supply device selection step (step S22) is installed on the floating body 1. In this embodiment, an inert gas supply device 20 is installed in a dedicated space 16 above the upper deck 9 of the floating body 1 . When installing a plurality of inert gas supply devices 20, the other processing devices 21 are stacked (stacked) on the inert gas supply device 20 installed on the upper deck 9. may Furthermore, the inert gas supply device 20 may be stacked on the processing device 21 or the processing device 21 may be stacked on the inert gas supply device 20 . When installing a plurality of inert gas supply devices 20 , the plurality of inert gas supply devices 20 are connected in parallel to the gas fuel tank 6 .
　供給工程（ステップＳ２４）では、上記の供給工程（ステップＳ２４）で設置した不活性ガス供給装置２０を用いて浮体１のガス燃料タンク６へ不活性ガスを供給する。なお、この供給工程（ステップＳ２４）による不活性ガス供給作業開始後にガス燃料タンク６から排出ガスが排出されるため、上述した処理工程（ステップＳ１４）では、この排出ガスを処理する。 In the supply step (step S24), the inert gas is supplied to the gas fuel tank 6 of the floating body 1 using the inert gas supply device 20 installed in the supply step (step S24). Since exhaust gas is discharged from the gas fuel tank 6 after the start of the inert gas supply operation in this supply step (step S24), this exhaust gas is treated in the above-described treatment step (step S14).
　不活性ガス供給装置撤去工程（ステップＳ２５）では、上記の供給工程（ステップＳ２４）が完了した後に、不活性ガス供給装置２０を浮体１から撤去する。ここで、供給工程（ステップＳ２４）は、定期点検等を終えた浮体が、ガス燃料タンク６内の空気を不活性ガスに置き換えた時点で完了するが、定期点検後の空気を不活性ガスに置換する作業を燃料ガス取入れ基地等で実施する場合は、ガス燃料タンク６内の不活性ガスを空気に置換した時点で完了する。 In the inert gas supply device removal step (step S25), the inert gas supply device 20 is removed from the floating body 1 after the above supply step (step S24) is completed. Here, the supply step (step S24) is completed when the air in the gas fuel tank 6 is replaced with the inert gas after the periodic inspection, etc. of the floating body. When the replacement work is carried out at a fuel gas intake base or the like, the work is completed when the inert gas in the gas fuel tank 6 is replaced with air.
　その後、不活性ガス供給装置保管工程（ステップＳ２６）では、上記の不活性ガス供給装置撤去工程（ステップＳ２５）で撤去した不活性ガス供給装置２０を保管する。すなわち、浮体１から撤去された不活性ガス供給装置２０を運搬して、上述した所定の保管場所に、他の多数の不活性ガス供給装置２０と共に保管する。 After that, in the inert gas supply device storage step (step S26), the inert gas supply device 20 removed in the inert gas supply device removal step (step S25) is stored. That is, the inert gas supply device 20 removed from the floating body 1 is transported and stored together with many other inert gas supply devices 20 at the predetermined storage location described above.
（作用効果）
　上記第一実施形態によれば、例えば、定期点検時などにガス燃料タンク６をガスフリーにする必要がある際にだけ、ガス燃料タンク６から排出される排出ガス量に応じた台数の処理装置２１を、浮体１に設置して、浮体１の排出ガスを処理することが可能となる。そのため、ガス燃料タンク６内から排出される排出ガスを処理するための大型の処理装置を浮体１に常時備え付ける必要が無くなるため、初期設備投資、設置スペース、重心が上がる事を抑えることができる。また、排出ガスを処理するための処理設備を備えた陸上設備や処理設備を備えたバンカー船を占有することもなくなる。 (Effect)
According to the first embodiment, for example, only when it is necessary to make the gas fuel tank 6 gas-free during periodic inspections, the number of processing devices corresponding to the amount of exhaust gas discharged from the gas fuel tank 6 21 can be installed on the floating body 1 to treat the exhaust gas of the floating body 1. Therefore, it is not necessary to constantly equip the floating body 1 with a large-sized processing device for processing the exhaust gas discharged from the gas fuel tank 6, so that initial equipment investment, installation space and center of gravity can be suppressed. In addition, there is no need to occupy a land facility or a bunker ship equipped with a treatment facility for treating the exhaust gas.
　上記第一実施形態では、更に、複数台の処理装置２１をガス燃料タンク６に並列に接続しているため、小型の処理装置２１を用いつつガス燃料タンク６から排出される排出ガスを迅速に処理することが可能となる。また、複数の処理装置２１を並列に接続して用いるため、一つの大型の処理装置２１を用いる場合と同等の処理性能を確保しつつ、一つ当たりの処理装置２１の大きさを低減できる。したがって、処理装置２１の着脱作業に掛かる作業者の負担を軽減できる。 In the above-described first embodiment, furthermore, since a plurality of processing devices 21 are connected in parallel to the gas fuel tank 6, exhaust gas discharged from the gas fuel tank 6 can be rapidly removed while using a small processing device 21. can be processed. In addition, since a plurality of processing devices 21 are connected in parallel and used, the size of each processing device 21 can be reduced while ensuring the same processing performance as when using one large processing device 21 . Therefore, it is possible to reduce the burden on the operator involved in attaching and detaching the processing device 21 .
　上記第一実施形態では、更に、排出ガスの処理が完了した後には、処理装置２１を浮体１から撤去して保管すればよいため、別の浮体でガス燃料タンク６をガスフリーにする必要が生じた場合に、保管されている処理装置２１を使用することができる。したがって、処理装置２１の稼働率を向上することができる。 In the above-described first embodiment, after the treatment of the exhaust gas is completed, the treatment device 21 can be removed from the floating body 1 and stored, so there is no need to make the gas fuel tank 6 gas-free with another floating body. If this occurs, the stored processing equipment 21 can be used. Therefore, the operating rate of the processing device 21 can be improved.
　上記第一実施形態では、更に、定期点検時などにガス燃料タンク６をガスフリーにする必要がある際にだけ、必要な不活性ガス量に応じた台数の不活性ガス供給装置２０を、浮体１に設置して、浮体１のガス燃料タンク６の内部に不活性ガスを供給することが可能となる。そのため、過剰な容量の不活性ガス供給装置２０を浮体１に常時備え付ける必要が無くなる。また、不活性ガス供給装置を備えた陸上設備や不活性ガス供給装置を備えたバンカー船を占有することもなくなる。 In the above-described first embodiment, only when the gas fuel tank 6 needs to be gas-free during periodic inspections, etc., the number of inert gas supply devices 20 corresponding to the required amount of inert gas is installed in the floating body. 1, the inert gas can be supplied to the inside of the gas fuel tank 6 of the floating body 1. Therefore, it is no longer necessary to constantly equip the floating body 1 with the inert gas supply device 20 having an excessive capacity. In addition, it is no longer necessary to occupy a land facility equipped with an inert gas supply device or a bunker ship equipped with an inert gas supply device.
　上記第一実施形態では、更に、不活性ガスの供給が完了した後には、不活性ガス供給装置２０を浮体１から撤去して保管すればよいため、別の浮体でガス燃料タンク６をガスフリーにする必要が生じた場合に、保管されている不活性ガス供給装置２０を使用することができる。したがって、不活性ガス供給装置２０の稼働率を向上することができる。 In the above-described first embodiment, after the supply of the inert gas is completed, the inert gas supply device 20 can be removed from the floating body 1 and stored. The stored inert gas supply 20 can be used when the need arises to do so. Therefore, the operating rate of the inert gas supply device 20 can be improved.
　上記第一実施形態では、更に、処理装置２１が積み重ねて浮体本体２に積載可能な海上コンテナに収容されていることで、岸壁などに設けられたコンテナ荷役用のクレーンなどを用いて処理装置２１の設置や撤去を行うことができるため、浮体１への設置作業や、撤去作業を容易に行うことが可能となる。 In the above-described first embodiment, the processing device 21 is further accommodated in a marine container that can be stacked and loaded on the floating body main body 2, so that the processing device 21 can be loaded using a crane for handling containers provided on a quay or the like. can be installed and removed, it becomes possible to easily perform the installation work to the floating body 1 and the removal work.
