JP2020007187A - System and method for producing hydrogen gas - Google Patents

System and method for producing hydrogen gas Download PDF

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JP2020007187A
JP2020007187A JP2018129920A JP2018129920A JP2020007187A JP 2020007187 A JP2020007187 A JP 2020007187A JP 2018129920 A JP2018129920 A JP 2018129920A JP 2018129920 A JP2018129920 A JP 2018129920A JP 2020007187 A JP2020007187 A JP 2020007187A
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hydrogen
hydrogen gas
gas
storage chamber
water
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JP7067325B2 (en
JP2020007187A5 (en
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近藤　俊行
Toshiyuki Kondo
俊行 近藤
正之介 周布
Masanosuke Sufu
正之介 周布
音窪　健太郎
Kentaro Otokubo
健太郎 音窪
慎治 佐々
Shinji Sassa
慎治 佐々
広樹 安藤
Hiroki Ando
広樹 安藤
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Toyota Motor Corp
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Priority to CN201910593938.1A priority patent/CN110699699A/en
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/02—Hydrogen or oxygen
    • C25B1/04—Hydrogen or oxygen by electrolysis of water
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/05—Pressure cells
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/60—Constructional parts of cells
    • C25B9/65—Means for supplying current; Electrode connections; Electric inter-cell connections
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

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  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
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  • Inorganic Chemistry (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Hydrogen, Water And Hydrids (AREA)

Abstract

To provide a hydrogen gas-producing technique, suppressed in cost required for compression.SOLUTION: A system for producing hydrogen gas includes: a pair of electrodes for electrolysis of water that are disposed at a predetermined water depth under water and configured to be connected to a power supply; a gas storage chamber that is disposed at the water depth, has communication holes through which surrounding water can flow in, and stores the hydrogen gas generated at a cathode of the pair of electrodes due to the electrolysis; a hydrogen recovery device disposed above the water depth; and piping configured to lead the hydrogen gas stored in the gas storage chamber to the hydrogen recovery device.SELECTED DRAWING: Figure 1

Description

本発明は、水素ガスの生成に関する。   The present invention relates to the generation of hydrogen gas.

燃料電池の発電のために用いられる燃料として、或いは、工業用原料として、水素の需要が高まっている。水素製造プラント等で製造された水素ガスは、水素製造プラントまたは水素ガスステーションにて圧縮された後に容器に貯蔵され、ディスペンサを介して燃料電池車両等の燃料消費装置に供給されることがある。特許文献１には、ガス製造装置にて製造された水素ガスが圧縮機において圧縮されて蓄圧器に一時的に貯留され、その後、ディスペンサを介して車両に充填される構成が開示されている。   There is an increasing demand for hydrogen as a fuel used for fuel cell power generation or as an industrial raw material. Hydrogen gas produced in a hydrogen production plant or the like may be compressed in a hydrogen production plant or a hydrogen gas station, stored in a container, and supplied to a fuel consuming device such as a fuel cell vehicle via a dispenser. Patent Document 1 discloses a configuration in which hydrogen gas produced by a gas production device is compressed by a compressor, temporarily stored in a pressure accumulator, and then charged into a vehicle via a dispenser.

特開２０１７−１３１８６２号公報JP-A-2017-131862

特許文献１のように、一般に水素ガスを貯蔵する際には、多量のガスを貯蔵するために例えば７０ＭＰａ（メガパスカル）という高圧ガスになるまで水素ガスが圧縮される。このため、圧縮機が必要となり、水素ガス供給の圧縮コストが大きいという問題がある。そこで、水素ガスの圧縮に要するコストを抑えることを可能な水素ガスの生成技術が望まれている。   As in Patent Literature 1, when hydrogen gas is generally stored, the hydrogen gas is compressed to a high pressure gas of, for example, 70 MPa (megapascal) in order to store a large amount of gas. For this reason, a compressor is required, and there is a problem that the compression cost of hydrogen gas supply is large. Therefore, a hydrogen gas generation technique capable of suppressing the cost required for hydrogen gas compression is desired.

本発明は、以下の形態として実現することが可能である。   The present invention can be realized as the following modes.

（１）本発明の一形態によれば、水素ガス生成システムが提供される。この水素ガス生成システムは、水中の予め定められた水深に配置され、電源に接続された水の電気分解用の一対の電極と；前記水深に配置され、周囲の水が流入可能な連通孔を有するガス貯蔵室であって、電気分解により前記一対の電極のうちの陰極において発生する水素ガスを貯蔵するガス貯蔵室と；前記水深よりも上方に配置された水素回収装置と；前記ガス貯蔵室内の水素ガスを前記水素回収装置に導く管と；を備える。   (1) According to one aspect of the present invention, a hydrogen gas generation system is provided. This hydrogen gas generation system is provided with a pair of electrodes for water electrolysis arranged at a predetermined water depth in water and connected to a power source; and a communication hole arranged at the water depth and through which surrounding water can flow. A gas storage chamber for storing hydrogen gas generated at a cathode of the pair of electrodes by electrolysis; a hydrogen recovery device disposed above the water depth; and a gas storage chamber. And a pipe for guiding the hydrogen gas to the hydrogen recovery device.

この形態の水素ガス生成システムによれば、水中において予め定められた水深に配置された一対の電極による水の電気分解によって水素ガスを発生させるので、かかる水深の水圧に相当する圧力の水素ガスを生成できる。したがって、かかる水深よりも上方において水素ガスを生成する構成に比べて、高圧の水素ガスを圧縮機などの設備を用いずに生成でき、水素ガスの圧縮に要するコストを抑えて水素ガスを生成できる。加えて、生成された水素ガスを周囲の水が流入するガス貯蔵室に貯蔵するので、水素ガスを、かかる水深の水圧に相当する圧力の水素ガスのまま貯蔵することができる。このため、水素ガスの圧力に耐え得るほどの大掛かりな設備を要せず、水素ガスの貯蔵コストを抑えることができる。したがって、水素ガスの貯蔵のために高圧に耐えうる貯蔵設備を要しないので、水素ガスの貯蔵に要するコストを抑えることができる。   According to the hydrogen gas generation system of this embodiment, hydrogen gas is generated by electrolysis of water by a pair of electrodes arranged at a predetermined depth in water, so that hydrogen gas having a pressure corresponding to the water pressure at such a depth is generated. Can be generated. Therefore, compared to a configuration in which hydrogen gas is generated above the water depth, high-pressure hydrogen gas can be generated without using equipment such as a compressor, and hydrogen gas can be generated while suppressing the cost required for hydrogen gas compression. . In addition, since the generated hydrogen gas is stored in the gas storage chamber into which the surrounding water flows, the hydrogen gas can be stored as it is at a pressure corresponding to the water pressure at the depth. Therefore, a large-scale facility that can withstand the pressure of the hydrogen gas is not required, and the storage cost of the hydrogen gas can be suppressed. Therefore, since storage equipment capable of withstanding high pressure is not required for storing hydrogen gas, the cost required for storing hydrogen gas can be suppressed.

