| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the phenomenon that, upon the stop of a reforming system, a closed system including a reforming means reaches a negative pressure region, and to protect the system. <P>SOLUTION: When the reforming system is stopped, at first, the feed of air for oxidation to a reforming means 1 is stopped, thereafter, the feed of a gaseous starting material is stopped, further, the feed of fuel to a water vapor generating means 30 is stopped, then, the gaseous starting material remaining in the reforming means 1 is purged with water vapor generated by the residual heat in the water vapor generating means 30, further, when the inside of the reforming means 1 reaches a negative pressure region or approaches a negative pressure region by the phenomenon that the water vapor at least present in a CO reducing means 17 and piping 16 communicated therefrom to the reforming means 1 is condensed by the reduction of temperature, a prescribed amount of water is fed to the reforming means 1, and the water is heated and evaporated by heat in the water vapor reforming means 1, thus the phenomenon that the inside of the reforming means 1 reaches a negative pressure state is prevented, and the system is protected. <P>COPYRIGHT: (C)2008,JPO&INPIT |