（第一実施形態の変形例）
　なお、第一実施形態では、不活性ガス供給装置２０を着脱可能に設置する場合について説明したが、浮体１が常設の不活性ガス供給装置を有している場合には、不活性ガス供給装置２０に代えて、この常設された不活性ガス供給装置（図示せず）を用いてもよい（以下、第二実施形態も同様）。 (Modification of first embodiment)
In the first embodiment, the case where the inert gas supply device 20 is detachably installed has been described. This permanently installed inert gas supply device (not shown) may be used instead of 20 (hereinafter, the same applies to the second embodiment).
〈第二実施形態〉
　次に、本開示の第二実施形態における浮体のガス処理方法及び浮体を図面に基づき説明する。この第二実施形態における浮体のガス処理方法は、上述した第一実施形態と、処理装置２１の設置場所のみが異なる。そのため、第二実施形態の説明では、上述した第一実施形態と同一部分に同一符号を付して説明するとともに、重複する説明を省略する。
　この第二実施形態の浮体１０１は、浮体本体２と、カーゴタンク３と、エンジン４と、上部構造５と、ガス燃料タンク（ガスタンク）６と、を備えている。 <Second embodiment>
Next, a floating body gas processing method and a floating body in a second embodiment of the present disclosure will be described based on the drawings. The floating body gas processing method in the second embodiment differs from the above-described first embodiment only in the installation location of the processing device 21 . Therefore, in the description of the second embodiment, the same reference numerals are assigned to the same parts as in the first embodiment described above, and redundant description is omitted.
A floating body 101 of the second embodiment includes a floating body body 2 , a cargo tank 3 , an engine 4 , an upper structure 5 , and a gas fuel tank (gas tank) 6 .
　図５は、本開示の第二実施形態における図２に相当する図である。
　図５に示すように、第二実施形態の浮体１０１は、複数のガス燃料タンク６と、これらガス燃料タンク６からの排出ガスを導く排出ガス配管２５と、複数のガス燃料タンク６に不活性ガスを導く不活性ガス供給管２６と、を有している。 FIG. 5 is a diagram corresponding to FIG. 2 in the second embodiment of the present disclosure.
As shown in FIG. 5 , the floating body 101 of the second embodiment includes a plurality of gas fuel tanks 6 , an exhaust gas pipe 25 for guiding the exhaust gas from these gas fuel tanks 6 , and inert gas to the plurality of gas fuel tanks 6 . and an inert gas supply pipe 26 for guiding gas.
　排出ガス配管２５は、排出ガス枝管２７と、排出ガス主配管２８とを備えている。排出ガス枝管２７は、複数のガス燃料タンク６からそれぞれ延びている。これら排出ガス枝管２７は、排出ガス主配管２８に合流接続されている。排出ガス主配管２８は、浮体１０１に設けられた第一外部配管接続部４０に接続されている。第一外部配管接続部４０は、浮体本体２の外部の配管を接続するためのものであり、例えば、浮体本体２のバンカーステーション等に設置されている。 The exhaust gas pipe 25 includes an exhaust gas branch pipe 27 and an exhaust gas main pipe 28 . Exhaust gas branch pipes 27 extend from the plurality of gas fuel tanks 6 respectively. These exhaust gas branch pipes 27 are joined and connected to the exhaust gas main pipe 28 . The exhaust gas main pipe 28 is connected to a first external pipe connection portion 40 provided on the floating body 101 . The first external pipe connection part 40 is for connecting a pipe outside the floating body 2 , and is installed, for example, at a bunker station of the floating body 2 .
　不活性ガス供給管２６は、供給主配管３６と供給枝管３７とを備えている。供給主配管３６の入口端３６ｓは、第二外部配管接続部４１に接続されている。供給枝管３７は、供給主配管３６に分岐接続され、供給主配管３６とガス燃料タンク６とを連通している。第二外部配管接続部４１も、例えば、浮体本体２のバンカーステーション等に設置されている。 The inert gas supply pipe 26 has a main supply pipe 36 and a branch pipe 37 . An inlet end 36 s of the main supply pipe 36 is connected to a second external pipe connection portion 41 . The supply branch pipe 37 is branched and connected to the main supply pipe 36 to communicate the main supply pipe 36 and the gas fuel tank 6 . The second external pipe connection part 41 is also installed, for example, at a bunker station of the floating body 2 or the like.
　この第二実施形態の処理装置２１は、浮体本体２の外部に着脱可能に設置されている。さらに、この第二実施形態の不活性ガス供給装置２０も、処理装置２１と同様に、浮体１０１の浮体本体２外部に着脱可能に設置されている。この第二実施形態の処理装置２１と不活性ガス供給装置２０とは、浮体１０１とは異なる他の浮体２００に着脱可能に設置されている。他の浮体２００としては、バージ（艀）、貨物船、処理船などを例示できる。 The processing device 21 of this second embodiment is detachably installed outside the floating body 2 . Further, the inert gas supply device 20 of the second embodiment is also detachably installed on the outside of the floating body main body 2 of the floating body 101, like the treatment device 21. As shown in FIG. The processing device 21 and the inert gas supply device 20 of this second embodiment are detachably installed on another floating body 200 different from the floating body 101 . Other floating bodies 200 can be exemplified by barges, cargo ships, processing ships, and the like.
　他の浮体２００に設置された処理装置２１は、それぞれ排出ガスを導入するための導入ライン３１を備えている。導入ライン３１の入口端３１ｓは、他の浮体２００に設置された分配接続部３０に着脱可能に接続されている。分配接続部３０は、上述した浮体１０１の第一外部配管接続部４０と、ホースなどの第一接続配管４２を介して着脱可能に接続されている。このような分配接続部３０と第一接続配管４２と第一外部配管接続部４０とによって、他の浮体２００の導入ライン３１は、浮体１０１の排出ガス配管２５に接続可能とされており、その結果、他の浮体２００の処理装置２１は、浮体１０１のガス燃料タンク６に接続可能とされている。 The treatment devices 21 installed on other floating bodies 200 each have an introduction line 31 for introducing the exhaust gas. An inlet end 31 s of the introduction line 31 is detachably connected to a distribution connection portion 30 installed on another floating body 200 . The distribution connection portion 30 is detachably connected to the above-described first external pipe connection portion 40 of the floating body 101 via a first connection pipe 42 such as a hose. The introduction line 31 of the other floating body 200 can be connected to the exhaust gas piping 25 of the floating body 101 by the distribution connection portion 30, the first connection pipe 42, and the first external pipe connection portion 40. As a result, the processing device 21 of another floating body 200 can be connected to the gas fuel tank 6 of the floating body 101 .
　他の浮体２００には、ガス燃料タンク６で排出される排出ガスの量に応じた一台以上の処理装置２１が設置されている。第二実施形態の他の浮体２００では、第一実施形態の浮体１と同様に、複数台（具体的には、３台）の処理装置２１が設置されるとともに、これら複数台の処理装置２１がガス燃料タンク６に対して並列に接続されている場合を例示している。これら複数台の処理装置２１の処理能力（体積流量）は、上述した第一実施形態と同様であり、一つの浮体１で排出される排出ガスを処理可能な処理能力となっている。 Another floating body 200 is equipped with one or more treatment devices 21 corresponding to the amount of exhaust gas discharged from the gas fuel tank 6 . In the other floating body 200 of the second embodiment, as in the floating body 1 of the first embodiment, a plurality of (specifically, three) processing devices 21 are installed, and these plurality of processing devices 21 are connected in parallel to the gas fuel tank 6 . The processing capacity (volumetric flow rate) of these plurality of processing devices 21 is the same as that of the above-described first embodiment, and is a processing capacity capable of processing exhaust gas discharged from one floating body 1 .
　他の浮体２００に設置された不活性ガス供給装置２０は、それぞれ不活性ガスを供給するための供給ライン３８を備えている。供給ライン３８の出口端３８ｏは、他の浮体２００に設置された合流接続部３２に着脱可能に接続されている。合流接続部３２は、第二外部配管接続部４１と、ホースなどの第二接続配管４３を介して接続可能となっている。このような合流接続部３２と第二接続配管４３と第二外部配管接続部４１とによって、他の浮体２００の供給ライン３８は、浮体１０１の不活性ガス供給管２６に接続可能とされており、その結果、他の浮体２００に設置された不活性ガス供給装置２０は、浮体１０１のガス燃料タンク６に接続可能とされている。 The inert gas supply devices 20 installed on other floating bodies 200 each have a supply line 38 for supplying inert gas. An outlet end 38 o of the supply line 38 is detachably connected to a confluence connection portion 32 installed on another floating body 200 . The confluence connection portion 32 can be connected to a second external pipe connection portion 41 via a second connection pipe 43 such as a hose. The supply line 38 of the other floating body 200 can be connected to the inert gas supply pipe 26 of the floating body 101 by the confluence connection portion 32, the second connection pipe 43, and the second external pipe connection portion 41. As a result, the inert gas supply device 20 installed in another floating body 200 can be connected to the gas fuel tank 6 of the floating body 101 .
