Shandong Zhongjie Special Equipment's main products include: 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 such as 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.
Liquid Oxygen Stations are facilities designed for storing and supplying liquid oxygen, with liquid oxygen tanks being a crucial component of these stations. The liquid oxygen tanks possess several important functions and characteristics:
Liquid Oxygen Storage: Liquid oxygen tanks are primarily used for storing liquid oxygen, cooling gaseous oxygen below its critical temperature to convert it into a liquid state. The storage density of liquid oxygen is high, allowing for the storage of large amounts of oxygen in a relatively small space.
Maintain Low Temperature: Liquid oxygen tanks are typically designed with a double-layer structure, separated by a vacuum layer between the inner and outer layers to minimize heat conduction and maintain low temperatures. This helps to preserve the低温 state of the liquid oxygen, preventing premature vaporization.
Safety Design: Liquid oxygen tanks must be designed and manufactured with safety in mind. They are typically made from high-strength materials such as stainless steel or aluminum alloys to withstand high pressure and low-temperature conditions. Additionally, liquid oxygen tanks are equipped with safety valves, pressure sensors, and temperature sensors to ensure that the pressure and temperature inside the tank remain within safe limits.
Supply System Connection: Liquid oxygen tanks are typically connected to the supply system to deliver liquid oxygen to the required locations. The supply system includes equipment such as liquid oxygen pumps, pipelines, and valves, which are used to extract liquid oxygen from the tanks and transport it to the customer's end.
Liquid oxygen storage tanks play a crucial role in storing and maintaining liquid oxygen at liquid oxygen stations. Their design and use must strictly adhere to relevant safety regulations and operational procedures to ensure the safety and reliability of the storage and supply process.

The use of low-temperature liquid storage tanks requires attention to the following matters:
Safe Operation: Operators must undergo training to understand the procedures and safety precautions for tank operation. Adhere to the correct operational steps to ensure safe operation.
Protective Gear: Operators must wear appropriate protective gear, such as thermal suits, gloves, etc., to safeguard themselves from the harm of low-temperature liquids.
Leak Protection: Regularly inspect the tank and related pipelines for seal integrity to prevent leakage of low-temperature liquids. Keep the area around the tank clean to avoid debris obstructing leak detection and handling.
Fire Protection: Low-temperature liquids are highly flammable and fire prevention measures must be taken. Keep the storage tank area free of ignition sources, prohibit smoking and open flames. Equip with appropriate fire-fighting equipment to mitigate fire risks.
Pressure Control: Regularly inspect and maintain the pressure control system of the storage tank to ensure the pressure inside is within the safe range. Safety valves and pressure sensors, among other equipment, should operate normally, and abnormal pressure situations should be detected and addressed promptly.
Insulation Protection: Low-temperature liquid storage tanks should be equipped with effective insulation to minimize heat transfer and liquid evaporation. The selection and installation of the insulation should comply with relevant standards and requirements.
Regular Inspections and Maintenance: Conduct regular inspections of the tank's exterior and interior, including checking for leaks, corrosion, wear, or other damage. Pay special attention to inspecting the tank's interfaces, valves, and pipelines, ensuring they are functioning properly.
Emergency Preparedness: Develop an emergency response plan, including measures for leaks, fires, and other unforeseen incidents. Operators should be familiar with the emergency response plan and be equipped with appropriate emergency equipment and firefighting tools.

The safety distance for liquid oxygen storage tanks refers to the distance that must be maintained around the tank to ensure the safety of personnel and equipment. Specific requirements for safety distances may vary depending on different regions and application sites. Here are some common principles for safety distances: - Buildings and Equipment: Liquid oxygen tanks should be kept at a certain safe distance from buildings, equipment, and other storage tanks to prevent the spread of fires, explosions, and leaks. The specific safety distance requirements should be assessed and determined according to local regulations and standards. - Ignition and Heat Sources: Liquid oxygen is highly oxidizing and can easily cause fires and explosions. Therefore, liquid oxygen tanks should be kept at a sufficient safe distance from ignition sources, heat sources, and flammable materials to prevent fires and explosions. - Ventilation and Exhaust: Good ventilation and exhaust should be maintained around liquid oxygen tanks to prevent the accumulation of evaporated oxygen and the formation of explosive mixtures. The design and operation of ventilation and exhaust systems should comply with relevant safety standards and specifications. - Personnel and Traffic: Personnel and traffic around liquid oxygen tanks should be restricted and controlled to ensure personnel safety and the normal operation of the tank. Warning signs, safety fences, and restricted areas should be established to prevent unauthorized personnel from entering the tank area. It should be noted that the safety distance for liquid oxygen storage tanks should be assessed and determined based on the specific application site and safety requirements. When designing, installing, and operating liquid oxygen storage tanks, it is necessary to follow relevant regulations, standards, and safety guidelines to ensure the safety and reliability of the tank.

Daily inspection content for liquid nitrogen storage tanks mainly includes 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 sealing performance of the tank, including inspecting for leaks at valve and pipe connections, and verifying that the tank's exhaust valve and safety valve are functioning properly.
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 normally.
Level Check: Monitor the liquid nitrogen tank's level to ensure it stays within the normal range, preventing issues caused by levels that are too high or too low.
Insulation Layer Inspection: Verify that the tank's insulation layer is intact and free from damage or detachment to ensure optimal insulation performance and minimize evaporation losses of liquid nitrogen.
Leak Inspection: Check for signs of liquid nitrogen leakage around the storage tank, including frost, ice, or liquid nitrogen stains on the ground.
Safety Equipment Inspection: Check that the safety equipment of the storage tank, 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 the tank to remove accumulated impurities and dirt, maintaining the tank's cleanliness and hygiene.
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.
Our company attaches great importance to technological innovation and research and development, with 1 municipal enterprise technology center in Heze City. We have established testing facilities for non-destructive testing, physical and chemical testing, welding testing, hydrostatic testing, etc., and are equipped with over 600 types of instruments and 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 Li Yajiang 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, which has been appraised as an internationally competitive level in deep cryogenic container manufacturing after provincial-level scientific and technological achievement identification. Choose Zhongjie Special Equipment, and let's create brilliance together!