Vacuum Freeze Dryer

  • Freeze drying is carried out at a low temperature, so it is especially suitable for many heat-sensitive substances. Such as proteins, microorganisms, etc. will not denature or lose biological activity. Therefore, it is widely used in medicine.
  • When drying at low temperature, the loss of some volatile components in the substance is small, suitable for some chemical products, medicines and food drying.
  • During the freeze-drying process, the growth of microorganisms and the action of enzymes cannot proceed, so the original appearance can be maintained.
  • Since it is dried in a frozen state, the volume is almost unchanged, the original structure is maintained, and no concentration phenomenon occurs.
  • The dried substance is loose and porous, in the form of sponge, dissolves rapidly and completely after adding water, and restores its original shape almost immediately.
  • It is carried out under vacuum with very little oxygen, so some easily oxidizable substances are protected.
  • It can remove more than 95-99% of the water, so that the dried product can be stored for a long time without deterioration.

Working Principle

It is to quickly freeze the liquid in the material into solid ice, and directly vaporize the water from the solid-state under the premise of insolubilization of the ice, and continuously remove the vapor, so as to achieve the purpose of drying the material.

Traditional drying can cause the material to shrink, destroying cells. The structure of the sample is not destroyed during freeze-drying because the solid components are supported by the solid ice in their place. As ice sublimates, it leaves pores in the dry leftover material. This preserves the integrity of the product’s biological and chemical structure and its activity.

Applications

  • Food industry: vacuum freeze-drying technology can be used for drying fruits and vegetables, meat and poultry, aquatic products, condiments, instant foods and famous and high-quality specialty products, etc. The water is good, the finished product is easy to store and transport, the cost is reduced, and the shelf life is prolonged.
  • Nutrition and health care: The vacuum freeze-drying process is used in drying nutritional and health care products such as royal jelly, ginseng, turtles, turtles, and earthworms, which makes people believe that the nutritional products are pure and natural.
  • Pharmaceutical industry: The vacuum freeze-drying method can be applied to the dehydration and preservation of Chinese and Western medicines such as serum, plasma, vaccines, enzymes, antibiotics, hormones, etc.
  • Biological research: Long-term preservation of blood, bacteria, arteries, bones, skin, cornea, nerve tissue and various organs using vacuum freeze-drying technology can be regenerated only by supplying water during use and still maintain their biophysical properties.
  • Others: For example, it can be used in aerospace insulation ceramic production, preservation of wood and silk products in archaeology, specimen production, special material preparation, etc., and can receive unique effects.
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