Distillation tail-gas absorbing device

The utility model discloses a distillation tail-gas absorbing device. The distillation tail-gas absorbing device comprises a tail-gas absorbing tank and a buffer tank, wherein inlets of the tail-gas absorbing tank and the buffer tank are respectively provided with inlet pipes extending into the bottoms of tank bodies of the tail-gas absorbing tank and the buffer tank; an outlet of the tail-gas absorbing tank is communicated with the inlet of the buffer tank; and the lower part of the tail-gas absorbing tank is provided with a sampling pipe. The distillation tail-gas absorbing device disclosed by the utility model has the advantages that the corrosion and impact of acid gas on moving parts of a vacuum unit is reduced, the service life of the vacuum unit is prolonged, the repairing and maintenance of the vacuum unit are reduced, the replacement frequency of vacuum grease in the vacuum unit is reduced, the replacement cost of the vacuum grease is saved, the whole utilization ratio of vacuum equipment is increase