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Comparative analysis of hotspots used in the production of vacuum rake dryers. Under the stirring of continuously rotating rake teeth, when the material comes into contact with the shell wall, the surface constantly updates. The dried material is indirectly heated by steam, which is conducive to the discharge of internal and surface moisture of the dried material, and facilitates the movement of water molecules in the dried material, achieving the drying goal. The rake teeth of the vacuum rake dryer continuously rotate in both positive and negative directions, stirring the dried material evenly to avoid overheating and easy escape of moisture. The shell obtains low-temperature products, which is an intermittent operation with long drying time and low yield; Due to the difficulty in clearing materials, it is not suitable for production with frequent variety changes

Under the stirring of continuously rotating rake teeth, when the material comes into contact with the shell wall, the surface constantly updates. The dried material is indirectly heated by steam, which is conducive to the discharge of internal and surface moisture of the dried material, and facilitates the movement of water molecules in the dried material, achieving the drying goal.