| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a solid oxide fuel cell system with its maintenance cost reduced and a system structure simplified. <P>SOLUTION: The solid oxide fuel cell system is provided with a desulfurizer 6 for removing sulfur components in fuel gas, a humidifier 8 humidifying the fuel gas, an fuel reformer 10 reforming the humidified fuel gas with vapor, a solid oxide fuel cell 4 generating power through fuel cell power generation reaction with the reformed gas as fuel, and a carbon dioxide gas mixing means for mixing carbon dioxide gas in the fuel gas at an upstream side of the humidifier. The carbon dioxide gas mixing means is constituted of a reformed gas recycling flow channel 53, in which, part of the reformed gas reformed at the fuel reformer 10 is recycled to an upstream side of a booster 28 through the reformed gas recycling flow channel 53, and part of the reformed gas containing carbon dioxide gas is mixed in the fuel gas, whereby, deposition of calcium components in the humidifier 8 can be restrained. <P>COPYRIGHT: (C)2007,JPO&INPIT |
