The technical level of drying and drying of traditional Chinese medicinal materials is relatively backward, especially in the drying and processing of traditional Chinese medicinal materials, the use of coal-fired drying and baking, or the original processing methods such as sulfur fumigation and drying, lead to pollution of medicinal materials and excessive sulfur content. This will more or less affect the medicinal value of Chinese herbal medicines. Therefore, it is necessary to improve the current technology in order to preserve the effective substances and active ingredients of Chinese medicinal materials as much as possible, and to exert various medicinal effects of their application.
Influencing factors of drying and drying of Chinese herbal medicines.
(1) Types and characteristics of Chinese medicinal materials, including roots, stems, leaves, fruits, seeds, skins, etc. The shape, size, thickness, texture, composition and other factors of Chinese medicinal materials all affect the drying process of Chinese medicinal materials.
(2) Preliminary treatment of Chinese medicinal materials before drying, such as washing, fixing, slicing or cutting, cooking, soaking, etc. (different Chinese medicinal materials have different preliminary pretreatment due to their different characteristics)
(3) The drying temperature for drying Chinese medicinal materials, according to different materials, while ensuring the drying quality of Chinese medicinal materials, try to choose a high drying temperature to speed up the drying speed, and the initial moisture content of Chinese medicinal materials is also affected by drying. drying speed effect.
(4) Selection of drying speed and drying method for Chinese herbal medicines. The drying of Chinese herbal medicines should be controlled under certain technical parameters such as temperature, humidity, and wind speed of the circulating fan in the drying room. In order to ensure the maintenance of the medicinal components of the Chinese herbal medicines during the drying process.
(5) The placement method, stacking thickness, and placement method of the Chinese medicinal materials affect the drying speed. The stacking thickness of the Chinese medicinal materials should be reasonably controlled, and the heat exchange area and ventilation volume of the Chinese medicinal materials should be increased, thereby speeding up the drying speed.
(6) In principle, when drying Chinese medicinal materials, a single variety is required, and multiple varieties of Chinese medicinal materials cannot be mixed together for drying.
(7) The dried Chinese medicinal materials should be sorted, packaged and stored in time to prevent their resurgence.
For ginseng, Tianma, Codonopsis, Astragalus, Rhodiola, Ganoderma lucidum, etc., the high-temperature air heat pump drying process is used to ensure the quality of the dried medicinal materials. Compared with the traditional method, the drying efficiency (yield) is increased by 50%.
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