（２）上記形態の水素ガス生成システムにおいて、前記電源は、前記水深よりも上方に位置し；前記電源と前記一対の電極とを電気的に接続する配線を、さらに備え；前記配線は、前記管に沿って配置され、少なくとも一部が前記管に固定されていてもよい。この形態の水素ガス生成システムによれば、電源と一対の電極とを電気的に接続する配線は、ガス貯蔵室内と水素回収装置とを連通する管に沿って配置され、少なくとも一部が前記管に固定されているので、配線が水中において何ら支持なく設置されている構成に比べて、配線の変位を抑制し、かかる変位に起因する配線の損傷を抑制できる。   (2) In the hydrogen gas generation system according to the above aspect, the power supply is located above the water depth; and further includes a wiring for electrically connecting the power supply and the pair of electrodes; It may be arranged along a tube and at least partly fixed to said tube. According to the hydrogen gas generation system of this aspect, the wiring that electrically connects the power supply and the pair of electrodes is arranged along a pipe that communicates the gas storage chamber with the hydrogen recovery device, and at least a part of the pipe is connected to the pipe. Therefore, compared to a configuration in which the wiring is installed without any support in water, the displacement of the wiring can be suppressed, and the damage to the wiring due to the displacement can be suppressed.

（３）上記形態の水素ガス生成システムにおいて、前記ガス貯蔵室は、前記ガス貯蔵室の外郭を形成する外壁部と、前記外壁部のうちの上方壁面から前記ガス貯蔵室内に突出する隔壁部であって、前記ガス貯蔵室内の上方の空間を水素貯蔵部と酸素貯蔵部とに区画する隔壁部と、を有し；前記一対の電極のうちの前記陰極は、前記水素貯蔵部の下方に配置され；前記一対の電極のうちの陽極は、前記酸素貯蔵部の下方に配置され；前記管は、前記水素貯蔵部と連通してもよい。この形態の水素ガス生成システムによれば、ガス貯蔵室は、ガス貯蔵室内の上方の空間を水素貯蔵部と酸素貯蔵部とに区画され、また、陰極は水素貯蔵部の下方に配置され、陽極は酸素貯蔵部の下方に配置され、管は水素貯蔵部と連通するので、水の電気分解により陽極から発生する酸素ガスを、管を介して水素回収装置に導くことを抑制でき、高濃度の水素ガスを水素回収装置に導くことができる。   (3) In the hydrogen gas generation system according to the above aspect, the gas storage chamber includes an outer wall that forms an outline of the gas storage chamber, and a partition that projects into the gas storage chamber from an upper wall surface of the outer wall. A partition that partitions an upper space in the gas storage chamber into a hydrogen storage unit and an oxygen storage unit; and the cathode of the pair of electrodes is disposed below the hydrogen storage unit. An anode of the pair of electrodes may be disposed below the oxygen storage unit; the tube may be in communication with the hydrogen storage unit. According to the hydrogen gas generation system of this aspect, the gas storage chamber is divided into a hydrogen storage unit and an oxygen storage unit in the space above the gas storage room, and the cathode is disposed below the hydrogen storage unit, and the anode is Is disposed below the oxygen storage unit, and the tube communicates with the hydrogen storage unit.Therefore, it is possible to suppress the oxygen gas generated from the anode due to the electrolysis of water from being led to the hydrogen recovery unit through the tube, and the high concentration Hydrogen gas can be led to a hydrogen recovery device.

本発明は、種々の形態で実現することも可能である。例えば、水素ガス貯蔵システム、水素ガス生成方法、水素ガス圧縮方法、水素ガス貯蔵方法等の形態で実現することができる。   The present invention can be realized in various forms. For example, it can be realized in the form of a hydrogen gas storage system, a hydrogen gas generation method, a hydrogen gas compression method, a hydrogen gas storage method, or the like.

本発明の一実施形態としての水素ガス生成システムの概略構成を示す説明図である。It is an explanatory view showing a schematic structure of a hydrogen gas generation system as one embodiment of the present invention. 水素ガス生成処理の手順を示す工程図である。FIG. 3 is a process diagram illustrating a procedure of a hydrogen gas generation process.

Ａ．実施形態：
Ａ１．システム構成：
図１は、本発明の一実施形態としての水素ガス生成システム１００の概略構成を示す説明図である。水素ガス生成システム１００は、海中において水の電気分解を行うことにより、水圧相当の圧力の水素ガスを生成して貯蔵する。水素ガス生成システム１００は、一対の電極１０と、ガス貯蔵室２０と、水素回収装置３０と、管４０と、配線５０とを備える。 A. Embodiment:
A1. System configuration:
FIG. 1 is an explanatory diagram showing a schematic configuration of a hydrogen gas generation system 100 as one embodiment of the present invention. The hydrogen gas generation system 100 generates and stores hydrogen gas at a pressure equivalent to water pressure by performing electrolysis of water in the sea. The hydrogen gas generation system 100 includes a pair of electrodes 10, a gas storage chamber 20, a hydrogen recovery device 30, a pipe 40, and a wiring 50.

一対の電極１０は、陰極１１と陽極１２とを備える。一対の電極１０は、水の電気分解に用いられる。一対の電極１０は、所定の水深Ｄ１の海底Ｂ１の近傍に配置され、周囲の水に曝されている。本実施形態において水深Ｄ１は、およそ７０００ｍ（メートル）である。一対の電極１０は、ガス貯蔵室２０内に配置されている。一対の電極１０には、配線５０を介して、後述の電源装置５１０から直流電力が供給される。これにより、陰極１１では、下記式（１）に示す化学反応が起こり、水素ガスが発生する。また、陽極１２では、下記式（２）に示す化学反応が起こり、酸素ガスが発生する。
２Ｈ２Ｏ＋２ｅ−→Ｈ２＋２ＯＨ−・・・（１）
２ＯＨ−→１／２Ｏ２＋Ｈ２Ｏ＋２ｅ−・・・（２） The pair of electrodes 10 includes a cathode 11 and an anode 12. The pair of electrodes 10 is used for electrolysis of water. The pair of electrodes 10 is arranged near the seabed B1 at a predetermined water depth D1, and is exposed to surrounding water. In the present embodiment, the water depth D1 is approximately 7000 m (meter). The pair of electrodes 10 are arranged in the gas storage chamber 20. DC power is supplied to the pair of electrodes 10 from a power supply device 510 described later via the wiring 50. As a result, a chemical reaction represented by the following formula (1) occurs in the cathode 11, and hydrogen gas is generated. At the anode 12, a chemical reaction represented by the following formula (2) occurs, and oxygen gas is generated.
2H 2 O + 2e − → H 2 + 2OH − (1)
2OH − → 1 / 2O 2 + H 2 O + 2e − (2)

