喷雾干燥是液体物料经雾化器雾化成细小雾状液滴,与热空气接触表面积大大增加,水分迅速蒸发,数秒钟内即被干燥成粉末或细颗粒。由于其进风口温度在170℃以上,传热介质空气中含有氧气,对物料中易氧化成分有无影响,这是一个值得探讨的问题。维生素C(抗坏血酸)为白色或略带淡黄色 Spray drying is the atomization of the liquid material into atomized droplets in a fine mist. The surface area in contact with hot air is greatly increased, moisture evaporates rapidly, and is dried into powder or fine particles within seconds. Because the air inlet temperature is above 170°C, the air in the heat transfer medium contains oxygen, which has no effect on the easily oxidized components in the material. This is a problem that is worth exploring. Vitamin C (ascorbic acid) is white or slightly yellowish