Introduction to Liquid Nitrogen Injection Technology

The use of nitrogen injection technology in food oil not only helps to fill the internal pressure, maintain the stability of the bottle shape without deformation, and reduce the loss of finished products, but also greatly improves the deoxygenation effect of the filled product (deoxygenation rate reaches over 99.9%), enhances the product's shelf life, and extends the product's shelf life; This nitrogen deoxygenation technology is widely used in the field of edible oil. For example, during storage, oils and fats can oxidize, become rancid, and decompose, seriously affecting their edible quality and human health. Therefore, delaying oil oxidation has become a particularly concerned issue in the industry. The oxidation rate of oil is related to the amount of oxygen and partial pressure dissolved in the oil, as well as the oxygen content in the enclosed container, the volume fraction of air, and the partial pressure of air (oxygen). From this, it can be seen that for sealed oil containers, as long as the retention space inside the container is controlled and the partial pressure of oxygen in the oil in the space is reduced, the rate of oil oxidation can be controlled.

After long-term research and experimentation, our company has innovatively invented a new type of liquid nitrogen filling machine for edible beverages and oil nitrogen addition. It not only ensures a deoxygenation rate of over 99.9% (exceeding the national standard of 97%), but also guarantees the deoxygenation quality of the product and stable filling pressure. When the new type of liquid nitrogen filling machine for oil products is used, there will be no water droplets flowing into the product on the surface of the machine, and even on the entire filling equipment, there will be no water droplets, which meets the quality monitoring requirements for the filling process in food production. Our equipment adopts a precise control system, and the filling amount is calculated in milligrams, making the filling operation more accurate, with no difference in minutes or seconds, and the quality of each bottle of product can be precisely controlled.

At present, our company's liquid nitrogen injection technology serves clients in the oil and fat industry, including Yihai Kerry (Jinlongyu), Jiusan Group, Daodaoquan, Xiangchi Grain and Oil, and other companies.

Operating principle

Liquid nitrogen is first transported from the storage tank (or Dewar tank) to the filling machine through a vacuum insulated tube and then to the nitrogen injection head. The first sensor (which can also be used to improve the resolution of bottle speed sensing) detects the speed of the assembly line, and the second sensor senses the presence of the container. The system calculates the required amount of liquid nitrogen injection based on the container speed (speed automatic filling compensation function). Once the presence of the container is sensed, the filling valve is opened to inject the set amount of liquid nitrogen; The entire nitrogen injection process is controlled by a programmable logic controller, sensors, and a human-machine interface.

Main advantage

Extend shelf life - deoxygenation rate reaches over 99.9%
Eliminating Flat Bottles - Increasing Bottle Pressure to Eliminate the Problem of Flat Bottles and Maintain the Original Shape of Lightweight Bottles
Improve warehouse space utilization - increase product stacking capacity and reduce usage area
Maintain organic product quality - no need for preservatives to extend shelf life
PET bottle lightweighting - reducing the weight of PET, saving costs and environmental protection

Vacuum insulation technology

Cryovbs-200 vacuum equipment adopts cutting-edge ultra-low temperature process multi-layer winding high vacuum insulation and advanced programming logic control system, suitable for medium and low-speed production lines; The nitrogen injection head is equipped with a gas-liquid circulation self cooling system to maintain liquid nitrogen in an ultra cold single-phase state and improve the accuracy of liquid injection volume; The nitrogen injection head also has buffer injection technology to ensure that liquid nitrogen falls lightly onto the liquid surface to prevent splashing, ensuring even and stable liquid nitrogen injection.