关键词: 奶粉生产;降膜式蒸发器;直接式杀菌;应用;注意事项

Abstract: In the production of milk power, direct sterilization offers many advantages over indirect sterilization such as more stable and more evenly distributed sterilization temperature, better sterilization effect, being less easy to cause fouling and coking, and longer time intervals for cleaning. Its disadvantage lies in its high requirements for the quality of steam as the material fluid is moistened as a result of direct mixing of steam during the sterilization process and the absorbed moisture has to be removed by flash evaporation after the sterilization. Therefore, steam must be strictly filtrated or be generated by a specialized generator before coming into contact with the material fluid. In this study, a three-effect falling film evaporator RNJM03-8000, manufactured by Huayu Dairy Machinery Manufacturing Co. Ltd., was used to evaluate its application for the production of milk powder. The design of direct sterilization for producing milk powder using the device and points for attention were elaborated.

Key words: milk production；falling-film evaporator；direct sterilization；application；points for attention