（浮体のガス処理方法）
　次に、第二実施形態における浮体１０１のガス処理方法について図面を参照しながら説明する。第二実施形態の浮体１０１のガス処理方法は、第一実施形態における浮体１のガス処理方法に対し、処理装置２１及び不活性ガス供給装置２０を他の浮体２００に設置する点でのみ相違する。したがって、第一実施形態と同一の工程については、同一符号を付して説明すると共に、重複説明を省略する。なお、第一実施形態と同様に、以下の処理装置２１による排出ガス処理作業と、不活性ガス供給装置２０による不活性ガス供給作業とは並行して行っている。 (Gas processing method for floating body)
Next, a gas processing method for the floating body 101 according to the second embodiment will be described with reference to the drawings. The gas processing method for the floating body 101 of the second embodiment differs from the gas processing method for the floating body 1 in the first embodiment only in that the processing device 21 and the inert gas supply device 20 are installed in another floating body 200. . Therefore, the steps that are the same as those in the first embodiment will be described with the same reference numerals, and redundant description will be omitted. As in the first embodiment, the following exhaust gas processing operation by the processing device 21 and the inert gas supply operation by the inert gas supply device 20 are performed in parallel.
（排出ガス処理作業）
　図６は、本開示の第二実施形態における浮体の排出ガス処理作業のフローチャートである。
　図６に示すように、第二実施形態における浮体のガス処理方法における排出ガス処理作業は、少なくとも処理装置準備工程（ステップＳ１１）と、処理装置選択工程（ステップＳ１２）と、処理装置設置工程（ステップＳ１１３）と、処理工程（ステップＳ１４）と、を含んでいる。本実施形態における浮体のガス処理方法は、更に、処理装置撤去工程（ステップＳ１１５）と、処理装置保管工程（ステップＳ１６）と、を含んでいる。 (Exhaust gas treatment work)
FIG. 6 is a flow chart of the exhaust gas processing operation of the floating body in the second embodiment of the present disclosure.
As shown in FIG. 6, the exhaust gas treatment work in the floating body gas treatment method in the second embodiment includes at least a treatment equipment preparation step (step S11), a treatment equipment selection step (step S12), and a treatment equipment installation step ( step S113) and a processing step (step S14). The floating body gas processing method of the present embodiment further includes a processing device removal step (step S115) and a processing device storage step (step S16).
　まず、第一実施形態と同様に、処理装置準備工程（ステップＳ１１）と処理装置選択工程（ステップＳ１２）とを実施する。つまり、排出ガスを除害可能な複数台の処理装置２１を準備して、準備した複数台の処理装置２１の中から、一つの浮体１０１で排出される排出ガスの量に応じた少なくとも一台以上の処理装置２１を選択する。 First, as in the first embodiment, a processing device preparation step (step S11) and a processing device selection step (step S12) are performed. In other words, a plurality of processing apparatuses 21 capable of abatement of exhaust gas are prepared, and at least one of the prepared plurality of processing apparatuses 21 is selected according to the amount of exhaust gas discharged from one floating body 101. The above processing device 21 is selected.
　処理装置設置工程（ステップＳ１１３）では、処理装置選択工程（ステップＳ１２）で選択した台数分の処理装置２１を浮体１０１とは異なる他の浮体２００に設置する。第二実施形態では、例えば、処理装置２１を他の浮体２００のカーゴスペース（図示せず）などに設置する。他の浮体２００がコンテナ運搬船等であれば、他のコンテナにスタッキングするなどして設置してもよい。また、第一実施形態と同様に、複数台の処理装置２１を設置する場合、処理装置２１同士を積み重ねて（スタッキングして）設置してもよい。 In the processing device installation step (step S113), the number of processing devices 21 selected in the processing device selection step (step S12) is installed on a floating body 200 different from the floating body 101. In the second embodiment, for example, the processing device 21 is installed in a cargo space (not shown) of another floating body 200 or the like. If another floating body 200 is a container carrier or the like, it may be installed by stacking it on another container. Moreover, similarly to the first embodiment, when a plurality of processing apparatuses 21 are installed, the processing apparatuses 21 may be stacked (stacked) and installed.
　処理装置設置工程（ステップＳ１１３）では、更に、他の浮体２００に設置された処理装置２１を、浮体１０１のガス燃料タンク６に接続する。具体的には、例えば、他の浮体２００を浮体１０１の近くに曳航又は自力航走により移動させて、導入ライン３１を分配接続部３０に接続し、分配接続部３０と第一外部配管接続部４０とを第一接続配管４２により接続する。他の浮体２００に複数の処理装置２１を設置する場合には、複数の導入ライン３１を分配接続部３０に接続する。これにより、ガス燃料タンク６に対して、複数の処理装置２１が並列に接続された状態となる。 In the processing device installation step (step S113), the processing device 21 installed in another floating body 200 is further connected to the gas fuel tank 6 of the floating body 101. Specifically, for example, another floating body 200 is moved to the vicinity of the floating body 101 by towing or self-propelled, and the introduction line 31 is connected to the distribution connection portion 30, and the distribution connection portion 30 and the first external pipe connection portion are connected. 40 are connected by a first connection pipe 42 . When installing a plurality of processing devices 21 in another floating body 200 , a plurality of introduction lines 31 are connected to the distribution connection section 30 . As a result, a plurality of processing devices 21 are connected in parallel to the gas fuel tank 6 .
　処理工程（ステップＳ１４）では、処理装置設置工程（ステップＳ１１３）で設置した処理装置２１を用いて、第一実施形態と同様に浮体１０１の排出ガスを処理する。すなわち、ウォームアップ、タンク内点検準備によってガス燃料タンク６から排出された排出ガスを、他の浮体２００に設置された処理装置２１へ導いて、処理装置２１により燃焼除害などの除害処理を行った後、大気放出する。 In the treatment step (step S14), the treatment device 21 installed in the treatment device installation step (step S113) is used to treat the exhaust gas from the floating body 101 in the same manner as in the first embodiment. That is, the exhaust gas discharged from the gas fuel tank 6 during warm-up and preparation for inspection inside the tank is guided to the treatment device 21 installed on the other floating body 200, and the treatment device 21 performs a detoxification treatment such as combustion abatement. After doing so, release it into the atmosphere.
　処理装置撤去工程（ステップＳ１１５）では、上記の処理工程（ステップＳ１４）が完了した後に、処理装置２１を他の浮体２００から撤去する。具体的には、分配接続部３０と第一外部配管接続部４０とから第一接続配管４２を取り外すと共に、他の浮体２００から処理装置２１を撤去する。処理装置２１を他の浮体２００から撤去する作業は、例えば、他の浮体２００を浮体１０１の近くから曳航又は自力航走により移動させて着岸させて行ってもよいが、例えば、他の浮体２００から撤去した処理装置２１を他の小型船舶などに乗せ換えて運搬するようにしてもよい。 In the processing device removal step (step S115), the processing device 21 is removed from the other floating body 200 after the above processing step (step S14) is completed. Specifically, the first connection pipe 42 is removed from the distribution connection portion 30 and the first external pipe connection portion 40 , and the processing device 21 is removed from the other floating body 200 . The work of removing the processing device 21 from the other floating body 200 may be performed, for example, by moving the other floating body 200 from the vicinity of the floating body 101 by towing or propelling it to the shore. The processing device 21 removed from the vessel may be transferred to another small vessel or the like for transportation.
　その後、処理装置保管工程（ステップＳ１６）では、第一実施形態と同様に、上記の処理装置撤去工程（ステップＳ１１５）で撤去した処理装置２１を保管する。すなわち、他の浮体２００から撤去された処理装置２１を運搬して、上述した所定の保管場所に、他の多数の処理装置２１と共に保管する。 After that, in the processing device storage step (step S16), the processing device 21 removed in the processing device removal step (step S115) is stored, as in the first embodiment. That is, the processing equipment 21 that has been removed from another floating body 200 is transported and stored together with a large number of other processing equipment 21 at the predetermined storage location described above.
