JP4156884B2 - Water electrolysis hydrogen gas production equipment - Google Patents

Water electrolysis hydrogen gas production equipment Download PDF

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Publication number
JP4156884B2
JP4156884B2 JP2002260886A JP2002260886A JP4156884B2 JP 4156884 B2 JP4156884 B2 JP 4156884B2 JP 2002260886 A JP2002260886 A JP 2002260886A JP 2002260886 A JP2002260886 A JP 2002260886A JP 4156884 B2 JP4156884 B2 JP 4156884B2
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gas
water electrolysis
water
pure water
electrolysis
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JP2004099944A (en
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孝治 中沢
規夫 小村
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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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
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/70—Assemblies comprising two or more cells
    • C25B9/73—Assemblies comprising two or more cells of the filter-press type
    • 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

Description

【０００１】
【発明の属する技術分野】
本発明は、水の電解により水素を製造する水電解水素ガス製造装置に関するものである。
【０００２】
【従来の技術】
従来、水の電解により水素を製造する水電解装置として、固体高分子電解質膜を１対の触媒層で挟持し、各触媒層の上にそれぞれ多孔質給電体を積層した構成を備える水電解セルを複数積層した水電解セルスタックを備えるものが知られている。前記水電解装置では、各水電解セルの前記触媒層と多孔質給電体とに、８０℃程度に加熱された純水を供給し、各多孔質給電体に電圧を印加する。このようにすると、各水電解セルの陽極側では次式（１）のように水の電解が起きて酸素と水素イオンとが生成し、電子が電極に与えられる。前記水素イオンは、前記固体高分子電解質膜を透過して陰極側に移動し、陰極側の電極から電子を与えられる。この結果、各水電解セルの陰極側では次式（２）のように水素が生成する。
【０００３】
２Ｈ２Ｏ → Ｏ２↑ ＋ ４Ｈ ＋ ＋ ４ｅ− ・・・（１）
２Ｈ ＋ ＋ ２ｅ− → Ｈ２↑ ・・・（２）
そこで、前記水電解装置では、各水電解セルの前記陰極側に生成した水素を取り出して、所定の用途に供給する。前記水素は、例えば燃料電池の燃料として使用される。
【０００４】
一方、前記水電解装置では、各水電解セルの前記陽極側に生成した酸素は、純水との気液混合物として取り出される。このとき、前記純水は高価であるので、気液分離装置により酸素と分離、回収して、再利用に供することが行われている（例えば、特許文献１参照。）。前記従来の水電解装置では、前記気液分離装置は、前記水電解セルスタックとは独立に設けられ、配管を介して該水電解セルスタックに接続されている。
【０００５】
しかしながら、前記従来の水電解装置では、回収された純水は水としての純度の低下が避けられず、そのままでは再利用に供することが難しいという不都合がある。
【０００６】
【特許文献１】
特開平８−２６０１７６号公報
【０００７】
【発明が解決しようとする課題】
本発明は、かかる不都合を解消して、回収された純水を容易に再利用に供することができる水電解水素ガス製造装置を提供することを目的とする。
【０００８】
【課題を解決するための手段】
かかる目的を達成するために、本発明の水電解水素ガス製造装置は、１対の触媒層と、両触媒層に挟持された電解質膜とを備え、該触媒層に供給された純水の電解を行って、一方の触媒層から水素を取り出し、他方の触媒層から酸素と純水との気液混合物を取り出す水電解手段と、該水電解手段から取り出された酸素と純水との気液混合物から純水を分離する気液分離手段とを備える水電解水素ガス製造装置において、該気液分離手段を、該水電解手段の一側面に接して、該水電解手段から酸素と純水との気液混合物が取り出される取出口に配管を介することなく直接接続させて設け、該気液混合物は該取出口を介して該気液分離手段に直接流入すると共に、該気液分離手段により分離された純水を該水電解手段に還流させる還流手段とを備えることを特徴とする。
【０００９】
本発明の水電解水素ガス製造装置では、前記気液分離手段を、前記水電解手段から酸素と純水との気液混合物が取り出される取出口に直接接続し、前記取出口から前記気液混合物が、該気液分離手段に直接流入するようにしたので、該気液分離手段は配管を介して該水電解手段に接続する必要がない。この結果、前記水電解手段に供給された純水は、電解に供された後、前記酸素との気液混合物として該気液分離手段に直接流入することになるので、温度の低下と、水としての純度の低下を抑制することができる。
