JP2024045484A5 - Water electrolysis system, water electrolysis method and hydrogen production method - Google Patents
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 177
- 238000005868 electrolysis reaction Methods 0.000 title claims description 88
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims description 62
- 239000001257 hydrogen Substances 0.000 title claims description 53
- 229910052739 hydrogen Inorganic materials 0.000 title claims description 53
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 239000007788 liquid Substances 0.000 claims description 48
- 238000000926 separation method Methods 0.000 claims description 45
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 38
- 239000001301 oxygen Substances 0.000 claims description 38
- 229910052760 oxygen Inorganic materials 0.000 claims description 38
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 8
- 229910001882 dioxygen Inorganic materials 0.000 claims description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Description
本発明は、水電解システム、水電解方法及び水素製造方法に関するものである。 The present invention relates to a water electrolysis system , a water electrolysis method, and a hydrogen production method .
前記目的を達成するため、本発明は、供給される水を電気分解することにより水素と酸素を発生させる水電解装置を有する水電解システムであって、前記水電解装置に供給するための水および前記水電解装置で発生した酸素ガスが流れる酸素側系統と、前記水電解装置で発生した水素ガスが流れる水素側系統と、前記酸素側系統から前記水素側系統に水を移動させるための水移動手段と、を有し、
水電解運転の停止時に発生する前記水素側系統内の圧力低下に伴って、前記水移動手段により前記酸素側系統の水を前記水素側系統に移動させることで、前記水素側系統内の圧力低下を防止する、ことを特徴としている。
前記水移動手段は、前記酸素側系統から前記水素側系統にのみ水が流れ、前記水素側系統から前記酸素側系統には水が流れないように構成されていてもよい。
前記水移動手段は、前記酸素側系統と前記水素側系統とを接続し水が流れる流路を有し、前記流路には逆止弁が設けられていてもよい。
前記水移動手段は、前記酸素側系統と前記水素側系統とを接続し水が流れる流路を有し、水電解運転時には前記流路を閉鎖し、水電解運転停止時には前記流路を開放する弁が設けられていてもよい。
前記水素側系統には除湿器が設けられ、当該除湿器の上流側には、水電解運転の停止時に前記水移動手段により前記酸素側系統から水素側系統に移動してきた水の前記除湿器への流入を阻止する弁が設けられていてもよい。
前記酸素側系統には、酸素側気液分離タンクを有し、前記酸素側気液分離タンクには、当該酸素側気液分離タンク内の水位を検出するセンサが設けられ、当該センサによって所定の低い水位を検知した際には、エラーが発生したとみなされるように構成され、前記水電解システムの運転が停止した後、運転再開時には、一定時間、当該センサによって前記所定の低い水位を検知してもエラーが発生したとみなさないように構成してもよい。これによって水電解運転の停止時に前記水移動手段により水が前記酸素側系統から水素側系統に移動してきた結果として酸素側気液分離タンク内の水位が低下してもエラーとはみなされないようにしてもよい。
前記水素側系統には、水素側気液分離タンクを有し、前記水素側気液分離タンクには、当該水素側気液分離タンク内の水位を検出するセンサが設けられ、当該センサによって所定の高い水位を検知した際には、エラーが発生したとみなされるように構成され、前記水電解システムの運転が停止した後、運転再開時には、一定時間、当該センサによって前記所定の高い水位を検知してもエラーが発生したとみなさないように構成してもよい。これによって水電解運転の停止時に前記水移動手段により水が前記酸素側系統から水素側系統に移動してきた結果として水素側気液分離タンク内の水位が上昇してもエラーとはみなされないようにしてもよい。
その他、供給される水を電気分解することにより水素と酸素を発生させる水電解装置を用いた水電解方法であって、前記水電解装置に供給するための水および前記水電解装置で発生した酸素ガスが流れる酸素側系統と、前記水電解装置で発生した水素ガスが流れる水素側系統と、前記酸素側系統から前記水素側系統に水を移動させるための水移動手段と、を用意し、水電解運転の停止時に発生する前記水素側系統内の圧力低下に伴って、前記水移動手段により前記酸素側系統の水を前記水素側系統に移動させて、前記水素側系統内の圧力低下を防止する、水電解方法も提案できる。
さらにまた供給される水を電気分解することにより水素と酸素を発生させる水電解装置を用いて、水素を製造する方法であって、前記水電解装置に供給するための水および前記水電解装置で発生した酸素ガスが流れる酸素側系統と、前記水電解装置で発生した水素ガスが流れる水素側系統と、前記酸素側系統から前記水素側系統に水を移動させるための水移動手段と、を用意し、水電解運転の停止時に発生する前記水素側系統内の圧力低下に伴って、前記水移動手段により前記酸素側系統の水を前記水素側系統に移動させて、前記水素側系統内の圧力低下を防止する、ことを特徴とする、水素製造方法も提案できる。
In order to achieve the above-mentioned object, the present invention provides a water electrolysis system having a water electrolysis device that generates hydrogen and oxygen by electrolyzing supplied water , the water electrolysis system comprising : an oxygen side system through which water to be supplied to the water electrolysis device and oxygen gas generated by the water electrolysis device flow; a hydrogen side system through which hydrogen gas generated by the water electrolysis device flows; and water transferring means for transferring water from the oxygen side system to the hydrogen side system;
