| 摘要 |
PURPOSE:To enlarge the allowable range of space velocity in a contact catalystic reaction by flowing a gas from the upper position to the downward through catalyst layer to carry out exothermic reaction and by bringing the outer periphery of a reaction pipe and the inner periphery of a center pipe into contact with pressurized water of saturated temperature. CONSTITUTION:The water flowing upward through the center pipe 2 from a water room 4 is heated to generate water vapor by the heat which is generated by the contact catalystic reaction carried out in the outside periphery of the center pipe and transfered through the pipe wall, and flowed out in a mixed flow of water and vapor from a nozzle 6 of the top end of the center pipe 2. the outer periphery of the reaction pipe 1 is also brought into contact with water, and the vapor is generated by the reaction heat transfered through the pipe wall of the reaction pipe 1. This reaction pipe 1 has a high heat transfer coefficient and the generated heat is changed to the latent heat of evaporation and the temp. is kept constant thereby, and the temp. difference DELTAT between the reaction temp. of catalyst layer and the fluid temp. of the center pipe id kept in a specific condition. |
