| 摘要 |
PURPOSE:To improve the uniform heat transfer of catalyst pipes and the response velocity for the variation of load to be efficiently allowed to reform in the fluidized bed type reforming furnace in which hydrocarbon fuel is changed into the gas the main component of which is hydrogen by disposing catalyst pipes in the specified arrangement. CONSTITUTION:Air and hydrocarbon fuel, such as city gas, preheated by a preheater 19 are supplied to a gas burner 16, and the gas fuel is burnt in a combustion chamber and the burnt gas is introduced from nozzles 40 to a fluidizing chamber 17. By this introduction of gas, the fluidizing and medium filled in the fluidizing chamber 17 is fluidized and heated to form a fluidized bed F, which uniformly heats the catalyst pipes 18. Plural pipes 18 are provided respectively in vertical direction and horizontal direction keeping horizontal state in the fluidizing chamber 17, and consequently, the number of the catalyst pipes 18 which are buried in the fluidized bed is increased or decreased according to the height caused by the variation of the load of the reforming furnace, and the fluctuation width of temp. of the fluidized bed F is reduced. Moreover, spiral body 70 is provided in the catalyst pipe 18 so that city gas and steam are flowed in a spiral flow in the catalyst layer 60 densely filled with catalyst, and reforming is efficiently carried out. |
