Shandong Zhongjie Special Equipment Co., Ltd. specializes in the following products: fuel (gas) boilers, organic heat carrier boilers, biomass boilers, waste heat boilers, and other boiler products; vacuum insulation cryogenic pressure vessels such as LNG tanks, oxygen/nitrogen/argon tanks, and CO2 tanks; pressure vessel products including denitrification engineering equipment, heat storage and energy storage equipment, and complete chemical equipment sets; central air conditioning and ventilation equipment such as ground (water) source heat pumps, air source units, water-cooled screw units, and air-cooled modular units. Planned products include large-scale energy centers, LNG transport vehicles, LNG tank containers, and other green energy equipment.
Liquid oxygen storage tanks are used for storing and supplying liquid oxygen as fuel and oxidizer. They play a critical role in launch propulsion systems and similar applications. Industrial Production: Liquid oxygen is used as an oxidizer in industrial production for processes such as combustion, oxidation, and oxygen supply. Liquid oxygen storage tanks are used to store and supply liquid oxygen to meet the needs of industrial processes like metal cutting, welding, and chemical reactions. Equipment: Liquid oxygen storage tanks are used in equipment to supply oxygen, such as oxygen therapy, oxygen inhalation, and operating rooms. These tanks provide high-purity oxygen while maintaining a低温 state to meet the equipment's oxygen requirements. Laboratory Research: Liquid oxygen storage tanks are used in scientific research and laboratories to provide liquid oxygen as experimental materials and reagents. The low temperature and high purity of liquid oxygen make it widely applicable in laboratories, such as in material science, chemical reactions, and biomedical research. In summary, liquid oxygen storage tanks are important in various fields, including industrial production, equipment, and laboratory research, providing storage and supply functions for liquid oxygen at the application sites.

When storing liquid nitrogen in low-temperature storage tanks, be mindful of the following points:
Protective Gear: When operating low-temperature storage tanks, appropriate protective gear must be worn, including protective gloves, suits, and non-slip shoes. This equipment protects the skin from the low temperatures of liquid nitrogen and other hazards.
Avoid direct contact: Liquid nitrogen is extremely cold and can cause chilling. Therefore, it is crucial to avoid direct contact with liquid nitrogen, especially with the skin. Use tools or equipment for handling, and never touch liquid nitrogen with your hands.
Ventilation Requirements: In the operation area of low-temperature storage tanks, adequate ventilation must be ensured to expel gases produced by the evaporation of liquid nitrogen. Maintain air circulation to avoid excessive oxygen concentration, reducing the risk of fire and explosion.
Prevent Leaks: Regularly inspect the low-temperature storage tanks for leaks and equip them with leak detection and alarm systems. In case of a leak, take immediate action to control the leak and carry out repairs. Avoid the harm to personnel and the environment caused by the leakage of liquid nitrogen.
Fire Prevention Measures: Liquid nitrogen has a low boiling and freezing point, which makes it prone to fires. To prevent and contain fires, fire barriers and fire-retardant coatings are set up around low-temperature storage tanks.
Static Dissipation: Electrostatic buildup in low-temperature tanks can cause sparks, increasing the risk of fire. Measures such as using static-conductive materials and anti-static equipment should be taken to reduce the accumulation and release of static electricity.
Regular Inspections and Maintenance: Conduct regular checks on the condition of low-temperature storage tanks and related equipment, including valves, pipes, pressure gauges, etc. Ensure that the equipment is in perfect condition and promptly repair or replace any damaged parts.
Waste Gas Treatment: Low-temperature storage tanks will produce waste gas during operation, and appropriate waste gas treatment measures must be taken to minimize environmental impact.
Above are the precautions to be taken when storing liquid nitrogen in a low-temperature storage tank, ensuring operational safety and the normal operation of the tank. During the operation, it should be strictly adhered to the relevant operational procedures and safety operation requirements to prevent accidents from occurring.

