Environment-friendly condensation reflux device

The utility model discloses an environment-friendly condensation reflux device which comprises an arch-bottom N-shaped pipe, a flat-bottom U-shaped pipe and a condensation cylinder, wherein the lowerend of the arch bottom N-shaped pipe left pipe leg is connected to the top of the reaction kettle, the lower end of the arch bottom N-shaped pipe right pipe leg is connected with the upper end of theflat bottom U-shaped pipe left pipe leg, the upper end of the flat bottom U-shaped pipe right pipe leg is connected with a lower end inlet of the condensing cylinder, and the bottom of the flat bottomU-shaped pipe is provided with a liquid collecting tank. The environment-friendly condensation reflux device is provided with the pre-cooled flat-bottom U-shaped pipe, the condensation efficiency isimproved, condensed liquid can automatically scour crystallized solids on the inner wall of the condensation pipe through the obliquely-installed condensation cylinder, and therefore the condensationpipe is not prone to being bl