Hot air circulating device for drying pre-crystallization system

The hot air circulating device comprises a box body and a U-shaped pipe, a rotating shaft is connected between the upper side wall and the lower side wall in the box body, a motor is fixedly connectedto the center of the upper top of the box body, an air heater is fixedly connected to the left side of the box body, and the upper end of the right side of the box body is fixedly connected with theU-shaped pipe. An air pipe is fixedly connected to the tail end of the U-shaped pipe, the tail end of the air pipe is fixedly connected to the lower end of the left side wall of the box body, a heating structure is fixedly connected to the air pipe, a discharging opening is fixedly connected to the lower end of the U-shaped pipe, a discharging pipe is fixedly connected to the lower portion of thedischarging opening, and the tail end of the discharging pipe is fixedly connected to the middle of the right side wall of the box body. According to the drying device, hot air can return to the box body after being exhausted,