A 6P heat pump drying and dehumidifying integrated host is equipped with a thermal insulation polyurethane drying room with a length of 5.5 meters, a width of 3 meters and a height of 2.2 meters. Each time, 6 material trucks are loaded, and each truck is loaded with 200 kg of notoginseng. 600 kg of the notoginseng is in one batch for drying.
The drying program is completed in three stages. The temperature of the first stage is 60°C and should keep for 2 hours. The drying mode does not drain moisture, and the temperature in the drying room should be raised. The notoginseng is evenly heated.
In the second stage, the temperature is set to 55 °C, the time is 12 hours, the mode is drying & dehumidification mode, and the continuous dehumidification is carried out.
Entering the third stage, the temperature is set to 65°C, the drying time is 26 hours, the drying mode is dehumidification mode, and the final relative humidity of the drying room is set to 20%.