Exploration into the Drying Speed of Double Cone Rotary Vacuum Drying Machine

1. The concept of vacuum drying speed

The drying process of materials begins with the vaporization of moisture on the surface of the material and its removal by vacuum equipment. The moisture on the surface of the material gradually decreases due to vaporization, and a temperature difference is formed between the interior and surface of the material. The internal moisture continuously diffuses towards the surface under the effect of temperature difference and vaporizes upon reaching the surface. In addition, during the vacuum drying process, there is a pressure difference that accelerates the movement of vaporized water molecules towards the vacuum space. In the process of vacuum drying, people always hope to accelerate the drying speed and shorten the drying time, but there are several factors that affect the drying speed:

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