【００１０】
従って、本発明の水電解水素ガス製造装置によれば、回収された純水を容易に再利用に供することができる。また、本発明の水電解水素ガス製造装置によれば、回収された純水の温度の低下が抑制されるので、該純水を加熱するヒーター等の加熱手段を用いる必要がなく、エネルギー効率を向上させることができる。
【００１１】
また、本発明の水電解水素ガス製造装置は、前記還流手段により還流される純水をイオン交換樹脂により精製する精製手段を備え、該精製手段により精製された純水を前記水電解手段に還流させることが好ましい。本発明の水電解水素ガス製造装置によれば、回収された純水は、前述のように水としての純度の低下が抑制されている。従って、回収された純水は、前記還流手段により前記水電解手段に還流する際に、前記イオン交換樹脂のような簡易な手段を用いて精製すればよく、前記電解に必要とされる純度を容易に回復することができる。また、このようにすることにより、新たに純水を製造するためのエネルギーを低減することができる。前記精製手段は、前記水電解手段に隣接して備えられることにより、配管を低減して、回収された純水の温度、水としての純度の低下を抑制することができる。
【００１２】
また、本発明の水電解水素ガス製造装置は、前記気液分離手段が、前記水電解手段に供給される未使用の純水を、外部から該気液分離手段に取り入れる取入口を備えることが好ましい。このようにすることにより、未使用の純水は前記取入口から前記気液分離手段に供給され、該気液分離手段内で前記回収された純水と合流して、前記水電解手段に供給される。従って、前記回収された純水の還流手段と、未使用の純水を前記水電解手段に供給するための供給手段とが共通化され、装置構成を簡略化することができる。
【００１３】
また、前記気液分離手段は、酸素と純水とを分離するフィルターを備えることが好ましい。前記気液分離手段は、前記フィルターを備えることにより、少ない容積で効率よく酸素と純水とを分離することができる。前記フィルターとしては、例えば、ステンレス製の網を用いることができる。
【００１４】
【発明の実施の形態】
次に、添付の図面を参照しながら本発明の実施の形態についてさらに詳しく説明する。図１は本実施形態の水電解水素ガス製造装置の説明的断面図であり、図２は図１に示す水電解水素ガス製造装置の要部を拡大して示す説明的断面図である。
【００１５】
本実施形態の水電解水素ガス製造装置は、図１に示すように、水電解セルスタック１と、水電解セルスタック１の一側面に接して、配管を介することなく直接接続された気液分離装置２とを備えている。気液分離装置２は、水電解セルスタック１との間に、水電解セルスタック１から酸素と純水との気液混合物が取り出される気液取出口３を備えている。
【００１６】
また、気液分離装置２は、未使用の純水を取り入れる純水取入口４、前記気液混合物を酸素と純水とに分離するフィルター５、分離された酸素を大気中に放出する酸素放出口６を備えている。また、フィルター５はステンレス網からなる。
【００１７】
本実施形態の水電解水素ガス製造装置は、さらに、気液分離装置２の下方にポンプ８を備えている。ポンプ８は、水電解セルスタック１と気液分離装置２との底部に沿って設けられた導管８ａを介して、前記気液混合物から分離された純水７を水電解セルスタック１に還流する。そして、導管８ａの途中に、ポンプ８により還流される純水をイオン交換樹脂により精製する精製装置９が介装され、水電解セルスタック１に隣接して設けられている。
【００１８】
水電解セルスタック１は、酸素取出口３を備える一方、電解により精製した水素を取り出す水素取出口１０を備えている。また、水電解セルスタック１は、図２に示すように、固体高分子電解質膜１１が１対の触媒層１２，１３に挟持され、さらに触媒層１２，１３上に多孔質給電体１４，１５を備える水電解セル１６が、気液通路を兼ねるセパレータ１７を介して、複数積層された構成となっている。
【００１９】
前記水電解セル１６において、触媒層１２，１３は、例えば、固体高分子電解質膜１１と同一成分からなる電解質を溶解した電解質溶液に所定量の触媒粉末を分散させてペースト状にしたものをポリテトラフルオロエチレン製シートにスクリーン印刷することにより形成されている。そして、前記シートの触媒層１２，１３が形成された面で固体高分子電解質膜１１を挟持した状態でホットプレスすることにより、触媒層１２，１３が固体高分子電解質膜１１側に転写され、固体高分子電解質膜１１と接合されている。
【００２０】
次に、本実施形態の水電解水素ガス製造装置の作動について説明する。
【００２１】
本実施形態の水電解水素ガス製造装置では、まず、８０℃程度に加熱された未使用の純水が気液分離装置２の純水取入口４から供給され、ポンプ８により精製装置９を介して水電解セルスタック１に供給され、電解される。この結果、水電解セルスタック１を構成する各水電解セル１６の陰極側からは水素が生成し、水電解セルスタック１の水素取出口１０から外部に取り出される。一方、各水電解セル１６の陽極側からは酸素が生成し、該酸素は純水と気液混合物を形成して、気液取出口３から気液分離装置２に直接流入する。
【００２２】
このとき、前記気液混合物に含まれる純水は、水電解セルスタック１から気液取出口３を介して直接気液分離装置２に流入するので、温度の低下が殆どなく、水としての純度の低下も殆どない。
【００２３】
次に、前記気液混合物は、気液分離装置２内でステンレス網からなるフィルター５により酸素と純水とに分離される。そして、前記酸素は酸素放出口６から大気中に放出され、前記純水はフィルター５下方の気液分離装置２内に蓄えられる。尚、気液分離装置２内に蓄えられた純水７は、ここで純水取入口４から供給された未使用の純水と合流せしめられる。
