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 7 business centers: boilers, deep-freezing containers, pressure vessels, central air conditioning, engineering installation, international trade, and Internet of Things. It has three factory areas on Jinnan Road, East Yangtze Road, and Bohai Road, covering a total of 200,000 square meters. The main workshop is 83,000 square meters. It currently employs 710 people, including 247 engineering and technical personnel and 82 middle-level technical personnel. 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.
When selecting the insulation material for a low-temperature liquid storage tank, consider the following factors:
Thermal Conductivity: The lower the thermal conductivity of insulation materials, the better their insulation performance. Therefore, materials with lower thermal conductivity should be chosen, such as polyethylene foam (EPS), polyester foam (PUR), and silicate fibers.
Density: The density of insulating materials also affects their thermal insulation performance. Generally speaking, the higher the density, the better the insulation. However, excessively high density may increase the weight and cost of the storage tank. Therefore, a balance needs to be struck between insulation performance and the requirements of the storage tank structure.
Corrosion Resistance: Due to the special working environment of low-temperature liquid storage tanks, the insulation material needs to have good corrosion resistance, capable of withstanding the erosion by low-temperature liquids. For instance, glass fiber and silicate fiber have excellent corrosion resistance.
Reliability and durability: Insulation materials must have good reliability and durability, maintaining their insulating properties over the long term. Choose verified and tested materials to ensure their quality and performance.
Construction convenience: The ease of installation and maintenance of the insulating material is also a factor to consider. Choosing materials that are easy to install and maintain can enhance construction efficiency and reduce costs.
Environmental friendliness: Consider selecting environmentally friendly insulation materials, such as recyclable ones, to minimize impact on the environment.
Considering these factors, you can select appropriate insulation materials to ensure excellent thermal insulation and durability, guaranteeing the safety and efficient operation of low-temperature liquid storage tanks. When choosing insulation materials, it is advisable to consult with engineers or consulting agencies for more accurate recommendations and guidance.

Liquid nitrogen tanks are equipment used for storing liquid nitrogen and are widely used in the following fields:  Frozen Food and Cold Chain Logistics: Liquid nitrogen tanks are utilized in the frozen food and cold chain 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 rapidly freeze food, preventing bacterial growth and spoilage.  Scientific Research: Liquid nitrogen tanks are widely used in the field for cryopreservation of biological samples, cells, tissues, and more. The low temperature of liquid nitrogen effectively preserves the integrity and viability of biological materials, used in medical research, biomedicine engineering, and transplantation fields.  Laboratory Research: 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.  Metalworking and Welding: Liquid nitrogen tanks are used in metalworking and welding to cool and control metal temperatures. Liquid nitrogen can rapidly cool metals, improve their 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 evaporated into gaseous nitrogen for applications such as gas shielded welding, gas fire suppression systems, gas analysis, and laboratory gas supply.  In summary, liquid nitrogen tanks have extensive applications in the fields of frozen food, laboratory research, metalworking, and gas supply, providing storage and supply functions for liquid nitrogen at application sites.

The filling of a low-temperature liquid nitrogen tank refers to the process of transferring liquid nitrogen from an external supply source into the tank. Below is an explanation of the filling process for low-temperature liquid nitrogen tanks:
Preparation: Prior to filling the liquid nitrogen tank, thorough preparation is required. This includes inspecting the tank's condition and safety, ensuring the interior is clean, free of impurities, and contaminants. Additionally, check the quality of the liquid nitrogen from the supply source and the safety of the supply pipeline.
Connect supply source: Link the liquid nitrogen supply source to the liquid inlet of the storage tank. Ensure the connection is securely fastened to prevent leaks.
Control Liquid Level: During the bottling process, it is necessary to control the liquid nitrogen level to prevent overfilling or overflow. A liquid level gauge or a liquid level control system can be used to monitor and control the level.
Slow Injection: The injection of liquid nitrogen should be gradual to prevent rapid vaporization and increased pressure. Appropriate valves and flow control devices can be used to regulate the injection rate.
Monitor Pressure: During the canning process, it's necessary to monitor the storage tank's pressure to ensure it remains within a safe range. Pressure gauges or pressure sensors can be used for monitoring.
Canning completed: Stop the injection of liquid nitrogen when the liquid nitrogen level reaches the predetermined filling amount or the tank's capacity limit. Disconnect the connection with the supply source and ensure the tightness of the filling port.
Safe Operation: Throughout the canning process, it is essential to adhere to relevant safety regulations and operational guidelines. Liquid nitrogen is highly flammable at low temperatures, so operators must wear appropriate personal protective equipment and ensure the operating environment is free of any ignition sources.
When bottling liquid nitrogen, be mindful of its low-temperature characteristics and safety. Ensure safe operation and control throughout the bottling process to guarantee the safe operation of the storage tank and effective storage of liquid nitrogen.

Prior to using the liquid oxygen tank, the following preparations must be made:
Safety Inspections: Ensure the tank and its surrounding environment are safe. Check for any damage, leaks, or other safety hazards. Make sure there are no flammable materials or other hazardous items in the vicinity of the tank.
Tank Preparation: Inspect the tank's exterior, including the shell, welds, valves, and fittings. Ensure there are no visible damages or corrosion. Check that the insulation layer is intact and undamaged.
Liquid Oxygen Filling: Utilize liquid oxygen delivery equipment to fill the storage tank. Ensure that the flow rate and pressure of the liquid oxygen are maintained within safe limits during the filling process.
Pressure Control: Storage tanks should be equipped with pressure control devices to ensure the internal pressure of the tank remains within a safe range. Inspect and adjust the pressure control devices to ensure their proper functioning.
Valve Operation: Check that the valves and fittings on the tank are functioning properly. Ensure the valves open and close smoothly and reliably. Adjust the valve's open and close positions as needed.
Safety Equipment: Inspect the safety equipment around the storage tank, such as fire separation zones and alarm systems, to ensure they are functioning properly.
Operator Training: Ensure operators are proficient in the safe operation of liquid oxygen storage tanks.
Shandong Zhongjie Special Equipment, welcome customers to visit our factory for business negotiations.