Shandong Zhongjie Special Equipment specializes in: fuel (gas) boilers, organic heat carrier boilers, biomass boilers, waste heat recovery boilers, and other boiler products; vacuum insulation cryogenic pressure vessels such as LNG storage tanks, oxygen/nitrogen/argon storage tanks, and CO2 storage tanks; pressure vessel products including denitrification engineering equipment, heat storage and energy storage equipment, and complete chemical equipment sets; central air conditioning and HVAC equipment such as ground (water) source heat pumps, air source units, water-cooled screw units, and air-cooled modular units. Planned products include large-scale energy centers, LNG transport vehicles, LNG tank containers, and other green energy equipment.
Carbon dioxide is widely used as a shielding gas in metal welding processes during welding. The following are the main applications of carbon dioxide in welding: Gas Metal Arc Welding (GMAW): Carbon dioxide is commonly used as a shielding gas in the GMAW welding process. In GMAW welding, the arc generates high temperatures in the welding area, which can also cause oxidation reactions with oxygen and water vapor, leading to reduced weld quality. By injecting carbon dioxide gas into the welding area, a protective atmosphere is formed, preventing oxygen and water vapor from entering, thereby improving the quality and strength of the weld. Mixed Gas Shielding Welding (GMAW): Carbon dioxide is also often mixed with other gases (such as argon) to form mixed gas shielding welding. The use of mixed gases can adjust the arc stability, molten pool formation, and weld quality during welding, enhancing the welding effect. Gas Shielded Brazing: Carbon dioxide can also be used in the gas shielded brazing process. During brazing, the carbon dioxide gas provides a protective atmosphere, preventing oxidation and contamination in the brazing area, ensuring the quality of the brazed joint. Gas Shielded Cutting: Carbon dioxide can also be used in the gas shielded cutting process. In gas shielded cutting, by injecting carbon dioxide gas into the cutting area, a protective atmosphere is formed, preventing oxidation and contamination in the cutting area, improving the quality and speed of cutting. It should be noted that the application of carbon dioxide in welding needs to be adjusted and optimized according to specific welding materials, methods, and requirements. When using carbon dioxide for welding, it is necessary to follow relevant safety operating procedures and guidelines to ensure the safety and quality of the welding process.

Carbon dioxide storage tanks feature the following safety technical characteristics: - High-strength materials: Carbon dioxide storage tanks are typically made from high-strength steel or alloy materials to withstand stress and loads under high pressure and low-temperature environments. - Safety valves and pressure relief devices: The tanks are equipped with safety valves and pressure relief devices to control internal pressure and prevent overpressure and explosions. When the internal pressure exceeds the set value, the safety valve will automatically open to release pressure. - Insulation layer: An insulation layer is installed inside the tank to reduce heat conduction and liquid evaporation. The insulation layer usually consists of multi-layer structures, including thermal insulation materials and an external protective layer, to maintain stable internal tank temperature. - Level monitoring and control: The tanks are fitted with level monitoring devices to monitor the liquid level inside. Timely monitoring and control of the level ensure the liquid storage within the tank remains within a safe range. - Fire and explosion prevention measures: The tanks implement fire and explosion prevention measures such as fire-resistant coatings, fire-resistant isolation areas, and explosion-proof devices to prevent fires and explosions. - Leak detection and alarm system: The tanks are equipped with leak detection and alarm systems to promptly detect and alert of any tank leaks. Quick response and handling can reduce the safety risks caused by leaks. - Regular inspections and maintenance: Tanks require regular inspections and maintenance, including visual inspections, valve maintenance, and pressure tests, to ensure the tank's safety performance and reliability. - It should be noted that the specific safety technical characteristics of carbon dioxide storage tanks may vary depending on the type of tank and its application. When using carbon dioxide storage tanks, relevant regulations and standards should be followed.

The internal structure of carbon dioxide storage tanks typically includes the following main components: Tank Shell: The tank shell is the primary container for storing carbon dioxide, usually made of carbon steel or stainless steel. The shell is designed with sufficient strength and sealability to withstand internal pressure and loads. Lining Layer: To prevent direct contact between carbon dioxide and the tank shell, avoiding corrosion and contamination, the interior of the tank is often coated with a lining layer. The lining layer is typically made of corrosion-resistant materials such as glass fiber reinforced plastics, polyester resins, etc. Support Structure: To support the weight of the tank and maintain stability, a support structure is usually set up inside the tank. This can include support legs, supports, etc., to support the bottom and side walls of the tank. Internal Accessories: The tank is also equipped with some important accessories, such as level gauges, pressure sensors, temperature sensors, safety valves, etc. These accessories are used to monitor and control the liquid level, pressure, and temperature inside the tank to ensure safe operation. Pressure Relief Device: To prevent excessive internal pressure, the tank is usually equipped with a pressure relief device, such as a safety valve. When the internal pressure of the tank exceeds the set value, the pressure relief device will automatically open to release pressure, protecting the safety of the tank. Inlet and Outlet Piping: The tank also has inlet and outlet piping for injecting and discharging carbon dioxide. These pipes are typically connected to external supply or consumption systems to facilitate the storage and use of carbon dioxide. The above is the general internal structure of carbon dioxide storage tanks, and the specific structural design and configuration may vary depending on the tank's purpose and specifications. When using and maintaining the tank, it is necessary to...

For the maintenance and care of low-temperature liquid storage tanks, here are some tips and precautions: - Regular Inspections: Conduct regular checks of the tank's exterior, internal lining, valves, and pipeline connections. Pay attention to signs of corrosion, cracks, or oil leakage. - Cleaning and Draining: Regularly clean the interior of the tank to remove accumulated impurities and sediments. Also, regularly drain the tank to remove liquid and gas impurities. - Corrosion Prevention: The outer shell and inner lining of the low-temperature liquid storage tank should be treated with corrosion prevention measures. Regularly inspect and maintain the corrosion prevention layer or coating to ensure its integrity and effectiveness. - Temperature and Pressure Control: The temperature and pressure of the low-temperature liquid storage tank should be controlled within the design limits. Avoid excessive or low temperatures and pressures that may damage the tank. - Safety Component Inspection: Check the tank's safety components, such as safety valves, pressure sensors, and temperature sensors, to ensure they are functioning properly. Verify that their set parameters meet requirements. - Maintenance of Level Measurement System: Regularly inspect and calibrate the level measurement system to ensure accuracy and reliability. Clean or replace level sensors as needed. - Fire Prevention Measures: Fire prevention is crucial for low-temperature liquid storage tanks. Ensure that fire protection facilities around the tank are in good condition and conduct fire drills regularly. - Regular Assessments and Monitoring: Regularly assess and monitor the tank, including structural integrity, corrosion, and safety. Take appropriate maintenance and repair measures based on assessment results. - Operator Training: Operators should receive training to understand the characteristics, operational requirements, and safety measures of low-temperature liquid storage tanks. Training should include safe operation, leak handling, and emergency procedures.
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