（不活性ガス供給作業）
　図７は、本開示の第二実施形態における不活性ガス供給作業のフローチャートである。
　図７に示すように、第二実施形態の浮体のガス処理方法では、上記の排出ガス処理作業に加えて、不活性ガス供給作業を行う。不活性ガス供給作業は、不活性ガス供給装置準備工程（ステップＳ２１）と、不活性ガス供給装置選択工程（ステップＳ２２）と、不活性ガス供給装置設置工程（ステップＳ１２３）と、供給工程（ステップＳ２４）と、を含んでいる。さらに、本実施形態の不活性ガス供給作業は、不活性ガス供給装置撤去工程（ステップＳ１２５）と、不活性ガス供給装置保管工程（ステップＳ２６）と、を含んでいる。 (inert gas supply work)
FIG. 7 is a flow chart of inert gas supply operation in the second embodiment of the present disclosure.
As shown in FIG. 7, in the floating body gas treatment method of the second embodiment, an inert gas supply operation is performed in addition to the exhaust gas treatment operation described above. The inert gas supply operation includes an inert gas supply device preparation step (step S21), an inert gas supply device selection step (step S22), an inert gas supply device installation step (step S123), and a supply step (step S24) and. Furthermore, the inert gas supply operation of the present embodiment includes an inert gas supply device removal step (step S125) and an inert gas supply device storage step (step S26).
　まず、第一実施形態と同様に、不活性ガス供給装置準備工程（ステップＳ２１）と、不活性ガス供給装置選択工程（ステップＳ２２）とを実施する。すなわち、ガス燃料タンク６の内部に不活性ガスを供給可能な複数台の不活性ガス供給装置２０を準備し、準備した複数台の不活性ガス供給装置２０の中から、一つの浮体１０１で必要になる不活性ガスの量に応じた少なくとも一台以上の不活性ガス供給装置２０を選択する。 First, as in the first embodiment, an inert gas supply device preparation step (step S21) and an inert gas supply device selection step (step S22) are performed. That is, a plurality of inert gas supply devices 20 capable of supplying inert gas to the inside of the gas fuel tank 6 are prepared, and from among the prepared plurality of inert gas supply devices 20, one floating body 101 needs At least one or more inert gas supply devices 20 are selected according to the amount of inert gas to be used.
　不活性ガス供給装置設置工程（ステップＳ１２３）では、上記の不活性ガス供給装置選択工程（ステップＳ２２）で選択した台数分の不活性ガス供給装置２０を他の浮体２００に設置する。この第二実施形態では、不活性ガス供給装置２０を、他の浮体２００のカーゴスペースなどに設置する。他の浮体２００がコンテナ運搬船等であれば、他のコンテナにスタッキングするなどして設置してもよい。また、第一実施形態と同様に、処理装置２１に積み重ねて（スタッキングして）もよく、さらに複数台の不活性ガス供給装置２０を設置する場合には、不活性ガス供給装置２０同士を積み重ねて設置してもよい。 In the inert gas supply device installation step (step S123), the number of inert gas supply devices 20 selected in the inert gas supply device selection step (step S22) is installed on other floating bodies 200. In this second embodiment, the inert gas supply device 20 is installed in the cargo space of another floating body 200 or the like. If another floating body 200 is a container carrier or the like, it may be installed by stacking it on another container. Further, as in the first embodiment, the processing apparatus 21 may be stacked (stacked), and when a plurality of inert gas supply apparatuses 20 are installed, the inert gas supply apparatuses 20 are stacked. can be installed.
　不活性ガス供給装置設置工程（ステップＳ１２３）では、更に、他の浮体２００に設置された不活性ガス供給装置２０を、浮体１０１のガス燃料タンク６に接続する。具体的には、例えば、他の浮体２００を浮体１０１の近くに曳航又は自力航走により移動させて、供給ライン３８を合流接続部３２に接続し、合流接続部３２と第二外部配管接続部４１とを第二接続配管４３により接続する。他の浮体２００に複数の不活性ガス供給装置２０を設置する場合には、複数の供給ライン３８を合流接続部３２に接続する。これにより、ガス燃料タンク６に対して、複数の不活性ガス供給装置２０が並列に接続された状態となる。 In the inert gas supply device installation step (step S123), the inert gas supply device 20 installed in another floating body 200 is further connected to the gas fuel tank 6 of the floating body 101. Specifically, for example, another floating body 200 is moved to the vicinity of the floating body 101 by towing or self-propelled, and the supply line 38 is connected to the confluence connection portion 32, and the confluence connection portion 32 and the second external pipe connection portion are connected. 41 are connected by a second connection pipe 43 . When installing a plurality of inert gas supply devices 20 in another floating body 200 , a plurality of supply lines 38 are connected to the confluence connection portion 32 . As a result, a plurality of inert gas supply devices 20 are connected in parallel to the gas fuel tank 6 .
　供給工程（ステップＳ２４）では、上記の供給工程（ステップＳ２４）で他の浮体２００に設置した不活性ガス供給装置２０を用いて、第一実施形態と同様に浮体１０１のガス燃料タンク６へ不活性ガスを供給する。すなわち、ガス燃料タンク６内の気体を不活性ガス供給装置２０から供給される不活性ガスに置き換える。 In the supply step (step S24), the inert gas supply device 20 installed in the other floating body 200 in the supply step (step S24) is used to supply inert gas to the gas fuel tank 6 of the floating body 101 in the same manner as in the first embodiment. Supply active gas. That is, the gas in the gas fuel tank 6 is replaced with the inert gas supplied from the inert gas supply device 20 .
　不活性ガス供給装置撤去工程（ステップＳ１２５）では、上記の供給工程（ステップＳ２４）が完了した後に、不活性ガス供給装置２０を他の浮体２００から撤去する。ここで、供給工程（ステップＳ２４）は、例えば、定期点検等で浮体１０１がドックを出て、ガス燃料タンク６内の空気を不活性ガスに置き換えた時点で完了する。 In the inert gas supply device removal step (step S125), the inert gas supply device 20 is removed from the other floating body 200 after the above supply step (step S24) is completed. Here, the supply step (step S24) is completed when, for example, the floating body 101 leaves the dock for periodic inspection or the like and the air in the gas fuel tank 6 is replaced with inert gas.
　その後、不活性ガス供給装置保管工程（ステップＳ２６）では、第一実施形態と同様に、上記の不活性ガス供給装置撤去工程（ステップＳ１２５）で撤去した不活性ガス供給装置２０を保管する。すなわち、浮体から撤去された不活性ガス供給装置２０を運搬して、上述した所定の保管場所に、他の多数の不活性ガス供給装置２０と共に保管する。なお、他の浮体２００から保管場所までの運搬は、不活性ガス供給装置２０と処理装置２１とを混載して運搬してもよい。 After that, in the inert gas supply device storage step (step S26), the inert gas supply device 20 removed in the inert gas supply device removal step (step S125) is stored as in the first embodiment. That is, the inert gas supply device 20 that has been removed from the floating body is transported and stored together with a large number of other inert gas supply devices 20 at the predetermined storage location described above. For transportation from another floating body 200 to a storage place, the inert gas supply device 20 and the processing device 21 may be mixed together.
（作用効果）
　上記第二実施形態によれば、上述した第一実施形態の作用効果に加えて、浮体１０１が着岸していない状態でも、ガス燃料タンク６をガスフリーにすることが可能となる。 (Effect)
According to the second embodiment, in addition to the effects of the first embodiment described above, it is possible to make the gas fuel tank 6 gas-free even when the floating body 101 is not docked.
　上記第二実施形態では、更に、排出ガスの処理が完了した後には、処理装置２１を他の浮体２００から撤去して保管すればよいため、別の浮体でガス燃料タンク６をガスフリーにする必要が生じた場合に、保管されている処理装置２１を使用することができる。また、処理装置２１を撤去した他の浮体２００は、処理装置２１以外を運搬するなど他の用途にも使用できる。したがって、処理装置２１及び他の浮体２００の稼働率を向上することができる。 In the above second embodiment, after the exhaust gas treatment is completed, the treatment device 21 can be removed from the other floating body 200 and stored, so the gas fuel tank 6 is made gas-free with another floating body. The stored processing equipment 21 can be used when the need arises. Moreover, another floating body 200 from which the processing equipment 21 has been removed can be used for other purposes such as transporting equipment other than the processing equipment 21 . Therefore, the operation rate of the processing device 21 and other floating body 200 can be improved.