In response to a pressure drop in the hydrogen-side system that occurs when the water electrolysis operation is stopped, the water moving means moves water from the oxygen-side system to the hydrogen-side system, thereby preventing a pressure drop in the hydrogen-side system .
The water transfer means may be configured so that water flows only from the oxygen side system to the hydrogen side system, and so that water does not flow from the hydrogen side system to the oxygen side system.
The water transfer means may have a flow path connecting the oxygen side system and the hydrogen side system and through which water flows, and the flow path may be provided with a check valve.
The water transferring means may have a flow path connecting the oxygen side system and the hydrogen side system and through which water flows, and may be provided with a valve that closes the flow path during water electrolysis operation and opens the flow path when the water electrolysis operation is stopped.
A dehumidifier may be provided in the hydrogen-side system, and a valve may be provided upstream of the dehumidifier to prevent water, which has been moved from the oxygen-side system to the hydrogen-side system by the water moving means when the water electrolysis operation is stopped, from flowing into the dehumidifier.
The oxygen side system may have an oxygen-side gas-liquid separation tank, the oxygen-side gas-liquid separation tank may be provided with a sensor for detecting a water level in the oxygen-side gas-liquid separation tank, and when a predetermined low water level is detected by the sensor, an error may be deemed to have occurred, and when operation of the water electrolysis system is restarted after the operation of the water electrolysis system is stopped, an error may not be deemed to have occurred even if the predetermined low water level is detected by the sensor for a certain period of time. Thus, even if the water level in the oxygen-side gas-liquid separation tank drops as a result of water moving from the oxygen side system to the hydrogen side system by the water moving means when the water electrolysis operation is stopped, an error may not be deemed to have occurred.
The hydrogen-side system may have a hydrogen-side gas-liquid separation tank, the hydrogen-side gas-liquid separation tank may be provided with a sensor for detecting a water level in the hydrogen-side gas-liquid separation tank, and an error may be deemed to have occurred when a predetermined high water level is detected by the sensor, and when operation of the water electrolysis system is restarted after the operation of the water electrolysis system is stopped, an error may not be deemed to have occurred even if the predetermined high water level is detected by the sensor for a certain period of time. Thus, even if the water level in the hydrogen-side gas-liquid separation tank rises as a result of water moving from the oxygen-side system to the hydrogen-side system by the water moving means when the water electrolysis operation is stopped, an error may not be deemed to have occurred.
