First of all, due to the large surface area of droplets, the drying time required for materials is relatively short, usually in seconds. This feature makes spray drying a fast and effective drying method, which can greatly improve production efficiency.
Secondly, in the high-temperature airflow, the temperature of the material wetted on the surface will not exceed the wet bulb temperature of the drying medium, and the temperature of the final product is not high because of the rapid drying. This feature makes spray drying especially suitable for treating heat-sensitive materials, which can avoid the problem of deterioration or performance degradation of materials due to heating during drying.
In addition, spray drying has high flexibility and can be operated and adjusted according to the quality indexes of different products. By changing the operating parameters and nozzle structure, products with different particle size distribution, product shape, product properties (such as no dust, fluidity, wettability and instant solubility), product color, fragrance, taste, biological activity and final product moisture content can be produced. This feature enables spray drying to meet the production needs of different products and has a wide range of applications.
Spray drying can also simplify the process. The solution can be directly made into powder products in the drying tower, which saves the steps of evaporation, crystallization, separation and washing in the traditional process, simplifies the process flow and reduces the equipment investment and production cost.
Aibu non-stop spray drying series
In the feed industry, there is plasma protein powder, a functional and nutritious animal feed in protein. This is a new resource of protein. The processing technology of plasma protein powder is to preserve the fresh blood of animals collected in slaughterhouse at low temperature, and then spray-dry it with special technology. Finally, plasma protein powder is milky white or light brown powder product.