Method for sublimating and refining iodine by circulating air

The invention discloses equipment and a method for sublimating and refining iodine by circulating air, the equipment comprises a heating tank, a condensation tank, a fan and a connected gas pipe, circulating air supply equipment is connected with the heating tank through the gas pipe, and the heating tank is connected with the condensation tank through the gas pipe; and the condensation tank is aswing type tank. In the iodine crystal prepared by the equipment and the method for sublimating and refining the iodine by the circulating air, the content of the iodine can reach about 99.5%, and thecontent of heavy metal(in terms of lead) is lower than 0.1 mg/kg; little gas is exhausted, and a special tail gas treatment system is not needed; the capacity is high, and due to the high air volume,each set of device can produce 200 kg or above per hour; and the iodine residue in the heating tank is low, the heating tank can be cleaned with water, and no other waste is left except saline water. 本发明公开了一种循环风升华精制碘的设备和方法，该设备