After the quick-frozen raw materials are selected, rinsed, shaped, and placed in the previous process, they can enter the freeze-drying stage. The first step of lyophilization is to freeze the lyophilized material, and place the material tray in the lyophilizer for quick freezing (some lyophilizers do not have a quick-freezing function, and a quick-freezer is required)....

The freeze dryer is one of the drying methods for the purpose of storing articles. The reason why the article will be damaged, rotted and deteriorated is mainly due to the external factors and internal factors, the external factors, the role of air, water, temperature, and biology; the internal cause is mainly the metabolism of the biological material itself....

In recent years, continuous vacuum freeze dryers have been explored and used at home and abroad. The continuous equipment is characterized by the production of a single product with a large output and sufficient raw materials, especially for the production of pulp and granular products. Continuous equipment is easy to implement automatic control, simplifying manual operation and management, and its main disadvantage is high cost....

When choosing a laboratory freeze dryer model, we usually consider focusing on the following parameters:...

The whole process of freeze-drying is actually the simultaneous process of heat transfer and mass transfer (steam). The heat and mass transfer rate affect the drying rate, which affects the entire freeze-drying cycle. All the factors affecting heat and mass transfer will affect. Drying rate. ...