The medical oxygen steel cylinder refilling plant, in addition to the liquid oxygen storage tanks, includes the following components:
Oxygen Compressor: Oxygen compressors are used to compress gaseous oxygen into high-pressure oxygen. These compressors are typically made with special materials and designs to ensure safe handling and compression of oxygen.
Oxygen Purification System: The oxygen purification system is designed to remove impurities and contaminants from oxygen, ensuring the purity and quality of the supplied oxygen. The system typically includes filters, absorbents, and molecular sieves.
Oxygen Storage System: In addition to liquid oxygen tanks, the oxygen filling area may also include a gaseous oxygen storage system for temporary storage and supply of gaseous oxygen. The gaseous oxygen storage system typically consists of high-pressure oxygen cylinders or gas storage tanks.
Filling Equipment: Filling equipment is used to transfer oxygen from liquid oxygen storage tanks or gaseous oxygen storage systems into medical oxygen steel cylinders. The filling equipment typically includes filling machines, filling pipelines, and filling control systems.
Oxygen Quality Monitoring System: The oxygen quality monitoring system is used to monitor the quality and purity of oxygen being filled. Quality testing and monitoring of the filled oxygen are conducted through an oxygen analyzer or other detection equipment.
Safety Facilities: The filling area should be equipped with corresponding safety facilities, such as fire alarm systems, oxygen leak detection systems, and ventilation systems, to ensure the safety and protective measures during the filling process.
It is important to note that the design and equipment configuration of a medical oxygen cylinder filling facility should comply with relevant regulations, standards, and specifications. During the filling process, strict adherence to operational procedures and safety requirements is essential to ensure the safe supply of oxygen.

The cooling process and precautions for liquid argon cylinders are as follows:
Cooling Process Analysis:
Ensure Tank Cleanliness: Prior to cooling the liquid argon tank, make sure the interior is clean and free of impurities and contaminants. Use an appropriate cleaner for cleaning and rinse thoroughly.
Drainage and Exhausting: To empty the gas inside the tank and expel it through the exhaust system to reduce the gas content within the tank.
Add Liquid Nitrogen: Inject liquid nitrogen into the tank, which can rapidly cool the air and walls inside the tank with its low temperature, thereby reducing the tank's temperature.
Waiting for cooling: Liquid nitrogen will gradually lower the temperature inside the tank through the process of heat conduction until it reaches the required low temperature.
Cautionary Notes:
Safety Precautions: During the cooling process of the liquid argon tank, necessary safety precautions must be taken. Liquid argon has low temperatures and high flammability, so operators should wear protective suits, gloves, and other personal protective equipment to ensure safe operation.
Fire Prevention Measures: Liquid argon is highly flammable, so during the cooling process of the liquid argon tank, it is essential to ensure there are no ignition sources in the surrounding environment and to equip with appropriate fire extinguishing equipment.
Temperature Control: During the cooling process of the liquid argon cylinder, it is necessary to control the cylinder's temperature to prevent overcooling or insufficient cooling. Temperature sensors and a temperature control system can be used to monitor and regulate the cylinder's temperature.
Insulation and Heat Retention: Liquid argon tanks typically employ double or multi-layer construction, filled with insulating material in the middle to reduce heat transfer and evaporation of liquid argon. Ensure the integrity and good insulation of the insulating layer.
Our company attaches great importance to technological innovation and R&D design. We have one municipal-level enterprise technology center in Heze City, equipped with testing facilities for non-destructive testing, physical and chemical testing, welding testing, hydrostatic testing, etc. We have over 600 types of equipment, including CNC machine tools, X-ray flaw detectors, digital ultrasonic flaw detectors, mechanical property testing machines, chemical analyzers, spectrometers, tensile testing machines, plasma welding machines, and more. The key products we have developed, such as temperature and pressure vessel welding, biomass boiler emission reduction, and waste heat utilization, have successively been selected for multiple Shandong Provincial Department of Industry and Information Technology science and technology innovation projects, Shandong Provincial key projects, and Heze City innovation and excellence projects. We have cumulatively obtained 27 authorized utility models, 16 authorized inventions, participated in drafting 2 standards, 2 industry standards, and registered 15 trademarks. The technical team of our company, in collaboration with Professor Yajiang Li of Shandong University, has developed deep cryogenic container processing technology using the international plasma arc + filler wire tungsten inert gas arc welding (PAW-GTAW) technology. After being appraised as a provincial-level scientific and technological achievement, our technology level has reached an international standard in the field of deep cryogenic container manufacturing. Choose Zhongjie Special Equipment, and let's create brilliance together!