| 摘要 |
PURPOSE:To improve heat exchange efficiency and to suppress the pressure drop of a reaction fluid side and/or combustion gas side as far as possible so as to reduce required driving power for press feeding by providing a heat recovering means which projects from the inside surface on the inside surface of an inner cylindrical pipe. CONSTITUTION:The other end of the outer cylindrical pipe 9 of the concentrical double cylindrical pipe-shaped reaction apparatus 1 having an inlet 5 and outlet 23 for reaction fluid on the same one end is closed and the other end side, except a part of one end side is projected into a heating chamber. The reaction fluid is passed from the inlet 5 through the annular space which is delineated and formed of the outer cylindrical pipe 9 and the inner cylindrical pipe 11 and is packed with a catalyst; thereafter, the fluid is turned over at the other end and is then passed through the inside space of the inner cylindrical pipe 11 so as to be introduced to the outlet 23. The gas which is a heating source is passed on the outside of the outer cylindrical pipe 9 from the other end side to the one end side. Further, the heat recovering means 19 which projects from the inside surface is provided on the inside surface of the inner cylindrical pipe 11. The heat recovering efficiency is improved with this apparatus by using this apparatus for the endothermic reaction, such as steam reforming reaction of hydrocarbon. |
