Small Freeze Dryer
The small freeze dryer consists of a refrigeration system, a vacuum system, a heating system, and an electrical instrumentation control system. The main components of the small freeze dryer are drying oven, condenser, refrigerating unit, vacuum pump, heating/cooling device and so on. small freeze dryer Its working principle is to freeze the items to be dried to below the triple point temperature, and then under vacuum conditions to make the solid water (ice) in the product directly sublimate into water vapor, remove from the goods, make the goods dry. After the material is pre-treated, it is sent to a quick-freezing chamber for freezing, then sent to a drying warehouse for sublimation and dehydration, and then packaged in a post-processing workshop. The small 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 coldness to the cold trap and drying chamber. The lyophilizer adopts high-efficiency radiant heating, and the material is heated evenly; the high-efficiency catching cold trap can be used to achieve rapid defrosting; the high-efficiency vacuum unit can be used to realize the oil-water separation; the parallel centralized cooling system is adopted, and the multiple-channels are on-demand cooling. Stable conditions, favorable energy saving; using artificial intelligence control, high control accuracy, easy operation.
The quality requirements for freeze-dried products are: constant biological activity, uniform appearance, color, full shape, firm structure, fast dissolution rate, and low residual moisture. To obtain high-quality products, we should have a more comprehensive understanding of the theory and process of freeze-drying. Freeze-dryer freeze-drying process includes pre-freezing, sublimation and re-freezing three stages. Reasonably and effectively shortening the cycle of lyophilization has obvious economic value in industrial production.
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