A spray dryer is a device used to transform liquids or slurries into a dry powder form. It works by atomizing the liquid substance into tiny droplets and then rapidly drying these droplets using hot air or gas to remove moisture or solvents. This process enables the production of fine powder or granules with specific particle size, shape, and density, facilitating storage, transportation, or further processing. In the food industry, spray dryers are employed to produce products like milk powder, coffee, and powdered flavors. In pharmaceuticals, they are used to create dry forms of medications for easier dosing and preservation.