Shandong Zhongjie Special Equipment Co., Ltd. specializes in the following products: fuel (gas) boilers, organic heat carrier boilers, biomass boilers, waste heat recovery boilers, and other boiler products; vacuum insulated cryogenic pressure vessels such as LNG storage tanks, oxygen/nitrogen/argon storage tanks, and CO2 storage tanks; pressure vessel products including denitrification engineering equipment, heat storage and energy storage equipment, and complete chemical equipment; 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.
The stable pressure design of a 15 cubic meter liquid argon storage tank should consider the following aspects:
Tank Pressure: Determine the design pressure of the tank to meet the storage and supply requirements for liquid argon. Establish an appropriate design pressure range based on the characteristics and usage conditions of liquid argon.
Stabilization System: Select an appropriate stabilization system to maintain stable pressure within the storage tank. The stabilization system typically includes components such as pressure regulators, pressure sensors, and control valves, which are used for monitoring and adjusting the pressure inside the tank.
Pressure Sensor: Install a pressure sensor to monitor the pressure changes inside the storage tank in real-time. The sensor transmits pressure signals to the pressure regulation system, allowing for timely adjustment of the control valve to maintain stable pressure within the tank.
Control Valve: Select an appropriate control valve for regulating gas flow and pressure within the storage tank. The control valve should have excellent regulating performance and stability to ensure the pressure within the tank remains within the set range.
Safety Valve: Install a safety valve to automatically release gas when the pressure inside the tank exceeds the set value, preventing overpressure. The safety valve should be selected and installed based on the design pressure and capacity of the tank.
Voltage Regulation System Control: Configure an appropriate control system to monitor and regulate the operation of the voltage regulation system. The control system can achieve automatic adjustment and alarm functions to ensure stable and safe pressure within the storage tank.
It is important to note that the design of the pressure stabilization system should be tailored to the specific engineering requirements and operational conditions of the liquid argon storage tank, adhering to relevant local regulations, standards, and specifications. When designing and installing the pressure stabilization system, it is recommended to consult with a qualified engineer or seek guidance from relevant institutions to ensure the reliability and safety of the system.

The dimensions and structure of liquid oxygen tanks can vary based on specific requirements and applications. Below are common sizes and structures of liquid oxygen tanks:
Dimensions: The size of liquid oxygen tanks is typically determined by the storage or transport capacity of liquid oxygen. Common capacities range from a few thousand to several tens of thousands of liters.
Structure: The structure of the liquid oxygen tank mainly includes the inner shell, outer shell, insulation layer, and supporting structure, etc.
Inner Vessel: The inner vessel of a liquid oxygen tank is designed for storing liquid oxygen, commonly made of materials like stainless steel or aluminum alloy, offering excellent corrosion resistance and sealing properties.
Shell: The shell of a liquid oxygen tank is the external structure that protects the inner lining, typically made of carbon steel or stainless steel, offering sufficient strength and corrosion resistance.
Insulation Layer: The insulation layer of the liquid oxygen storage tank is used to reduce heat conduction and loss, maintaining the low temperature state of the liquid oxygen. Common insulation materials include polyethylene foam, glass fiber, and aerogel, etc.
Support Structure: The support structure for the liquid oxygen tank is used to support and secure the inner shell and outer casing of the tank. The support structure is typically made of steel, offering sufficient strength and stability.
The dimensions and structural design of liquid oxygen tanks must consider the properties of liquid oxygen, storage or transportation requirements, safety standards, and other factors. When using liquid oxygen tanks, strict adherence to relevant operational specifications and safety requirements is necessary to ensure safe use.

Daily inspections of liquid nitrogen storage tanks primarily include the following aspects:
Appearance Inspection: Check for any obvious damage, deformation, or corrosion on the tank's exterior, including the tank walls, valves, pipes, and joints.
Sealability Inspection: Check the tank's sealing performance, including inspecting for any leakage at valve and pipe connections, as well as verifying the proper functioning of the tank's exhaust valve and safety valve.
Pressure Check: Verify that the tank's pressure gauge is functioning properly and that the pressure is within the normal range to ensure the tank operates correctly.
Level Inspection: Check the liquid nitrogen tank's level to ensure it is within the normal range, avoiding issues caused by either excessive or insufficient levels.
Insulation Layer Inspection: Verify that the tank's insulation layer is intact, free of damage or detachment, to ensure effective insulation and reduce evaporation losses of liquid nitrogen.
Leak Inspection: Check for signs of liquid nitrogen leakage around the storage tank, including frost, ice, or liquid nitrogen residue on the ground.
Safety Equipment Inspection: Verify that the storage tank's safety equipment, such as leak detectors, alarm systems, and safety valves, are functioning properly to ensure the tank's safety.
Cleaning Inspection: Regularly clean the interior of storage tanks to remove accumulated impurities and dirt, maintaining cleanliness and sanitation.
Above are the key contents for the daily inspection of liquid nitrogen tanks. The specific inspection items should be adjusted and supplemented according to the tank's model, usage, and relevant regulations. During the inspection process, strict adherence to the operational procedures and safety operation requirements is essential to ensure the safe operation of the tank.

The safe operation of low-temperature liquid storage tanks primarily involves the following key aspects:
Tank design and material selection: The tank design must comply with relevant safety standards and regulations, capable of withstanding the pressure and temperature of low-temperature liquids. Choose suitable materials, such as stainless steel and aluminum alloys, to ensure the tank's corrosion resistance and low-temperature performance.
Insulation and Protection Measures: Low-temperature liquid storage tanks should be equipped with effective insulation to reduce heat transfer and liquid evaporation. The selection and installation of the insulation should comply with relevant standards and requirements. Additionally, protective measures such as anti-freezing and anti-explosion measures should be implemented to ensure the safe operation of the tank.
Pressure Control and Safety Valves: Low-temperature liquid storage tanks should be equipped with a reliable pressure control system and safety valves to ensure that the pressure within the tank remains within safe limits. The pressure control system should be capable of promptly detecting and adjusting the pressure inside the tank, preventing risks from either excessively high or low pressure.
Leak and Fire Protection: Low-temperature liquids are highly flammable, so measures must be taken to prevent leaks and fires. Storage tanks and related pipelines should have good sealing and be regularly inspected and maintained to prevent leaks. Additionally, appropriate fire protection facilities and fire-fighting equipment should be provided to mitigate fire risks.
Safety Operation and Training: Operators must undergo relevant safety training, familiarize themselves with the safety operation procedures and emergency response measures for low-temperature liquid storage tanks. Adhere to correct operational steps to ensure safe operation.
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