Hydrofluoric acid powder drying furnace

The utility model relates to a hydrofluoric acid powder drying furnace. The hydrofluoric acid powder drying furnace comprises a furnace body and a converter arranged in the furnace body, wherein one end of the furnace body is provided with a hot air inlet and a discharge outlet, the other end of the furnace body is provided with a hot air outlet and a feed inlet, one end of the furnace body is provided with a first cover body, and the other end of the furnace body is provided with a second cover body. The hydrofluoric acid powder drying furnace is characterized in that the first cover body is hermetically connected with one end of the furnace body through moving and stationary sealing rings, and the second cover body is hermetically connected with the other end of the furnace body through a labyrinth seal. The hydrofluoric acid powder drying furnace provided by the utility model has the advantages that since a sealing method that the moving and stationary sealing rings and the labyrinth seal are combined is adopted and radial compensation is made for the change of the particle size of powder to be dried before and after drying, the phenomena of powder leakage are prevented from occurring at the two ends of the furnace body of the hydrofluoric acid powder drying furnace, and good sealing performance is realized; the problem of powder leakage of the labyrinth seal in the prior art is solved, the structure is simple and the popularization is facilitated.