　上記第二実施形態では、更に、浮体１０１が着岸していない状態でも、ガス燃料タンク６に不活性ガスを供給することが可能となる。 In the second embodiment, it is possible to supply inert gas to the gas fuel tank 6 even when the floating body 101 is not docked.
　上記第二実施形態では、更に、不活性ガスの供給が完了した後には、不活性ガス供給装置２０を他の浮体２００から撤去して保管すればよいため、別の浮体でガス燃料タンク６に不活性ガスを供給する必要が生じた場合に、保管されている不活性ガス供給装置２０を使用することができる。また、不活性ガス供給装置２０を撤去した他の浮体２００は、不活性ガス供給装置２０以外を運搬するなど他の用途にも使用できる。したがって、不活性ガス供給装置２０及び他の浮体２００の稼働率を向上することができる。 In the above second embodiment, after the supply of the inert gas is completed, the inert gas supply device 20 can be removed from the other floating body 200 and stored. The stored inert gas supply device 20 can be used when it becomes necessary to supply inert gas. In addition, another floating body 200 from which the inert gas supply device 20 has been removed can be used for other purposes such as transporting items other than the inert gas supply device 20 . Therefore, the operating rate of the inert gas supply device 20 and other floating body 200 can be improved.
〈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。
　例えば、上記の実施形態では、浮体１，１０１が主機等により航行可能な船舶である場合について説明したが、浮体であれば船舶に限られない。 <Other embodiments>
As described above, the embodiments of the present disclosure have been described in detail with reference to the drawings, but the specific configuration is not limited to these embodiments, and design changes etc. within the scope of the present disclosure are also included. .
For example, in the above embodiments, the case where the floating body 1, 101 is a ship that can be navigated by the main engine or the like has been described, but the floating body is not limited to a ship.
　第二実施形態では、単一の他の浮体２００に複数の処理装置２１を設置する場合について説明したが、他の浮体２００を複数用意して、これら複数の他の浮体２００のそれぞれに処理装置２１を設置したり、複数の他の浮体２００のそれぞれに不活性ガス供給装置２０を設置したりしてもよい。 In the second embodiment, a case where a plurality of processing apparatuses 21 are installed in a single other floating body 200 has been described. 21 may be installed, or the inert gas supply device 20 may be installed in each of a plurality of other floating bodies 200 .
　また、第一実施形態では、処理装置２１を浮体１に設置し、第二実施形態では、処理装置２１を他の浮体２００に設置した場合について説明した。しかし、上記構成に限られず、例えば、第一実施形態の構成と第二実施形態の構成とを組み合わせてもよい。すなわち、複数の処理装置２１を設ける場合に、浮体１と他の浮体２００とにそれぞれ処理装置２１を設けて、これら処理装置２１をガス燃料タンク６に並列に接続するようにしてもよい。 Also, in the first embodiment, the processing device 21 is installed in the floating body 1, and in the second embodiment, the processing device 21 is installed in another floating body 200. However, the configuration is not limited to the above configuration, and for example, the configuration of the first embodiment and the configuration of the second embodiment may be combined. That is, when a plurality of processing devices 21 are provided, the processing device 21 may be provided for each of the floating body 1 and the other floating body 200 and these processing devices 21 may be connected to the gas fuel tank 6 in parallel.
　さらに、第一、第二実施形態では、処理装置２１及び不活性ガス供給装置２０を積み重ね可能なコンテナに収容する場合について説明した。しかし、処理装置２１及び不活性ガス供給装置２０は、コンテナに収容される態様や、積み重ね可能な態様に限られない。 Furthermore, in the first and second embodiments, the case where the processing device 21 and the inert gas supply device 20 are housed in stackable containers has been described. However, the processing device 21 and the inert gas supply device 20 are not limited to being housed in a container or being stackable.
　また、第一、第二実施形態では、ガスタンクが燃料ガスを貯留するガス燃料タンク６である場合を一例にして説明したが、ガスタンクは、ガス燃料タンク６に限られない。例えば、カーゴタンク３であったり、他のタンクであったりしてもよい。 Also, in the first and second embodiments, the case where the gas tank is the gas fuel tank 6 that stores the fuel gas has been described as an example, but the gas tank is not limited to the gas fuel tank 6 . For example, it may be the cargo tank 3 or another tank.
　さらに、第一、第二実施形態では、ガス燃料タンク６をガスフリーにする際に、不活性ガス供給装置２０から不活性ガスを供給する場合について説明したが、ガス燃料タンク６に貯留されていた貯留物が酸素と接触しても差し支えない場合には、不活性ガスに代えて外気を取り込むようにしてもよい。 Furthermore, in the first and second embodiments, the case where the inert gas is supplied from the inert gas supply device 20 when making the gas fuel tank 6 gas-free has been described. If there is no problem with the stored material coming into contact with oxygen, outside air may be taken in instead of the inert gas.
　また、第一、第二実施形態では、処理装置２１と不活性ガス供給装置２０とを別のコンテナに収容する場合について説明したが、処理装置２１と不活性ガス供給装置２０とを同じコンテナに収容するようにしてもよい。 Further, in the first and second embodiments, the case where the processing device 21 and the inert gas supply device 20 are housed in separate containers has been described, but the processing device 21 and the inert gas supply device 20 are housed in the same container. It may be accommodated.
　さらに、不活性ガス供給装置２０は、海上コンテナに収容される形態に限られない。不活性ガス供給装置２０は、例えば、液体窒素を貯留可能なＩＳＯ規格のタンクコンテナと、液体窒素を気化するベーパライザーと、を組み合わせた構成であってもよい。
　また、処理装置２１は、燃焼除害装置、燃焼除害装置の燃料を貯留する燃料タンクなど、排出ガスを燃焼除害するための装置一式を海上コンテナ内に収容する場合について例示した。しかし、処理装置２１は、燃焼方式に限られない。例えば、液化ガスを貯留可能なＩＳＯ規格のタンクコンテナであったり、液化ガスを吸収可能な液体を貯留可能なＩＳＯ規格のタンクコンテナであったりしてもよい。また、処理装置２１は、上記液化ガスを貯留可能なＩＳＯ規格のタンクコンテナと、液化ガスを吸収可能な液体を貯留可能なＩＳＯ規格のタンクコンテナとを組み合わせた構成であってもよい。 Furthermore, the inert gas supply device 20 is not limited to being housed in a marine container. The inert gas supply device 20 may have, for example, a configuration in which an ISO standard tank container capable of storing liquid nitrogen and a vaporizer that vaporizes the liquid nitrogen are combined.
Moreover, the processing device 21 illustrated the case where a complete set of devices for combustion abatement of exhaust gas, such as a combustion abatement device and a fuel tank for storing fuel for the combustion abatement device, is housed in a marine container. However, the processing device 21 is not limited to the combustion type. For example, it may be an ISO standard tank container capable of storing liquefied gas or an ISO standard tank container capable of storing liquid capable of absorbing liquefied gas. The processing apparatus 21 may have a configuration in which an ISO standard tank container capable of storing the liquefied gas and an ISO standard tank container capable of storing a liquid capable of absorbing the liquefied gas are combined.
　また、第一、第二実施形態では、処理装置２１で用いる配管系統と、不活性ガス供給装置２０で用いる配管系統とを、個別に設ける場合について説明した。しかし、不活性ガス供給装置２０による不活性ガスの供給と、ガスタンクからの排出ガスの排出と、を同時に行わない場合には、一つの配管系統を設けて、この配管系統を処理装置２１と不活性ガス供給装置２０とによって共用するようにしてもよい。 Also, in the first and second embodiments, the case where the piping system used in the processing device 21 and the piping system used in the inert gas supply device 20 are separately provided has been described. However, if the supply of the inert gas by the inert gas supply device 20 and the discharge of the exhaust gas from the gas tank are not performed at the same time, one piping system is provided, and this piping system is connected to the treatment device 21 and inactive. It may be shared with the active gas supply device 20 .
　さらに、処理装置２１及び不活性ガス供給装置２０が、曝露部である上甲板９の上に設置される場合について説明した。しかし、これら処理装置２１及び不活性ガス供給装置２０が設置される場所は、半曝露部や室内であってもよい。 Furthermore, the case where the treatment device 21 and the inert gas supply device 20 are installed on the upper deck 9, which is the exposed portion, has been explained. However, the place where the processing device 21 and the inert gas supply device 20 are installed may be a semi-exposed area or a room.
