Chinese herbal medicine to teach you how to dryness and drying technology used
Chinese herbal medicine has proved warehouse storage , if under certain conditions , the water content of the medicines control within certain limits , the quality will not become distorted . Here are some specific related presentations .
If the temperature is 30 ℃, the north , the water content of the dates in the 12% to 17% , from 11% to 16% Codonopsis , bitter almonds 6% to 8% , littoralis 12% to 15%, from 11% to 14 Astragalus % , etc., during storage does not occur in the quality changes. This is known as herbal medicines "safe water ", which refers to certain conditions, be able to make it safe storage , quality is not critical moisture content mutation occurred .
Therefore, after the fall harvest processing of Chinese herbal medicines , must be promptly dried to safe moisture limits in order to ensure the quality of medicines . Currently, Chinese herbal medicines commonly used in drying technology are the following:
One , day selenium France
It is most commonly used as a drying method herbs . Drying , should choose sunny, windy weather , the herbs on a thin reed mat spread on the concrete floor or the use of daylighting , while attention should be turning to ensure uniform sunlight . Autumn night , air humidity, pay attention to the medicine away properly to prevent damp .
Second, Airing France
The Act also called dry method, about herbs indoors or in greenhouses placed in the shade , use the flow of air , blow away moisture to achieve the purpose of drying . The method commonly used in rainy weather , or for containing volatile oils of the herbs as well as easy to take the oil , discoloration of herbs, such as Zao , Bozi , Anemarrhena, bitter almond , Codonopsis , aspartame , hemp seed and so on. These medicines should not be exposure, are available at the place is not too strong sunlight or shade Airing avoid walking oil deterioration.

Three , bake kang France
This method is a traditional , simple and economical method of drying herbs . Application of the law to advance in the indoor or greenhouse base one or several rectangular kang , kang width 1.5m, length can be set according to how much medicine , kang every 80cm below can switch left a small door in order to add fuel . Then in which to place a stove burner stove to stand at an iron , to prevent rising flames , destroying medicine, but will also disperse heat. Kang barrier to 1.2 ~ l.5m high, 60cm horizontally one every 3 ~ 4cm in diameter round steel tube , pipe laying above the wire mesh, wire mesh above and then covered with mud , and then from the mud above plus kang height 60cm can be. Finally lit the stove , covered with mud and the kang drying the herbs according to the level of the first big small place kang tank , but do not overfill to appropriate 30 ~ 40cm thick and covered sacks, straws , etc. . There are a lot of steam emerge , we must promptly opened the sack or straws , and note down flip herbs until kang dry up .
The Act applies to root, Alisma, bellflower dried herbs . Drying process should pay attention to master the furnace , so the herbs kang coke, but also according to the nature and medicinal requirements for the degree of drying treated separately , and some herbs should not use baking kang drying method .
Fourth, drying room and a drying machine drying method
The method is suitable for large-scale use of herbs planting bases and high efficiency, saving labor , saving costs , regardless of the weather constraints, can also play insecticidal effect of flooding mold temperature control , suitable for all kinds of herbs, not affect the quality of medicine , is a more advanced method of drying . But pay attention to the technical specifications in accordance with the requirements and standards for the construction and purchase of special drying machine drying room , by the familiar drying technology professionals to operate . Also note that according to the different nature of herbs control the drying temperature and time.
Fifth, the far-infrared heating and drying method
This is a new drying techniques , drying principle is the electrical energy into far infrared radiation , so as to be absorbed medicinal molecules , resonance , causing the atoms and molecules and rotational vibration , causes objects to become hot , heat diffusion , evaporation and chemical changes , and ultimately achieve the purpose of drying . Seeds Fruit meters herbs can be dried using this method . Far infrared drying can save power 20% to 50 % better.
Six , microwave drying
This is a rapid development of the 1960s, the new technology , microwave drying is actually by induction heating and dielectric heating, water and herbs in varying degrees of fat absorb microwave energy and turn it into heat so as to achieve drying purposes . Microwave drying can kill microbes and fungi , and has a disinfecting effect, so herbs meet health standards , and to prevent moldy during storage herbs and vermin . At present our production of microwave heating equipment has two frequencies 915MHz and 2450MHz .

 

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