| 摘要 |
PURPOSE:To uniformize the heat transfer quantity, to reduce the temp. difference in the temp. distribution, and to reduce the starting time by providing a heat-transfer promoting means on the side surface of a reactor packed with a reforming catalyst in contact with a heating medium. CONSTITUTION:The combustion gas flows on the inner and outer surfaces of reaction tubes 12, 12a-12c in direction of the arrow 21 along the side surfaces of the reaction tubes 12, 12a-12c. Fins 20 are set so that the number of fins is increased from the upstream side toward the downstream side, and the heating area is progressively increased from the upstream side toward the downstream side. A fuel is then supplied to a burner 3 from a supply pipe 5, and burned. The combustion gas is allowed to flow down in a partition wall 4 to heat a superheating tube 6, reversed at the lower end of the partition wall 4, and allowed to flow upward along the side surfaces of the reaction tubes 12, 12a-12c in a heating chamber 9 to heat the reaction tubes 12, 12a-12c from the inner and outer side surfaces. A part of the combustion gas is discharged from a discharge pipe 16 through a communicating hole 15. The raw gas to be reformed is then supplied to the superheating tube 6 from an inlet pipe 7, heated, supplied to the reaction tubes 12, 12a-12c through a distribution pipe 8, brought into contact with the reforming catalyst 11, reformed to a hydrogen-rich gas, and discharged from an outlet pipe 13a through a manifold 13. |
