Contact Info
TEL: 0571-88963075
FAX: 0571-88963148
Add: 8# JIubao Road, Jiuxian Street, Tonglu County, Hangzhou, China

ZG-125m² Large-scale Freeze Dryer (1250kg/batch)

Main specifications
Input quantity: 1250kg
Condenser lowest temperature: ≤-50℃
Condenser capacity: 1500kg
Final vacuum: ≤5Pa
Total power: 185 kw
Service area and height: 240m²x4.5m
Weight: 4000kg
INQUIRY
Description
Main Features
1.High efficient, stable and high quality imported Refrigerator, easy to maintain and operate;
2.The vacuum system has dual system: the pre-pumping unit and the maintenance unit; improve the stability and durability of the system;
3.Equipped with the independent quick freezing room, the pre-cooling and drying are finished separately to shorten the producing time and ensure continuous producing;
4.Touch screen operation, PLC controlling, real-time monitoring, and alarm function;
5.Connecting to the computer, remote control, freeze-drying curve and data recording;
6.Use international standard refrigerant to achieve good cooling effect, energy saving and green development.
Applicable Range
1.Pharmaceutical industry: vacuum freeze-drying can be applied in the drying of serum, plasma, vaccines, enzymes, hormones and so on.
2.Food industry: it can dry the coffee, vegetable, fruit, meet and maintain the original color, aroma, taste, appearance and nutrients of them, which will be easily preserved and transport.
3.Nutrition health industry: with the freeze-drying of royal jelly, ginseng, terrapin, pearl, snake, turtle, the nutrients and active component of these products won’t loss.
4.Biological study: the freeze-drying can long preserve blood, bacteria, artery, bones, skin, nerve tissue, organs, which can rebirth with water completely.
5.Others: it has a unique effect in producing adiabatic ceramic in space industry and storing specimens and relic in archaeological industry.
Plan Drawing (Reference)

The Principle of Freeze Drying
  One way of keep food without spoilage is drying. There are many ways to dry, like sun drying, boil drying, spray drying and vacuum drying and etc. But these drying method is processing over 0 or higher temperature. There are many disadvantages: the products are generally smaller in size, the hard texture, and some substances will even oxidize, most of the volatile components will lose, and some heat-sensitive material, such as protein, vitamins will change their nature, the microbes will loss the biological activity, and the dried material is not easily dissolved in water. Therefore, the dried products have a lot in nature compared with the fresh one. The freeze-drying method is different from the above, basically the drying temperature is below 0 , and in order to further reduce the residual moisture, it needs to rise the temperature above 0 but generally won’t over 50 .
  Freeze-drying is to pre-freeze the material into solid state that contains large amount of water, then sublimate the water vapor directly out of the material under vacuum condition, so it will keep its original size. The temperature’s drop of the product will slow down the speed of sublimation, in order to increase the sublimation rate to shorten the drying time, the product must be properly heated. The Freeze-drying process is carried out under lower temperature.
The advantages of Freeze Drying
1.Low temperature freeze-drying is practically suitable for heat-sensitive material. Such as protein, microorganisms, they won’t degeneration or lose biological activity with freeze-drying, so it is widely used in medical industry.
2.Dry at low temperature, the loss of some volatile components is very small. So it is fit for some chemical products, pharmaceuticals and food drying.
3.During the freeze-drying process, the growth of microorganisms and enzymes function does not proceed, so they can maintain the original character.
4.Freeze-drying within the frozen state, the volume is almost unchanged and maintain the original structure, and no enrichment phenomenon.
5.After drying, the material will be loose and porous, like sponge. After adding water the material dissolves rapidly and completely and regain the original character almost immediately.
6.As drying under vacuum, there is little oxygen, so a number of easily oxidized components have been protected.
7.Drying can eliminate more than 95-99% of moisture, so that the dried product can be stored for a long time without deterioration.
Therefore, the freeze-drying is widely used in pharmaceutical industry, food industry, researches and other ways.