ガス貯蔵室２０は、海底Ｂ１に固定して設置されている。ガス貯蔵室２０は、一対の電極１０のうちの陰極１１に電流が流れることにより陰極１１において発生する水素ガス、換言すると、水の電気分解により陰極１１に発生する水素ガスを貯蔵する。ガス貯蔵室２０は、外壁部２１と、隔壁部２２とを有する。外壁部２１および隔壁部２２は、いずれも耐食性に優れた樹脂、例えば、ポリエチレン（ＰＥ）により形成されている。後述するように、ガス貯蔵室２０の内部と外部とは連通しており、ガス貯蔵室２０の内圧と外圧の差圧は小さい。このため、ガス貯蔵室２０の材料として水深Ｄ１の水圧に耐え得るほどの耐久性は求められない。   The gas storage room 20 is fixedly installed on the sea floor B1. The gas storage chamber 20 stores hydrogen gas generated at the cathode 11 when current flows through the cathode 11 of the pair of electrodes 10, in other words, hydrogen gas generated at the cathode 11 by electrolysis of water. The gas storage chamber 20 has an outer wall 21 and a partition 22. The outer wall 21 and the partition 22 are both formed of a resin having excellent corrosion resistance, for example, polyethylene (PE). As described later, the inside and the outside of the gas storage chamber 20 communicate with each other, and the differential pressure between the internal pressure and the external pressure of the gas storage chamber 20 is small. For this reason, it is not required that the material of the gas storage chamber 20 be durable enough to withstand the water pressure at the water depth D1.

外壁部２１は、ガス貯蔵室２０の外殻を形成する。本実施形態において、外壁部２１は、略円筒状の下方部２１１と、下方部２１１の上方に連なる上方部２１２とを有する。上方部２１２は、中空の円錐状の外観形状を有する。下方部２１１における海底Ｂ１の近傍には、周方向に互いに所定の距離だけ離れた並んだ複数の連通孔２６が形成されている。かかる連通孔２６は、下方部２１１の厚さ方向を貫く貫通孔として形成されている。このため、かかる連通孔２６を介してガス貯蔵室２０内には周囲の海水が流入する。換言すると、ガス貯蔵室２０の内部と外部とは連通している。   The outer wall 21 forms an outer shell of the gas storage chamber 20. In the present embodiment, the outer wall portion 21 has a substantially cylindrical lower portion 211 and an upper portion 212 that continues above the lower portion 211. The upper part 212 has a hollow conical external shape. In the lower part 211, near the seabed B1, a plurality of communication holes 26 are formed, which are arranged at a predetermined distance from each other in the circumferential direction. The communication hole 26 is formed as a through hole penetrating the lower part 211 in the thickness direction. Therefore, the surrounding seawater flows into the gas storage chamber 20 through the communication hole 26. In other words, the inside and the outside of the gas storage chamber 20 communicate with each other.

隔壁部２２は、上方部２１２の上方壁面２９からガス貯蔵室２０内に向けて鉛直下方に突出する板状部材により形成されている。隔壁部２２は、ガス貯蔵室２０内における上方を、一対の気体貯蔵部２３に区画する。一対の気体貯蔵部２３は、水素貯蔵部２４と、酸素貯蔵部２５とを備える。水素貯蔵部２４は、陰極１１に対応する貯蔵室である。具体的には、水素貯蔵部２４は、陰極１１の上方に位置し、陰極１１において生成される水素ガスを貯蔵する。酸素貯蔵部２５は、陽極１２に対応する貯蔵室である。具体的には、酸素貯蔵部２５は、陽極１２の上方に位置し、陽極１２において生成される酸素ガスを貯蔵する。   The partition part 22 is formed of a plate-shaped member that projects vertically downward from the upper wall surface 29 of the upper part 212 into the gas storage chamber 20. The partition part 22 partitions the upper part in the gas storage chamber 20 into a pair of gas storage parts 23. The pair of gas storage units 23 includes a hydrogen storage unit 24 and an oxygen storage unit 25. The hydrogen storage unit 24 is a storage room corresponding to the cathode 11. Specifically, the hydrogen storage unit 24 is located above the cathode 11 and stores hydrogen gas generated at the cathode 11. The oxygen storage unit 25 is a storage room corresponding to the anode 12. Specifically, the oxygen storage unit 25 is located above the anode 12 and stores oxygen gas generated at the anode 12.

上述のように、ガス貯蔵室２０内は周りの水と連通しているため、ガス貯蔵室２０内において上記式（１）の化学反応により生じる水素ガスは、水深Ｄ１の水圧相当の圧力であるおよそ７０．９ＭＰａ（メガパスカル）の水素ガスである。したがって、水素貯蔵部２４には、およそ７０．９ＭＰａ（メガパスカル）の水素ガスが貯蔵される。   As described above, since the inside of the gas storage chamber 20 communicates with the surrounding water, the hydrogen gas generated by the chemical reaction of the above formula (1) in the gas storage chamber 20 has a pressure equivalent to the water pressure at the water depth D1. Hydrogen gas of about 70.9 MPa (megapascal). Therefore, hydrogen gas of about 70.9 MPa (megapascal) is stored in the hydrogen storage unit 24.

なお、ガス貯蔵室２０の外壁部２１には、一対の電極１０をそれぞれ各貯蔵部２４、２５に対応する位置に固定するための図示しない支持部が形成されている。なお、かかる支持部を、外壁部２１とは独立した部材として構成して海底Ｂ１に配置してもよい。   Note that a support (not shown) for fixing the pair of electrodes 10 to positions corresponding to the respective storages 24 and 25 is formed on the outer wall 21 of the gas storage 20. In addition, you may comprise such a support part as a member independent of the outer wall part 21, and arrange | position on the seabed B1.

