Drying is an important part in the production of traditional Chinese medicine. It is widely used in the production of pharmaceutical excipients, APIs, intermediates and finished products, especially the drying of traditional Chinese medicine extracts. Its operation directly affects the performance, quality, appearance and cost of the products. At present, the drying of extracts mainly relies on traditional drying equipment such as hot air circulation type ovens and vacuum drying boxes. In recent years, new drying technologies such as spray drying, vacuum freeze drying and microwave vacuum drying have been promoted and applied in the drying process of traditional Chinese medicine extracts. .
Due to the high viscosity and poor gas permeability of traditional Chinese medicine extracts, the drying process of traditional Chinese medicine extract drying technology has the disadvantages of long drying time, low yield, high energy consumption, low production efficiency and low product quality, which is far from satisfying the modernization of traditional Chinese medicine. Requirements for high efficiency, energy saving, environmental protection and advanced Chinese medicine extract drying process.
The microwave vacuum drying equipment that has emerged in recent years can effectively solve the problem of drying of traditional Chinese medicine extracts. The particles obtained after drying by a microwave vacuum dryer have micropores inside from the microscopic structure. After directly pulverizing to the required particle size, the flowability of the particles is very good, and it can be directly compressed or filled with capsules. At the same time, since the particles have a microscopic loose structure, the instant solubility is excellent, and the appearance of the particles is good, for instant dissolution (granules). Products can greatly improve the grade of the product. The entire drying process is completely closed, not in contact with the external environment, in line with GMP.
Features of traditional Chinese medicine extract microwave vacuum drying equipment: (1) low drying temperature, suitable for drying heat sensitive traditional Chinese medicine extract; (2) suitable for drying and easy oxidation of traditional Chinese medicine extract; (3) suitable for drying high concentration, high viscosity Chinese medicine dip (4) The product has good solubility. After drying, the material has micropores inside the microstructure. After directly pulverizing to the required particle size, the fluidity of the particles is very good, and the particles have microscopic loose structure. , fast solubility; (5) during the drying process, the product is always under vacuum, reducing product oxidation and making the material difficult to paste. Zui maintains its original color, aroma and taste to a high degree, and obtains high quality zui end products.
Vacuum microwave equipment is a new concept of efficient, energy-saving, environmentally friendly drying equipment. It has been successfully applied to the drying of Salvia miltiorrhiza extract, Sanqi extract, Angelica extract and food malt, coffee, milk powder, etc., and has achieved good results. For foods, because of its short drying time, low temperature, no oxidation in vacuum, and good retention of fragrance; in the pharmaceutical field, it has good retention activity for some active substances, API, heat sensitive substances, vitamins, aromatic substances, etc. And the role of the fragrance.
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