Spray granulation dryer is a kind of drying equipment that produces products after fluidizing, dedusting, atomizing, and solidifying materials to achieve particle size requirements. The process flow is generally that the air enters the bottom of the fluidized bed after being heated by a heater, passes through the distribution plate and contacts the material, so that the material is fluidized. The mother liquor or binder is sent to the atomizing nozzle by pressure pump and other pressure-making equipment, and then sprayed on the surface of the fluidized particles or the particles are bonded to each other after atomization. After continuous fluidization, coating, and drying, the particles gradually grow Large, discharge from the fluidized bed outlet after reaching the required particle size. It is widely used in chemical, pharmaceutical, food and other industries.