Salicylic acid crystallization reaction kettle with filtering structure

The salicylic acid crystallization reaction kettle with the filtering structure comprises a kettle body and a kettle cover, a stirring shaft is arranged at the center in the kettle body, a lifting shaft is in threaded connection with the center in the stirring shaft, a spring is connected to the outer side of the bottom of a shaft body of the lifting shaft in a sleeved mode, a driving piece is arranged at the top end of the stirring shaft, and the driving piece is in threaded connection with the lifting shaft. The driving part machine body is fixed on the kettle cover, an anchor stirrer is fixed at the bottom end of a shaft body of the lifting shaft, a scraping part is arranged on one side of the bottom end of the anchor stirrer, a filter screen is arranged at the bottom of the kettle body, a discharging port is formed in the inner wall, located on one side of the filter screen, of the kettle body, and an impurity discharging port is formed in the position, located in the center of the bottom end of the filte