外壁部２１の上方部２１２のうち、酸素貯蔵部２５に対応する領域には、排気口２７が形成されている。排気口２７は、上方部２１２の厚さ方向を貫く貫通孔として形成されている。したがって、酸素貯蔵部２５は、連通孔２６および排気口２７を介して周囲の水が流入可能に構成されている。排気口２７は、上記式（２）の化学反応により陽極１２において発生してガス貯蔵室２０に溜まった酸素ガスを、ガス貯蔵室２０の外部へと排出する。   An exhaust port 27 is formed in a region corresponding to the oxygen storage unit 25 in the upper part 212 of the outer wall part 21. The exhaust port 27 is formed as a through hole penetrating the thickness direction of the upper part 212. Therefore, the oxygen storage unit 25 is configured to allow surrounding water to flow in through the communication hole 26 and the exhaust port 27. The exhaust port 27 discharges oxygen gas generated in the anode 12 by the chemical reaction of the above formula (2) and accumulated in the gas storage chamber 20 to the outside of the gas storage chamber 20.

水素回収装置３０は、船５００に搭載されており、管４０を介して送られる水素ガスを回収する。水素回収装置３０は、遮断弁３１と、水素処理部３２とを備える。遮断弁３１は、電磁弁であり、図示しない制御装置からの制御信号に基づき、管４０の開閉を行う。水素処理部３２は、管４０を介してガス貯蔵室２０から送られてきた水素ガスを処理する。かかる処理としては、例えば、水素ガスの検査処理や、図示しない水素ガスタンクに水素ガスを充填する処理などが該当する。   The hydrogen recovery device 30 is mounted on the ship 500 and recovers hydrogen gas sent via the pipe 40. The hydrogen recovery device 30 includes a shutoff valve 31 and a hydrogen processing unit 32. The shutoff valve 31 is an electromagnetic valve, and opens and closes the pipe 40 based on a control signal from a control device (not shown). The hydrogen processing unit 32 processes the hydrogen gas sent from the gas storage chamber 20 via the pipe 40. As such a process, for example, a hydrogen gas inspection process, a process of filling a hydrogen gas tank (not shown) with hydrogen gas, and the like correspond.

管４０は、ガス貯蔵室２０内と水素回収装置３０とを連通し、ガス貯蔵室２０内の水素ガスを水素回収装置３０に導く。管４０の大部分は海中において鉛直方向に沿って配置されている。管４０の一端は図示しない固定金具によりガス貯蔵室２０に固定され、他端は遮断弁３１に接続されている。管４０の内部は、水素貯蔵部２４と連通している。管４０は、内圧と外圧の差圧に耐え得るように設計されている。具体的には、管４０の内圧は、ガス貯蔵室２０内の水素ガスの圧力と一致し、およそ７０．９ＭＰａである。これに対して、管４０の外圧は、水面上が最も小さくおよそ０．１ＭＰａであり、ガス貯蔵室２０の設置部分において最も大きくおよそ７０．９ＭＰａである。したがって、管４０は、最大差圧である７０．９ＭＰａと０．１ＭＰａとの差圧（７０．８ＭＰａ）に耐え得るように設計されている。本実施形態において、管４０は、ニッケルおよびチタンを含む合金により形成されている。管４０は、例えば、複数の部分管を継ぎ合わせて形成してもよい。   The pipe 40 communicates the inside of the gas storage room 20 with the hydrogen recovery device 30, and guides the hydrogen gas in the gas storage room 20 to the hydrogen recovery device 30. Most of the tubes 40 are arranged vertically in the sea. One end of the pipe 40 is fixed to the gas storage chamber 20 by a fixture (not shown), and the other end is connected to the shutoff valve 31. The inside of the tube 40 communicates with the hydrogen storage unit 24. The tube 40 is designed to withstand the pressure difference between the internal pressure and the external pressure. Specifically, the internal pressure of the pipe 40 matches the pressure of the hydrogen gas in the gas storage chamber 20, and is about 70.9 MPa. On the other hand, the external pressure of the pipe 40 is the smallest on the water surface, about 0.1 MPa, and the largest at the installation part of the gas storage chamber 20 is about 70.9 MPa. Therefore, the tube 40 is designed to withstand a pressure difference (70.8 MPa) between the maximum pressure difference of 70.9 MPa and 0.1 MPa. In the present embodiment, the tube 40 is formed of an alloy containing nickel and titanium. The tube 40 may be formed by joining a plurality of partial tubes, for example.

配線５０は、電源装置５１０と一対の電極１０とを電気的に接続する。配線５０は、管４０に沿って配置され、複数の位置において締結具４５により管４０に固定されている。このような構成により、潮流や波による変位に起因する配線５０の損傷を抑制できる。配線５０は、耐食性に優れた素材、例えばポリエチレンの被覆層で覆われている。電源装置５１０は、船５００に搭載された直流電源である。   The wiring 50 electrically connects the power supply device 510 and the pair of electrodes 10. The wiring 50 is arranged along the tube 40 and is fixed to the tube 40 by fasteners 45 at a plurality of positions. With such a configuration, it is possible to suppress damage to the wiring 50 due to displacement due to a tide or a wave. The wiring 50 is covered with a coating layer of a material having excellent corrosion resistance, for example, polyethylene. Power supply device 510 is a DC power supply mounted on ship 500.

船５００が図１に示す位置におらず、水素ガス生成システム１００による水素ガスの生成が行われない状況（以下、「水素ガス非生成状況」と呼ぶ）では、配線５０における一対の電極１０と接続された側とは反対側の端部は、電源装置５１０に接続されていない。また、水素ガス非生成状況では、管４０におけるガス貯蔵室２０と接続された側とは反対側の端部は、遮断弁３１に接続されていない。配線５０における電源装置５１０と接続されるべき端部と、管４０における遮断弁３１に接続されるべき端部とは、水素ガス非生成状況において、互いに締結具４５で固定されると共に、海面に浮かぶブイに固定されている。   In a situation where the ship 500 is not at the position shown in FIG. 1 and hydrogen gas is not generated by the hydrogen gas generation system 100 (hereinafter, referred to as a “non-hydrogen gas generation state”), the pair of electrodes 10 on the wiring 50 The end opposite to the connected side is not connected to power supply device 510. In the non-hydrogen gas generation state, the end of the pipe 40 opposite to the side connected to the gas storage chamber 20 is not connected to the shutoff valve 31. An end of the wiring 50 to be connected to the power supply device 510 and an end of the pipe 40 to be connected to the shut-off valve 31 are fixed to each other by the fastener 45 in a non-hydrogen gas generation state, and are connected to the sea surface. Fixed to a floating buoy.

Ａ２．水素ガス生成処理：
図２は、水素ガス生成処理の手順を示す工程表である。この水素ガス生成処理は、およそ７０．９ＭＰａの高圧水素ガスを生成するために実行される。 A2. Hydrogen gas generation processing:
FIG. 2 is a process chart showing the procedure of the hydrogen gas generation process. This hydrogen gas generation processing is performed to generate high-pressure hydrogen gas of approximately 70.9 MPa.

