Description
There are many laboratory freeze dryer machine suppliers, and this kinds of the machine is actually a kind of apparatus, and it is mainly used in lab or institute for research or study. Too much advertisement of laboratory freeze dryer machine in the internet, it affected the users to find out a suitable supplier of industrial scale freeze dryer, because freeze dryers are not only for laboratory, especially in the recent years, as the increase of life quality, there is a big demand to high quality freeze dried food, to preserve nutrition with nice color and shape.
Freeze dryers were used in pharmaceutical industry in the past half century. The pharmacy must be dried by the technology of lyophilization, also called freeze drying. But nowadays, freeze dryers are widely used in food industry. The market of freeze dried food is huge, so a laboratory freeze dryer is useless to food industry. It cannot help users to accumulate the freeze drying data, as the structure of the lab freeze dryer machine is quite different to production scale ones. The following table is the replacement of laboratory freeze dryer.
Could you provide samples for test?
A: Yes, we provide our customers with free samples (5 boxs), but the customer should bear the freight.
Technical Parameter
sketch
The basic principle of freeze-drying is based on the three-state change of water. Water has solid state, liquid state and gas state. The three states can transform and coexist with each other. When water is at the three-phase point (temperature is 0.01 ℃, vapor pressure is 610.5pa), water, ice and steam can coexist and balance each other. In the high vacuum state, by using the sublimation principle, the moisture in the pre frozen material can be directly removed by sublimation in ice state without melting ice, so as to achieve the purpose of freeze-drying. Freeze dried products are spongy, no drying shrinkage, excellent rehydration and little moisture content. They can be stored and transported at room temperature for a long time after packaging. Because of the incomparable advantages of other drying methods, vacuum freeze-drying technology has been more and more popular since it came out, and has been widely used in medicine, biological products and food. Serum, bacteria, traditional Chinese and Western medicine and other biological products are mostly bioactive substances. Vacuum freeze-drying technology also provides a good solution for the preservation of biological activity.
Freeze drying is a kind of drying technology based on the principle of sublimation. It is a process that the dried material is quickly frozen at low temperature, and then the frozen water molecules are directly sublimated into water vapor escaping in the appropriate vacuum environment. The product obtained by freeze-drying is called lyophilizer, and the process is called lyophilization. The material is always in low temperature (frozen state) before drying, and ice crystals are evenly distributed in the material. The sublimation process will not be condensed due to dehydration, avoiding the side effects such as froth and oxidation caused by steam. The dry substance is porous and almost unchanged in volume. It is easy to dissolve in water and recover to its original state. In order to prevent the physical, chemical and biological denaturation of dry materials. Freeze dryer is composed of refrigeration system, vacuum system, heating system and electrical instrument control system. The main components are drying oven, condenser, refrigeration unit, vacuum pump, heating / cooling device, etc. Its working principle is to freeze the dried articles to below the three-phase temperature, and then sublimate the solid water (ice) in the articles into steam directly under the vacuum condition, and then drain the dry articles. After pretreatment, the materials are sent to the quick freezing bin for freezing, and then sent to the drying bin for sublimation and dehydration, and then packaged in the post-processing workshop. The vacuum system establishes a low pressure condition for the sublimation drying bin, the heating system provides sublimation latent heat to the material, and the refrigeration system provides the required cooling capacity to the cold trap and drying chamber. The equipment adopts high-efficiency radiation heating, materials are evenly heated; high-efficiency water-cooling trap is adopted to realize quick defrosting; high-efficiency vacuum unit is adopted to realize oil-water separation; parallel centralized refrigeration system is adopted, multi-channel on-demand cooling is adopted, with stable working condition and energy-saving; artificial intelligence control is adopted, with high control precision and convenient operation. The quality requirements of Xinyu instrument network for freeze-dried products are as follows: the biological activity remains unchanged, the appearance color is uniform, the shape is full, the structure is firm, the dissolution speed is fast, and the residual moisture is low. In order to obtain high quality products, we should have a comprehensive understanding of the theory and technology of freeze-drying. The freeze-drying process includes three stages: pre freezing, sublimation and re freeze-drying. It has obvious economic value in industrial production to shorten the freeze-drying cycle reasonably and effectively.
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