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 operates seven business centers: boilers, deep-freeze containers, pressure vessels, central air conditioning, engineering installation, international trade, and the 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. The main workshop spans 83,000 square meters. Currently, there are 710 employees, including 247 engineers and technicians and 82 intermediate-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, as a "Specialized and New Small Giant Enterprise" by the Ministry of Industry and Information Technology.
To prevent the dangers associated with liquid oxygen storage tanks, the following precautions can be taken:
Safety Operations and Management: Establish and enforce stringent safety operations and management systems, including proper use of storage tanks, operational procedures, and safety training. Ensure operators possess the necessary safety awareness and skills, adhere to operational procedures, and minimize operational errors and the likelihood of accidents.
Regular inspections and maintenance: Conduct regular inspections and maintenance on liquid oxygen tanks, including visual inspections, pressure tests, and leak detection. Identify and address tank issues promptly to ensure safety and reliability.
Safety devices and protective equipment: Tanks should be equipped with necessary safety devices such as pressure relief valves, level alarms, and protective equipment such as fire barriers, explosion-proof devices, etc. These devices and equipment can take timely measures in abnormal situations to ensure the safety of the tank.
Fire Prevention Measures: Liquid oxygen has a high oxygen content and is prone to causing fires. Therefore, fire prevention measures such as firewalls and fire extinguishers should be set up around the storage tanks to prevent the spread and enlargement of fires.
Leakage Control and Emergency Response Plan: Establish a liquid oxygen storage tank leakage control and emergency response plan, including leakage control measures, emergency response procedures, and evacuation plans for personnel. In the event of a leakage incident, the plan allows for prompt action to control the leak and ensure personnel safety.
Training and Awareness Enhancement: Conduct regular safety training for liquid oxygen tank operators to enhance their safety awareness and emergency response capabilities. Strengthen safety

The liquid oxygen tank may deform during use. The following are common deformation defects in liquid oxygen tanks:
Elastic deformation: Liquid oxygen tanks may experience elastic deformation when subjected to external pressure or temperature changes. This deformation is typically reversible, meaning the tank will return to its original shape after the external pressure is removed or the temperature returns to normal.
Plastic Deformation: When a liquid oxygen tank is subjected to significant external force or pressure, it may experience plastic deformation. This deformation is irreversible, and the tank cannot return to its original shape. Plastic deformation can cause changes in the tank's shape, such as dents or warping.
Hot Deformation: Liquid oxygen storage tanks may experience hot deformation when subjected to high temperatures or temperature changes. Hot deformation can cause the tank to change shape, expand, or contract.
Cold Deformation: Liquid oxygen storage tanks may undergo cold deformation when exposed to low temperatures or temperature changes. Cold deformation can lead to shape alterations, shrinkage, or cracking of the tank.
These deformation defects may affect the structural integrity and safety of the liquid oxygen storage tank. Therefore, it is important to regularly inspect and assess the deformation of liquid oxygen storage tanks to ensure normal operation and safe use. If deformation defects are found, immediate repair or replacement measures should be taken to avoid further damage and safety risks.

The advantages of using liquid nitrogen quick-freezing technology with liquid nitrogen storage tanks include:
Rapid Freezing Speed: Liquid nitrogen has a low temperature of approximately -196 degrees Celsius. Utilizing 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 freezing can significantly reduce freezing time while preserving the quality and texture of the food.
Uniformly Frozen Effect: The liquid nitrogen rapid freezing technique achieves rapid and even freezing of food. Liquid nitrogen is喷射ed onto the surface of the food in a gaseous form, quickly absorbing heat and turning into a liquid, thereby ensuring even freezing of the food and avoiding crystallization and clumping during the freezing process.
Maintain Food Quality: Rapid freezing with liquid nitrogen 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 that effectively retain the food's moisture and nutritional content.
Flexibility and Adaptability: Liquid nitrogen tanks can be adjusted and controlled to cater to different types of food 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 results.
Environmental protection and energy-saving: The liquid nitrogen rapid freezing technology, compared to traditional freezing methods, can save more energy and resources. Liquid nitrogen evaporates quickly during the freezing process, causing environmental pollution and generating waste water and gas.
Be mindful to adhere to the relevant safety operation procedures and guidelines when using liquid nitrogen tanks for flash freezing. Ensure that operators are equipped with the necessary safety awareness and operational skills to prevent any accidents. Additionally, consult

Prior to using the liquid oxygen tank, the following preparations must be made:
Safety Inspection: Ensure the tank and its surrounding environment are safe. Check for any damage, leaks, or other potential hazards. Make sure there are no flammable substances or other hazardous materials around 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 the 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 proper operation.
Valve Operation: Check that the tank valves and connections are functioning properly. Ensure the valves open and close smoothly and reliably. Adjust the valves' open and closed positions as needed.
Safety equipment: Inspect the safety equipment around the storage tanks, such as fire separation areas and alarm systems, to ensure they are functioning properly.
Operator Training: Ensure operators are proficient in the safe operation of liquid oxygen storage tanks.
Our company attaches great importance to technological innovation and R&D design, boasting 1 city-level enterprise technology center in Heze City. We have established testing facilities for non-destructive testing, physical and chemical testing, welding testing, hydrostatic testing, and more. We are equipped with over 600 pieces of 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 recovery, have successively been included in multiple Shandong Province Department of Industry and Information Technology scientific and technological innovation projects, key provincial projects, and Heze City innovative 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. Our technical team, in collaboration with Professor Yajiang Li of Shandong University, has developed deep cryogenic vessel processing technology using the internationally recognized plasma arc + wire filling argon arc welding (PAW-GTAW) technique. This technology has been appraised at the provincial level and has reached international standards in the field of deep cryogenic vessel manufacturing. Choose ZJ Special Equipment, let's create brilliance together!