After the vacuum freezing and drying equipment is turned on, the materials are put into the material box for freezing. The freezing process of the material. On the one hand, the vacuum system is used to pull a part of the water away from the vacuum; on the other hand, when the material is frozen, the moisture contained in some molecules is discharged to the surface of the material and frozen. After reaching the freezing requirement, the material is heated and dried by the heating system, and the water contained in the material is brought into the freezing trap box through vacuum to freeze the material to achieve the requirements of freeze drying of the material.
When the device is lyophilized, it is necessary to maintain the good quality of the product while achieving a faster drying rate. The latent heat required for sublimation must be transferred from the heat source through the external heat transfer process to the surface of the material to be dried, and then transferred through the internal heat transfer process to the actual occurrence of ice sublimation within the material. The generated water vapor must reach the surface of the material through an internal mass transfer process and be transferred to a vapor trap (cold trap) through an external mass transfer process.
Any one process or several processes together may become the “bottleneck†of the drying process, which depends on the design of the freeze drying equipment, the operating conditions, and the characteristics of the material being dried. Only at the same time improve the heat transfer, mass transfer efficiency, increase the surface area per unit volume of freeze-dried material, can achieve faster drying rate.
At present, the development prospects of the entire pharmaceutical machine industry are very broad . The same applies to the drying equipment industry. However, it is worth noting that the investment cost of the industry is also high. Therefore, manufacturers must follow the trend of development and strengthen the vacuum. Freeze drying equipment.