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Your Location: Home >> News >> Technical support >> Freeze-drying process of fresh red dates of food vacuum freeze dryer

Freeze-drying process of fresh red dates of food vacuum freeze dryer

Release Date: 2018/12/29 17:08:48 .
Browse: 680

Freeze-drying process of fresh red dates of food vacuum freeze dryer

The application of food vacuum freeze dryer on fresh red dates, the smaller the ice crystal formed by the internal water, the smaller the damage to the fresh jujube structure. After lyophilization, the fresh dates can maintain the original flavor and characteristics. Not only the nutrients and tastes are unchanged, but also the shape of the dried red dates is not shrinking, and the dry products are no different from the fresh ones.

Food freeze dryer: freeze-drying process of fresh red dates:

1. Pre-freeze the denucleated fresh dates at -15 ° C ~ -40 ° C for 1 to 5 hours.
2. The pre-frozen fresh jujube is placed in the cold trap of the extension food freeze-drying machine, and is continuously frozen for 0.5 to 2 hours at -25 ° C to -55 ° C.
3. Freeze fresh dates into the drying chamber of the food freeze dryer, adjust the temperature of the heating plate to 50 °C ~ 70 °C, vacuum, maintain the vacuum of the drying chamber 30 ~ 80pa, and control the temperature of the cold trap -40 ° C ~ -55 ° C After drying for 9 to 14 hours, freeze-dried dates were obtained. (If you need fresh jujube chips, slice the red dates and freeze them)

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