Shandong Zhongjie Special Equipment's main products include: fuel (gas) boilers, organic heat carrier boilers, biomass boilers, waste heat recovery boilers, and other boiler products; vacuum insulation cryogenic pressure vessels such as LNG storage tanks, oxygen/nitrogen/argon storage tanks, and CO2 storage tanks; pressure vessel products such as denitrification engineering equipment, heat storage and energy storage equipment, and complete chemical equipment sets; central air conditioning and HVAC 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.
The use and operation of the liquid oxygen storage tank system should be mindful of the following points:
Safe Operation: When operating the liquid oxygen storage tank system, it is mandatory to adhere to relevant safety operation procedures and standards to ensure the safety of the operators.
Tanks Selection: Choose liquid oxygen tanks that comply with specifications and standards, ensuring their quality and safety performance.
Tank Installation: Tanks should be installed on a sturdy foundation to ensure stability. Additionally, good ventilation should be maintained around the tank, and it should be kept away from flammable materials and heat sources.
Seal Integrity Inspection: Regularly inspect the sealing performance of the storage tank system to ensure there are no leakage phenomena at valve and pipe connections.
Pressure Control: Storage systems should be equipped with pressure gauges and safety valves, and undergo regular inspections and maintenance to ensure pressure remains within safe limits.
Fire Protection Measures: Liquid oxygen contains a high concentration of oxygen, which is prone to causing fires. Install firewalls around the storage tank system, ban smoking and open flames, and ensure safety.
Static Dissipation: During the operation of the liquid oxygen system, static electricity may cause sparks, increasing the risk of fire. Measures such as using static-conductive materials and anti-static equipment are taken to reduce the accumulation and release of static electricity.
Regular inspections and maintenance: Conduct regular checks on the tank system and related equipment, including valves, pipes, pressure gauges, etc. Ensure that the equipment is in good condition without any damage, and promptly repair or replace any damaged parts.
Waste Gas Treatment: During the operation of the liquid oxygen system, waste gas is produced, and appropriate waste gas treatment measures must be taken to minimize environmental impact.
Above are the matters to be noted when using the liquid oxygen storage tank system, ensuring safe operation and the normal operation of the system. During operation, strict adherence to the relevant operational procedures and safety operation requirements should be maintained to avoid accidents.

The oxygen-filling process for liquid oxygen tanks must adhere to specific operational procedures and safety measures. Here are the steps for filling liquid oxygen tanks:
Preparation: Ensure the tank and oxygenation equipment are in good working condition, check the tank's sealing and the proper functioning of the safety valve.
Connect equipment: Link the oxygenation equipment to the tank, ensuring the connection is sealed reliably.
Prepare liquid oxygen: Transfer liquid oxygen from the storage container to the oxygen storage tank of the filling equipment. During the transfer, be cautious to prevent any leakage or contact with the liquid oxygen.
Oxygen Filling Operation: Open the valve of the oxygen filling equipment and fill liquid oxygen from the storage tank into the storage tank. During the filling process, control the filling speed and pressure to avoid excessive tank pressure and temperature rise.
Monitoring and Control: During the aeration process, the tank's pressure and temperature must be monitored to ensure they remain within safe limits. In case of any anomalies, the aeration should be halted immediately and appropriate actions taken.
Oxygen Filling Completed: Close the valve of the oxygen filling equipment and stop the oxygen filling operation when the tank reaches the required oxygen content or pressure.
Safety Handling: After oxygenation is completed, safety handling is required, including closing relevant valves and emptying the remaining liquid oxygen from the oxygenation equipment.
Note that liquid oxygen is highly oxidizing and flammable. The oxygen-filling process must strictly adhere to relevant safety operational procedures and standards. Operators should receive training and strictly follow the operational procedures and safety measures to ensure the safety and reliability of the oxygen-filling process.

The use of liquid nitrogen storage tanks in rapid freezing technology offers several advantages:
Quick Freezing Speed: Liquid nitrogen has a low temperature of approximately -196 degrees Celsius. Utilizing a liquid nitrogen tank for quick freezing can rapidly reduce the surface temperature of food, achieving fast freezing. Compared to traditional freezing methods, liquid nitrogen quick freezing can significantly reduce freezing time while preserving the quality and texture of the food.
Uniformly Frozen Effect: The liquid nitrogen rapid freezing technology achieves quick and even freezing of food. Liquid nitrogen is喷射ed onto the food surface in a gaseous form, rapidly absorbing heat and transforming into a liquid, thereby ensuring even freezing of the food and preventing crystallization and lumping during the freezing process.
Maintain Food Quality: Rapid freezing with liquid nitrogen can quickly chill food, reducing crystallization and clumping during the freezing process, thereby preserving the quality and texture of the food. During the quick-freezing process, liquid nitrogen rapidly cools the surface temperature of the food, forming tiny frozen structures, effectively retaining its moisture and nutritional content.
Flexibility and Adaptability: Liquid nitrogen tanks can be adjusted and controlled according to different food types and freezing requirements. The injection speed and angle of liquid nitrogen can be modified based on the size, shape, and freezing needs of the food to achieve optimal freezing results.
Environmental Protection and Energy-Saving: The rapid freezing technology with liquid nitrogen is more energy and resource-efficient compared to traditional freezing methods. Liquid nitrogen evaporates quickly during the freezing process, causing environmental pollution and generating waste water and gas.
Be mindful that when using liquid nitrogen tanks for rapid freezing, it is essential to adhere to the relevant safety operation procedures and guidelines. Ensure that operators are equipped with the necessary safety awareness and operational skills to prevent any accidental incidents. Additionally, consult

Standard parameters for liquid oxygen storage tanks typically include the following:
Capacity: The capacity of liquid oxygen tanks is typically expressed in liters or cubic meters, with common capacity ranges varying from several liters to several thousand liters.
Working Pressure: The working pressure of liquid oxygen tanks is typically expressed in megapascals (MPa) or bars, with a common working pressure range varying from 0.2 MPa to 2.5 MPa.
Design Temperature: The design temperature for liquid oxygen storage tanks is typically expressed in degrees Celsius, with common design temperature ranges varying from -196℃ to -150℃.
Material: The main material for liquid oxygen storage tanks is typically stainless steel, offering excellent corrosion resistance and low-temperature performance.
Insulation Layer: Liquid oxygen tanks are typically equipped with an insulation layer to minimize evaporation losses of liquid oxygen. The materials for the insulation layer are usually multi-layer composite materials or foam glass.
Safety Valve: Liquid oxygen storage tanks must be equipped with a safety valve to control the internal pressure of the tank and prevent it from bursting due to excessive pressure.
Leak Detectors: Liquid oxygen storage tanks are typically equipped with leak detectors to promptly detect and alarm any leaks in liquid oxygen.
Appearance Design: The appearance design of liquid oxygen storage tanks generally conforms to relevant standards and regulations, including color, labeling, and safety warning signs.
Note that the specific parameters of liquid oxygen tanks may vary depending on different manufacturers and application requirements; the ones mentioned above are just general common standard parameters. In actual use, choose the appropriate liquid oxygen tank based on the specific circumstances.
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