　図８は、本開示の第一実施形態の変形例における図２相当する図である。図９は、本開示の第二実施形態の変形例における図５に相当する図である。
　図８、図９に示すように、処理装置２１の排熱を利用するなどして、ガス燃料タンク６内の温度を上昇させる昇温系統５０を設けるようにしてもよい。ここでは、不活性ガス供給装置２０によりガス燃料タンク６へ供給する気体を、昇温系統５０によって加熱することが可能となっている。このようにすることで、ガス燃料タンク６内の残液を処理したり、ガス燃料タンク６内の壁面温度を上昇させたりするなどの工程を行うことが可能となる。 FIG. 8 is a diagram corresponding to FIG. 2 in the modification of the first embodiment of the present disclosure. FIG. 9 is a diagram corresponding to FIG. 5 in a modification of the second embodiment of the present disclosure.
As shown in FIGS. 8 and 9, a temperature raising system 50 may be provided to raise the temperature in the gas fuel tank 6 by using exhaust heat from the processing device 21 or the like. Here, the gas supplied to the gas fuel tank 6 by the inert gas supply device 20 can be heated by the heating system 50 . By doing so, it becomes possible to perform processes such as treating the residual liquid in the gas fuel tank 6 and raising the wall surface temperature in the gas fuel tank 6 .
＜付記＞
　実施形態に記載の浮体のガス処理方法及び浮体は、例えば以下のように把握される。 <Appendix>
The floating body gas processing method and the floating body described in the embodiments are grasped, for example, as follows.
（１）第１の態様によれば浮体のガス処理方法は、浮体１，１０１に設けられたガスタンク６の内部を不活性ガスに置き換える際に排出される排出ガスを除害する浮体１，１０１のガス処理方法であって、前記排出ガスを除害可能な複数台の処理装置２１を準備する処理装置準備工程（ステップＳ１１）と、前記処理装置準備工程（ステップＳ１１）で準備した複数台の前記処理装置２１の中から、一つの浮体１，１０１で排出される前記排出ガスの量に応じた少なくとも一台以上の前記処理装置２１を選択する処理装置選択工程（ステップＳ１２）と、前記処理装置選択工程（ステップＳ１２）で選択した台数分の前記処理装置２１を前記浮体１，１０１と、前記浮体１，１０１とは異なる他の浮体２００との少なくとも一方に設置する処理装置設置工程（ステップＳ１３）と、前記処理装置設置工程で設置した前記処理装置２１を用いて前記浮体１，１０１の前記排出ガスを処理する処理工程（ステップＳ１４）と、を含む。
　浮体１，１０１の例としては、液化ガス運搬船、フェリー、ＲＯＲＯ船、自動車運搬船、客船等の船舶、ＦＳＵ（Floating Storage Unit）、ＦＳＲＵ（Floating Storage and Regasification Unit）等が挙げられる。 (1) According to the first aspect, the gas treatment method for the floating bodies 1 and 101 abates the exhaust gas discharged when the inside of the gas tank 6 provided in the floating bodies 1 and 101 is replaced with an inert gas. A gas processing method comprising: a processing device preparation step (step S11) of preparing a plurality of processing devices 21 capable of removing the exhaust gas, and a plurality of processing devices prepared in the processing device preparation step (step S11) a processing device selection step (step S12) of selecting at least one or more of the processing devices 21 from among the processing devices 21 according to the amount of the exhaust gas discharged from one floating body 1, 101; A processing device installation step (step S13) and a processing step (step S14) of processing the exhaust gas from the floating bodies 1 and 101 using the processing device 21 installed in the processing device installation step.
Examples of the floating bodies 1 and 101 include ships such as liquefied gas carriers, ferries, RORO ships, car carriers, and passenger ships, FSUs (Floating Storage Units), FSRUs (Floating Storage and Regasification Units), and the like.
　これにより、例えば、定期点検時などにガスタンク６をガスフリーにする必要がある際にだけ、ガスタンク６から排出される排出ガス量に応じた台数の処理装置２１を、浮体１，１０１又は浮体１，１０１とは異なる他の浮体２００に設置して、浮体１，１０１の排出ガスを処理することが可能となる。そのため、ガスタンク６内から排出される排出ガスを処理するための大型の処理装置を浮体１，１０１に常時備え付ける必要が無くなる。また、処理設備を備えた陸上設備や処理設備を備えたバンカー船を占有することもなくなる。また、使用するときにだけ処理装置２１を設置すればよいため、浮体１，１０１及び他の浮体２００の重量を低減して、例えば、浮体１，１０１及び他の浮体２００を移動させる際の燃料消費を低減できる。
　したがって、船上スペースの有効活用ならびにスタビリティーの改善をすることが可能となる。 As a result, for example, only when it is necessary to make the gas tank 6 gas-free during periodic inspections, etc., the number of processing devices 21 corresponding to the amount of exhaust gas discharged from the gas tank 6 can be set to the floating body 1, 101 or the floating body 1. , 101 to treat the exhaust gas of the floating bodies 1, 101. Therefore, it is not necessary to always equip the floating bodies 1 and 101 with a large-sized processing device for processing the exhaust gas discharged from the gas tank 6 . In addition, it is no longer necessary to occupy land-based facilities with treatment facilities or bunker ships with treatment facilities. In addition, since it is only necessary to install the processing device 21 only when it is used, the weight of the floating bodies 1, 101 and other floating bodies 200 can be reduced, for example, fuel for moving the floating bodies 1, 101 and other floating bodies 200 Consumption can be reduced.
Therefore, it is possible to make effective use of space on board and improve stability.
（２）第２の態様によれば浮体のガス処理方法は、（１）の浮体のガス処理方法であって、前記処理装置設置工程（ステップＳ１３）では、前記処理装置選択工程（ステップＳ１２）で選択した前記処理装置２１が複数台である場合に、前記複数台の前記処理装置２１を前記ガスタンク６に並列に接続する。
　これにより、ガスタンク６から排出される排出ガスを迅速に処理することができる。 (2) According to the second aspect, the gas processing method for a floating body is the gas processing method for a floating body according to (1), wherein the processing device installation step (step S13) includes the processing device selection step (step S12). If the number of the processing apparatuses 21 selected in 1. is plural, the plural processing apparatuses 21 are connected to the gas tank 6 in parallel.
As a result, the exhaust gas discharged from the gas tank 6 can be quickly processed.
（３）第３の態様によれば浮体のガス処理方法は、（１）又は（２）の浮体のガス処理方法であって、前記処理工程（ステップＳ１４）が完了した後に、前記処理装置２１を前記浮体１，１０１から撤去する処理装置撤去工程（ステップＳ１５）と、前記処理装置撤去工程（ステップＳ１５）で撤去した前記処理装置２１を保管する処理装置保管工程（ステップＳ１６）と、を含む。
　これにより、排出ガスの処理が完了した後には、処理装置２１を浮体１，１０１から撤去して保管すればよいため、別の浮体でガスタンク６をガスフリーにする必要が生じた場合に、保管されている処理装置２１を使用することができる。 (3) According to the third aspect, the gas processing method for a floating body is the gas processing method for a floating body according to (1) or (2), wherein after the processing step (step S14) is completed, the processing device 21 from the floating body 1, 101 (step S15), and a processing device storage step (step S16) of storing the processing device 21 removed in the processing device removal step (step S15). .
As a result, after the treatment of the exhaust gas is completed, the treatment device 21 can be removed from the floating body 1, 101 and stored. A processing device 21 as described can be used.
