PBT (polybutylene terephthalate) copolyester esterification reaction device

The utility model discloses a PBT (polybutylene terephthalate) copolyester esterification reaction device, which relates to the esterification reaction device field, and comprises a reaction kettle body and a reaction kettle top arranged at the top end of the reaction kettle body, a stirring device is arranged in the reaction kettle body, the stirring device comprises a stirring shaft, the peripheral side of the stirring shaft is fixedly connected with a plurality of stirring plates, and the stirring plates are arranged on the stirring shaft. A sliding plate is arranged on the lower surface of the stirring plate, one end of the sliding plate extends into the stirring plate and is in sliding connection with the stirring plate, a spring is arranged at the end, extending into the stirring plate, of the sliding plate, and the two ends of the spring are fixedly connected with the stirring plate and the sliding plate correspondingly; an auxiliary discharging block is arranged between the sliding plate and the botto