Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) was established in 2001, located at No. 2218 Jinnan Road, Economic and Technological Development Zone, Heze City. With a registered capital of 50 million yuan and total assets of 500 million yuan, the company has seven business centers: boilers, deep-freezing 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 area 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.
Liquid nitrogen tanks are equipment used for storing liquid nitrogen and are widely used in the following fields: Frozen Food and Refrigerated Logistics: Liquid nitrogen tanks are used in the frozen food and refrigerated logistics industry to freeze or refrigerate food and other perishable items, extending their shelf life and maintaining freshness. The low temperature of liquid nitrogen can quickly freeze food, prevent bacterial growth, and prevent food spoilage. Scientific Research and Laboratories: Liquid nitrogen tanks are used in scientific research and laboratories to provide liquid nitrogen as a coolant and freezing medium. The low temperature of liquid nitrogen can be used for cooling laboratory equipment, material research, superconducting electronics, and low-temperature physics. Metal Processing and Welding: Liquid nitrogen tanks are used in metal processing and welding to cool and control the temperature of metal. Liquid nitrogen can rapidly cool metal, improve its hardness and strength, and reduce deformation and stress. Gas Storage and Supply: Liquid nitrogen tanks are also used for storing and supplying nitrogen gas. Liquid nitrogen can be converted into gaseous nitrogen through evaporation and used in applications such as gas shielded welding, gas fire suppression systems, gas analysis, and laboratory gas supply. In summary, liquid nitrogen tanks are widely used in fields such as frozen food, laboratory research, metal processing, and gas supply, providing storage and supply functions for liquid nitrogen at application sites.

Possible reasons for increased liquid nitrogen storage tank liquid loss may include:
Evaporation Loss: Liquid nitrogen is a low-temperature liquid with a boiling point of -196 degrees Celsius. Even under good insulation conditions, evaporation of liquid nitrogen occurs. Therefore, the main cause of liquid loss in liquid nitrogen storage tanks is evaporation. If the insulation layer of the tank is damaged or the insulation performance is poor, evaporation loss will increase.
Leakage: Leaks in liquid nitrogen storage tanks can also lead to increased liquid loss. Leaks may occur at the tank's interfaces, valves, pipes, and other parts. Leaks may be caused by equipment aging, material fatigue, improper operation, and other reasons.
Improper operation: Incorrect handling and maintenance may also lead to increased liquid nitrogen loss in the storage tank. For example, frequently opening the tank's lid, leaving the lid open for extended periods, and failing to repair leaks in a timely manner.
Environmental Factors: Environmental conditions can also impact the liquid nitrogen storage tank's liquid loss. For instance, high temperatures can decrease the insulation performance of the tank, thereby increasing evaporation loss.
To minimize liquid nitrogen loss in storage tanks, the following measures can be taken:
Ensure the tank's insulation is intact, and perform regular inspections and maintenance.
Regularly inspect the tank's interfaces, valves, pipelines, etc., to ensure good sealing performance and prevent leaks.
Strictly control the frequency and duration of tank openings to prevent unnecessary liquid evaporation.
Avoid using liquid nitrogen tanks in high-temperature environments, or take cooling measures to maintain a low ambient temperature around the tank.
It should be noted that liquid nitrogen storage tank liquid loss is inevitable, but with proper operation and maintenance, it can be reduced to a minimum.

Protective tips for liquid nitrogen tanks include the following:
Wear protective gear: When operating liquid nitrogen tanks, it is mandatory to wear appropriate protective gear, including gloves, protective clothing, and non-slip shoes. This gear helps protect the skin from the low temperatures of liquid nitrogen and other hazards.
Avoid direct contact: Liquid nitrogen is extremely cold and can cause cold injury. Therefore, avoid direct contact with liquid nitrogen, especially with the skin. Use tools or instruments for handling to prevent direct hand contact with liquid nitrogen.
Note ventilation: In the operation area of the liquid nitrogen tank, adequate ventilation must be ensured to expel gases produced by the evaporation of liquid nitrogen. Maintain air circulation to avoid excessive oxygen concentration and reduce the risk of fire and explosion.
Prevent Leaks: Regularly inspect the liquid nitrogen tanks for leaks and equip them with leak detectors and alarm systems. In case of a leak, take immediate action to control and repair it. Avoid hazards to personnel and the environment caused by the leakage of liquid nitrogen.
Fire Prevention Measures: Nitrogen liquid has a low boiling and freezing point, which is prone to causing fires. To prevent and contain fires, firewalls and fire-retardant coatings should be installed around nitrogen liquid storage tanks.
Static Protection: The accumulation of static electricity in liquid nitrogen tanks may 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 liquid nitrogen 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: Liquid nitrogen tanks will generate waste gas during operation, and appropriate waste gas treatment measures must be taken.

The safety distance for liquid oxygen tanks refers to the required distance around the tank to ensure the safety of personnel and equipment. Specific requirements for safety distances may vary depending on the region and application. Here are some common principles for safety distances: - Buildings and Equipment: Liquid oxygen tanks should maintain a certain safety distance from buildings, equipment, and other 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 prone to causing fires and explosions. Therefore, liquid oxygen tanks should be kept at a sufficient distance from ignition sources, heat sources, and flammable materials to prevent fires and explosions. - Ventilation and Exhaustion: Good ventilation and exhaust should be maintained around liquid oxygen tanks to prevent the vapor accumulation of liquid oxygen and the formation of explosive mixtures. The design and operation of ventilation and exhaust systems should comply with relevant safety standards and regulations. - 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 entry into the tank area. It should be noted that the safety distance for liquid oxygen tanks should be assessed and determined based on the specific application and safety requirements. When designing, installing, and operating liquid oxygen tanks, it is essential to follow relevant regulations, standards, and safety guidelines to ensure the tank's safety and reliability.
Zhongjie Special Equipment adheres to the great vision of "realizing employees' dreams, creating value for customers, and striving for the prosperity and strength of our motherland," wholeheartedly committed to the development of green energy equipment. We dedicate products and services of high cost-performance to society!