Heat pump dryer in figs drying application

About figs

Figs (Ficus carica Linn) has sweet taste and seedless, containing malic acid, Citric acid, Lipase, Protease, etc.,

which can help to digest food and promote appetite, and because it contains a variety of lipids, it has the effect of embellish aperient bowel function.

However, water content of fresh figs is more than 70%, it is not easy to preserve, and mostly replaced by dried or made into preserved fruit for sale.

Traditional Figs -drying process

Coal as fuel or electric heating air to dry the figs is one of the traditional drying process. Due to the temperature, humidity and air circulation cannot be effectively controlled, resulting in high energy consumption and labor cost, also, drying quality is not guaranteed

Moreover, the hygiene of drying process cannot meet the requirements of food production.

Heat pump dryer in figs drying process features

Heat pump dryer absorb the heat from the moisture in exhaust hot air, and then release these heat in condenser to heat the drying air again. Only compressor power is request that means power consumption is few.

Unique drying chamber with no dead angle air circulation design is to ensure figs heated evenly, all figs at the same time to be drying process, improving the quality of figs of full shape, dry thoroughly, safe and hygienic, greatly extend the shelf life of figs

Figs Heat Pump Drying Process

Fresh fig moisture content is as high as 78%; selection, cleaning and slicing

are some necessary pre-drying process to ensure the quality of dry goods

Recommended figs heat pump drying process as follows,

Selection and washing

Select ripe figs, remove rotten figs and other impurities, and rinse with water, cut off the fig stems.

Figs slicing

Cut fig into four to six pieces to increase the contact surface between fig slice and hot air , shorten the drying time.

Spreading

Figs spreading in drying trays should be uniform, no overlap

Heating pump drying process

Pay attention that ventilation and dehumidification while temperature rising, so as to facilitate moisture evaporation.

1^st, Raise the temperature to 75℃quickly(in one hour) and keep temperature @ 75～80℃, humidity less than 50% for 4 hours, to accomplish most amounts of water evaporate in a short time.

2^nd, keep temperature @ 65～70℃, humidity less than 30% for 8 hours,

3^rd, keep temperature @ 60～65℃, humidity less than 10% for 4-6 hours. Final dried fig slices will have 14-15 moisture.

Soften

Cover the dried figs with plastic film and let them soften for 2-3 days.

Heat Pump Drying Figs Case

Note:

The whole figs without slicing will take longer to dry.

Refer to: Heat Pump Dryer Machine For Food And Vegetables

Back to: Hot Air Dryer