電源に接続された一対の電極１０を所定の水深Ｄ１において周囲の水に曝して配置する（工程Ｐ１０５）。この工程Ｐ１０５は、複数の工程を含む。具体的には、海底Ｂ１にガス貯蔵室２０と一対の電極１０とを配置する工程と、管４０をガス貯蔵室２０に接続する工程と、管４０に沿って配線５０を配置すると共に、複数の締結具４５により配線５０を管４０に固定する工程と、管４０の海上側の端部と配線５０の海上側端部とを、図示しないブイに取り付ける工程と、電源装置５１０および水素回収装置３０を積載した船５００を、ガス貯蔵室２０の上方の位置に配置する工程と、ブイに取り付けられた配線５０の端部を電源装置５１０に接続する工程と、ブイに取り付けられた管４０の端部を遮断弁３１に接続する工程と、を含む。なお、これらの工程のうちの多くの工程は、例えば、作業アームを有する潜水艇を利用して行なってもよい。   The pair of electrodes 10 connected to the power supply is arranged at a predetermined water depth D1 by exposing it to surrounding water (step P105). This step P105 includes a plurality of steps. Specifically, a step of arranging the gas storage chamber 20 and the pair of electrodes 10 on the seabed B1, a step of connecting the pipe 40 to the gas storage chamber 20, and a step of arranging the wiring 50 along the pipe 40 are performed. Fixing the wiring 50 to the pipe 40 with the fastener 45, attaching the seaside end of the pipe 40 and the seaside end of the wiring 50 to a buoy (not shown), the power supply device 510 and the hydrogen recovery device. Arranging the ship 500 loaded with 30 at a position above the gas storage chamber 20; connecting the end of the wiring 50 attached to the buoy to the power supply device 510; Connecting the end to the shut-off valve 31. Many of these steps may be performed using, for example, a submersible vehicle having a working arm.

一対の電極１０に電流を流すことにより、陰極１１から水素ガスを発生させる（工程Ｐ１１０）。工程Ｐ１１０により発生した水素ガスをガス貯蔵室２０、より詳細には、水素貯蔵部２４に貯蔵する（工程Ｐ１１５）。ガス貯蔵室２０内に貯蔵された水素ガスを、管４０を用いて水素回収装置３０に導く（工程Ｐ１２０）。このようにして、水深Ｄ１に配置された一対の電極１０のうちの陰極１１において発生したおよそ７０．９ＭＰａの水素ガスは、ガス貯蔵室２０において貯蔵され、また、管４０を介して水素処理部３２へと導かれる。   By passing a current through the pair of electrodes 10, hydrogen gas is generated from the cathode 11 (Step P110). The hydrogen gas generated in step P110 is stored in the gas storage chamber 20, more specifically, in the hydrogen storage unit 24 (step P115). The hydrogen gas stored in the gas storage chamber 20 is guided to the hydrogen recovery device 30 using the pipe 40 (Step P120). In this manner, the hydrogen gas of about 70.9 MPa generated at the cathode 11 of the pair of electrodes 10 arranged at the water depth D1 is stored in the gas storage chamber 20, and is further processed through the pipe 40 through the hydrogen processing unit. It is led to 32.

以上説明した実施形態の水素ガス生成システム１００によれば、海中において予め定められた水深Ｄ１に配置された一対の電極１０による水の電気分解によって水素ガスを生成するので、かかる水深Ｄ１の水圧、すなわち、およそ７０．９ＭＰａの圧力の水素ガスを発生させることができる。したがって、かかる水深Ｄ１よりも上方において水素ガスを生成する構成に比べて高圧の水素ガスを、圧縮機などの設備を用いずに生成でき、水素ガスの圧縮に要するコストを抑えて水素ガスを生成できる。加えて、生成された水素ガスを周囲の水が流入するガス貯蔵室２０に貯蔵するので、水素ガスを、かかる水深の水圧に相当する圧力の水素ガスのまま貯蔵することができる。このため、水素ガスの圧力に耐え得るほどの大掛かりな設備を要せず、水素ガスの貯蔵コストを抑えることができる。したがって、水素ガスの貯蔵のために高圧に耐えうる貯蔵設備を要しないので、水素ガスの貯蔵に要するコストを抑えることができる。   According to the hydrogen gas generation system 100 of the embodiment described above, the hydrogen gas is generated by the electrolysis of water by the pair of electrodes 10 arranged in the sea at a predetermined water depth D1. That is, hydrogen gas at a pressure of about 70.9 MPa can be generated. Therefore, compared to a configuration in which hydrogen gas is generated above the water depth D1, high-pressure hydrogen gas can be generated without using a facility such as a compressor, and the cost required for compressing hydrogen gas can be reduced to generate hydrogen gas. it can. In addition, since the generated hydrogen gas is stored in the gas storage chamber 20 into which the surrounding water flows, the hydrogen gas can be stored as it is at a pressure corresponding to the water pressure at the water depth. Therefore, a large-scale facility that can withstand the pressure of the hydrogen gas is not required, and the storage cost of the hydrogen gas can be suppressed. Therefore, since storage equipment capable of withstanding high pressure is not required for storing hydrogen gas, the cost required for storing hydrogen gas can be suppressed.

また、電源装置５１０と一対の電極１０とを電気的に接続する配線５０は、ガス貯蔵室２０内と水素回収装置３０とを連通する管４０に沿って配置され、複数個所において管４０に固定されているので、配線５０が海中において何ら支持なく設置されている構成に比べて、潮流や波による変位を抑制して配線５０の損傷を抑制できる。   The wiring 50 that electrically connects the power supply device 510 and the pair of electrodes 10 is disposed along the pipe 40 that communicates the inside of the gas storage chamber 20 with the hydrogen recovery device 30, and is fixed to the pipe 40 at a plurality of locations. Therefore, compared to a configuration in which the wiring 50 is installed without any support in the sea, displacement due to a tidal current or a wave can be suppressed, and damage to the wiring 50 can be suppressed.

また、ガス貯蔵室２０は、ガス貯蔵室２０内の上方の空間を水素貯蔵部２４と酸素貯蔵部２５とに区画され、また、陰極１１は水素貯蔵部２４の下方に配置され、陽極１２は酸素貯蔵部２５の下方に配置され、管４０は水素貯蔵部２４と連通するので、水の電気分解により陽極１２から発生する酸素ガスを、管４０を介して水素回収装置３０に導くことを抑制でき、高濃度の水素ガスを水素回収装置３０に導くことができる。   Further, the gas storage room 20 divides an upper space in the gas storage room 20 into a hydrogen storage unit 24 and an oxygen storage unit 25, and the cathode 11 is disposed below the hydrogen storage unit 24, and the anode 12 is Since the tube 40 is disposed below the oxygen storage unit 25 and communicates with the hydrogen storage unit 24, it is possible to prevent the oxygen gas generated from the anode 12 by the electrolysis of water from being led to the hydrogen recovery device 30 via the tube 40. Thus, high-concentration hydrogen gas can be guided to the hydrogen recovery device 30.

