FUEL REFORMING SYSTEM

PROBLEM TO BE SOLVED: To provide a fuel reforming system having a mechanism for preventing clogging of the gas flow caused by the condensation of water vapor contained in the reformed gas, in a system supplying hydrogen gas required for hydrodesulfurization by recycling the reformed gas. SOLUTION: By arranging a return gas pipeline of the system supplying hydrogen gas by recycling the reformed gas to receive exhaust heat from at least one reactor selected from the group consisting of a desulfurizer, a reformer, a CO converter, and a CO selective oxidizer, the temperature of the reformed recycling gas in the return gas pipeline is prevented from being lowered to a dew point or below. Preferably, the flow path of the reformed recycling gas flowing through the return gas pipeline is arranged at least not to be up-gradient toward a horizontal direction, so as to move water drain present in the return gas pipeline along a flow of the gas with the aid of gravity and discharge from the return gas pipeline. COPYRIGHT: (C)2006,JPO&NCIPI