Liquid Nitrogen Dosing Solution

Product Overview

The liquid nitrogen dosing solution is a low-temperature dosing system designed for beverage and food filling production lines. It is widely used in industries such as carbonated beverages, beer, juice, milk, and edible oils.

The system precisely injects a small amount of liquid nitrogen into bottles or cans before sealing. As the liquid nitrogen rapidly vaporizes, it creates stable internal pressure inside the container. This process enhances container structural strength, extends product shelf life, and improves overall packaging quality.

The system can be seamlessly integrated with automated filling lines to enable stable and efficient continuous production. At the same time, it helps reduce liquid nitrogen consumption and improve overall production efficiency.

Working Principle

The liquid nitrogen dosing system utilizes the property of liquid nitrogen to rapidly vaporize at ambient temperature. A precise dosing device injects a micro-quantity of liquid nitrogen into the packaging container.

Inside the container, the liquid nitrogen quickly absorbs heat and evaporates into nitrogen gas, creating stable internal pressure. This pressure strengthens the container structure while reducing oxygen content, thereby extending product shelf life and improving packaging stability.

The system uses vacuum-insulated transfer pipelines and gas-liquid separation devices to maintain liquid nitrogen in a stable cryogenic liquid state. An automatic control system accurately regulates dosing time and dosage, ensuring a reliable and consistent dosing process.

System Components

The liquid nitrogen dosing system mainly consists of a liquid nitrogen generation unit, liquid nitrogen storage tank, self-pressurizing liquid nitrogen container, vacuum-insulated liquid nitrogen pipeline, liquid nitrogen gas-liquid separator, high-vacuum insulated flexible hose, and liquid nitrogen dosing equipment.

These components together form a complete cryogenic liquid nitrogen supply and dosing system from storage to the filling production line, enabling stable and continuous production operation.

Product Features

• High-Speed Dosing Capability:The dosing speed can reach approximately 300 cans per minute. When the production line exceeds this speed, a continuous dosing mode can be used, achieving up to 1000 cans per minute.
• Intelligent Dosing Control:At low speeds, the system uses an intermittent “no container, no dosing” mode. At high speeds, the dosing valve remains open and automatically adjusts according to production line speed changes.
• Vacuum-Insulated Transfer:Vacuum-insulated pipelines and hoses minimize liquid nitrogen evaporation losses during transfer.
• Gas-Liquid Separation Technology:A gas-liquid separator ensures that liquid nitrogen remains in a sub-cooled liquid state, improving liquid purity and dosing accuracy.
• Anti-Freezing Nozzle Design:A specially designed nozzle protection system prevents frosting and blockage, ensuring stable operation.
• Stable Buffer Structure:Liquid nitrogen buffering reduces rebound and splashing, ensuring consistent dosing and balanced internal container pressure.
• Precision Filtration Protection:An optional 10 μm filtration system removes particulate contamination to ensure liquid nitrogen purity.
• Accurate Control System:Dosing time and volume can be precisely adjusted, with continuous self-monitoring through alarm indicators.
• Automated Operation:The system supports PLC control and touchscreen operation, with multi-language human–machine interface options available.
• Flexible Installation:Compact design allows easy installation and direct connection to vacuum-insulated liquid nitrogen pipelines, compatible with various filling lines.
• Wide Compatibility:The system adapts to different production speeds and supports multiple packaging types, including PET bottles and thin-wall aluminum cans.

Applications

• Beverage Filling Industry:Used in filling lines for carbonated drinks, juices, and functional beverages to improve packaging stability and reduce oxygen content.
• Beer Production:During beer canning, liquid nitrogen dosing creates stable internal pressure and maintains container shape.
• Dairy Processing:Suitable for milk and other liquid dairy product packaging, helping maintain product quality and extend shelf life.
• Edible Oil Packaging:Liquid nitrogen dosing reduces oxidation during edible oil packaging and extends product storage life.
• Food Processing and Packaging:Suitable for filling lines handling various liquid or semi-liquid food products, improving packaging quality and production efficiency.