Ｂ．他の実施形態：
Ｂ１．他の実施形態１：
上記実施形態では、電源装置５１０は、船５００に積載されていたが、本開示はこれに限定されない。例えば、海底油田から原油を掘削するためのリグやプラットフォームや、水素ガス製造のための専用のリグやプラットフォームに積載されてもよい。また、例えば、電源装置５１０は、陸上に配置されていてもよい。かかる構成においては、電源装置５１０と一対の電極１０とを接続する配線を、陸上に近い位置まで海底Ｂ１に沿って配置し、電源装置５１０の配置位置近傍において、鉛直に配置して電源装置５１０と接続させてもよい。また、例えば、電源装置５１０を海中に配置してもよい。かかる構成においては、電源装置５１０を二次電池などにより構成し、充電後の電源装置５１０を海底Ｂ１に配置しておいてもよい。かかる構成においては、電源装置５１０を、スクリューや舵を備えた潜水艇として構成し、蓄電量が所定の閾値以下になった場合には、かかる電源装置５１０を海上まで浮上させるようにしてもよい。そして、充電後の電源装置５１０をガス貯蔵室２０の近傍まで沈降させてもよい。 B. Other embodiments:
B1. Other Embodiment 1:
In the above embodiment, the power supply device 510 is loaded on the ship 500, but the present disclosure is not limited to this. For example, it may be loaded on a rig or platform for drilling crude oil from an offshore oil field or a dedicated rig or platform for producing hydrogen gas. Further, for example, power supply device 510 may be arranged on land. In such a configuration, the wiring connecting the power supply device 510 and the pair of electrodes 10 is arranged along the seabed B1 to a position close to land, and is arranged vertically near the position where the power supply device 510 is arranged. May be connected. Further, for example, the power supply device 510 may be arranged underwater. In such a configuration, the power supply device 510 may be formed of a secondary battery or the like, and the charged power supply device 510 may be disposed on the sea floor B1. In such a configuration, power supply device 510 may be configured as a submersible vehicle equipped with a screw and a rudder, and when the charged amount falls below a predetermined threshold value, power supply device 510 may be floated to the sea. . Then, the charged power supply device 510 may be settled to the vicinity of the gas storage room 20.

Ｂ２．他の実施形態２：
上記実施形態において、隔壁部２２を省略してもよい。かかる構成においては、排気口２７を省略してもよい。かかる構成においては、ガス貯蔵室２０内に、水素ガスと酸素ガスの両方のガスが貯蔵されることとなる。しかし、水素ガスは、酸素ガスよりも比重が軽いため、ガス貯蔵室２０の内部においてより上方に貯蔵される。また、管４０は、ガス貯蔵室２０における上方部２１２と接続されている。このため、かかる構成においても、ガス貯蔵室２０に貯蔵された水素ガスを酸素ガスに比べて優先して、管４０を介して水素回収装置３０に導くことができる。 B2. Other Embodiment 2:
In the above embodiment, the partition 22 may be omitted. In such a configuration, the exhaust port 27 may be omitted. In such a configuration, both the hydrogen gas and the oxygen gas are stored in the gas storage chamber 20. However, since the specific gravity of the hydrogen gas is lower than that of the oxygen gas, the hydrogen gas is stored higher inside the gas storage chamber 20. The pipe 40 is connected to the upper part 212 of the gas storage chamber 20. Therefore, even in such a configuration, the hydrogen gas stored in the gas storage chamber 20 can be guided to the hydrogen recovery device 30 via the pipe 40 with priority over the oxygen gas.

Ｂ３．他の実施形態３：
上記実施形態では、水の電気分解により水素ガスを生成していたが、他の方法により水素ガスを生成してもよい。例えば、水深Ｄ１の水圧で開放される排気口を備えた断熱容器に液体水素を充填して、かかる断熱容器を船５００からガス貯蔵室２０に向かって投下して沈降させてもよい。また、かかる構成においては、断熱容器がガス貯蔵室２０内に向かうようにガイドする部材を予め用意してもよい。かかる構成では、沈降する断熱容器の排気口は、海底Ｂ１に達すると開く。このとき、断熱容器内に充填されていた液体水素が急激に気化して水素ガスが発生して断熱容器の外部へと排出される。断熱容器がガス貯蔵室２０内にガイドされる構成においては、断熱容器から排出された水素ガスはガス貯蔵室２０内に貯留されることとなる。なお、断熱容器としては、例えば、およそ７０．９ＭＰａの圧力（差圧）に耐え得る材料により形成された二重構造の容器を用いてもよい。また、かかる容器の外観形状を、略球状の外観形状としてもよい。かかる構成によれば、断熱容器を、より高圧に耐え得るようにできる。また、水深Ｄ１の水圧で開放される排気口としては、例えば、弁体と、かかる弁体を断熱容器の内側から外側に向けて付勢するバネ部材とを有する弁装置を備えた排気口として構成してもよい。かかる構成においては、バネ部材の付勢力を水深Ｄ１における水圧よりも小さく設定しておくことにより、水深Ｄ１の水圧で排気口を開放することができる。 B3. Other Embodiment 3:
In the above embodiment, the hydrogen gas is generated by the electrolysis of water, but the hydrogen gas may be generated by another method. For example, liquid hydrogen may be filled in an insulated container provided with an exhaust port that is opened at a water pressure of a water depth D1, and the insulated container may be dropped from the ship 500 toward the gas storage room 20 and settled. In such a configuration, a member that guides the heat-insulating container toward the inside of the gas storage chamber 20 may be prepared in advance. In such a configuration, the exhaust port of the sinking insulating container opens when it reaches the sea floor B1. At this time, the liquid hydrogen filled in the heat insulating container is rapidly vaporized and hydrogen gas is generated and discharged to the outside of the heat insulating container. In the configuration in which the heat insulating container is guided into the gas storage room 20, the hydrogen gas discharged from the heat insulating container is stored in the gas storage room 20. As the heat insulating container, for example, a container having a double structure formed of a material that can withstand a pressure (differential pressure) of about 70.9 MPa may be used. Further, the outer shape of the container may be a substantially spherical outer shape. According to such a configuration, the heat insulating container can withstand higher pressure. The exhaust port opened by the water pressure at the water depth D1 is, for example, an exhaust port provided with a valve device having a valve element and a spring member for urging the valve element from the inside to the outside of the heat insulating container. You may comprise. In such a configuration, by setting the urging force of the spring member to be smaller than the water pressure at the water depth D1, the exhaust port can be opened at the water pressure at the water depth D1.

