Dehydrate Balsam Pear in a Dehydrator/Balsam Pear Drying Process

Jul 17, 2021

Introduction to balsam pear：

Balsam pear is widely cultivated in tropical to temperate regions of the world. Balsam pear tastes sweet and bitter. It is mainly used as vegetable. It can also be sugared. Mature pulp and aril can also be eaten. Balsam pear originated in the tropics, which requires high temperature, heat resistance but not cold resistance. In the range of 14 ℃ to 25 ℃, the higher the temperature, the more conducive to the growth and development of balsam pear plant, the earlier the fruit, the higher the yield.

Balsam pear processing steps：

The thickness of balsam pear slice should be about 3 cm. At this time, the thickness of balsam pear slice is smaller, which is conducive to the circulation of air and the uniform contact between balsam pear slice and hot air. The internal moisture migration and evaporation speed of balsam pear slice is faster, and the drying speed is faster. When the bitter gourd slice is too thick, the water evaporation is slow, the drying time is long, and the color of the dried bitter gourd is deep. When bitter gourd slices are too thin, they are fragile after drying, which affects storage and transportation.

Balsam pear drying process：

The initial moisture content of balsam pear is about 90%, and the moisture content of dried balsam pear slices is about 13%. The drying temperature of Momordica charantia L. is suitable for middle and high temperature. The drying temperature should not be too low or too high. It is suitable in the range of 45 ℃ - 65 ℃. If the temperature is too low, the drying speed is slow. If the temperature is too high, the color quality and nutritional components of bitter gourd will be greatly affected, and the tissue structure will become hard and the rehydration ability will be poor.
The influence of wind speed on drying process is more important than temperature and thickness. The suitable wind speed is 1.9-2.4 M / s. The appropriate wind speed can take away the wet air from the surface of bitter gourd slices in time and accelerate the evaporation of water on the surface of dry bitter gourd. When the wind speed is too low, the drying rate is slow. However, when the wind speed is too high, most of the heat on the surface of the bitter gourd slices is taken away by the air flow before it is transferred to the inside of the dried bitter gourd, which can not speed up the drying speed, but also cause heat loss.
In the drying process, the dehumidification and color fixing of Momordica charantia slices is to ensure its natural green color, that is, through the above appropriate temperature, wind speed, slice thickness, effective use of heat energy to achieve the purpose of rapid dehumidification, dehydration and color fixing of Momordica charantia slices, so as to avoid the change of color or internal components under inappropriate temperature and humidity parameters.

Recommendation of balsam pear 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.