| 摘要 |
<P>PROBLEM TO BE SOLVED: To realize a hydrogen producing unit which prevents deterioration of a catalyst by preventing temperature rise of the CO conversion part and CO removal part at the time of operation stop, and can lower in short time the temperature of reforming part with small purge gas amount, and has an efficient system with better operation response. <P>SOLUTION: This is the hydrogen producing unit in which a reforming part 1, a CO conversion part 6, and a CO removal part 7 are connected in the order and gas flowing-in parts 9, 10 are constituted at the CO conversion part 6 or the CO removal part 7, and at the operation stop, a purge gas is supplied from these gas flowing-in parts 9, 10. Then, the CO conversion part 6 and the CO removal can be purged by mixing with a gas that does not pass through the high temperature reforming part 1. Thereby, the catalyst at the CO conversion part 6 and the CO removal part 7 is prevented from deterioration, and with a small amount of purge gas and in a short time, the temperature of the reforming part can be lowered and the system has better operation response to load and becomes efficient. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
