Sample drying box for preparing basic bismuth nitrate

The sample drying box comprises a box body, a sealing cover plate is hinged to the upper end of the box body, a plurality of air holes communicated with an inner cavity of the box body are formed in the two sides of the outer wall of the box body, and ventilation covers corresponding to the air holes in position are installed on the two sides of the inner wall of the box body; a bagged drying agent is placed in the ventilation cover, and a heating lamp tube is further fixedly arranged on the inner wall of one side of the box body. The ventilation covers are additionally arranged on the two sides of the box body, the bagged drying agents are placed in the ventilation covers, when the sealing cover plate is closed and air inside and outside the box passes through the ventilation holes and the ventilation covers, moisture in the air can be rapidly absorbed by the bagged drying agents, and the dried air is continuously interacted; meanwhile, the air in the box can be subjected to electric heating drying through t