Another proposed water electrolysis method uses a water electrolysis device that generates hydrogen and oxygen by electrolyzing supplied water, and includes an oxygen side system through which water to be supplied to the water electrolysis device and oxygen gas generated by the water electrolysis device flow, a hydrogen side system through which hydrogen gas generated by the water electrolysis device flows, and water transferring means for transferring water from the oxygen side system to the hydrogen side system, and when a pressure drop occurs in the hydrogen side system when water electrolysis operation is stopped, the water transferring means transfers water from the oxygen side system to the hydrogen side system, thereby preventing a pressure drop in the hydrogen side system.
Furthermore, there can be proposed a method for producing hydrogen using a water electrolysis device that generates hydrogen and oxygen by electrolyzing supplied water, the method comprising: providing an oxygen side system through which water to be supplied to the water electrolysis device and oxygen gas generated by the water electrolysis device flow; a hydrogen side system through which hydrogen gas generated by the water electrolysis device flows; and water transferring means for transferring water from the oxygen side system to the hydrogen side system; and, in response to a pressure drop in the hydrogen side system that occurs when water electrolysis operation is stopped, the water transferring means transfers water from the oxygen side system to the hydrogen side system, thereby preventing a pressure drop in the hydrogen side system.
本発明によれば、水電解装置において、水電解運転を停止した後にクロスリークによって水素、酸素が消費されても水電解装置内が負圧になることを抑えて、安全性を確保して電極の劣化や破損のリスクを防止することができる。 According to the present invention, in a water electrolysis apparatus, even if hydrogen and oxygen are consumed due to cross leakage after the water electrolysis operation is stopped, it is possible to prevent the pressure inside the water electrolysis apparatus from becoming negative, thereby ensuring safety and preventing the risk of deterioration and damage to the electrodes.
以上のことから、図４に示した水電解システム１の運転停止時のフローチャートの左側に示したフローチャートにしたがって、制御装置Ｃの制御フローを、例えば直流電源２を停止してから一定時間は液面センサ３１、４３に基づくエラー判断を猶予する設定に制御フローを変更し、その後一定時間経過したら、主電源をＯＦＦにするようにしてもよい。また運転再開時も、ステップＳ４になってから一定時間経過するまでは、液面センサ３１、４３に基づくエラー判断を猶予する制御フローとし、一定時間経過後、液面センサ３１、４３に基づくエラー判断を通常の設定に戻すように制御装置Ｃの制御フローをプログラムするようにしてもよい。 In view of the above, the control flow of the control device C may be changed to a setting that postpones error determination based on the liquid level sensors 31, 43 for a certain period of time after the DC power supply 2 is stopped, and the main power supply may be turned off after the certain period of time has elapsed, in accordance with the flowchart shown on the left side of the flowchart for when the water electrolysis system 1 is stopped in Fig. 4. Furthermore, when the operation is restarted, the control flow may also be programmed to postpone error determination based on the liquid level sensors 31, 43 until a certain period of time has elapsed after step S4, and to return the error determination based on the liquid level sensors 31, 43 to the normal setting after the certain period of time has elapsed.
