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Origins of Vacuum dying process-
 Vacuum technology within the context of mixing, as well as drying, has been a game-
changer since it was originally pioneered in the 1970s.
 It boils off moisture and solvents at much lower temperatures, leaving heat-sensitive
components undamaged.

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A Brief Study of Vacuum Drying Process-
 A drying method that places the object to be dried in an enclosed container
to vent air and reduce the pressure with a vacuum pump in order to artificially
increase the water vapor partial pressure difference.
 Higher drying rate, lower drying temperature, and oxygen-deficient processing
environment.
 Beneficial and help to improve the quality and nutritional value of the dried fruits
and vegetables

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Main Components of Vacuum Drying Process _
 Feed Hopper
 Dryer/Reactor
 Pulse Back Filter
 Condensate Return
Pump
 Condenser
 Condensate Tank
 Vacuum Pump

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 heat-sensitive materials,
 dusty materials,
 hygroscopic materials,
 toxic materials,
 drugs which are required as porous end products
Uses of Vacuum Dryer

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Vacuum belt dryer is a continuous infeed and discharge vacuum drying equipment. Liquid product is
conveyed into dryer body by infeed pump, evenly spread on belts by distribution device. Under high
vacuum, the boiling point of the liquid is lowered; water in the liquid material is evaporated. Belts move
on the heating plates evenly. Steam, hot water, hot oil can be used as heating media. With the moving
of the belts, the product goes through from the beginning evaporating, drying, cooling to discharging in
the end. The temperature decreases through this process, and can be adjusted for different products.
Special vacuum crusher is equipped at the discharge end to produce different size end product. The dry
powder or granule product can be automatically packed or continue with subsequent process.
Vacuum belt dryer turn traditional static drying to vacuum dynamic drying, reduce drying time from 10-
20 hours to 30-60 minutes. In vacuum belt dryer, the drying temperature is adjustable for different
products. It solves the high temperature problem with spray dryer and denaturation problem due to long
drying time with traditional drying oven. Color, solubility, ingredients preservation of the dry product from
vacuum belt dryer are incomparable.
Vacuum Belt Dryer for Powder Extract

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1.Vacuum drying reduces pressure, lowering the temperature and
humidity inside the oven. Since the process pulls moisture from inside
the chamber, it allows the material to dry significantly faster than
it takes to carry out a proper freeze-drying process.
2.This drying method enables you to speed up your production process
while reducing energy consumption. You can cut down on energy expenses
and turnaround times, saving you costs and earning more revenue
overall.
3.The quality of the output is better than that of traditional drying
processes because the lack of humidity inside the container allows the
material to dry uniformly.
4.Drying action is faster as heat is efficiently transferred
throughout the dryer’s body due to its large surface area.
5.It reduces the oxygen content inside the container, which prevents
the oxidative deterioration of dried material. This is especially
important when processing dry, flammable, and dangerous explosive
goods.
Advantages of Vacuum Drying

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