In the spray dryer operation, it is important to determine the temperature (hot air temperature) and the outlet temperature (exhaust air temperature) of the hot air entering the tower. Exhaust air temperature and product moisture The content should be determined according to the moisture allowed by the product. The higher the hot air temperature, the higher the thermal efficiency and the better the economy. However, too high a hot air temperature will cause the quality of the product to deteriorate, so The hot air temperature must be appropriately increased under the premise of ensuring product quality. The hot air temperature of the spray dryer will have a significant effect on the bulk density of the product. High temperature hot air has a tendency to produce low bulk density, which is due to the rapid drying of hot air. The surface hardening of the particles causes the residual moisture to swell, which promotes the formation of balloon-like hollow particles. If high bulk density (low specific volume) is required, or solid particles are required, the design should not Use high temperature hot air to contact newly formed droplets. In the drying of chemicals, the hot air temperature is as high as 538 ° C, and the product particles are large. It can be found that there is enough pressure on the residual steam. The outer surface is blown into a hollow. In food spray drying, the hot air temperature generally does not exceed 177 ° C, so the initial diameter of the hollow particles formed is not as large as the chemical. The hot air inlet temperature of the spray dryer will directly affect the evaporation intensity of the drying chamber. For non-heat sensitive materials, Yingdu Town can use high temperature hot air to increase the evaporation intensity. Aloe Oil,Jojoba Oil,Olive Oil,Cosmetics Essential Oil Ji'An ZhongXiang Natural Plants Co.,Ltd. , https://www.jazxnaturaloils.com
Spray dryer requirements for drying temperature