How to Dry Litchi/Dehydrate Litchi in a Dehydrator
Introduction to litchi：
Litchi likes high temperature, high humidity and sunshine. Its heredity requires relatively low temperature in flower bud differentiation stage, sunny weather is the most favorable in flowering stage, low humidity, dry and hot weather are unfavorable for flowering and pollination. In the flowering and fruiting period, adverse weather will cause flower and fruit drop, even loss of harvest.
Litchi drying process：
1. Raw material selectionTry to choose the litchi varieties whose shell and fruit are not separated from each other after drying. At the same time, choose the seven to eight mature raw materials with large and round fruit shape, thick flesh and small core, high dry matter content, strong fragrance and light astringent taste. The shell should not be too thin. Different litchi varieties have different dry yield. Taking 100 kg of litchi dry products as an example, fresh litchi is required: Nuomici 400-450 kg; Xiangli 380-420 kg; Heiye, heli 320-360 kg.
2. Early drying stage
Heating slowly, in order to make the shell of litchi not burst, the temperature should be controlled at about 55 ℃. At this time, the humidity will not be very heavy. In addition, to make the temperature in the drying room rise as soon as possible, the humidity can be controlled at 60% for 4 hours.
3. Drying medium
At this time, the shell of litchi has been in a dry state, so the temperature can be controlled at 65 ℃, and the humidity of drying room can be controlled at 30%, and the cycle time is 8 hours.
4. Cooling period
After 12 hours of drying in this way, the appearance of litchi is very dry at this time. If the drying continues, the appearance of litchi will be too dry, and finally crack. Therefore, it is necessary to take out the litchi and cool it for five or six hours, so that the moisture inside the litchi can penetrate into the appearance, and then dry it again.
5. Late drying
The temperature can be raised to 65 ℃ and the drying time is 8-10 hours until it is completely dry.
Recommendation of litchi dryer/drying machine
Commercial 100-3000kg/h large amount of dehydration wide application and easy operation
Heat pump drying machine use the principle of inverse Carnot cycle. It absorbs low-temperature heat energy in the air, which becomes high-temperature heat energy after efficient heat collection and integration by the heat pump system, and is transported to the drying room for cyclic heating and drying of materials.It refers to exhausting the hot and humid air in the drying room directly to the outside of the drying room through dehumidification device, and then replenishing natural fresh air.
Hot air circle drying machine belongs to high temperature heat pump unit. Its working principle is: the working fluid of the heat pump is compressed by the compressor, becomes high temperature and high pressure gas, enters the condenser, condenses and liquefies the heat, and is used for air heating in the drying room. The moisture in the material is vaporized and evaporated by the form of hot air, and the evaporated water vapor is discharged by the moisture discharge system, thereby achieving the purpose of drying the drying material.
Litchi drying video：
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