Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) was established in 2001, located at No. 2218 Jinnan Road, Development Zone, Heze City, with a registered capital of 50 million yuan and total assets of 500 million yuan. The company has 7 business centers: boilers, deep-freeze containers, pressure vessels, central air conditioning, engineering installation, international trade, and Internet of Things. It has three factory sites on Jinnan Road, East Changjiang Road, and Bohai Road, covering a total of 200,000 square meters, with the main workshop spanning 83,000 square meters. It currently employs 710 people, including 247 engineers and technicians and 82 intermediate-level technicians. In December 2016, it was recognized as a "High-tech Enterprise" by the Science and Technology Department. In June 2021, it was identified as a "Specialized and New Enterprise in Shandong Province" by the Ministry of Industry and Information Technology. In June 2022, it was recognized as a "Gazelle Enterprise in Shandong Province" and in August 2022, it was identified as a "Specialized and New Small Giant Enterprise" by the Ministry of Industry and Information Technology.
Routine maintenance is one of the key methods to ensure the safety of low-temperature storage tanks. Here are some common maintenance measures:
Regular Inspections: Conduct regular inspections of the low-temperature storage tanks, including checks on the exterior, internal structure, and anti-corrosion coatings. Look for cracks, corrosion, wear, and other issues, and promptly identify and repair potential safety hazards.
Cleaning and Deicing: Regularly clean the exterior and internal structures of the low-temperature tank to remove accumulated dirt and ice layers. The buildup of ice can lead to structural damage and corrosion, while cleaning and deicing can extend the lifespan of the tank.
Level Monitoring: Regularly monitor the liquid level in low-temperature storage tanks to ensure it stays within the safe range. Excessive or low levels can lead to overpressure or over-vacuum in the tank, increasing safety risks.
Leak Detection: Install a leak detection system to regularly check for leaks in low-temperature storage tanks. Leaks can cause liquid or gas leakage and evaporation, increasing safety risks.
Corrosion Protection Measures: Implement appropriate corrosion protection measures, such as coating protection and corrosion-resistant coatings, to safeguard the metal structure of low-temperature storage tanks from corrosion damage.
Emergency Fault Handling: Establish an emergency fault handling system to promptly address and repair failures in low-temperature storage tanks, in order to prevent accidents from occurring or escalating.
Training and Development of Personnel: Train and develop operation and maintenance staff to ensure they possess relevant knowledge and skills for the correct operation and maintenance of low-temperature storage tanks.
Note that maintenance should be tailored to the specific type of tank and operating conditions, adhering to relevant local laws, regulations, and standards. During maintenance, it is recommended to consult with engineers or guidance from relevant institutions to ensure the tank's safety and reliability.

The liquid oxygen tank possesses the following characteristics:
High Purity: The liquid oxygen storage tank contains high purity liquid oxygen, typically exceeding 99.5% purity. This makes the liquid oxygen storage tank essential for applications requiring high purity oxygen, such as medical, aerospace, and research fields.
Low Temperature: As the boiling point of liquid oxygen is -183°C, liquid oxygen storage tanks must have excellent insulation properties to maintain the low temperature state of the liquid oxygen. The tanks are typically designed with double or multi-layer structures, filled with insulating material in between to reduce heat transfer and the evaporation of liquid oxygen.
High Pressure: Liquid oxygen tanks typically need to withstand high pressure to maintain their liquid state. The design and material selection of the tank must consider the pressure requirements of liquid oxygen to ensure the tank's safety and reliability.
Flammability: Liquid oxygen is highly flammable and can support combustion. Therefore, fire prevention measures must be implemented in the design and use of liquid oxygen storage tanks to ensure there are no ignition sources nearby and appropriate fire extinguishing equipment is available.
High Density: Liquid oxygen has a higher density than gaseous oxygen, allowing liquid oxygen tanks to store more oxygen. This gives liquid oxygen tanks an advantage in applications requiring large oxygen supplies, such as in the field.
Corrosiveness: Liquid oxygen has certain properties of腐蚀性.

To prevent the danger caused by static electricity in liquid oxygen tanks, the following measures can be taken:
Ensure proper grounding for the liquid oxygen storage tank and related equipment. Grounding allows the release of static electricity to the ground, reducing the likelihood of static accumulation. Metal components such as tanks and pipes should be connected to a reliable grounding system.
Static dissipative materials: Utilize static dissipative materials to reduce the accumulation of static electricity. For instance, apply conductive coatings or materials on the insulating layer of liquid oxygen storage tanks and pipelines to ground static electricity.
Antistatic Equipment: Utilize antistatic equipment, such as static-conductive pipes and hoses, to reduce the accumulation and release of static electricity. These devices aid in grounding static electricity, thereby minimizing the occurrence of static sparks.
Static grounding wire: Install static grounding wires on liquid oxygen storage tanks and related equipment to discharge static electricity to the ground. These grounding wires should be connected to a reliable grounding system and checked and maintained regularly.
Static Eliminators: Utilize static eliminators to neutralize static electricity. These devices can counteract static by releasing opposite charges, thereby reducing static buildup and the occurrence of sparks.
Electrostatic Safety Training: Conduct electrostatic safety training for personnel using liquid oxygen tanks to enhance their awareness and prevention of electrostatic hazards. The training content may include the principles of electrostatic formation, preventive measures, and emergency response procedures.
It is important to note that the electrostatic prevention measures for liquid oxygen tanks should be designed and implemented by personnel, adhering to relevant safety operating procedures and standards. During operation, strict adherence to the prescribed operating procedures is required to avoid the generation of static sparks and ensure the safety of the tank.

Liquid nitrogen storage tanks are widely used in meat freezing. The following are several main applications of liquid nitrogen storage tanks in meat freezing:
Rapid Freezing: Liquid nitrogen tanks can provide low temperatures to quickly freeze meat to the desired temperature. Due to the low-temperature properties of liquid nitrogen, meat temperatures can be rapidly reduced in a short period, effectively preserving the quality and texture of the meat.
Chilled Storage: Liquid nitrogen tanks are suitable for long-term freezing storage of meat products. Placing meat in a liquid nitrogen tank maintains it at low temperatures, preventing the growth of bacteria and microorganisms, and extending the shelf life of the meat.
Chilled Transportation: Liquid nitrogen tanks are suitable for the cold transportation of meat products. Placing meat in a liquid nitrogen tank maintains its低温 state, ensuring the quality and freshness of the meat throughout transportation.
Chilled Processing: Liquid nitrogen tanks can be used for meat chilling. By exposing meat to liquid nitrogen, the surface can be quickly frozen, forming a frozen layer, thereby preserving the meat's moisture and nutritional content.
Chilled Processing: Liquid nitrogen tanks are suitable for meat freezing processing. Placing meat in liquid nitrogen makes it harder and more brittle, facilitating cutting, slicing, and processing.
Be mindful that when using liquid nitrogen tanks for meat freezing, it is crucial 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 accidents. Additionally, consult the food safety authority for more information.
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