| 摘要 |
PURPOSE: To provide a fuel reformer in which the geometrical positional relationship between each of reforming tubes and a solid wall that surrounds the tubes is uniformized in the circumferential direction of the tub, and also, the influence of solid radiation heat transfer is minimized, and further, the temp. drop of the combustion gas when a combustion gas flows once across one reforming tube and thereafter arrives at another reforming tube is reduced, and thereby, the combustion gas temp. at the combustion gas inlet port is uniformized. CONSTITUTION: In this reformer, reforming tubes packed with a reforming catalyst 14 are placed in a reforming vessel 1 and a combustion chamber 17 that is a space where a high temp. combustion gas is allowed to flow is formed above the reforming tubes in the vessel 1. Further, this reforming vessel 1 is provided with a sleeve 18 that is placed so as to surround the reforming tubes and used for forming a combustion gas passage and a heat insulating cap 19 that is placed on the tops of the reforming tubes. This insulating cap 19 is formed so that it extends downwardly from the upper end of the sleeve 18 and surrounds the sleeve 18. |