【００２４】
次に、気液分離装置２内に蓄えられた純水７は、ポンプ８により気液分離装置２から取り出されて精製装置９に送られ、イオン交換樹脂により精製されることにより、未使用の純水と同等の純度を回復する。そして、精製装置９から水電解セルスタック１に供給され、再び電解に供される。
【００２５】
従って、本実施形態の水電解水素ガス製造装置によれば、水電解セルスタック１で生成した気液混合物から回収された純水を、容易かつ有効に再利用に供することができる。
【図面の簡単な説明】
【図１】 本発明の水電解水素ガス製造装置の説明的断面図。
【図２】 図１に示す水電解水素ガス製造装置の要部を拡大して示す説明的断面図。
【符号の説明】
１…水電解手段、 ２…気液分離手段、 ３…流入口、 ４…取入口、 ５…フィルター、 ８…還流手段、 ９…精製手段、 １１…電解質膜、 １２，１３…触媒層。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water electrolysis hydrogen gas production apparatus for producing hydrogen by electrolysis of water.
[0002]
[Prior art]
Conventionally, as a water electrolysis apparatus for producing hydrogen by electrolysis of water, a water electrolysis cell having a configuration in which a solid polymer electrolyte membrane is sandwiched between a pair of catalyst layers and a porous power feeder is laminated on each catalyst layer. What is provided with the water electrolysis cell stack which laminated | stacked two or more. In the water electrolysis apparatus, pure water heated to about 80 ° C. is supplied to the catalyst layer and the porous power supply body of each water electrolysis cell, and a voltage is applied to each porous power supply body. If it does in this way, electrolysis of water will occur like the following formula (1) on the anode side of each water electrolysis cell, oxygen and hydrogen ion will be generated, and electrons will be given to an electrode. The hydrogen ions permeate the solid polymer electrolyte membrane, move to the cathode side, and are given electrons from the electrode on the cathode side. As a result, hydrogen is generated as shown in the following equation (2) on the cathode side of each water electrolysis cell.
[0003]
2H 2 O → O 2 ↑ + 4H + + 4e - ··· (1)
2H + + 2e − → H 2 ↑ (2)
Therefore, in the water electrolysis apparatus, hydrogen generated on the cathode side of each water electrolysis cell is taken out and supplied to a predetermined application. The hydrogen is used as a fuel for a fuel cell, for example.
[0004]
On the other hand, in the water electrolysis apparatus, oxygen generated on the anode side of each water electrolysis cell is taken out as a gas-liquid mixture with pure water. At this time, since the pure water is expensive, it is separated and recovered from oxygen by a gas-liquid separator and used for reuse (for example, see Patent Document 1). In the conventional water electrolysis device, the gas-liquid separation device is provided independently of the water electrolysis cell stack, and is connected to the water electrolysis cell stack via a pipe.
