Energy-saving sodium sulfate dissolving and concentrating kettle

The utility model provides an energy-saving sodium sulfate dissolving and concentrating kettle which comprises a sodium sulfate dissolving and concentrating kettle body, a discharge pipe is integrally connected to an opening in the lower side of the sodium sulfate dissolving and concentrating kettle body, and a discharge valve is connected to a flange at the lower end of the discharge pipe; an upper flange of the sodium sulfate dissolving and concentrating kettle body is connected with a kettle cover, and an opening in the right upper side of the kettle cover is in threaded connection with a feed valve; the lower end of an output shaft of the stirring motor penetrates through the middle upper side in the kettle cover. Due to the arrangement of the sodium sulfate dissolving and concentrating kettle body, the concentrating kettle heat preservation shell, the steam exhaust valve, the condensate water drain valve and the steam input pipe, the double heat preservation function is favorably realized, and a sodium s