Drying Advantages Of Freeze Dryers
The freeze dryer consists of a refrigeration system, a vacuum system, a heating system, and an electrical instrument control system. The main components of the freeze dryer are a drying oven, a condenser, a refrigeration unit, a vacuum pump, a heating/cooling device, and the like. The freeze dryer works on the principle of 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, and removing it from the article to make the article dry. 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 freeze dryer 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. The freeze dryer adopts high-efficiency radiant heating to heat the material evenly; it adopts high-efficiency water trap and can realize rapid defrosting; adopts high-efficiency vacuum unit and can realize oil-water separation; adopts parallel centralized refrigeration system, multi-channel on-demand cooling, work Stable, energy-saving; artificial intelligence control, high control accuracy, easy to operate.
The quality requirements for freeze-dried products are: constant biological activity, uniform appearance and color, full shape, firm structure, fast dissolution rate and low residual moisture. To obtain high quality products, a comprehensive understanding of the theory and process of lyophilization should be obtained. The freeze-drying process of the freeze dryer includes three stages of pre-freezing, sublimation and re-freezing. Reasonable and effective shortening of the freeze-drying cycle has obvious economic value in industrial production.
