1. The parts in contact with the product must be easy to clean and sterilize;
2. There should be measures to prevent coke powder to prevent the vortex and backflow of hot air;
3. Prevent air from carrying impurities into the product;
4. Configure the temperature and pressure indicator recorder device, which is convenient for checking the production operation;
5. Dust recovery device with high recovery rate;
6. Powder should be quickly cooled to improve solubility and instant solubility;
7. Drying room temperature and exhaust temperature are not allowed to exceed 100 ℃, to ensure safety and quality;
8. The concentrated milk droplets evenly contact with the hot air during spraying to improve the thermal efficiency;
9. Minimize the sticking to the viscous substance.