Gas Supply Modes of Cryogenic Liquid Oxygen Tanks
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Cryogenic liquid oxygen tanks, as a type of jacketed vacuum powder-insulated pressure vessel, are specifically designed for storing and supplying cryogenic liquefied gases. Their applications have become increasingly widespread in both industrial production and daily life. This article aims to explore the structure, gas supply modes, and safe applications of cryogenic liquid oxygen tanks through an analysis of the hazardous characteristics of cryogenic liquids and the various gas supply modes associated with this pressure vessel.
Structure of Cryogenic Liquid Oxygen Tanks
Cryogenic liquid oxygen tanks feature a jacketed vacuum powder-insulated structure, where the container storing the medium is enveloped within an insulation layer and protected by an external steel shell. The main components include:
- Liquid oxygen storage container: Responsible for storing cryogenic liquid oxygen.
- Insulation layer: Composed of vacuum and powder insulation materials to reduce heat transfer and maintain cryogenic temperatures.
- Jacketed structure: Provides external protection and enhances structural strength.
- Auxiliary equipment: Includes pressure relief valves, liquid level indicators, and other safety and monitoring devices.
Applications and Procedures of Gas Supply Modes
In this section, we delve into the practical applications and operational guidelines associated with the various gas supply modes utilized with cryogenic liquid oxygen tanks.
1. Cryogenic Insulated Cylinder Filling
This mode is suitable for larger users, where cryogenic liquid is directly transferred from the tank to insulated cylinders. Operational procedures involve ensuring cylinder venting and preventing valve freezing. Additionally, to ensure safety, operators need to maintain a standing position and avoid prolonged exposure near the liquid outlet or vent.
2. High-Pressure Cylinder Filling
This mode involves transferring cryogenic liquid through a liquid pump and vaporizer into high-pressure cylinders. To ensure operational safety, filling facilities must hold the necessary permits and be equipped with automatic shutdown protection systems to prevent direct liquid filling or cylinder overpressure-induced explosions.
3. Cryogenic Liquid Spraying Supply
Using cryogenic liquid tanks, cryogenic liquid (commonly liquid nitrogen) can be directly sprayed onto external objects for various applications, such as cryogenic processing. Operators must minimize heat loss during spraying, ensure adequate insulation for pipelines, and implement moisture-proof measures to guarantee effective and safe liquid supply.
4. Centralized Gas Supply via Pipeline Network
Through this mode, cryogenic liquid from the tank is vaporized and supplied to a centralized gas network, meeting the demands of larger areas or multiple users. Proper terminal pipeline regulation systems are necessary to maintain stable gas supply pressures and ensure operational safety.
This mode is suitable for larger users, where cryogenic liquid is directly transferred from the tank to insulated cylinders. Operational procedures involve ensuring cylinder venting and preventing valve freezing. Additionally, to ensure safety, operators need to maintain a standing position and avoid prolonged exposure near the liquid outlet or vent.
2. High-Pressure Cylinder Filling
This mode involves transferring cryogenic liquid through a liquid pump and vaporizer into high-pressure cylinders. To ensure operational safety, filling facilities must hold the necessary permits and be equipped with automatic shutdown protection systems to prevent direct liquid filling or cylinder overpressure-induced explosions.
3. Cryogenic Liquid Spraying Supply
Using cryogenic liquid tanks, cryogenic liquid (commonly liquid nitrogen) can be directly sprayed onto external objects for various applications, such as cryogenic processing. Operators must minimize heat loss during spraying, ensure adequate insulation for pipelines, and implement moisture-proof measures to guarantee effective and safe liquid supply.
4. Centralized Gas Supply via Pipeline Network
Through this mode, cryogenic liquid from the tank is vaporized and supplied to a centralized gas network, meeting the demands of larger areas or multiple users. Proper terminal pipeline regulation systems are necessary to maintain stable gas supply pressures and ensure operational safety.
Regardless of the gas supply mode, safety remains paramount. Operators must strictly adhere to operational procedures, undergo relevant training, and wear necessary personal protective equipment. Regular equipment inspections and maintenance are essential to ensure proper functioning and safety.
In conclusion, cryogenic liquid oxygen tanks require diverse considerations in gas supply modes, safety applications, and operational procedures. Only through strict adherence to operational protocols can these tanks operate safely and efficiently in both industrial production and daily applications.