（４）第４の態様によれば浮体のガス処理方法は、（１）から（３）の何れか一つの浮体のガス処理方法であって、前記ガスタンク６の内部に不活性ガスを供給可能な複数台の不活性ガス供給装置２０を準備する不活性ガス供給装置準備工程（ステップＳ２１）と、前記不活性ガス供給装置準備工程（ステップＳ２１）で準備した複数台の前記不活性ガス供給装置２０の中から、一つの浮体１，１０１で必要になる前記不活性ガスの量に応じた少なくとも一台以上の前記不活性ガス供給装置２０を選択する不活性ガス供給装置選択工程（ステップＳ２２）と、前記不活性ガス供給装置選択工程（ステップＳ２２）で選択した台数分の前記不活性ガス供給装置２０を前記浮体１，１０１と、前記浮体１，１０１とは異なる他の浮体２００との少なくとも一方に設置する不活性ガス供給装置設置工程（ステップＳ２３）と、前記不活性ガス供給装置設置工程（ステップＳ２３）で設置した前記不活性ガス供給装置２０を用いて前記ガスタンク６に前記不活性ガスを供給する供給工程（ステップＳ２４）と、を含む。
　これにより、例えば、定期点検時などにガスタンク６をガスフリーにする必要があり不活性ガスを供給する必要が生じた際にだけ、必要な不活性ガス量に応じた台数の不活性ガス供給装置２０を、浮体１，１０１又は浮体１，１０１とは異なる他の浮体２００に設置して、浮体１，１０１のガスタンク６の内部に不活性ガスを供給することが可能となる。そのため、不活性ガス供給装置２０を浮体１，１０１に常時備え付ける必要が無くなる。また、不活性ガス供給装置２０を備えた陸上設備や不活性ガス供給装置２０を備えたバンカー船を占有することもなくなる。また、浮体１，１０１及び他の浮体２００の重量を低減できるため、例えば、浮体１，１０１及び他の浮体２００を移動させる際の燃料消費を低減できる。 (4) According to the fourth aspect, the gas processing method for a floating body is the gas processing method for a floating body according to any one of (1) to (3), wherein an inert gas can be supplied to the inside of the gas tank 6. an inert gas supply device preparation step (step S21) for preparing a plurality of inert gas supply devices 20, and the plurality of inert gas supply devices prepared in the inert gas supply device preparation step (step S21) an inert gas supply device selection step of selecting at least one or more of the inert gas supply devices 20 from among 20 according to the amount of the inert gas required for one floating body 1, 101 (step S22) and at least the number of inert gas supply devices 20 selected in the inert gas supply device selection step (step S22) among the floating bodies 1 and 101 and other floating bodies 200 different from the floating bodies 1 and 101 The inert gas is supplied to the gas tank 6 using the inert gas supply device installation step (step S23) installed on one side and the inert gas supply device 20 installed in the inert gas supply device installation step (step S23). and a supply step (step S24) of supplying the
As a result, for example, when it is necessary to make the gas tank 6 gas-free during periodic inspections, etc., and it is necessary to supply inert gas, the number of inert gas supply devices corresponding to the required amount of inert gas can be supplied. 20 can be installed on the floating body 1,101 or another floating body 200 different from the floating body 1,101 to supply inert gas to the inside of the gas tank 6 of the floating body 1,101. Therefore, it becomes unnecessary to always equip the floating bodies 1 and 101 with the inert gas supply device 20 . In addition, the land facility equipped with the inert gas supply device 20 and the bunker ship equipped with the inert gas supply device 20 are not occupied. Moreover, since the weight of the floating bodies 1 and 101 and the other floating bodies 200 can be reduced, fuel consumption when moving the floating bodies 1 and 101 and the other floating bodies 200 can be reduced, for example.
（５）第５の態様によれば浮体のガス処理方法は、（４）の浮体のガス処理方法であって、前記供給工程（ステップＳ２４）が完了した後に、前記不活性ガス供給装置２０を前記浮体１，１０１から撤去する不活性ガス供給装置撤去工程（ステップＳ２５）と、前記不活性ガス供給装置撤去工程（ステップＳ２５）で撤去した前記不活性ガス供給装置２０を保管する不活性ガス供給装置保管工程（ステップＳ２６）と、を含む。
　これにより、不活性ガスの供給が完了した後には、不活性ガス供給装置２０を浮体１，１０１から撤去して保管すればよいため、別の浮体でガスタンク６に不活性ガスを供給する必要が生じた場合に、保管されている不活性ガス供給装置２０を使用することができる。 (5) According to the fifth aspect, the method for gas treatment of a floating body is the method for gas treatment of a floating body of (4), wherein after the supply step (step S24) is completed, the inert gas supply device 20 is An inert gas supply device removal step (step S25) for removing from the floating body 1, 101, and an inert gas supply for storing the inert gas supply device 20 removed in the inert gas supply device removal step (step S25) and an apparatus storage step (step S26).
As a result, after the supply of the inert gas is completed, the inert gas supply device 20 can be removed from the floating bodies 1 and 101 and stored. If this occurs, the stored inert gas supply 20 can be used.
（６）第６の態様によれば浮体は、浮体本体２と、前記浮体本体２に設けられ、液化ガスを貯留可能なガスタンク６と、前記浮体本体２に対して着脱可能に設置され、前記ガスタンク６から排出される排出ガスを除害する複数の処理装置２１と、を備え、前記複数の処理装置２１は、前記ガスタンク６に対して並列に接続される。
　これにより、処理装置２１を使用しない場合には、浮体本体２から撤去することができる。そのため、処理装置２１を、別の浮体の浮体本体に設置して用いることもできる。さらに、複数の処理装置２１を並列に接続して用いるため、一つの大型の処理装置２１を用いる場合と同等の処理性能を確保しつつ、一つ当たりの処理装置２１大きさを低減できるため、処理装置２１の着脱作業に掛かる作業者の負担を軽減できる。 (6) According to the sixth aspect, the floating body includes a floating body main body 2, a gas tank 6 provided in the floating body main body 2 and capable of storing liquefied gas, and detachably installed on the floating body main body 2, and a plurality of treatment devices 21 for abatement of exhaust gas discharged from the gas tank 6 , and the plurality of treatment devices 21 are connected in parallel to the gas tank 6 .
Thereby, when the processing device 21 is not used, it can be removed from the floating body main body 2 . Therefore, the processing device 21 can be used by installing it in the floating body main body of another floating body. Furthermore, since a plurality of processing devices 21 are connected in parallel and used, the size of each processing device 21 can be reduced while ensuring the same processing performance as when using a single large processing device 21. It is possible to reduce the burden on the operator involved in attaching and detaching the processing device 21 .
（７）第７の態様によれば浮体は、浮体本体２と、前記浮体本体２に対して着脱可能に設置され、他の浮体２００に設けられている液化ガスを貯留可能なガスタンク６から排出される排出ガスを除害する複数の処理装置２１と、を備え、前記複数の処理装置２１は、前記ガスタンク６に対して並列に接続される。
　これにより、浮体１，１０１に設けられている複数の処理装置２１を用いて他の浮体２００に設けられているガスタンク６から排出された排出ガスを迅速に処理することが可能となる。また、複数の処理装置２１を並列に接続して用いるため、一つの大型の処理装置を用いる場合と同等の処理性能を確保しつつ、一つ当たりの処理装置２１大きさを低減できるため、処理装置２１の着脱作業に掛かる作業者の負担を軽減できる。 (7) According to the seventh aspect, the floating body is installed detachably from the floating body main body 2 and the floating body main body 2, and discharges the liquefied gas from the gas tank 6 provided in the other floating body 200 that can store the liquefied gas. and a plurality of treatment devices 21 for abatement of the emitted exhaust gas, and the plurality of treatment devices 21 are connected in parallel to the gas tank 6 .
As a result, the exhaust gas discharged from the gas tanks 6 provided in the other floating bodies 200 can be quickly treated using the plurality of treatment devices 21 provided in the floating bodies 1 and 101 . In addition, since a plurality of processing devices 21 are connected in parallel and used, the size of each processing device 21 can be reduced while ensuring the same processing performance as when using a single large processing device. The burden on the operator involved in attaching and detaching the device 21 can be reduced.
（８）第８の態様によれば浮体は、（６）又は（７）の浮体であって、前記浮体本体２に対して着脱可能に設置され、前記ガスタンク６へ不活性ガスを供給可能な不活性ガス供給装置２０を備える。
　これにより、不活性ガス供給装置２０を使用しない場合には、浮体本体２から撤去することができる。そのため、不活性ガス供給装置２０を、別の浮体の浮体本体２に設置して用いることもできる。 (8) According to the eighth aspect, the floating body is the floating body of (6) or (7), which is detachably installed on the floating body body 2 and capable of supplying inert gas to the gas tank 6. An inert gas supply device 20 is provided.
Thereby, when the inert gas supply device 20 is not used, it can be removed from the floating body main body 2 . Therefore, the inert gas supply device 20 can be used by installing it in the floating body main body 2 of another floating body.
（９）第９の態様によれば浮体は、（６）から（８）の何れか一つの浮体であって、前記処理装置２１は、前記浮体本体２に積み重ねて積載可能なコンテナに収容されている。
　これにより、岸壁などに設けられたコンテナ荷役用のクレーンなどを用いて処理装置２１の設置や撤去を行うことができるため、浮体１，１０１への設置作業や、撤去作業を容易に行うことが可能となる。 (9) According to the ninth aspect, the floating body is any one of (6) to (8), and the processing device 21 is housed in a container that can be stacked and loaded on the floating body main body 2. ing.
