PURPOSE: To make the wall of reaction tube and tube-plate thin, by separating an upper tube-plate from a reactor, combining a lower tube-plate with the reactor to cut off gas flow and to support tubes and then connecting an lower- end of center tube with a nozzle of water inlet.
CONSTITUTION: Unreacted gas to be raw gas is introduced to the outside of the reaction tube 1 from a gas inlet nozzle 12 provided on a drum above the lower tube-plate 5 and pre-heated by reaction heat generated in the tube while rising. Then said gas is introduced to a catalyst layer 3 in the reaction tube 1 through a gap between the upper tube-plate 4 and the drum or a gas passage 14 and flows down. The methanol synthesis is advanced while said gas flows down in the catalyst layer 3 and then the reaction product is recovered from the gas outlet nozzle 13 below the reaction tube 1. In the titled reactor, the reaction tube 1 and the lower tube-plate 5 are made to thin and lightweight, and the heat of reaction is effectively removed by unreacted gas and evaporating water in the center tube.
NAGAI HIDEAKI
YAMAMOTO MAKOTO
MAKIHARA HIROSHI