下記の（１）～（７）に挙げた技術内容も本開示で提案される。
（１）固体高分子電解質膜を有する水電解セルを用いた水電解装置を有する水電解システムであって、
前記水電解装置に直流電力を供給する電源装置と、
前記水電解装置に原料水を供給する原料水供給路と、
前記水電解装置で発生した水素ガスを、水素側気液分離タンクを経由して前記水電解装置外に放出する水素ガス放出路と、
前記水電解装置で発生した酸素ガスを、酸素側気液分離タンクを経由して前記水電解装置外に放出する酸素ガス放出路と、
を有し、
前記酸素側気液分離タンクと前記水素側気液分離タンクとは圧力調整流路で接続され、
当該圧力調整流路は、前記酸素側気液分離タンクからの水のみが前記水素側気液分離タンクに流れるように構成されていることを特徴とする、水電解システム。
かかる水電解システムによれば、酸素側気液分離タンクと水素側気液分離タンクとは圧力調整流路で接続され、当該圧力調整流路は、酸素側気液分離タンクからの流体のみが水素側気液分離タンクに流れるように構成されているので、電源装置をＯＦＦした後、前記水電解装置に残留している水素と酸素が反応して、少なくとも水電解装置内の水素側の圧力が低下しようとしても、圧力調整流路を経由して酸素側気液分離タンクからの水が水素側気液分離タンクに流れるので、水素側の圧力低下を防止することができる。また酸素側については、通常この種の水電解装置では、酸素側気液分離タンク並びにその系統は、大気系に開放されているか、あるいはよりも十分容積が大きいものである。例えば水電解システムの大きさにも拠るが、一般的に水素側気液分離タンク並びにその系統の容積が、例えば０．１Ｌに対して、酸素側気液分離タンク並びにその系統は２Ｌ～３Ｌ程度の大きさを有している。したがって大気系に開放している場合には負圧になることはなく、また十分容積が大きい場合には、大気圧に対して圧力差が大きくなりすぎることはない。
（２）前記圧力調整流路には、逆止弁が設けられていることを特徴とする、上記（１）に記載の水電解システム
このように前記圧力調整流路に逆止弁を設けることで、極めて容易にそのような圧力調整を実現することができる。
（３）前記酸素側気液分離タンクは、前記水素側気液分離タンクの系統が満水になっても、渇水しない水量を保有していることを特徴とする、上記（１）または（２）のいずれか一つに記載の水電解システム。
酸素側気液分離タンクは、水素側気液分離タンクの系統が満水になっても、渇水しない水量を保有しているように構成することで、水素側の圧力低下した場合常に酸素側気液分離タンクから水素側気液分離タンクの系統に水を供給することができる。
（４）前記圧力調整流路には、前記電源装置がＯＮの時には、前記圧力調整流路を閉鎖し、前記電源装置がＯＦＦの時には前記圧力調整流路を開放する弁が設けられていることを特徴とする、上記（１）～（３）のいずれか一つに記載の水電解システム。
これによって、電源装置がＯＮの時に酸素側気液分離タンクと水素側気液分離タンクとが連通することを確実に防止できる。また逆止弁を設けた場合に、逆止弁が機能不良を起こした際のフェイルセーフともなる。
（５）前記水素ガス放出路には除湿器が設けられ、当該除湿器の上流側には、前記電源装置がＯＦＦの時に前記除湿器への流体の流入を阻止する弁が設けられていることを特徴とする、上記（１）～（４）のいずれか一つに記載の水電解システム。
これによって、不意に除湿器に水が流入して除湿器が機能不全になることを防止できる。
（６）前記酸素側気液分離タンクには、当該酸素側気液分離タンク内の水位を検出するセンサが設けられ、
当該センサによって所定の低い水位を検知した際には、エラーが発生したとみなされるように構成され、
前記電源装置がＯＦＦになって前記水電解システムの運転が停止した後、運転再開時には、一定時間、当該センサによって前記所定の低い水位を検知してもエラーが発生したとみなさないように構成されたことを特徴とする、上記（１）～（５）のいずれか一つに記載の水電解システム。
これによって圧力調整を正常に行っている結果として酸素側気液分離タンク内の水位が低下しても、エラーとはみなされず、水電解システムの運転再開を適切に実行することができる。
（７）前記水素側気液分離タンクには、当該水素側気液分離タンク内の水位を検出するセンサが設けられ、
当該センサによって所定の高い水位を検知した際には、エラーが発生したとみなされるように構成され、
前記電源装置がＯＦＦになって前記水電解システムの運転が停止した後、運転再開時には、一定時間、当該センサによって前記所定の高い水位を検知してもエラーが発生したとみなさないように構成されたことを特徴とする、上記（１）～（６）のいずれか一つに記載の水電解システム。
これによって圧力調整を正常に行っている結果として水素側気液分離タンク内の水位が上昇しても、エラーとはみなされず、水電解システムの運転再開を適切に実行することができる。
The technical contents listed in (1) to (7) below are also proposed in this disclosure.