As a result, the processing device 21 can be installed and removed using a container handling crane or the like provided on a quay or the like. It becomes possible.
　本開示に係る浮体のガス処理方法及び浮体によれば、船上スペースの有効活用ならびにスタビリティーの改善をすることが可能となる。 According to the floating body gas processing method and the floating body according to the present disclosure, it is possible to effectively utilize the onboard space and improve the stability.
１，１０１…浮体　２…浮体本体　２Ａ…船尾　２Ｆ…船首　３…カーゴタンク　４…エンジン　５…上部構造　６…ガス燃料タンク　７…舷側　８…船底　９…上甲板　１０…カーゴホールド　１０ａ…仕切壁　１１…主機室　１２…スクリュー　１３…舵　１４…底板　１５…甲板　１６…専用スペース　２０…不活性ガス供給装置　２１…処理装置　２５…排出ガス配管　２６…不活性ガス供給管　２７…排出ガス枝管　２８…排出ガス主配管　２９…端部　３０…分配接続部　３１…導入ライン　３１ｓ…入口端　３２…合流接続部　３３…小型処理装置　３６…供給主配管　３７…供給枝管　３８…供給ライン　４０…第一外部配管接続部　４１…第二外部配管接続部　４２…第一接続配管　４３…第二接続配管　２００…他の浮体 1, 101... Floating body 2... Floating body main body 2A... Stern 2F... Bow 3... Cargo tank 4... Engine 5... Superstructure 6... Gas fuel tank 7... Broadside 8... Ship bottom 9... Upper deck 10... Cargo hold 10a... Partition wall 11 ...Main engine room 12...Screw 13...Rudder 14...Bottom plate 15...Deck 16...Exclusive space 20...Inert gas supply device 21...Processing device 25...Exhaust gas pipe 26...Inert gas supply pipe 27...Exhaust gas branch pipe 28... Exhaust gas main pipe 29...End 30...Distribution connection 31...Introduction line 31s...Inlet end 32...Merge connection 33...Small processing unit 36...Supply main pipe 37...Supply branch pipe 38...Supply line 40...First external Pipe connection part 41... Second external pipe connection part 42... First connection pipe 43... Second connection pipe 200... Other floating body

Claims (8)

  1. 　浮体に設けられたガスタンクの内部を不活性ガスに置き換える際に排出される排出ガスを除害する浮体のガス処理方法であって、
    　前記排出ガスを除害可能な複数台の処理装置を準備する処理装置準備工程と、
    　前記処理装置準備工程で準備した複数台の前記処理装置の中から、一つの浮体で排出される前記排出ガスの量に応じた少なくとも一台以上の前記処理装置を選択する処理装置選択工程と、
    　前記処理装置選択工程で選択した台数分の前記処理装置を前記浮体と、前記浮体とは異なる他の浮体との少なくとも一方に設置する処理装置設置工程と、
    　前記処理装置設置工程で設置した前記処理装置を用いて前記浮体の前記排出ガスを処理する処理工程と、
    を含む
    浮体のガス処理方法。     A gas treatment method for a floating body for abatement of exhaust gas discharged when the inside of a gas tank provided in the floating body is replaced with inert gas,
    a processing device preparation step of preparing a plurality of processing devices capable of abatement of the exhaust gas;
    A processing device selection step of selecting at least one or more of the processing devices according to the amount of the exhaust gas discharged from one floating body from among the plurality of processing devices prepared in the processing device preparation step;
    a processing device installation step of installing the number of processing devices selected in the processing device selection step on at least one of the floating body and another floating body different from the floating body;
    A processing step of processing the exhaust gas from the floating body using the processing device installed in the processing device installation step;
    A floating body gas treatment method comprising:
  2. 　前記処理装置設置工程では、
    　前記処理装置選択工程で選択した前記処理装置が複数台である場合に、前記複数台の前記処理装置を前記ガスタンクに並列に接続する
    請求項１に記載の浮体のガス処理方法。     In the processing equipment installation step,
    2. The floating body gas processing method according to claim 1, wherein when a plurality of said processing devices are selected in said processing device selection step, said plurality of said processing devices are connected in parallel to said gas tank.
  3. 　前記処理工程が完了した後に、前記処理装置を前記浮体から撤去する処理装置撤去工程と、
    　前記処理装置撤去工程で撤去した前記処理装置を保管する処理装置保管工程と、
    を含む
    　請求項１又は２に記載の浮体のガス処理方法。     a processing device removal step of removing the processing device from the floating body after the processing step is completed;
    a processing device storage step of storing the processing device removed in the processing device removal step;
    The floating body gas treatment method according to claim 1 or 2.
  4. 　前記ガスタンクの内部に不活性ガスを供給可能な複数台の不活性ガス供給装置を準備する不活性ガス供給装置準備工程と、
    　前記不活性ガス供給装置準備工程で準備した複数台の前記不活性ガス供給装置の中から、一つの浮体で必要になる前記不活性ガスの量に応じた少なくとも一台以上の前記不活性ガス供給装置を選択する不活性ガス供給装置選択工程と、
    　前記不活性ガス供給装置選択工程で選択した台数分の前記不活性ガス供給装置を前記浮体と、前記浮体とは異なる他の浮体との少なくとも一方に設置する不活性ガス供給装置設置工程と、
    　前記不活性ガス供給装置設置工程で設置した前記不活性ガス供給装置を用いて前記ガスタンクに前記不活性ガスを供給する供給工程と、
    を含む
    請求項１又は２に記載の浮体のガス処理方法。     an inert gas supply device preparation step of preparing a plurality of inert gas supply devices capable of supplying inert gas to the inside of the gas tank;
    At least one of the inert gas supply devices prepared in the inert gas supply device preparation step, according to the amount of the inert gas required for one floating body, supplies the inert gas. an inert gas supply device selection step of selecting a device;
    an inert gas supply device installation step of installing the number of the inert gas supply devices selected in the inert gas supply device selection step on at least one of the floating body and another floating body different from the floating body;
    A supply step of supplying the inert gas to the gas tank using the inert gas supply device installed in the inert gas supply device installation step;
    The floating body gas treatment method according to claim 1 or 2.
  5. 　前記供給工程が完了した後に、前記不活性ガス供給装置を前記浮体から撤去する不活性ガス供給装置撤去工程と、
    　前記不活性ガス供給装置撤去工程で撤去した前記不活性ガス供給装置を保管する不活性ガス供給装置保管工程と、
    を含む
    　請求項４に記載の浮体のガス処理方法。     an inert gas supply device removal step of removing the inert gas supply device from the floating body after the supply step is completed;
    an inert gas supply device storage step of storing the inert gas supply device removed in the inert gas supply device removal step;
    The floating body gas treatment method according to claim 4.
  6. 　浮体本体と、
    　前記浮体本体に設けられ、液化ガスを貯留可能なガスタンクと、
    　前記浮体本体に対して着脱可能に設置され、前記ガスタンクから排出される排出ガスを除害する複数の処理装置と、を備え、
    　前記複数の処理装置は、前記ガスタンクに対して並列に接続される
    浮体。     a floating body body;
    a gas tank provided in the floating body main body and capable of storing liquefied gas;
    a plurality of treatment devices that are detachably installed on the floating body body and that abate the exhaust gas discharged from the gas tank,
    The floating body, wherein the plurality of processing devices are connected in parallel to the gas tank.
  7. 　浮体本体と、
    　前記浮体本体に対して着脱可能に設置され、他の浮体に設けられている液化ガスを貯留可能なガスタンクから排出される排出ガスを除害する複数の処理装置と、
    を備え、
    　前記複数の処理装置は、前記ガスタンクに対して並列に接続される
    浮体。     a floating body body;
    a plurality of treatment devices that are detachably installed on the floating body main body and that abate exhaust gas discharged from gas tanks capable of storing liquefied gas provided on other floating bodies;
    with
    The floating body, wherein the plurality of processing devices are connected in parallel to the gas tank.
  8. 　前記処理装置は、前記浮体本体に積み重ねて積載可能なコンテナに収容されている請求項６又は７に記載の浮体。 The floating body according to claim 6 or 7, wherein the processing equipment is accommodated in a container that can be stacked and loaded on the body of the floating body.
PCT/JP2022/040718 2022-02-25 2022-10-31 Method for treating gas of floating body, and floating body WO2023162350A1 (en)

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