The microwave dryer is different from the traditional drying method in that the heat conduction direction is the same as the moisture diffusion direction. Compared with the traditional drying method, it has the advantages of large drying rate, energy saving, high production efficiency, uniform drying, clean production, easy realization of automatic control and improvement of product quality. At the same time, it also has the advantages of killing, sterilization and other characteristics, so it is favored by customers.
The traditional medicinal material drying machine is designed to use coal as fuel for combustion to generate clean hot air as a drying medium to absorb the moisture in the Chinese medicine, drain out the moist air that reaches a certain amount of moisture, and circulate back and forth to reach the moisture required by the traditional Chinese medicine. The characteristics are time-consuming, laborious, unable to fully meet the requirements for medicinal drying, and poor sterilizing properties, coupled with the use of coal as a fuel to pollute the environment. Therefore, the emergence of new process technology becomes extremely necessary. The appearance of microwave technology satisfactorily met the requirements for drying and drying medicinal herbs, and coincided with the current theme of environmental protection.
The microwave medicine drying machine retains the most effective drug ingredients in Chinese herbal medicines. Microwaves can also kill various molds and eggs in herbs to prevent mildew and insects from being produced during storage. All this is because: Microwave heating is to make the object to be heated itself a heating element, which is called an integral heating method and does not require a heat conduction process, so that uniform heating can be achieved in a short time.
This feature allows the material with poor heat conduction to be heated and dried in a short time, the energy utilization rate is improved, and the size of the heating furnace can also be made smaller than the conventional heating furnace. At the same time, when the material under the microwave electromagnetic field, the overall temperature of the material rises. At this point, due to evaporation of moisture on the surface of the material, the surface temperature decreases, resulting in a high temperature gradient inside and outside, the direction of this gradient coincides with the direction of moisture evaporation. Therefore, high efficiency and good effect!
Through years of efforts, the level of development and production of microwave drying equipment in China has been greatly improved. Design has become more reasonable, quality has been improved, costs have been gradually reduced, and automation and after-sales services have improved. Users of microwave drying equipment have seen an accelerated growth in recent years.
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