Liquid nitrogen freezing technology in the food

    Among the many preservation methods, cryopreservation is the most widely used and the effect is very obvious. Among the many preservation methods, cryopreservation is the most widely used and the effect is very significant. As one of the cryopreservation methods, liquid nitrogen quick-freezing has long been adopted by food processing enterprises. Because it can realize ultra-quick freezing at low temperature and deep freezing, it is also conducive to the partial vitrification of frozen food, so that the food can be restored to the original fresh state and original nutrients to the greatest extent, and the quality of frozen food is greatly improved. Therefore, it shows unique vitality in the quick-frozen industry. Compared with other freezing methods, Guangzhou Extreme Liquid Nitrogen Quick Freezer has the following obvious advantages: the freezing speed is fast (the freezing speed is about 30-40 times faster than the general freezing method)：It adopts liquid nitrogen quick freezing, which can make food quickly pass through the maximum ice crystal generation zone of 0~5 °C. Guangzhou liquid nitrogen quick freezing experts have made useful attempts in this regard.
    Maintain food quality: Due to the short freezing time of liquid nitrogen, the food frozen by liquid nitrogen can keep the color, aroma, taste and nutritional value before processing to the greatest extent. Duan Zhenhua and other people used liquid nitrogen to quickly freeze betel nut, and the results showed that the betel nut treated with liquid nitrogen maintained a high chlorophyll content and had a good flavor.
  Low material consumption: the loss rate of general freezing is 3%, while liquid nitrogen quick freezing can be reduced to 0.25~0.5%.The equipment and power costs are low, and it is easy to realize mechanization and automatic assembly line, and improve productivity.
  At present, liquid nitrogen quick freezing mainly includes spray freezing, immersion freezing and cold air freezing. Among them, spray freezing is the most widely used.