Factory direct industrial hot compressed air dryer home freeze drying machine gold supplier

 China Supplier High Quality Vacuum Freeze Dryer

Drying method is varied, such as drying, cooking, drying, vacuum drying and spray drying, but ordinary drying methods are generally above 0 ℃ or under higher temperature. Drying products generally have the problem of shrinking volume and hardening texture, most volatile components will be lost, some heat sensitive substances denaturation, inactivation, and some substances even oxidation. Therefore, compared with before drying, the dried product has great difference in character. Freeze-dried law basically under 0 ℃, namely, under the product freeze state only in the later when reduce the residual water content of the products, to make products to more than 0 ℃ temperature, but is generally not more than 40 ℃.

Hot sale factory price standard typefood lyophilizer /food freeze dryer for medicine or food

Under vacuum conditions, when water vapor sublimates directly, the drug remains in the ice shelf when it freezes, forming a spongy porous structure that is almost the same size when it dries. Before reuse, simply add water for injection and it will dissolve immediately. Compared with conventional methods, freeze-drying method has the following advantages:

* many heat-sensitive substances do not degenerate or become inactivated.

* when dried at low temperature, the loss of some volatile components in the substance is very small.

* during lyophilization, microbial growth and enzyme action cannot be carried out, so the original character can be maintained.

* because it is dried in a frozen state, the volume is almost constant, maintaining the original structure and no condensation occurs.

Hot Sale Food Freeze Dryer Beef and Chicken / Mini Freeze Dryer

* as the water in the material exists in the form of ice crystals after pre-freezing, the inorganic salts dissolved in water are distributed evenly in the material. During sublimation, dissolved substances in water are precipitated out, which avoids the phenomenon of surface hardening caused by the inorganic salts carried by the transfer of moisture inside materials to the surface in the common drying method.

* after drying, the material is loose and porous, like a sponge. After adding water, it dissolves quickly and completely, almost immediately returning to its original character.

* because drying takes place in a vacuum, oxygen is scarce, so some easily oxidized substances are protected.

* drying can remove more than 95% ~ 99% of the water, so that the product can be preserved for a long time after drying without deterioration.

* because the material is in a frozen state and the temperature is very low, the temperature requirement of the heat source for heating is not high. The requirement can be met by using a heater with normal temperature or low temperature.

Vacuum laboratory Freeze Dryer for Vaccine Food Fruit herb, factory price

If the freezing chamber and the drying chamber are separated, the drying chamber does not need adiabatic, there will not be a lot of heat loss, so the use of heat energy is very economical.There is no such thing as perfect technology, and the main drawback of vacuum freeze drying is its high cost. Since it needs vacuum and low temperature conditions, the vacuum freeze-drying machine should be equipped with a set of vacuum system and low temperature system, so the investment cost and operation cost are relatively high.

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