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Development of Spray Dryer in Dairy Industry Production The spray dryer was first used in the milk powder industry in 1901. It was only used in the production of the powdered milk industry in the 1920s. It began to be used in China in the late 1940s. The earliest structure belongs to the pressure box type (horizontal type). The atomization of the material is a two-fluid type, and the power consumption is large. By 1958, the Ministry of Light Industry in Heilongjiang Province promoted animal husbandry to produce milk powder using a small pressure spray drying method. In 1955, the Harbin Songhuajiang Milk Factory produced milk powder for the first time using a centrifugal spray method. The two types of spray dryers were flat-bottomed structures at the time, and the powder was batch-typed, and each powder was artificially powdered for every shift.
In the mid-1960s, box-type pressure drying equipment appeared in the form of a conical bottom with a spiral powder extractor (auger). The first vertical multi-sprayer pressure spray dryer was born in the early 1970s. Its appearance reduced the effective volume of the spray dryer by nearly half, and produced powder continuously without stirring the dragon. In the 1980s, a single-spray vertical pressure spray dryer was also produced. Its application in the milk powder industry is a key step in promoting the technical progress of China's milk powder industry and lays a foundation for promoting the rapid development of China's milk powder industry.
In the spray drying process, the material is pumped into the spray dryer and dispersed by the atomizer into small droplets. After the air is heated, it is sent to the drying chamber and mixed with the material mist. After the drying process, the dried product is separated. After storage or put into use directly. The powdered milk produced by the spray drying method is a uniform powdery product, and it can be packaged directly into a finished product without the need of drying, cooling, smashing, etc., and the production process of milk powder is mechanized, continuous, and large-scale. The surface temperature of the material will not be too high and the quality of the milk powder product will be improved. Therefore, the spray dryer plays an enormous role in the production of the milk powder industry, and there is a tendency for the amount of dry water to increase. However, spray drying is a highly energy-consuming process, and because the product quality after drying is high and the moisture content does not fluctuate greatly, it is required to strictly control the drying temperature and other operating parameters. Therefore, the correct selection and operation and control of the spray dryer are required. The rational design of the system is essential to ensure product quality, energy conservation and consumption reduction, not only to contribute to the promotion and promotion of scientific and technological progress and development of the dairy industry in China, but also to promote and promote scientific and technological progress and development in other industries. The economic growth of the motherland has made even greater contributions.
Development and Use of Spray Dryer in Dairy Industry
In the production of dairy products in China, the production of milk powder accounts for about 80% of the total output of dairy products because milk powder is convenient for storage and transportation. In the production of milk powder, the drying section is one of the most important steps in the production of milk powder. Only the amount of water evaporated in the drying process is almost equal to the quality of milk powder to be produced. In general, the product's production process determines the product's production equipment and control system, but the application of advanced equipment and control systems can also change the product's production process. The application of the spray dryer in milk powder production is a typical example.