[0005]
However, the conventional water electrolysis apparatus has a disadvantage that the purity of the recovered pure water is inevitably lowered as water and is difficult to reuse as it is.
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 8-260176
[Problems to be solved by the invention]
An object of this invention is to provide the water electrolysis hydrogen gas manufacturing apparatus which can eliminate such an inconvenience and can easily use the recovered pure water for reuse.
[0008]
[Means for Solving the Problems]
In order to achieve such an object, the water electrolysis hydrogen gas production apparatus of the present invention comprises a pair of catalyst layers and an electrolyte membrane sandwiched between both catalyst layers, and electrolyzes pure water supplied to the catalyst layers. the go and retrieve the hydrogen from one of the catalyst layers, gas-liquid from the other catalyst layer and the water electrolysis means for taking out the gas-liquid mixture of oxygen and pure water, oxygen and the pure water that has been removed from the water electrolysis means in water electrolysis hydrogen production apparatus and a gas-liquid separating means for separating the pure water from the mixture, a gas-liquid separating means, in contact with one side surface of the water electrolysis means, and the oxygen and pure water from the aqueous electrolysis means The gas-liquid mixture is directly connected to the outlet from which the gas-liquid mixture is taken out without a pipe , and the gas-liquid mixture flows directly into the gas-liquid separating means through the outlet and is separated by the gas-liquid separating means. Refluxing means for refluxing the purified water to the water electrolysis means. Characterized in that that.
[0009]
In the water electrolysis hydrogen gas production apparatus of the present invention, the gas-liquid separation means is directly connected to an outlet from which the gas-liquid mixture of oxygen and pure water is taken out from the water electrolysis means, and the gas-liquid mixture is taken out from the outlet. However, since it directly flows into the gas-liquid separation means, the gas-liquid separation means does not need to be connected to the water electrolysis means via a pipe. As a result, the pure water supplied to the water electrolysis means flows directly into the gas-liquid separation means as a gas-liquid mixture with oxygen after being subjected to electrolysis. As a result, a decrease in purity can be suppressed.
[0010]
Therefore, according to the water electrolysis hydrogen gas production apparatus of the present invention, the recovered pure water can be easily reused. In addition, according to the water electrolysis hydrogen gas production apparatus of the present invention, since the temperature drop of the recovered pure water is suppressed, it is not necessary to use a heating means such as a heater for heating the pure water, and energy efficiency is improved. Can be improved.
[0011]
The water electrolysis hydrogen gas production apparatus of the present invention further comprises a purification means for purifying pure water refluxed by the reflux means using an ion exchange resin, and the purified water purified by the purification means is returned to the water electrolysis means. It is preferable to make it. According to the water electrolysis hydrogen gas production apparatus of the present invention, the recovered pure water is suppressed from being reduced in purity as water as described above. Therefore, the recovered pure water may be purified using a simple means such as the ion exchange resin when the reflux means returns to the water electrolysis means, and the purity required for the electrolysis is reduced. It can be recovered easily. Moreover, the energy for newly manufacturing a pure water can be reduced by doing in this way. By providing the purification means adjacent to the water electrolysis means, it is possible to reduce the piping and suppress the decrease in the temperature of the recovered pure water and the purity of the water.
[0012]
Further, in the water electrolysis hydrogen gas production apparatus of the present invention, the gas-liquid separation means includes an intake for taking unused pure water supplied to the water electrolysis means into the gas-liquid separation means from the outside. preferable. In this way, unused pure water is supplied from the intake port to the gas-liquid separation unit, and merged with the recovered pure water in the gas-liquid separation unit and supplied to the water electrolysis unit. Is done. Therefore, the recovered pure water reflux means and the supply means for supplying unused pure water to the water electrolysis means are made common, and the apparatus configuration can be simplified.
[0013]
The gas-liquid separation means preferably includes a filter that separates oxygen and pure water. By providing the filter, the gas-liquid separation means can efficiently separate oxygen and pure water with a small volume. As the filter, for example, a stainless steel net can be used.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 is an explanatory cross-sectional view of the water electrolysis hydrogen gas production apparatus of the present embodiment, and FIG. 2 is an explanatory cross-sectional view showing an enlarged main part of the water electrolysis hydrogen gas production apparatus shown in FIG.
