Shandong Zhongjie Special Equipment Co., Ltd. (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 sites on Jinnan Road, East Changjiang Road, and Bohai Road, covering a total of 200,000 square meters, with the main workshop area at 83,000 square meters. It currently employs 710 people, including 247 engineering and technical personnel 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.
To prevent risks associated with liquid oxygen tanks, the following precautions can be taken:
Safety Operations and Management: Establish and implement stringent safety operations and management systems, including proper use of tanks, operational procedures, safety training, etc. Ensure that operators have 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 checks and maintenance on liquid oxygen tanks, including visual inspections, pressure tests, and leak detection. Promptly identify and address any issues with the tanks to ensure their safety and reliability.
Safety devices and protective equipment: Tanks should be equipped with necessary safety devices, such as pressure relief valves and level alarms, as well as protective equipment, like firewalls and explosion-proof devices. These devices and equipment can take timely action during abnormal conditions to ensure the safety of the tank.
Fire Prevention Measures: Liquid oxygen contains a high oxygen concentration, which 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 expansion of fires.
Leakage Control and Emergency Response Plan: Establish a liquid oxygen tank leakage control and emergency response plan, including leakage control measures, emergency response procedures, and evacuation plans. In the event of a leakage incident, the plan allows for rapid action to control the leak and ensure personnel safety.
Training and Awareness Enhancement: Conduct regular safety training for operators of liquid oxygen storage tanks to enhance their safety awareness and emergency response capabilities. Strengthen safety

Liquid oxygen tanks may deform during use. The following are common deformation defects in liquid oxygen tanks:
Elastic deformation: The liquid oxygen tank may undergo elastic deformation when subjected to external pressure or temperature changes. This deformation is typically reversible, meaning the tank will return to its original shape once 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 undergo 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 tanks may experience cold deformation when subjected to low temperatures or temperature changes. Cold deformation can lead to changes in the tank's shape, shrinkage, or cracking.
These deformation defects may affect the structural integrity and safety of liquid oxygen storage tanks. Therefore, it is important to regularly inspect and evaluate the deformation of liquid oxygen storage tanks to ensure their normal operation and safe use. If deformation defects in the tank are found, prompt repair or replacement measures should be taken to avoid further damage and safety risks.

The use of liquid nitrogen storage tanks in the liquid nitrogen rapid freezing technology offers several advantages:
Rapid Freezing Speed: Liquid nitrogen has a low temperature of approximately -196 degrees Celsius. Utilizing liquid nitrogen tanks 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.
Uniform freezing effect: The liquid nitrogen rapid freezing technology achieves fast and even freezing of food. Liquid nitrogen is喷射ed onto the food surface in a gaseous form, quickly absorbing heat and transforming into a liquid state, thereby ensuring even freezing of the food and preventing crystallization and lumping during the freezing process.
Maintain Food Quality: Quick-freezing with liquid nitrogen rapidly chills food, minimizing crystallization and caking during the freezing process, thereby preserving the quality and texture of the food. During the quick-freezing process, liquid nitrogen swiftly lowers the surface temperature of the food, forming minute freezing 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 injection speed and angle of liquid nitrogen can be adjusted based on the size, shape, and freezing needs of the food to achieve optimal freezing results.
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 waste gas.
Note that when using liquid nitrogen tanks for flash freezing, it is essential to adhere to the relevant safety operation procedures and guidelines. Ensure that operators possess the necessary safety awareness and operational skills to prevent accidental incidents. In addition, 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 to the tank. 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 fasteners. Ensure there is no visible damage or corrosion. Check that the insulation layer is intact and undamaged.
Liquid Oxygen Filling: Utilize liquid oxygen delivery equipment to fill the storage tank with liquid oxygen. Ensure that the flow rate and pressure of the liquid oxygen are maintained within a safe range during the filling process.
Pressure Control: Tanks should be equipped with pressure control devices to ensure the internal pressure of the tank is within a safe range. Inspect and adjust the pressure control devices to ensure their proper operation.
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 open and close positions of the valves as needed.
Safety Equipment: Inspect the safety equipment around the storage tanks, such as fire isolation 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.
Our company attaches great importance to technological innovation and R&D design. We have one municipal-level enterprise technology center in Heze City, equipped with testing facilities for non-destructive testing, physical and chemical testing, welding testing, hydrostatic testing, etc. We have over 600 types 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 utilization, have successively been included in multiple Shandong Provincial Department of Industry and Information Technology science and technology innovation projects, Shandong Provincial key projects, and Heze City innovation and excellence projects. We have cumulatively obtained 27 authorized utility model patents, 16 authorized invention patents, 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 container processing technology using the international plasma arc + filler wire tungsten inert gas arc combination welding (PAW-GTAW) technique. The provincial-level scientific and technological achievement appraisal has determined that our technology level in deep cryogenic container manufacturing has reached international standards. Choose Zhongjie Special Equipment, and let's create brilliance together!