Application of heat pump and microwave combined drying in medicinal materials drying (2)
Research progress of heat pump microwave combined drying technology
The drying process requires a lot of time and a lot of energy, and reducing energy consumption and time during the drying process is a major issue for research. There are certain disadvantages when using the conventional drying method. First, it takes a long time to dry naturally or dry, and the efficiency is extremely low.
At present, hot air drying is widely used, but high temperature is required when drying. Chinese medicinal materials are heat-sensitive plants, which are prone to deterioration at high temperatures and affect their performance. With the increasing international status of Chinese medicinal materials, its storage and quality requirements are getting higher and higher. In order to improve the competitiveness of Chinese medicinal materials in the international market, it is imperative to study new drying technologies.
Under normal circumstances, the content of water in Chinese herbal medicines is relatively high, and its heat sensitivity and degradability are also relatively high, so dehydration of Chinese herbal medicines is a very good way to improve their storage time.
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