(1) A water electrolysis system including a water electrolysis device using a water electrolysis cell having a solid polymer electrolyte membrane,
a power supply device for supplying DC power to the water electrolysis device;
a raw water supply channel for supplying raw water to the water electrolysis device;
a hydrogen gas release path that releases hydrogen gas generated in the water electrolysis apparatus to the outside of the water electrolysis apparatus via a hydrogen-side gas-liquid separation tank;
an oxygen gas release passage through which oxygen gas generated in the water electrolysis apparatus is released to the outside of the water electrolysis apparatus via an oxygen-side gas-liquid separation tank;
having
the oxygen-side gas-liquid separation tank and the hydrogen-side gas-liquid separation tank are connected by a pressure adjustment passage;
the pressure adjustment flow path is configured so that only water from the oxygen-side gas-liquid separation tank flows into the hydrogen-side gas-liquid separation tank.
According to this water electrolysis system, the oxygen-side gas-liquid separation tank and the hydrogen-side gas-liquid separation tank are connected by a pressure adjustment flow path, and the pressure adjustment flow path is configured so that only the fluid from the oxygen-side gas-liquid separation tank flows to the hydrogen-side gas-liquid separation tank. Therefore, even if hydrogen and oxygen remaining in the water electrolysis device react with each other after the power supply device is turned off, and the pressure on at least the hydrogen side in the water electrolysis device is about to drop, water from the oxygen-side gas-liquid separation tank flows to the hydrogen-side gas-liquid separation tank via the pressure adjustment flow path, so that the pressure drop on the hydrogen side can be prevented. Regarding the oxygen side, in this type of water electrolysis device, the oxygen-side gas-liquid separation tank and its system are usually open to the atmospheric system or have a volume sufficiently larger than that of the oxygen-side gas-liquid separation tank. For example, depending on the size of the water electrolysis system, the volume of the hydrogen-side gas-liquid separation tank and its system is generally about 2 L to 3 L, while that of the hydrogen-side gas-liquid separation tank and its system is, for example, 0.1 L. Therefore, when it is open to the atmospheric system, negative pressure does not occur, and when the volume is sufficiently large, the pressure difference with respect to atmospheric pressure does not become too large.
(2) The water electrolysis system according to (1) above, wherein the pressure adjustment passage is provided with a check valve.
By providing a check valve in the pressure adjustment flow passage in this manner, such pressure adjustment can be achieved extremely easily.
(3) The water electrolysis system according to any one of (1) or (2) above, wherein the oxygen-side gas-liquid separation tank has a water volume sufficient to prevent water from running out even when a system of the hydrogen-side gas-liquid separation tank is filled up with water.
The oxygen-side gas-liquid separation tank is configured to hold a volume of water that will not cause the hydrogen-side gas-liquid separation tank system to run out, even if the hydrogen-side gas-liquid separation tank system becomes full. This makes it possible to constantly supply water from the oxygen-side gas-liquid separation tank to the hydrogen-side gas-liquid separation tank system if pressure on the hydrogen side drops.
(4) The water electrolysis system according to any one of (1) to (3), wherein the pressure adjustment flow path is provided with a valve that closes the pressure adjustment flow path when the power supply device is ON and opens the pressure adjustment flow path when the power supply device is OFF.
This reliably prevents communication between the oxygen-side gas-liquid separation tank and the hydrogen-side gas-liquid separation tank when the power supply is on. In addition, if a check valve is provided, this also serves as a fail-safe in case the check valve malfunctions.
(5) The water electrolysis system according to any one of (1) to (4), wherein a dehumidifier is provided in the hydrogen gas release path, and a valve is provided upstream of the dehumidifier to prevent a fluid from flowing into the dehumidifier when the power supply device is turned off.
