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2020
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Vacuum freeze-drying technology
Vacuum freeze-drying technology is currently an excellent food drying and processing technology. Compared with common air-drying methods, freeze-dried food produced using this technology...
Vacuum freeze-drying technology is currently an excellent food drying and processing technology. Compared with common air-drying methods, freeze-dried food produced using this technology has a long shelf life, good rehydration properties, and excellent shape, aroma, taste, and nutritional components. The volume and shape of the dried food basically remain unchanged, the substance is honeycomb-like, and there is no shrinkage. Freeze dryers from freeze dryer manufacturers can be widely used in vegetables, fruits, seasonings, seafood, medical devices, pharmaceuticals, beverages, specimen collection, and other industries.
Vacuum freeze dryer manufacturers: The principle of freeze dryers from freeze dryer manufacturers: Simply put, vacuum freeze-drying is a drying method that removes water from a water-containing substance by pre-treatment, rapid freezing, and vacuum to sublimate the water from solid to gaseous state. The substance to be freeze-dried must match the temperature of the cold trap. Stainless steel cold traps are not suitable for freeze-drying substances with high acidity or alkalinity. The cold trap can be made of corrosion-resistant Teflon electrostatic spraying. A -80℃ cold trap is more suitable for freeze-drying low-ice-content materials and can be used to freeze-dry materials containing a small amount of alcohol.
Vacuum freeze dryer manufacturers: Under vacuum conditions, when water vapor is directly sublimated, the drug residue remains in the ice frame during freezing, forming a loose, porous structure similar to a honeycomb. Therefore, its volume basically does not change after drying. Before reuse, adding injection water will immediately dissolve it. This is the working principle of the freeze dryer from the freeze dryer manufacturer.
Vacuum freeze dryer manufacturers: Freeze dryer manufacturers should regularly maintain the liquefier at the bottom of the equipment to check for dust and waste, and clean it if necessary. When checking the heat exchanger, tilt the main unit and place it on a foam pad. High-pressure air can be used to clean the heat exchanger as needed. Excessive dirt in the liquefier will increase energy consumption and even damage the equipment. Avoid using it under no-load conditions as much as possible. Avoid frequent switching of the freeze dryer power switch to prevent overload relays from tripping.
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