[0015]
As shown in FIG. 1, the water electrolysis hydrogen gas production apparatus of this embodiment is in contact with one side surface of the water electrolysis cell stack 1 and the water electrolysis cell stack 1, and is directly connected without piping. The apparatus 2 is provided. The gas-liquid separator 2 includes a gas-liquid outlet 3 between which the gas-liquid mixture of oxygen and pure water is taken out from the water electrolysis cell stack 1.
[0016]
The gas-liquid separator 2 includes a pure water intake 4 for taking in unused pure water, a filter 5 for separating the gas-liquid mixture into oxygen and pure water, and an oxygen release for releasing the separated oxygen into the atmosphere. An outlet 6 is provided. The filter 5 is made of a stainless mesh.
[0017]
The water electrolysis hydrogen gas production apparatus of the present embodiment further includes a pump 8 below the gas-liquid separator 2. The pump 8 returns the pure water 7 separated from the gas-liquid mixture to the water electrolysis cell stack 1 through a conduit 8 a provided along the bottom of the water electrolysis cell stack 1 and the gas-liquid separation device 2. . A purifier 9 for purifying pure water refluxed by the pump 8 with an ion exchange resin is interposed in the middle of the conduit 8 a and is provided adjacent to the water electrolysis cell stack 1.
[0018]
The water electrolysis cell stack 1 includes an oxygen outlet 3 and a hydrogen outlet 10 that extracts hydrogen purified by electrolysis. In the water electrolysis cell stack 1, as shown in FIG. 2, the solid polymer electrolyte membrane 11 is sandwiched between a pair of catalyst layers 12 and 13, and the porous power feeders 14 and 15 are further formed on the catalyst layers 12 and 13. A plurality of water electrolysis cells 16 are stacked via separators 17 that also serve as gas-liquid passages.
[0019]
In the water electrolysis cell 16, the catalyst layers 12 and 13 are made of, for example, a paste in which a predetermined amount of catalyst powder is dispersed in an electrolyte solution in which an electrolyte composed of the same component as the solid polymer electrolyte membrane 11 is dissolved. It is formed by screen printing on a tetrafluoroethylene sheet. Then, the catalyst layers 12 and 13 are transferred to the solid polymer electrolyte membrane 11 side by hot pressing with the solid polymer electrolyte membrane 11 sandwiched between the surfaces of the sheets on which the catalyst layers 12 and 13 are formed, The solid polymer electrolyte membrane 11 is joined.
[0020]
Next, the operation of the water electrolysis hydrogen gas production apparatus of the present embodiment will be described.
[0021]
In the water electrolysis hydrogen gas production apparatus of the present embodiment, first, unused pure water heated to about 80 ° C. is supplied from the pure water intake 4 of the gas-liquid separator 2, and is supplied via the purifier 9 by the pump 8. Is supplied to the water electrolysis cell stack 1 and electrolyzed. As a result, hydrogen is generated from the cathode side of each water electrolysis cell 16 constituting the water electrolysis cell stack 1 and taken out from the hydrogen outlet 10 of the water electrolysis cell stack 1. On the other hand, oxygen is generated from the anode side of each water electrolysis cell 16, and the oxygen forms a gas-liquid mixture with pure water and flows directly into the gas-liquid separator 2 from the gas-liquid outlet 3.
[0022]
At this time, the pure water contained in the gas-liquid mixture flows directly from the water electrolysis cell stack 1 into the gas-liquid separator 2 through the gas-liquid outlet 3, so that there is almost no decrease in temperature and the purity as water. There is almost no drop in the.
[0023]
Next, the gas-liquid mixture is separated into oxygen and pure water by the filter 5 made of stainless steel in the gas-liquid separator 2. Then, the oxygen is released into the atmosphere from the oxygen outlet 6, and the pure water is stored in the gas-liquid separator 2 below the filter 5. The pure water 7 stored in the gas-liquid separation device 2 is merged with unused pure water supplied from the pure water inlet 4 here.
