Why are citrus peels suitable for cryogenic pulverization
The citrus peels are processed using a liquid nitrogen cryogenic pulverizer. This is mainly because citrus peels contain essential oils, aromatic substances, pectin, and dietary fibers. Ordinary pulverizers generate heat during high-speed operation, which may result in the loss of some volatile aromatic components and may also cause the materials to become sticky, clump together, or get clogged in the screen.
The liquid nitrogen cryogenic pulverization process reduces the temperature of the materials, making the citrus peels more brittle and easier to break, which is beneficial for improving the pulverization effect and reducing the thermal influence during the processing.
Reducing heat loss of essential oils and aroma components
Citrus peels contain volatile essential oil components. Cryogenic pulverization can reduce the temperature increase during the processing, which helps to reduce the loss of some volatile components, but the actual retention effect depends on the raw materials and the process.
Improving the pulverization effect of fibrous materials
Citrus peels contain fibers and tough tissues. After cryogenic cooling, the materials become more brittle and are easier to be pulverized into fine particles.
Facilitating the production of finer powder
For food ingredients that require fine powder, pre-treatment before plant extraction, spices, and dietary fiber products, cryogenic pulverization helps improve the processing ability of fine powder. The final fineness still depends on the equipment structure, raw material state, and classification method.
Reducing the risk of stickiness and clogging
For citrus peels containing essential oils, residual moisture, or materials that are prone to softening due to heat, cryogenic processing may improve the material flow and pulverization stability. However, the raw materials usually still need to be appropriately dried or pre-treated according to their moisture content.
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