| 摘要 |
PROBLEM TO BE SOLVED: To provide a water electrolysis device and an operation method thereof for maintaining a moist state without exposing an electrolytic membrane in gas and adequately maintaining water quality even when the device is fully stopped. SOLUTION: An electrolytic cell outlet side piping system which has control valves (24 and 25) to close circulation of pure water when a pump is stopped between inlet manifolds (101a and 101b) and water discharge sides of pumps (5 and 6) and which connects an anode chamber and a cathode chamber to vapor-liquid separators (13 and 14) comprises: outlet manifolds (102a and 102b) provided adjacent to and above electrolytic membranes (100a and 100b); and electrolytic cell outlet pipes (11 and 12) connected to the upper side portions of the vapor-liquid separators from the upper portions of the outlet manifolds. The volume of the electrolytic cell outlet side piping system from the upper ends of the electrolytic membranes to the highest point (the position F) of the electrolytic cell outlet side piping system is not less than the preliminarily calculated volume of the gas including the gas generated during the electrolytic operation in a water electrolysis cell 1 and the gas generated in the system from the upper ends of the electrolytic membranes to the highest position (the position F) of the electrolytic cell outlet side piping system. COPYRIGHT: (C)2004,JPO
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