[0024]
Next, the pure water 7 stored in the gas-liquid separator 2 is taken out from the gas-liquid separator 2 by the pump 8, sent to the purifier 9, and purified by an ion exchange resin. Restores the same purity as pure water. And it supplies to the water electrolysis cell stack 1 from the refiner | purifier 9, and uses for electrolysis again.
[0025]
Therefore, according to the water electrolysis hydrogen gas production apparatus of the present embodiment, the pure water recovered from the gas-liquid mixture generated in the water electrolysis cell stack 1 can be reused easily and effectively.
[Brief description of the drawings]
FIG. 1 is an explanatory sectional view of a water electrolysis hydrogen gas production apparatus of the present invention.
FIG. 2 is an explanatory cross-sectional view showing an enlarged main part of the water electrolysis hydrogen gas production apparatus shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Water electrolysis means, 2 ... Gas-liquid separation means, 3 ... Inflow port, 4 ... Intake port, 5 ... Filter, 8 ... Reflux means, 9 ... Purification means, 11 ... Electrolyte membrane, 12, 13 ... Catalyst layer.

Claims (5)

１対の触媒層と、両触媒層に挟持された電解質膜とを備え、該触媒層に供給された純水の電解を行って、一方の触媒層から水素を取り出し、他方の触媒層から酸素と純水との気液混合物を取り出す水電解手段と、該水電解手段から取り出された酸素と純水との気液混合物から純水を分離する気液分離手段とを備える水電解水素ガス製造装置において、
該気液分離手段を、該水電解手段の一側面に接して、該水電解手段から酸素と純水との気液混合物が取り出される取出口に配管を介することなく直接接続させて設け、該気液混合物は該取出口を介して該気液分離手段に直接流入すると共に、該気液分離手段により分離された純水を該水電解手段に還流させる還流手段とを備えることを特徴とする水電解水素ガス製造装置。Comprising a pair and a catalyst layer, and an electrolyte membrane sandwiched on both the catalyst layer, by performing the electrolysis of pure water supplied to the catalyst layer, removed hydrogen from one of the catalyst layer, oxygen from the other catalyst layer water electrolysis hydrogen production and a gas-liquid separating means for separating pure water from the gas-liquid mixture of the water electrolysis means for taking out the gas-liquid mixture, oxygen and pure water taken from the water electrolysis means of pure water and In the device
The gas-liquid separation means is provided in contact with one side surface of the water electrolysis means and directly connected to a take-out port from which the gas-liquid mixture of oxygen and pure water is taken out from the water electrolysis means without a pipe , The gas-liquid mixture directly flows into the gas-liquid separation means through the outlet, and includes a reflux means for refluxing pure water separated by the gas-liquid separation means to the water electrolysis means. Water electrolysis hydrogen gas production equipment. 前記還流手段により還流される純水をイオン交換樹脂により精製する精製手段を備え、該精製手段により精製された純水を前記水電解手段に還流させることを特徴とする請求項１記載の水電解水素ガス製造装置。2. The water electrolysis according to claim 1, further comprising a purification unit that purifies pure water refluxed by the reflux unit using an ion exchange resin, and the pure water purified by the purification unit is refluxed to the water electrolysis unit. Hydrogen gas production equipment. 前記精製手段は、前記水電解手段に隣接して備えられることを特徴とする請求項２記載の水電解水素ガス製造装置。3. The water electrolysis hydrogen gas production apparatus according to claim 2, wherein the purification means is provided adjacent to the water electrolysis means. 前記気液分離手段は、前記水電解手段に供給される未使用の純水を、外部から該気液分離手段に取り入れる取入口を備えることを特徴とする請求項１乃至請求項３のいずれか１項記載の水電解水素ガス製造装置。The said gas-liquid separation means is provided with the intake which takes in the unused pure water supplied to the said water electrolysis means to this gas-liquid separation means from the outside . The water electrolysis hydrogen gas production apparatus according to 1 above. 前記気液分離手段は、酸素と純水とを分離するフィルターを備えることを特徴とする請求項１乃至請求項４のいずれか１項記載の水電解水素ガス製造装置。The water-electrolytic hydrogen gas production apparatus according to any one of claims 1 to 4, wherein the gas-liquid separation means includes a filter that separates oxygen and pure water.
JP2002260886A 2002-09-06 2002-09-06 Water electrolysis hydrogen gas production equipment Expired - Fee Related JP4156884B2 (en)

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