Passed the ISO9001 quality system certification and the establishment of industrial drying industry alliance standards under the guidance of the Chinese Standardization Research Institute.
- May 08, 2019 -
(2) Spread-drying method
is also called shade-drying method, which places medicinal materials in the shade of indoor or greenhouse, and uses the flowing air to blow away water to achieve the purpose of drying. This method is often used in cloudy and rainy weather, or in medicinal materials containing volatile oil, as well as in medicinal materials which are easy to walk and discolor, such as jujube kernel, cypress seed, Anemarrhena asphodeloides, bitter almond, Codonopsis pilosula, asparagus, hemp seed, etc. These medicinal materials should not be exposed to the sun, but can be spread out in places where the sun is not strong or where the wind is cool, so as to avoid oil and deterioration.
(3) Baking method
This method is a traditional, simple and economical method for drying medicinal materials. In order to apply this method, one or more rectangular fire kangs with a width of about 1.5 meters and a length depending on the amount of medicinal materials should be built in the interior of the indoor or greenhouse in advance. Under the fire kang, a small door can be left every 80 centimeters to add fuel. Then a stove was placed in it, and an iron plate was erected at the entrance of the stove to raise the fire seedlings. Destruction of medicinal materials, but also can disperse heat. When the bay is 1.2-1.5 meters high, every 60 centimeters a circular steel pipe with a diameter of 3-4 centimeters is laid across the steel pipe. The wire mesh is laid on the top of the steel pipe and then covered with mud. Then the baking fire is raised by 60 centimeters from above the mud. Lastly, light the stove, dry the fire and mud covered, and place the medicinal materials in the Kang trough according to the first big and then small levels, but not too full. It's better to be 30-40 cm thick, with sacks and straw curtains covered on it. When a large amount of steam rises, it is necessary to open sacks or curtains in time, and pay attention to turning medicinal materials up and down until drying. This method is suitable for the drying of Ligusticum chuanxiong, Alisma orientalis and Platycodon grandiflorum. In the drying process, we should pay attention to the temperature so as not to scorch the medicinal materials, and treat them separately according to the nature of the medicinal materials and the requirement of drying degree. Some medicinal materials should not be dried by drying method.
(4) Drying method of oven and dryer
This method is suitable for large-scale medicinal material planting base, and has high efficiency, labor-saving, cost-saving, not limited by weather, insecticidal and mildew-repellent effect, temperature controllable, suitable for all kinds of medicinal materials, without affecting the quality of medicinal materials. It is an advanced drying method. However, attention should be paid to the construction of drying rooms and the acquisition of special drying machinery in accordance with the technical requirements and standards of the specifications, which are operated by professionals familiar with drying technology. In addition, the drying temperature and time should be controlled according to the different properties of medicinal materials.