New microwave vacuum dryer design
A new device integrating microwave drying and vacuum drying is designed. The waveguide and wave source cooling device are integrated into one, which effectively solves the two problems of uneven microwave distribution and easy damage of microwave source. The material chamber is the intersection of the microwave chamber and the vacuum chamber, so that the material can be both subjected to microwave radiation and in a vacuum environment.
The layered design of the material tray can be easily disassembled on the one hand, and the space of the material chamber can be fully utilized on the other hand. The modular cold trap design allows the cold trap to be freely loaded and unloaded according to the drying requirements, which can effectively improve the utilization efficiency of the cold trap. The microwave vacuum drying equipment is ingeniously designed, safe and reliable, and can meet the dry processing of high quality materials.
The microwave drying machine can heat the inside and outside of the material synchronously, and has the characteristics of fast drying speed and uniform drying. However, the drying temperature is generally above 70 °C, which is likely to cause gelatinization of the material. Vacuum drying allows the material to dry at a lower temperature, which protects the active ingredients of the heat sensitive material, but has a slow heat transfer rate and high drying cost.
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