This prevents water from accidentally entering the dehumidifier and causing the dehumidifier to malfunction.
(6) The oxygen-side gas-liquid separation tank is provided with a sensor for detecting a water level in the oxygen-side gas-liquid separation tank,
When the sensor detects a predetermined low water level, an error is deemed to have occurred;
The water electrolysis system according to any one of (1) to (5) above, wherein when the power supply device is turned off and operation of the water electrolysis system is stopped, and then operation is restarted, even if the sensor detects the predetermined low water level for a certain period of time, it is not considered that an error has occurred.
As a result, even if the water level in the oxygen-side gas-liquid separation tank drops as a result of normal pressure adjustment, this is not regarded as an error, and the operation of the water electrolysis system can be appropriately restarted.
(7) The hydrogen-side gas-liquid separation tank is provided with a sensor for detecting a water level in the hydrogen-side gas-liquid separation tank,
When the sensor detects a predetermined high water level, it is determined that an error has occurred.
The water electrolysis system according to any one of (1) to (6) above, wherein when the power supply device is turned off and operation of the water electrolysis system is stopped, and then operation is restarted, even if the sensor detects the specified high water level for a certain period of time, it is not considered that an error has occurred.
As a result, even if the water level in the hydrogen-side gas-liquid separation tank rises as a result of normal pressure adjustment, this is not regarded as an error, and the operation of the water electrolysis system can be appropriately restarted.
Claims (9)
前記水電解装置に供給するための水および前記水電解装置で発生した酸素ガスが流れる酸素側系統と、
前記水電解装置で発生した水素ガスが流れる水素側系統と、
前記酸素側系統から前記水素側系統に水を移動させるための水移動手段と、
を有し、
水電解運転の停止時に発生する前記水素側系統内の圧力低下に伴って、前記水移動手段により前記酸素側系統の水を前記水素側系統に移動させることで、前記水素側系統内の圧力低下を防止する、
ことを特徴とする、水電解システム。 A water electrolysis system having a water electrolysis device that generates hydrogen and oxygen by electrolyzing supplied water ,
an oxygen side system through which water to be supplied to the water electrolysis apparatus and oxygen gas generated in the water electrolysis apparatus flow;
a hydrogen side system through which hydrogen gas generated in the water electrolysis apparatus flows;
a water transfer means for transferring water from the oxygen side system to the hydrogen side system;
having
When a pressure drop occurs in the hydrogen-side system when the water electrolysis operation is stopped, the water moving means moves water from the oxygen-side system to the hydrogen-side system, thereby preventing a pressure drop in the hydrogen-side system.
A water electrolysis system comprising:
前記酸素側系統から前記水素側系統にのみ水が流れ、前記水素側系統から前記酸素側系統には水が流れないように構成されていることを特徴とする、The invention is characterized in that water flows only from the oxygen side system to the hydrogen side system, and water does not flow from the hydrogen side system to the oxygen side system.
請求項１に記載の水電解システム。The water electrolysis system according to claim 1 .
前記酸素側系統と前記水素側系統とを接続し水が流れる流路を有し、a flow path connecting the oxygen side system and the hydrogen side system and through which water flows;
前記流路には逆止弁が設けられていることを特徴とする、The flow path is provided with a check valve.
請求項１または２のいずれか一項に記載の水電解システム。The water electrolysis system according to claim 1 or 2.
前記酸素側系統と前記水素側系統とを接続し水が流れる流路を有し、a flow path connecting the oxygen side system and the hydrogen side system and through which water flows;
水電解運転時には前記流路を閉鎖し、水電解運転停止時には前記流路を開放する弁が設けられていることを特徴とする、a valve is provided which closes the flow path during a water electrolysis operation and opens the flow path when the water electrolysis operation is stopped.
請求項１～３のいずれか一項に記載の水電解システム。The water electrolysis system according to any one of claims 1 to 3.
