Initial stage: The material to be dried is placed in the drying chamber of the rake dryer. The drying chamber is a sealed container that is resistant to high temperatures and vacuum.
Vacuum stage: Once the materials are placed, the air in the drying chamber is extracted to create a low-pressure environment, that is, a vacuum state. The air in the drying chamber is extracted through a vacuum pump or other vacuum device to form a vacuum environment.
Heating stage: In a vacuum state, the rake dryer will heat the materials in the drying chamber through a heater or other heating device. Heaters usually use electric heating or steam heating to transfer heat to the material.
Evaporation stage: Once the material is heated, the water in it begins to evaporate. Due to the low-pressure environment in the drying chamber, moisture quickly evaporates in the form of steam. The evaporated moisture will be pulled out of the drying chamber by a vacuum pump or other equipment.
Drying stage: As the water evaporates, the material gradually becomes drier. This process may take some time, depending on the nature of the material and drying requirements.
Ending stage: Once the material reaches the required dryness, the heater stops heating and the vacuum pump stops evacuation. When the pressure in the drying chamber returns to atmospheric pressure, the drying chamber can be opened and the dried materials can be taken out.
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