Method and device for preparing ammonium bifluoride from solid ammonium fluoride

The invention relates to the technical field of fluorine chemical industry, in particular to a method and a device for preparing ammonium bifluoride from solid ammonium fluoride, which are characterized in that the solid ammonium fluoride is used as a raw material, water is added for dissolving to prepare a saturated ammonium fluoride solution, and the ammonium fluoride is partially decomposed to form ammonia gas through heating concentration, so that the relative content of fluorine in a solution system is increased; and the characteristics that the density of ammonium bifluoride in the solution can be 1.5 g/cm < 3 > in a large bag and the density of ammonium fluoride is 1.11 g/cm < 3 > and is close to 1.0 g/cm < 3 > in water are utilized to realize centrifugal separation to obtain the ammonium bifluoride product, so that the production difficulty of the ammonium bifluoride product is greatly reduced, and the purity of the ammonium bifluoride product is guaranteed. The water resource consumption in the ammon