ことを特徴とする、請求項１～４のいずれか一項に記載の水電解システム。The water electrolysis system according to any one of claims 1 to 4.
前記酸素側気液分離タンクには、当該酸素側気液分離タンク内の水位を検出するセンサが設けられ、The oxygen-side gas-liquid separation tank is provided with a sensor for detecting a water level in the oxygen-side gas-liquid separation tank,
当該センサによって所定の低い水位を検知した際には、エラーが発生したとみなされるように構成され、When the sensor detects a predetermined low water level, an error is deemed to have occurred;
前記水電解システムの運転が停止した後、運転再開時には、一定時間、当該センサによって前記所定の低い水位を検知してもエラーが発生したとみなさないように構成されたことを特徴とする、請求項１～５のいずれか一項に記載の水電解システム。The water electrolysis system according to any one of claims 1 to 5, wherein, when operation of the water electrolysis system is stopped and then restarted, even if the sensor detects the predetermined low water level for a certain period of time, it is not determined that an error has occurred.
前記水素側気液分離タンクには、当該水素側気液分離タンク内の水位を検出するセンサが設けられ、the hydrogen-side gas-liquid separation tank is provided with a sensor for detecting a water level in the hydrogen-side gas-liquid separation tank,
当該センサによって所定の高い水位を検知した際には、エラーが発生したとみなされるように構成され、When the sensor detects a predetermined high water level, it is determined that an error has occurred.
前記水電解システムの運転が停止した後、運転再開時には、一定時間、当該センサによって前記所定の高い水位を検知してもエラーが発生したとみなさないように構成されたことを特徴とする、請求項１～６のいずれか一項に記載の水電解システム。The water electrolysis system according to any one of claims 1 to 6, wherein, when operation of the water electrolysis system is stopped and then restarted, even if the sensor detects the predetermined high water level for a certain period of time, it is not determined that an error has occurred.
前記水電解装置に供給するための水および前記水電解装置で発生した酸素ガスが流れる酸素側系統と、an oxygen side system through which water to be supplied to the water electrolysis apparatus and oxygen gas generated in the water electrolysis apparatus flow;
前記水電解装置で発生した水素ガスが流れる水素側系統と、a hydrogen side system through which hydrogen gas generated in the water electrolysis apparatus flows;
前記酸素側系統から前記水素側系統に水を移動させるための水移動手段と、a water transfer means for transferring water from the oxygen side system to the hydrogen side system;
を用意し、Prepare
水電解運転の停止時に発生する前記水素側系統内の圧力低下に伴って、前記水移動手段により前記酸素側系統の水を前記水素側系統に移動させて、前記水素側系統内の圧力低下を防止する、水電解方法。the water transferring means transfers water from the oxygen side system to the hydrogen side system in response to a pressure drop in the hydrogen side system that occurs when a water electrolysis operation is stopped, thereby preventing a pressure drop in the hydrogen side system.
前記水電解装置に供給するための水および前記水電解装置で発生した酸素ガスが流れる酸素側系統と、an oxygen side system through which water to be supplied to the water electrolysis apparatus and oxygen gas generated in the water electrolysis apparatus flow;
前記水電解装置で発生した水素ガスが流れる水素側系統と、a hydrogen side system through which hydrogen gas generated in the water electrolysis apparatus flows;
前記酸素側系統から前記水素側系統に水を移動させるための水移動手段と、a water transfer means for transferring water from the oxygen side system to the hydrogen side system;
を用意し、Prepare
水電解運転の停止時に発生する前記水素側系統内の圧力低下に伴って、前記水移動手段により前記酸素側系統の水を前記水素側系統に移動させて、前記水素側系統内の圧力低下を防止する、the water moving means moves water from the oxygen side system to the hydrogen side system in response to a pressure drop in the hydrogen side system that occurs when the water electrolysis operation is stopped, thereby preventing a pressure drop in the hydrogen side system.
ことを特徴とする、水素製造方法。A method for producing hydrogen.
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