Condensation reactor for octanol production

The utility model provides a condensation reactor for octanol production, which comprises a shell, a first-stage reaction section, a first-stage heat exchange section, a second-stage reaction section and a second-stage heat exchange section are sequentially arranged in the shell from bottom to top, a raw material inlet and a catalyst inlet are arranged below the first-stage reaction section, and the catalyst inlet is arranged below the second-stage heat exchange section. A product outlet is formed above the second-stage heat exchange section; wherein the first-stage reaction section and the second-stage reaction section respectively comprise a plurality of shell rings with fillers. The reaction section and the heat exchange section which are connected in a multi-stage manner are arranged, so that heat released by the n-butyraldehyde condensation reaction is removed in time, the temperature of a reaction system is controlled through direct contact heat exchange, side reaction aggravation caused by over-high te