Ｂ４．他の実施形態４：
上記実施形態においてガス貯蔵室２０は、海底Ｂ１に固定的に設置されていたが、これに代えて、ガス貯蔵室２０を移動式の部屋としてもよい。具体的には、通常時はガス貯蔵室２０を船５００に積載しておき、水素ガス生成処理の工程Ｐ１０５において、ガス貯蔵室２０を船５００から海中に投下して、海底Ｂ１近傍まで沈降させてもよい。このとき、管４０をガイド部材として利用してガス貯蔵室２０を沈降させてもよい。例えば、上方部２１２に排気口２７とは別に貫通孔を予め形成しておき、かかる貫通孔に管４０を挿入して、その状態のまま管４０によってガイドされながらガス貯蔵室２０を沈降させてもよい。この構成においては、ガス貯蔵室２０が最も沈降した状態において、貫通孔から管４０が外れないように、管４０の端部を大きなフランジ状に形成しておいてもよい。また、かかる構成においては、一対の電極１０を予めガス貯蔵室２０に固定しておき、ガス貯蔵室２０と一緒に沈降させてもよい。 B4. Other Embodiment 4:
In the above embodiment, the gas storage room 20 is fixedly installed on the sea floor B1, but instead, the gas storage room 20 may be a mobile room. Specifically, the gas storage room 20 is normally loaded on the ship 500, and in the hydrogen gas generation process P105, the gas storage room 20 is dropped from the ship 500 into the sea and settled to near the seabed B1. You may. At this time, the gas storage chamber 20 may be settled using the pipe 40 as a guide member. For example, a through hole is formed in advance in the upper part 212 separately from the exhaust port 27, and the pipe 40 is inserted into the through hole, and the gas storage chamber 20 is settled while being guided by the pipe 40 in that state. Is also good. In this configuration, the end of the pipe 40 may be formed in a large flange shape so that the pipe 40 does not come off from the through-hole when the gas storage chamber 20 is in the lowest state. In such a configuration, the pair of electrodes 10 may be fixed to the gas storage chamber 20 in advance, and may be settled together with the gas storage chamber 20.

Ｂ５．他の実施形態５：
各実施形態において、ガス貯蔵室２０は、水深７０００ｍの海底に配置されていたが、本開示はこれに限定されない。例えば、水深１０ｍから８０００ｍまでの範囲における任意の水深に配置されてもよい。より好ましくは、水深１００ｍから７０００ｍまでの範囲における任意の水深に配置されてもよい。この構成においては、かかる水深の位置が海底でなくてもよい。さらに、海に限らず、湖や沼など、任意の水環境に配置されてもよい。 B5. Other Embodiment 5:
In each embodiment, the gas storage room 20 is disposed on the seabed at a depth of 7000 m, but the present disclosure is not limited to this. For example, it may be arranged at an arbitrary water depth in a range from a depth of 10 m to 8000 m. More preferably, it may be arranged at an arbitrary water depth in a range from a water depth of 100 m to 7000 m. In this configuration, the position of the water depth does not have to be the seabed. Furthermore, it may be arranged not only in the sea but also in any water environment such as a lake or a swamp.

Ｂ６．他の実施形態６：
上記実施形態における水素ガス生成システム１００の構成は、あくまでも一例であり、様々に変更可能である。例えば、隔壁部２２を省略しないまま排気口２７のみを省略してもよい。また、水素回収装置３０は、船５００に積載されていたが、これに代えて、陸上または海中に配置されていてもよい。水素回収装置３０が海中に配置される構成においては、一対の電極１０が配置された水深よりも上方に配置することにより、かかる水深において水素ガスを発生させる構成に比べて、より圧力の高い水素ガスを回収できる。また、上記実施形態において外壁部２１および隔壁部２２は、ポリエチレンにより形成されていたが、ポリエチレンに代えて、他の任意の種類の樹脂、金属、およびセラミックス等の任意の材料により形成されてもよい。また、水素回収装置３０が圧縮機を備える構成としてもよい。かかる構成においては、例えば、ガス貯蔵室２０が水深７０００ｍよりも浅い水深の位置に配置されている場合に、７０．９ＭＰａよりも低い圧力の水素ガスを、圧縮機を用いてさらに７０．９ＭＰａまで圧縮することができる。このような構成においても、かかる水深の圧力よりも低い圧力の水素ガスを７０．９ＭＰａまで圧縮する構成に比べて、例えば、多段に圧縮する複数の圧縮機のうちの一部を省略できる、或いは、圧縮に要する電力を抑えることができる、といった効果を奏する。また、上記実施形態において、工程Ｐ１２０を省略してもよい。すなわち、水素ガス生成処理から回収工程を省略し、別処理として回収処理を実行してもよい。また、上記実施形態において、水素回収装置３０は、ガス貯蔵室２０内の水素ガスを、管４０を介して水素処理部３２に積極的に送るためのポンプを備えてもよい。また、上記実施形態において、海水中の配線５０の全体が管４０に固定されていてもよい。 B6. Other Embodiment 6:
The configuration of the hydrogen gas generation system 100 in the above embodiment is merely an example, and can be variously changed. For example, only the exhaust port 27 may be omitted without omitting the partition 22. Further, the hydrogen recovery device 30 is loaded on the ship 500, but may be arranged on land or in the sea instead. In the configuration in which the hydrogen recovery device 30 is disposed in the sea, by disposing the hydrogen recovery device 30 above the water depth at which the pair of electrodes 10 are disposed, compared with the configuration in which hydrogen gas is generated at the water depth, the hydrogen recovery device 30 has a higher pressure. Gas can be recovered. In the above embodiment, the outer wall 21 and the partition 22 are made of polyethylene, but may be made of any other material such as resin, metal, and ceramic instead of polyethylene. Good. Further, the hydrogen recovery device 30 may be configured to include a compressor. In such a configuration, for example, when the gas storage chamber 20 is disposed at a position at a depth of shallower than 7000 m, hydrogen gas having a pressure lower than 70.9 MPa is further reduced to 70.9 MPa using a compressor. Can be compressed. In such a configuration, for example, compared to a configuration in which hydrogen gas having a pressure lower than the water depth is compressed to 70.9 MPa, for example, a part of a plurality of compressors that compress in multiple stages can be omitted, or Thus, the power required for compression can be suppressed. In the above embodiment, the step P120 may be omitted. That is, the recovery process may be omitted from the hydrogen gas generation process, and the recovery process may be executed as a separate process. Further, in the above embodiment, the hydrogen recovery device 30 may include a pump for positively sending the hydrogen gas in the gas storage chamber 20 to the hydrogen processing unit 32 via the pipe 40. Further, in the above embodiment, the entire wiring 50 in the seawater may be fixed to the pipe 40.

