Overlord flower dryer is a commonly used drying equipment. Today, we will introduce the drying process steps of overlord flower.
The first stage
Place the picked and sorted Overlord flowers evenly on the material frame. Only when the initial temperature of the drying room is raised to about 55 degrees can the flowers be pushed into the drying room. Dry bulbs were set at 55°C and wet bulbs were set at 38°C. The room temperature should be keep for 4–6 hours, afterwards the flower will enter into a softening period.
The second stage
The temperature of the drying room should be gradually increased from 55 degrees to 60 degrees for dry bulbs, and increased from 38 degrees to 42 degrees for wet bulbs. The heating up time should be controlled within 2 hours and cannot the temperature cannot exceed 60 degrees. After initial, moderate drying and strong dehumidification process for 9-12 hours, the overlord flower basically could reaches 70% dryness.
The third stage
The heating stage of the dry bulb, from 55-60°C, is controlled for 4-6 hours . In this stage, the wet bulb temperature is set at 46°C to facilitate the temperature increase. After the third stage, the overlord flower could basically reaches 80% dryness.
The fourth stage
For the mandatory drying period, the temperature of the dry bulb is set to 75°C, and the wet bulb’s temperature is set to 50°C. The temperature should not exceed 80°C. After 2-4 hours, the moisture content of the overlord flower is about 12%. After the overlord flower is dried and colored, the flower could be released out of the drying room. The advantages of heat pump dryers are intelligent temperature control and automatic moisture removal. The average disposal cost for per kilo of dried flowers is about 10 cents.
The drying time of the overlord flowers is generally 18-20 hours, and the longest drying time can reach to 30 hours. The drying time is related to the thickness of drying tray and the water amount in the overlord flowers. There are also several differences if it is different type of overlord flower. According to the test, if the whole flower has not been cut, the drying time will exceed 48 hours. If the flower is cut into multiple pieces, then the drying time is shortened to about 24 hours. The drying time of the overlord flower in rainy season is about 10-20% longer than that in non-rainy season.