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 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, as a "Specialized and New Small Giant Enterprise" by the Ministry of Industry and Information Technology.
Pressure Vessel Standards: Liquid carbon dioxide storage tanks are generally considered pressure vessels, and their design, manufacture, and use should comply with the relevant pressure vessel standards. In China, commonly used pressure vessel standards include GB150 "Steel Pressure Vessels" and GB18435 "Tanks." Safety Standards: The use of liquid carbon dioxide storage tanks must adhere to relevant safety standards and regulations. For instance, in China, the safe operation of liquid carbon dioxide storage tanks should follow standards such as GB50028 "Design Code for Petroleum and Chemical Enterprises" and GB50016 "Design Code for Building Fire Prevention." Inspection and Testing Standards: The inspection and testing of liquid carbon dioxide storage tanks should comply with the corresponding standards and regulations. For example, regular inspections of liquid carbon dioxide storage tanks can refer to GB/T 19638 "Regulation for Periodic Inspection of Pressure Vessels." Environmental Protection Standards: The use of liquid carbon dioxide storage tanks should comply with relevant environmental protection standards and regulations. For example, in China, the exhaust emissions from liquid carbon dioxide storage tanks should meet the standards such as "Emission Standards for Air Pollutants."

Carbon dioxide (CO2) and liquid oxygen (LOX) storage tanks are equipment used for storing different gases, with some physical distinctions: - Physical State: CO2 is a gas at room temperature and requires low temperatures and high pressures to become liquid. LOX is a liquid at room temperature and can remain in liquid form without special conditions. - Storage Temperature: The liquid CO2 storage temperature typically ranges from -40°C to -78.5°C, while the liquid oxygen storage temperature usually ranges from -183°C to -183.15°C. The storage temperature for LOX is lower, necessitating more stringent insulation measures. - Storage Pressure: The liquid CO2 storage pressure is usually between 5-20 MPa, while the liquid oxygen storage pressure is typically between 0.2-2 MPa. The storage pressure for LOX is lower. - Density: The density of liquid CO2 is approximately 0.8 g/cm³, while the density of liquid oxygen is about 1.14 g/cm³. The density of liquid oxygen is greater. - Safety: LOX has a high oxygen content, making it highly flammable and oxidizing, requiring stricter safety measures. CO2 is relatively safe but can still pose health risks at high concentrations.

When cooling carbon dioxide storage tanks, be mindful of the following points and familiarize yourself with the basic steps of the cooling process: Cautionary Notes: - Safety: Pay attention to safety during the cooling process to ensure the safety of the operators and the surrounding environment. Adhere to relevant safety operation procedures and standards, and use appropriate personal protective equipment. Equipment Selection: Choose the appropriate cooling equipment and tools, such as cooling media (e.g., liquid nitrogen), coolers, and cooling systems. Select the suitable cooling equipment based on the tank's size and requirements. Temperature Control: Control the temperature during the cooling process to avoid overcooling or insufficient temperature. Determine the appropriate cooling temperature range based on the tank's design requirements and working conditions. Cooling Process Analysis: - Preparations: Ensure there are no residual gases or impurities inside the tank to avoid affecting the cooling effect. Check the tank's sealing and the operation status of the safety valve. Cooling Media Injection: Inject the cooling media (e.g., liquid nitrogen) into the tank to lower the tank's temperature. Control the injection speed and amount during the process to avoid over-injection and excessive pressure. Cooling Time: Determine the cooling time based on the tank's size and requirements. The cooling time usually needs to be long enough to ensure that the carbon dioxide inside the tank is fully cooled and liquefied. Temperature Monitoring: Regularly monitor the tank's temperature during the cooling process to ensure it remains within the appropriate range. Use temperature sensors or infrared thermometers for monitoring. Cooling Completion: The cooling process is complete when the tank's temperature reaches the predetermined cooling requirements. At this point, the carbon dioxide inside the tank should be in a liquid state. Note that the specific cooling process and steps may vary due to different tank designs and usage scenarios. When performing cooling operations, follow relevant safety operation procedures and standards to ensure safety and effectiveness.

Carbon dioxide storage tank standard parameters may vary depending on different design and application requirements. Here are some common standard parameters: - Tank Capacity: The capacity of a carbon dioxide storage tank is typically expressed in kiloliters (L) or cubic meters (m). Common capacity ranges vary from a few thousand to tens of thousands of liters. - Working Pressure: The working pressure of a carbon dioxide storage tank is usually around 20 to 25 MPa (megapascals) at normal temperatures, with the specific pressure determined by application needs and design standards. - Design Temperature: The design temperature of a carbon dioxide storage tank is usually within a low-temperature range, generally between -40°C and -60°C, to accommodate the liquefaction and storage requirements of carbon dioxide. - Material: Carbon dioxide storage tanks are commonly made of high-strength steel or alloy materials to withstand stress and loads under high pressure and low-temperature environments. - Insulation Layer: The tank is internally insulated to reduce heat transfer and liquid evaporation. The insulation layer is typically a multi-layer structure, including thermal insulation materials and an external protective layer. - Safety Valve and Pressure Relief Device: The tank is equipped with a safety valve and pressure relief device to control internal tank pressure and prevent overpressure and explosions. - Level Monitoring and Control: The tank is fitted with level monitoring equipment to monitor the liquid level inside. Timely monitoring and control of the level ensure that the liquid storage volume within the tank remains within a safe range. - It should be noted that specific standard parameters for carbon dioxide storage tanks may vary due to different design standards, application requirements, and manufacturers. When selecting and using carbon dioxide storage tanks, it is important to consider these factors.
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 various 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 selected for 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 accumulated 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 Li Yajiang of Shandong University, has developed deep cryogenic container processing technology using the international plasma arc + wire-filled tungsten inert gas arc welding (PAW-GTAW) technology. This technology has been appraised as reaching international standards in the field of deep cryogenic container manufacturing at the provincial level. Choose Zhongjie Special Equipment, and let's create brilliance together!