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.
Material control for low-temperature liquid storage tanks is a critical aspect in ensuring the safety and reliability of the tanks. Here are some common material control measures:
Material Selection: Choose materials suitable for low-temperature environments, such as low-temperature alloy steel, stainless steel, etc. These materials possess excellent low-temperature resistance and crack resistance, maintaining strength and toughness under低温 conditions.
Material Quality Control: Ensure the selected materials meet relevant standards and specifications. Conduct chemical composition analysis, mechanical property tests, and impact tests on the materials to ensure their performance meets design requirements.
Welding Material Selection: Choose welding materials suitable for low-temperature environments, such as low-temperature welding rods or welding wires. The welding materials should match the tank material, offering good welding properties and crack resistance.
Welding Process Control: Control welding process parameters such as welding current, voltage, and welding speed to ensure the quality and reliability of the weld joints. Methods with low heat input, such as pulsed welding and laser welding, can reduce the temperature gradient and residual stress in the welding heat-affected zone.
Corrosion Prevention Measures: Apply corrosion-resistant treatments to the internal and external metal surfaces of the storage tank to extend its service life. Options include corrosion-resistant coatings and paints to protect the tank's metal structure from corrosion damage.
Material Performance Monitoring: Regular performance monitoring of storage tank materials, such as mechanical property tests,

The dimensions and structure of liquid oxygen storage tanks can vary according to specific requirements and applications. Below are common sizes and structures of liquid oxygen storage tanks:
Dimensions: The size of liquid oxygen tanks is typically determined based on the storage or transport capacity of liquid oxygen. Common capacities range from a few thousand liters to several hundred thousand liters.
Structure: The structure of the liquid oxygen tank primarily 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 stainless steel or aluminum alloy, offering excellent corrosion resistance and sealing properties.
Shell: The shell of a liquid oxygen tank is the outer structure that protects the inner liner, typically made of carbon steel or stainless steel, offering sufficient strength and corrosion resistance.
Insulation Layer: The insulation layer of a liquid oxygen storage tank is designed to reduce heat conduction and loss, maintaining the低温 state of liquid oxygen. Common insulation materials include polyethylene foam, glass fiber, and aerogel.
Support Structure: The support structure of the liquid oxygen tank is designed to support and secure the inner and outer shells of the tank. Typically made of steel, the support structure boasts adequate strength and stability.
The dimensions and structural design of liquid oxygen tanks must consider the properties of liquid oxygen, storage or transportation requirements, and safety standards. When using liquid oxygen tanks, strict adherence to operational specifications and safety requirements is necessary to ensure safe use.

The use of liquid nitrogen storage tanks in rapid freezing technology offers several advantages:
Rapid Freezing Speed: The temperature of liquid nitrogen is low, approximately -196 degrees Celsius. Using a liquid nitrogen tank for quick freezing can rapidly lower the surface temperature of food, achieving fast freezing. Compared to traditional freezing methods, liquid nitrogen quick freezing can significantly reduce freezing time while preserving the quality and texture of the food.
Uniformly Frozen Effect: The liquid nitrogen rapid freezing technology enables fast and even freezing of food. Liquid nitrogen is喷射ed onto the food surface in a gaseous form, rapidly absorbing heat and converting into a liquid state, thereby achieving even freezing of the food, avoiding crystallization and lumping during the freezing process.
Maintain Food Quality: Liquid nitrogen rapid freezing quickly chills food, reducing crystallization and clumping during the freezing process, thereby preserving the quality and texture of the food. During the rapid freezing process, liquid nitrogen rapidly lowers the surface temperature of the food, forming tiny frozen structures, effectively retaining the food's moisture and nutritional content.
Flexibility and Adaptability: Liquid nitrogen tanks can be adjusted and controlled according to different food types and freezing requirements. The speed and angle of nitrogen jet can be modified based on the size, shape, and freezing needs of the food to achieve optimal freezing effects.
Environmental Protection and Energy Saving: Liquid nitrogen rapid freezing technology is more energy and resource-efficient compared to traditional freezing methods. Liquid nitrogen evaporates quickly during the freezing process, causing environmental pollution and generating waste water and gas.
Be mindful that when using liquid nitrogen tanks for rapid freezing, it is crucial to adhere to the relevant safety operating procedures and guidelines. Ensure that operators are equipped with the necessary safety awareness and operational skills to prevent any accidents. Additionally, consult

Carbon dioxide and liquid oxygen storage tanks are containers used for storing different gases, and they have some distinct physical properties:
Physical State: Carbon dioxide is a gas at room temperature and pressure, and it must be cooled and pressurized to become a liquid. Liquid oxygen is a liquid at room temperature, and it must be cooled further to solidify.
Boiling and freezing points: The boiling point of carbon dioxide is -78.5 degrees Celsius, with a freezing point at -56.6 degrees Celsius. The boiling point of liquid oxygen is -183 degrees Celsius, and its freezing point is -218.8 degrees Celsius. The boiling and freezing points of liquid oxygen are significantly lower than those of carbon dioxide.
Density: The density of liquid oxygen is relatively high, at about 1.14 grams per cubic centimeter. Carbon dioxide has a lower density, approximately 0.00198 grams per cubic centimeter. The density of liquid oxygen is about 570 times that of carbon dioxide.
Pressure: Liquid oxygen has a higher pressure, typically ranging from tens to hundreds of MPa (Megapascals). Carbon dioxide has a lower pressure, usually in the range of a few MPa.
Safety: Liquid oxygen has a high oxygen content, which is prone to causing fires and explosions. Carbon dioxide also poses asphyxiation risks at certain concentrations.
Note that carbon dioxide and liquid oxygen are highly flammable and explosive substances. Strict adherence to relevant safety operation procedures and standards, along with necessary safety measures, is required to ensure the tank's safety and stability during storage and use.
Zhongjie Special Equipment adheres to the great vision of "realizing employees' dreams, creating customer value, and striving for the prosperity and strength of our motherland," focusing on the development of green energy equipment industry, and dedicating high-value products and services to society!