The cultivation of Chinese herbal medicines is now an important industry supported by China. However, the storage of Chinese herbal medicines is a difficult problem. If the Chinese herbal medicines after harvesting are not dried to a safe moisture limit, the quality of Chinese herbal medicines in the storage process is difficult to guarantee.
For example, when the temperature is 30 °C in the north, the water content of Codonopsis pilosula is controlled at 11% to 16%, bitter almonds 6% to 8%, northern sand ginseng 12% to 15%, and astragalus 11% to 14%. This is the so-called "safe moisture" of Chinese herbal medicines. It refers to the critical water content that can be safely stored under certain conditions and the quality does not change.
At present, the commonly used methods for drying Chinese herbal medicines are as follows:
First, drying method This is a drying method commonly used in most medicines. When drying, you should choose sunny, windy weather, spread the medicine on the banquet or on the concrete floor, use the daylight illumination, and pay attention to turning it in time to ensure even sunlight. After the autumn, the air humidity is high, it is necessary to pay attention to the medicine and put it back to prevent the tide.
Second, the dry method This method is often used in rainy weather, or used in medicines containing volatile oils and medicinal materials that are easy to remove oil and discolor, such as Zaoren, Baiziren, Zhimu, bitter almond, Codonopsis, Asparagus, and Hempen. These medicinal materials should not be exposed to the sun. They can be spread in places where the sunlight is not strong or in a cool and ventilated place to avoid oil and deterioration.
Third, drying room drying method This method is not limited by the weather, can play the role of insecticide and mildew. However, care should be taken to construct the drying room in accordance with the technical requirements and standards of the specification, and to be operated by professionals familiar with the drying technology. Also pay attention to control the drying temperature and time according to the different properties of the medicine.
4. Far-infrared heating and drying method The principle of drying is to convert electric energy into far-infrared radiation, which is absorbed by the molecules of the medicinal materials, causing resonance, causing vibration and rotation of molecules and atoms, causing the objects to heat up, through thermal diffusion, evaporation and chemistry. Change, zui finally achieves the purpose of drying.
V. Microwave drying method This is a new technology developed rapidly in the 1960s. Microwave drying is to absorb microwave energy by varying degrees of moisture and fat in Chinese herbal medicines by induction heating and medium heating, and convert it into The heat thus achieves the purpose of drying. Microwave drying can kill microorganisms and molds, and has a disinfecting effect, so that the medicinal materials meet hygienic standards, comply with GMP certification, and prevent mold and insects during storage.
At present, Henan Boda Microwave Equipment Co., Ltd. is a microwave manufacturer with strong technology in the field of industrial microwave. The microwave drying equipment produced by the company has won many awards, such as industrial energy-saving products of Henan Province, second prize of Zhengzhou City, and scientific and technological achievements. Awards, etc., and cooperation with major pharmaceutical companies, won the praise of customers.
For example, when the temperature is 30 °C in the north, the water content of Codonopsis pilosula is controlled at 11% to 16%, bitter almonds 6% to 8%, northern sand ginseng 12% to 15%, and astragalus 11% to 14%. This is the so-called "safe moisture" of Chinese herbal medicines. It refers to the critical water content that can be safely stored under certain conditions and the quality does not change.
At present, the commonly used methods for drying Chinese herbal medicines are as follows:
First, drying method This is a drying method commonly used in most medicines. When drying, you should choose sunny, windy weather, spread the medicine on the banquet or on the concrete floor, use the daylight illumination, and pay attention to turning it in time to ensure even sunlight. After the autumn, the air humidity is high, it is necessary to pay attention to the medicine and put it back to prevent the tide.
Second, the dry method This method is often used in rainy weather, or used in medicines containing volatile oils and medicinal materials that are easy to remove oil and discolor, such as Zaoren, Baiziren, Zhimu, bitter almond, Codonopsis, Asparagus, and Hempen. These medicinal materials should not be exposed to the sun. They can be spread in places where the sunlight is not strong or in a cool and ventilated place to avoid oil and deterioration.
Third, drying room drying method This method is not limited by the weather, can play the role of insecticide and mildew. However, care should be taken to construct the drying room in accordance with the technical requirements and standards of the specification, and to be operated by professionals familiar with the drying technology. Also pay attention to control the drying temperature and time according to the different properties of the medicine.
4. Far-infrared heating and drying method The principle of drying is to convert electric energy into far-infrared radiation, which is absorbed by the molecules of the medicinal materials, causing resonance, causing vibration and rotation of molecules and atoms, causing the objects to heat up, through thermal diffusion, evaporation and chemistry. Change, zui finally achieves the purpose of drying.
V. Microwave drying method This is a new technology developed rapidly in the 1960s. Microwave drying is to absorb microwave energy by varying degrees of moisture and fat in Chinese herbal medicines by induction heating and medium heating, and convert it into The heat thus achieves the purpose of drying. Microwave drying can kill microorganisms and molds, and has a disinfecting effect, so that the medicinal materials meet hygienic standards, comply with GMP certification, and prevent mold and insects during storage.
At present, Henan Boda Microwave Equipment Co., Ltd. is a microwave manufacturer with strong technology in the field of industrial microwave. The microwave drying equipment produced by the company has won many awards, such as industrial energy-saving products of Henan Province, second prize of Zhengzhou City, and scientific and technological achievements. Awards, etc., and cooperation with major pharmaceutical companies, won the praise of customers.
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