Medical Surgical Face Mask,Anti Covid-19 Face Mask,Three-Ply Face Mask,Non Woven Medical Masks Guangdong Jia Mei Biological Technology Co.Ltd , https://www.jaymeimask.com
Chinese herbal medicine storage and processing technology
The practice of storage of Chinese herbal medicine warehouses has proved that if the water content of Chinese herbal medicines is controlled within certain limits under certain conditions, quality will not change. For example, when the temperature is 30°C in the north, the moisture content of red dates is controlled at 12% to 17%, Codonopsis 11% to 16%, bitter almond 6% to 8%, B. ginseng 12% to 15%, and Astragalus 11% to 14%. When the % is equal, no change in quality occurs during storage. This is the so-called "safe moisture" of Chinese herbal medicines. It refers to the critical moisture content that can be safely stored under certain conditions without any change in quality. Therefore, the Chinese herbal medicines harvested and processed in the autumn must be dried to the safe moisture limit in time in order to ensure the quality of Chinese herbal medicines. At present, the commonly used drying techniques for Chinese herbal medicines are the following: 1. Selenium-day method This is a common drying method for most medicinal materials. When drying, choose sunny, windy weather, spread the herbs thinly on the mat or on the cement floor, use daylight lighting, and pay attention to turning in time to ensure even sunlight. After the autumn night, the air has high humidity, and it is necessary to pay attention to retracting and picking up the medicine to prevent it from returning moisture. Second, the airing method This method is also called shade dry method, that is, the herbs are placed in the indoor or greenhouse shade, the use of flowing air, blowing water to achieve the purpose of drying. This method is often used in rainy weather, or used in medicines containing volatile oils and oils that are easy to take off and change color, such as Zaoren, Boziren, Anemarrhena, Bitter Almond, Codonopsis, Asparagus, Hemp and so on. These herbs should not be exposed to sunlight, but they can be aired in places with less sunlight or shaded areas to prevent oil and deterioration. Third, the drying method This method is a traditional, simple and economical method of drying herbs. The application of the law must be preceded by one or several rectangular fire pots in the room or greenhouse, the fire pot width of about 1.5m, the length can be determined according to the number of herbs, under the fire to every 80cm left to open a small door to switch to add fuel. Then place a stove in it. An iron plate is needed at the crater of the stove to raise the fireproof seedlings, destroy the herbs, and disperse the heat. When the barrier reaches 1.2~l.5m high, a round steel pipe with a diameter of 3~4cm is horizontally placed every 60cm, a metal wire mesh is laid on the steel pipe, the wire mesh is covered with mud, and then the fire is added from the mud. 60cm high can be. Finally, the stove is lit, and the fire pods and the covered mud are dried. The herbs are placed in the gutter in accordance with the first and second level. However, they should not be overfilled. Thickness of 30 to 40 cm is appropriate. Covered with sacks, straws, etc. . When a large amount of steam rises, it is necessary to open the sack or straw curtain in time, and pay attention to flipping up and down the herbs until it is dry. This method is applicable to the drying of medicinal materials such as Chuanxiong, Alisma, and Platycodon. Drying process should pay attention to the control of the heat, so as not to coke the medicine, but also according to the nature of the medicine and the degree of desiccation requirements are treated separately, and some herbs should not be dried with drying method. Fourth, drying room and drying machine drying method This method is suitable for large-scale use of medicinal planting base, and high efficiency, labor force, provincial expenses, not limited by the weather, but also play the role of insecticide, temperature Controllable, suitable for all kinds of medicinal materials, does not affect the quality of medicinal materials, is a more advanced method of drying. However, it is necessary to pay attention to the construction of drying rooms and the purchase of special drying machines in accordance with the technical requirements and standards of the specifications, and they should be operated by professionals who are familiar with drying techniques. Also note that the drying temperature and time are controlled according to the different properties of the herbs. 5. Far-infrared heating and drying method This is a new drying technology. Its drying principle is to convert electric energy into far-infrared radiation, which can be absorbed by the molecules of the medicinal material, generate resonances, cause the vibration and rotation of molecules and atoms, and cause objects to change. Heat, after thermal diffusion, evaporation, and chemical changes, eventually reaches the goal of drying. Ziren fruit rice can be dried by this method. Far-infrared drying can save 20% to 50% of electric energy, and the effect is good. Six, microwave drying method This is a new technology developed rapidly in the 1960s. Microwave drying actually uses induction heating and medium heating to make the moisture and fat in Chinese herbal medicines absorb microwave energy in different degrees and take it It is converted to heat for drying purposes. Microwave drying can kill microorganisms and molds, and has a disinfectant effect, so that the medicinal materials can reach the hygiene standards and can prevent molds and insects from being produced during storage. At present, China's production of microwave heating equipment has two frequencies of 915mhz and 2450mhz.