本発明は、上記実施形態に限られるものではなく、その趣旨を逸脱しない範囲において種々の構成で実現することができる。例えば、発明の概要の欄に記載した各形態中の技術的特徴に対応する実施形態中の技術的特徴は、上述の課題の一部又は全部を解決するために、あるいは、上述の効果の一部又は全部を達成するために、適宜、差し替えや、組み合わせを行うことが可能である。また、その技術的特徴が本明細書中に必須なものとして説明されていなければ、適宜、削除することが可能である。   The present invention is not limited to the above embodiment, and can be realized with various configurations without departing from the spirit of the invention. For example, the technical features in the embodiments corresponding to the technical features in each embodiment described in the summary of the invention may be used to solve some or all of the above-described problems, or to provide one of the above-described effects. In order to achieve a part or all, replacement or combination can be appropriately performed. If the technical features are not described as essential in this specification, they can be deleted as appropriate.

１０…一対の電極、１１…陰極、１２…陽極、２０…ガス貯蔵室、２１…外壁部、２２…隔壁部、２３…一対の気体貯蔵部、２４…水素貯蔵部、２５…酸素貯蔵部、２６…開口、２７…排気口、２９…上方壁面、３０…水素回収装置、３１…遮断弁、３２…水素処理部、４０…管、４５…締結具、５０…配線、１００…水素ガス生成システム、２１１…下方部、２１２…上方部、５００…船、５１０…電源装置、Ｂ１…海底、Ｄ１…水深 DESCRIPTION OF SYMBOLS 10 ... pair of electrodes, 11 ... cathode, 12 ... anode, 20 ... gas storage chamber, 21 ... outer wall part, 22 ... partition part, 23 ... one pair of gas storage parts, 24 ... hydrogen storage part, 25 ... oxygen storage part, 26 opening, 27 exhaust port, 29 upper wall surface, 30 hydrogen recovery device, 31 shut-off valve, 32 hydrogen processing unit, 40 pipe, 45 fastener, 50 wiring, 100 hydrogen gas generation system , 211: lower part, 212: upper part, 500: ship, 510: power supply device, B1: sea floor, D1: water depth

Claims (4)

水素ガス生成システムであって、
水中の予め定められた水深に配置され、電源に接続された水の電気分解用の一対の電極と、
前記水深に配置され、周囲の水が流入可能な連通孔を有するガス貯蔵室であって、電気分解により前記一対の電極のうちの陰極において発生する水素ガスを貯蔵するガス貯蔵室と、
前記水深よりも上方に配置された水素回収装置と、
前記ガス貯蔵室内の水素ガスを前記水素回収装置に導く管と、
を備える、水素ガス生成システム。 A hydrogen gas generation system,
A pair of electrodes for water electrolysis arranged at a predetermined depth in the water and connected to a power source,
A gas storage chamber that is disposed at the water depth and has a communication hole through which surrounding water can flow, and a gas storage chamber that stores hydrogen gas generated at a cathode of the pair of electrodes by electrolysis,
A hydrogen recovery device disposed above the water depth,
A pipe for guiding hydrogen gas in the gas storage chamber to the hydrogen recovery device,
A hydrogen gas generation system comprising: 請求項１に記載の水素ガス生成システムにおいて、
前記電源は、前記水深よりも上方に位置し、
前記電源と前記一対の電極とを電気的に接続する配線を、さらに備え、
前記配線は、前記管に沿って配置され、少なくとも一部が前記管に固定されている、水素ガス生成システム。 The hydrogen gas generation system according to claim 1,
The power source is located above the water depth,
A wiring for electrically connecting the power supply and the pair of electrodes;
The hydrogen gas generation system, wherein the wiring is arranged along the pipe, and at least a part of the wiring is fixed to the pipe. 請求項１または請求項２に記載の水素ガス生成システムにおいて、
前記ガス貯蔵室は、前記ガス貯蔵室の外郭を形成する外壁部と、前記外壁部のうちの上方壁面から前記ガス貯蔵室内に突出する隔壁部であって、前記ガス貯蔵室内の上方の空間を水素貯蔵部と酸素貯蔵部とに区画する隔壁部と、を有し、
前記一対の電極のうちの前記陰極は、前記水素貯蔵部の下方に配置され、
前記一対の電極のうちの陽極は、前記酸素貯蔵部の下方に配置され、
前記管は、前記水素貯蔵部と連通する、水素ガス生成システム。 In the hydrogen gas generation system according to claim 1 or 2,
The gas storage chamber is an outer wall that forms an outer shell of the gas storage chamber, and a partition that protrudes into the gas storage chamber from an upper wall surface of the outer wall, and defines a space above the gas storage chamber. Having a partition portion partitioned into a hydrogen storage portion and an oxygen storage portion,
The cathode of the pair of electrodes is disposed below the hydrogen storage unit,
An anode of the pair of electrodes is disposed below the oxygen storage unit,
The hydrogen gas generation system, wherein the pipe communicates with the hydrogen storage unit. 水素ガスの生成方法であって、
電源に接続された水の電気分解用の一対の電極を、水中における予め定められた水深において周囲の水に曝して配置する工程と、
前記一対の電極に電流を流すことにより、前記一対の電極のうちの陰極から水素ガスを発生させる工程と、
前記発生した水素ガスを、前記水深に配置され、周囲の水と連通するガス貯蔵室に貯蔵する工程と、
前記水深よりも上方に配置された水素回収装置と前記ガス貯蔵室とを連通する管を介して、前記ガス貯蔵室内に貯蔵された水素ガスを、前記水素回収装置に導く工程と、
を備える、水素ガスの生成方法。 A method for producing hydrogen gas,
A step of arranging a pair of electrodes for electrolysis of water connected to a power source by exposing the surrounding water to a predetermined depth in water,
By passing a current to the pair of electrodes, a step of generating hydrogen gas from the cathode of the pair of electrodes,
Storing the generated hydrogen gas in a gas storage chamber disposed at the water depth and communicating with surrounding water;
Via a pipe that communicates the hydrogen storage device and the gas storage chamber disposed above the water depth, a step of guiding the hydrogen gas stored in the gas storage room to the hydrogen recovery device,
A method for generating hydrogen gas, comprising:
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