Drying Technique of Freeze Dry Machine

Drying technique is used on the Freeze Dry Machine uses by the principle of sublimation. It freezes the dried material at a low temperature and then directly sublimates the frozen water molecules into water vapor under a suitable vacuum environment. The product obtained by lyophilization is called a lyophilizer, and the process is called lyophilization.

The substance is always in a low temperature (freezing state) before drying, and the ice crystals are evenly distributed in the substance, and the sublimation process does not cause concentration due to dehydration to avoid side effects such as foaming and oxidation caused by water vapor. The dry material is porous in the shape of a dry sponge, and the volume is basically unchanged, so it is easily soluble in water and restored to its original state. Physical and biological denaturation of dry matter is prevented to the greatest extent.

The Freeze Dry Machine is composed of a refrigeration system, a vacuum system, a heating system, and an electrical instrument control system. The main components of the lyophilizer are a drying oven, a condenser, a refrigeration unit, a vacuum pump, and a heating/cooling device.

The lyophilizer works by freezing the dried object to below the triple point temperature and then sublimating the solid water (ice) in the article to water vapor under vacuum conditions, removing it from the products, and drying the products. After the material is pre-treated, it is sent to the quick-freezing bin for freezing, and then sent to the drying bin for sublimation dehydration, and then packaged in the post-treatment workshop. The vacuum system establishes a low-pressure condition for the sublimation drying chamber. The heating system provides sublimation latent heat to the material, and the refrigeration system provides the required cooling capacity to the cold trap and the drying chamber.

GUANFENG specializes in the production and sales of Vacuum Freeze Dry Machine, Automatic Continuous Multistage Belt Dryers(AD), Freezing IQF, as well as Fruit Processing Machine, Vegetable Processing Machine, Food Processing Machine equipment. We sincerely invite you to pay a visit to a brilliant future!

As a professional freeze drying machine and Vegetable Processing Machine manufacturer, we welcome international customers to discuss cooperation, we will provide warm and thoughtful service for you. Contact us today to begin sourcing or go to my webiste https://www.gf-machine.com/product/pre-processing-equipment/ for further more information.

Advantages And Applications of Freeze Dry Machine I

Freeze Dry Machine adopts the working principle of cooling condensation, mainly composed of three parts: heat exchange system, refrigeration system and electrical control system. The compressed air first enters the pre-cooler for heat exchange of gas or gas, removes part of the heat and then enters the hot and cold air exchanger and exchanges cold air that has cooled from the evaporator to the pressure dew point for heat exchange to make the temperature of the compressed air Further decrease.

0freezedrying-machine

After that, the compressed air enters the evaporator and exchanges heat with the refrigerant. The temperature of the compressed air drops to 0-8*C, and the moisture in the air is precipitated at this temperature, separated by the gas-water separator, and discharged through the automatic drainer. The dry, low-temperature air enters the hot and cold air exchanger for heat exchange, and is output after the temperature rises.

The Freeze Dry Machine uses physical principles to freeze the moisture in the compressed air below the dew point to make it from the air.

Freeze Dry Machine in the precipitation limites to the freezing point temperature of water, theoretically its dew point temperature can be close to 0 degrees. In fact, the dew point temperature of a good freeze dryer is generally about 5 degrees.

Traditional drying destroys the cells and causes the material to shrink. The structure of the sample is not destroyed during the freeze-drying process because the solid component is supported by the firm ice on its seat. If the ice sublimes, it will leave pores in the machine in the remaining material, which preserves the biological and chemical structure of the product and the integrity of activity.

As a professional freeze drying machine and Vegetable Processing Machine manufacturer, we welcome international customers to discuss cooperation, we will provide warm and thoughtful service for you. Contact us today to begin sourcing or go to my webiste https://www.gf-machine.com/product/pre-processing-equipment/ for further more information.

Advantages of GF Freeze Dry Machine

There are various drying methods such as sun drying, boiling, oven drying, spray drying, and vacuum drying, but ordinary drying methods are usually carried out at temperatures above 0℃. The products dried will shrink the size and harden the texture. Most of the volatile components are lost, some heat-sensitive substances are denatured and deactivated, and some substances are even oxidized. Therefore, the dried product has a large difference in properties compared with that before drying. The Freeze Dry method is basically carried out below 0℃, that is, in the state where the product is frozen, and only when the residual moisture content of the product is lowered in the later stage is the temperature above 0℃, but generally, it does not exceed 40℃. Under vacuum conditions, when the water vapor is directly sublimated, the drug remains in the frozen ice shelf, forming a sponge-like porous structure, so the volume after drying is almost constant. Before using it again, as soon as you add water for injection, it will dissolve immediately. GF Freeze Dry Machine has some advantages over other machines.

  • * Many heat-sensitive substances will not be denatured or inactivated.
  • * When dried at low temperatures, some of the volatile components in the material are lost.
  • * During the freeze-drying process, the growth of microorganisms and the action of enzymes cannot work, so that the original traits can be maintained.
  • * Since it is dried in a frozen state, the volume is almost constant, with the original structure, and concentration does not occur.
  • * Since the moisture in the material exists in the form of ice crystals after pre-freezing, the inorganic salt-soluble substances originally dissolved in water are evenly distributed in the material. During the process of sublimation, the substances dissolved in water are precipitated, which avoids the phenomenon that the inorganic salt carried by the internal moisture migration to the surface in the general drying method is precipitated on the surface to cause surface hardening.

As a professional manufacturer and supplier of Freeze Dry Machine, GuanFeng welcome new and old customers, friends from various circles at home and abroad to visit and join hands to create a better future! Click gf-machine or gf-machine.com for furhter more information.