Drying Chinese Herbal Medicines: Advantages and Applications of Hot Air Drying

In the production of Chinese herbal medicines, the choice of drying technology directly affects the quality and efficacy of the herbs. With the advancement of technology, modern drying techniques have gradually replaced traditional sun-drying and shade-drying methods. Among these, hot-air drying technology has gained widespread attention and application due to its efficiency and stability.

Hot air drying uses hot air equipment to dry the herbs through convective heat transfer. In the drying chamber, hot air evenly passes through the surface and interior of the herbs, evaporating the moisture. The main advantages of this method include:
Fast drying speed: Hot air drying can quickly evaporate the moisture in the herbs, significantly shortening the drying time and improving production efficiency.
Less affected by weather: Unlike traditional sun-drying and shade-drying methods, hot air drying is not affected by weather and seasonal changes, allowing for all-weather production and ensuring stable supply of the herbs.
Uniform drying: With scientific hot air circulation design, hot-air drying equipment ensures that the herbs are evenly heated, avoiding uneven drying and improving the overall quality of the herbs.
Hygienic environment: The enclosed drying environment can prevent external contaminants from entering, ensuring the cleanliness and safety of the herbs.