The freeze dryer consists of drying box, refrigeration system, vacuum system, media heat exchange circulation system, automatic control system, pneumatic system and in-situ cleaning and sterilization system.
The basic principle of freeze drying is based on the three states of water. Water has solid, liquid and gaseous states, and the three states can both convert and coexist with each other. Water, ice and water vapor can coexist and balance each other. Under high vacuum, using the principle of sublimation, the water in the pre-frozen material, without the melting of ice, directly sublimated into water vapor in ice state is removed, so as to achieve the purpose of freeze drying.
After the machine is turned on, the material is put into the material box for freezing. The freezing process of the material. On the one hand, the vacuum system will take away part of the water; on the other hand, when the material is frozen, the water contained in some molecules will be discharged to the surface of the material to be frozen. After reaching the requirement of freezing, the material will be heated and dried by the heating system, and the water contained in the material will be brought to the freezing and trapping box for freezing through the vacuum, so as to reach the requirement of freezing and drying the material.
1. The boiling point of the material solution under vacuum is lowered, so it can obtain higher drying rate at lower temperature and fully utilize the heat.
2. Suitable for low-temperature drying or heat-sensitive materials,maximize the preservation of food color, aroma and taste
3. It can dry materials containing solvents or need to recover solvents, especially suitable for drying process afraid of oxidizing materials.
4. It's static drying, so not damage the shape of dry materials.
Freeze-dried products are spongy, no dry shrinkage, excellent rehydration, very small water content, no need to add preservatives packaging, the corresponding packaging can be stored and transported at room temperature for a long time.
Refer to the following products :
Vegetables: parsley, cabbage, scallions, spinach, etc.
Flavoring: jam, soup, curry sauce, meat sauce, etc.
Fruits: banana, lychee, apple, longan, strawberry, etc.
Fish and meat: beef, shrimp, sea cucumber, prawns, turtle, squid, etc.
Foodstuffs: instant noodle, instant porridge, military food, casual meal, pet food, etc.
Micro-powder: garlic powder capsule, baby milk powder, ice cream powder, etc.
Edible mushrooms: matsutake mushroom, shiitake mushroom, enoki mushroom, etc.
Pharmaceuticals: dried powder, freeze-dried asparagus powder, freeze-dried burdock tablet, etc.
01 What is a freeze-drying machine?
Freeze-drying is a technology that uses the principle of sublimation to dry. It is a process in which the dried substance is quickly frozen at a low temperature, and then in an appropriate vacuum environment, the frozen water molecules directly sublimate into water vapor escape. The product obtained from freeze-drying is called freeze-drying, which is called freeze-drying. The substance is always in a low temperature (frozen state) before drying, and the ice crystals are evenly distributed in the substance, and the sublimation process will not be concentrated due to dehydration, avoiding the side effects such as foam and oxidation caused by water vapor. The dry material is a dry sponge porous, the volume is basically unchanged, and it is easily dissolved in water and restored to its original state. To prevent to the greatest extent the physical, chemical and biological denaturation of dry substances.
02 Application of fruits freeze dryer:
It is suitable for the drying of high-grade raw materials, traditional Chinese medicine, biology, wild vegetables, dehydrated vegetables, food, fruits, chemicals, drug intermediates and other materials. Freeze-vacuum drying is a new type of box structure introduced by the vacuum freeze-dryer, which combines the refrigeration system, vacuum system, thermal oil heating system and moisture drainage system. It makes great use of the material storage space in the box for freeze-vacuum drying.
04 Technical parameters of Vacuum Freeze Dryer :
Model | MVF-1 | MVF-3 | MVF-5 | MVF-10 | MVF-20 | MVF-30 | MVF-50 | MVF-100 | MVF-200 |
Size(M) | 1.5*1*1.7 | 1.8*1*2 | 3.5*1.8*2.3 | 5*1.8*2.5 | 5.3*1.9*2.4 | 6.2*2*2.5 | 6.5*2.4*2.7 | 11*3*3.5 | 17.9*3.1*3.5 |
Power (KW) | 7 | 10 | 16 | 22 | 38 | 52 | 84 | 158 | 293 |
Tray effective area | 1.1㎡ | 3.2㎡ | 5.1㎡ | 11㎡ | 21㎡ | 31㎡ | 51㎡ | 101.1㎡ | 202.2㎡ |
Pre-freeze temperature | -18℃ -60℃ | -18℃ -60℃ | -18℃ -60℃ | -18℃ -60℃ | -18℃ -60℃ | -18℃ -60℃ | Quick-freeze storage temperature -18℃ -60℃ | Quick-freeze storage temperature -18℃ -60℃ | Quick-freeze storage temperature -18℃ -60℃ |
Cold-stage temperature | -50℃ -80℃ | -50℃ -80℃ | -50℃ -80℃ | -50℃ -80℃ | -50℃ -80℃ | -50℃ -80℃ | -35℃ -60℃ | -35℃ -60℃ | -35℃ -60℃ |
Vacuum | ≥1PA | ≥1PA | ≥1PA | ≥1PA | ≥1PA | ≥1PA | ≥15PA | ≥15PA | ≥15PA |
Heating method | Silicon oil, electric heating | Silicon oil, electric heating | Silicon oil, electric heating | Silicon oil, electric heating | Silicon oil, electric heating | Silicon oil, electric heating | Pure water steam heating | Pure water steam heating | Pure water steam heating |
Capacity | 10KG | 30KG | 50KG | 100KG | 200KG | 300KG | 500KG | 1000KG | 2000KG |