Solvent desorption system of butadiene device

The utility model discloses a solvent desorption system of a butadiene device. The solvent desorption system comprises a solvent desorption tower, a first desorption tower reboiler, a second desorption tower reboiler, an intermediate reboiler, an alkyne removal tower and an alkyne extractive distillation tower, the solvent desorption tower is used for receiving a rich solvent pumped from a tower kettle of the butadiene extractive distillation tower; the intermediate reboiler is used for providing a heat source for the butadiene extractive distillation tower; a C4 alkyne enrichment area is arranged at the lower part of the solvent desorption tower, a pipeline I is connected to the C4 alkyne enrichment area, the solvent desorption tower is communicated with an intermediate reboiler through the pipeline I, and the intermediate reboiler is communicated with an alkyne removal tower; the solvent desorption system of the butadiene device provided by the utility model effectively solves the problems of coking, blocka