| 摘要 |
PROBLEM TO BE SOLVED: To carry out efficient water electrolysis treatment capable of surely removing hydrogen remaining in an anode side when an operation is stopped with a simple structure and process. SOLUTION: The water electrolysis system 10 includes: a water electrolyzer 14 for producing high pressure hydrogen by the electrolysis of pure water; a water circulation device 14 for circulating the pure water to the water electrolyzer 12; a gas-liquid separation device 16 for separating oxygen and the high pressure hydrogen discharged from the water electrolyzer 12 from the water in the water circulation device 14; and the water circulation device 14 for circulating the water stored in the gas-liquid separation device 12. In the water circulation device 14, a solenoid valve 82 is arranged in a return pipe 80 for connecting a discharge port of the water electrolyzer 12 and the gas-liquid separation device 16 and a hydrogen exhaust pipe 84 extending upward from the water electrolyzer 12 is connected between the discharge port and the solenoid valve 82. COPYRIGHT: (C)2011,JPO&INPIT
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