Disodium hydrogen phosphate can be used as water softener, fabric weighting agent, fire retardant, and used in glaze, welding flux, medicine, pigment, food industry and preparation of other phosphates. Emulsifier quality improver, nutrition enhancer, fermentation aid, chelating agent and stabilizer. Used as boiler water softener, flame retardant for fabric, wood and paper, glaze and soldering flux. Used in the production of detergents, cleaning agents for printing plates and Chemicalbook mordants for dyeing. In the printing and dyeing industry, it is used as a stabilizer for hydrogen peroxide bleaching and a filler for rayon (to enhance the strength and elasticity of silk). It is a raw material for manufacturing sodium pyrophosphate and other phosphates, and also a culture medium for monosodium glutamate, erythromycin, penicillin, streptomycin and sewage production products. It is also used for electroplating and leather polishing. As a quality improver, PH regulator and nutritional enhancer in food industry,

By spray drying method, disodium hydrogen phosphate dodecahydrate is added into a dissolving tank to be heated and dissolved, a small amount of industrial phosphoric acid is added, the pH is adjusted to 8.8-9.0, the temperature of the solution is 80-85℃, and the solution is pumped to a metering tank, which is atomized by an atomizer. The atomizer adopts a two-flow steam-driven nozzle, the steam pressure is 0.15-0.3 MPa, the steam flow angle of the atomizer is 3 ChemicalBook 0 with the horizontal, and the steam-liquid ratio is 0.4-0 The inlet temperature of hot gas is 650-750℃. It can be dried in parallel or countercurrent. Such as countercurrent drying, the inlet temperature is 620-650℃ and the outlet temperature is 140-150℃. The particle size of the finished product is about 90μm, accounting for 60%, and the moisture content is less than 1%. So as to obtain a finished product of anhydrous disodium hydrogen phosphate.