Ginseng is a perennial herb, and its roots are Chinese herbal medicines, which have the functions of nourishing yin and clearing heat, moistening the lungs and resolving phlegm, benefiting the stomach and promoting body fluid. Commonly used for chronic cough due to yin deficiency, pulmonary tuberculosis with phlegm and blood, dry cough with little phlegm, deficiency heat, sore throat and thirst. Processing method of ginseng: take the original medicinal materials, remove impurities and cane heads, wash, moisten thoroughly, thick slices, and sun-dried. In the production process, drying technology is very important.


 
Nowadays, the drying of Chinese herbal medicines mostly uses air energy heat pump dryers. During the drying process, the equipment can accurately and effectively control temperature, humidity and circulating air flow, and use scientific drying curves and dehumidification curves to ensure drying. Dry ginseng has good quality, good color and high product grade. It not only effectively retains a variety of psoralen, citrus lactone, xanthotoxin and other nutrients contained in the ginseng, but also shortens the drying cycle and improves the appearance of the dried product, thereby increasing the price of the finished product.
 
Processing steps:
 
Step 1: Choose
 
Spread the medicinal materials of S. ginseng on the material selection table, and pick out the impurities that cannot be used as medicine, or the parts that have deteriorated and failed, such as moth-eaten, moldy, etc., according to the thickness and size.
 
Step 2: Smooth
 
The ginseng is put into the sink to soften and soak according to the size. Soak with water every 20-30 minutes until the drug is fully penetrated, smooth and easy to cut.
 
Step 3: Cut
 
When slicing, pay attention to the distance of the blade and the sharpness and dullness of the blade, and adjust the distance and sharpening of the blade in time to reduce the occurrence of bad film. The cut short pieces should be placed in a clean container, and can be made into short pieces (5-10 mm) to be sun-dried, or the whole root can be sun-dried.
 
Step 4: Dry
 
Put the ginseng on the baking tray, the medicinal materials should be flattened, and the thickness of the tray should be controlled at 2-3 cm. Put the baking trays into the material cart layer by layer, push the material cart into the drying room, energize the heat pump dryer, operate the dryer controller, select the drying mode, set the drying temperature, drying time, relative to the drying room. Humidity and other drying process parameters, close the door of the drying room, press the start button of the dryer, the heat pump dryer will continuously send hot air to the drying room, and the drying process of ginseng is mainly completed in four stages:
 
The first stage: select the drying + dehumidification mode, the drying temperature of ginseng is 50 degrees, the relative humidity of the drying room is 30%, the return temperature is 3 degrees, and the humidity is dehumidified every 60 minutes for 8 minutes each time.
 
Continuous drying for 5 hours;
 
The second stage: select the drying + dehumidification mode, the drying temperature of ginseng is 60 degrees, the relative humidity of the drying room is 20%, the return temperature is 3 degrees, and the humidity is dehumidified once every 60 minutes, 8 minutes each time,
 
Continuous drying for 5 hours;
 
The third stage: select the drying + dehumidification mode, the drying temperature of ginseng is 75 degrees, the relative humidity of the drying room is 20%, the return temperature is 3 degrees, and the humidity is dehumidified every 60 minutes, every 8 minutes,
 
Continuous drying for 7 hours;
 
The fourth stage: select the drying + dehumidification mode, the drying temperature of ginseng is 70 degrees, the relative humidity of the drying room is 20%, the return temperature is 3 degrees, and the humidity is dehumidified every 60 minutes for 8 minutes each time, until the ginseng contains water. When the drying rate drops to 11%, the drying can be completed. Turn off the heat pump dryer, open the door of the drying room, turn off the fan when the temperature of the drying room drops to normal temperature, and push the material cart containing ginseng out of the drying room and place it in the drying room. Allow the area to cool before packing.