How To Efficiently And Economically Use Yingtai Laboratory Freeze Dryers?

How To Efficiently And Economically Use Yingtai Laboratory Freeze Dryers?

Currently, freeze-drying technology is widely used in various fields such as pharmaceuticals, biological products, food, active substances, and nanomaterials. Small laboratory freeze dryers are now included in the R&D and testing applications of higher education institutions and corporate laboratories. They are applied in scientific research for biopharmaceuticals and cosmetics, experimental R&D in the food and traditional Chinese medicine industries, and industrial research experiments involving nanomaterials and chemical materials.

Improving the Energy Efficiency of Laboratory Freeze Dryers

1. Control of Ice Point Vacuum Drying Method:

  - The ice point vacuum drying method in laboratory freeze dryers leverages the advantages of both freeze-drying and vacuum drying. By strictly controlling the food temperature to be close to the ice point without freezing, it not only saves refrigeration energy consumption but also avoids heat denaturation issues in food and damage to biological cells during the phase change process.

2. Modification of the Material Tray Structure:

  - The material tray can be improved in terms of the thermal conductivity of the tray material and the heat transfer surface contact between the tray and the material. Selecting materials with good thermal conductivity can effectively enhance the freeze-drying process.

3. Control of Pre-freezing Speed and Material Tray Load:

  - Research on the vacuum freeze-drying process of laboratory freeze dryers has found that pre-freezing speed affects ice crystal formation. A faster freezing rate results in smaller ice crystals, which is unfavorable for sublimation and leads to longer dehydration times but faster dissolution after drying. Conversely, a slower freezing rate produces larger ice crystals, beneficial for drying and dehydration but resulting in slower dissolution after drying. Additionally, the thinner the material layer on the unit area of the tray, the faster the heat and mass transfer, and the shorter the drying time. However, thinner material layers mean fewer materials dried per batch per unit freeze-drying area, which is not conducive to improving the yield per unit freeze-drying area and time. Therefore, choosing an appropriate material tray load and cooling rate can reduce energy consumption.