| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technique which shortens the shutdown time of a fuel battery system and makes it less likely to oxidize a catalyst in a reformer, at an operation shutdown, and to provide a fuel electrode for fuel battery cell. <P>SOLUTION: An amount of supply of a hydrocarbon gas supplied via a hydrocarbon line 12 is reduced, while an oxidizer gas is continuously supplied to a power generating stack 10 via an oxidant line 14 at the time of the operation shutdown and air only is supplied to a heating burner 30, and a mixed gas, where the molar ratio of steam content/carbon content of a hydrocarbon gas and steam is 2-4 is supplied to the power generating stack 10 through the reformer 40. When the temperature of the reformer 40, obtained from a reformer temperature sensor 42, lowers to 200-550°C, supplying of the hydrocarbon gas is stopped. Furthermore, while supplying steam continuously, supplying of water is stopped, at a stage where the temperature of a vaporizer 50, obtained from a vaporizer temperature sensor 52, reaches 100°C, after a fixed quantity of water is supplied to and stored in the vaporizer 50. <P>COPYRIGHT: (C)2010,JPO&INPIT |
