Shandong Zhongjie Special Equipment's main products include: fuel (gas) boilers, organic heat carrier boilers, biomass boilers, waste heat boilers, and other boiler products; vacuum insulation cryogenic pressure vessels such as LNG tanks, oxygen/nitrogen/argon tanks, CO2 tanks; pressure vessel products such as denitrification engineering equipment, heat storage and energy storage equipment, 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.
According to China's "Regulations for Safety Supervision of Pressure Vessel Technology," carbon dioxide storage tanks are classified as Category II pressure vessels. The regulations categorize pressure vessels as follows: - Category I pressure vessels: Those with working pressures of 10 MPa (megapascals) or higher, such as steam boilers and pressure vessels. - Category II pressure vessels: Those with working pressures between 0.1 MPa and 10 MPa, such as air compressors and liquefied gas storage tanks. - Category III pressure vessels: Those with working pressures between 0.05 MPa and 0.1 MPa, such as storage tanks. - Category IV pressure vessels: Those with working pressures below 0.05 MPa, such as gas cylinders. Based on this classification, carbon dioxide storage tanks typically have working pressures above 0.1 MPa, thus falling under Category II pressure vessels. It's important to note that specific classification criteria may vary due to different regional regulations and standards. When using and managing carbon dioxide storage tanks, one should adhere to the corresponding regulatory and standard requirements.

The reasons for not allowing a CO2 storage tank to remain empty for extended periods are primarily as follows: 1. Safety Risks: CO2 is a high-pressure gas and must maintain a certain pressure within the tank to remain in a liquid state. Releasing CO2 from the tank into the atmosphere over a long period can lead to a drop in tank pressure, potentially causing structural failure or explosions, posing safety hazards. 2. Resource Wastage: CO2 is a valuable resource with extensive applications in industry and other sectors. Allowing the CO2 storage tank to remain empty for long durations is a waste of resources and does not align with sustainable development principles. 3. Environmental Impact: CO2 is a greenhouse gas, and releasing it into the atmosphere over a long period increases the concentration of CO2 in the atmosphere, exacerbating climate change and environmental issues. Therefore, to ensure safety, conserve resources, and protect the environment, CO2 storage tanks should be used and managed according to specified procedures and requirements, avoiding long-term emptiness. When CO2 in the tank is no longer needed, appropriate disposal methods should be employed, such as recycling, reuse, or safe discharge.

Liquid CO2 Filling of Storage Tanks: The process of filling liquid CO2 into storage tanks. Here are some precautions to consider for CO2 tank filling: Safety Operations: Adhere to relevant safety procedures during CO2 tank filling. Operators should be trained and aware of the tank's characteristics and safety concerns to ensure safe operations. Tank Capacity Control: Ensure that the filling process does not exceed the tank's rated capacity. Overfilling can lead to excessive pressure and increased safety risks. Filling Rate Control: Maintain a moderate filling rate to avoid both too fast and too slow filling. Excessive speed can cause high internal pressure, while slow speed can lead to extended filling times. Temperature Control: Control the temperature of the liquid CO2 during filling. High temperatures can cause rapid evaporation, and low temperatures can lead to solidification. Pressure Control: Monitor and control the internal pressure of the tank during filling. Excessive pressure can cause tank rupture or leakage, while low pressure can result in inadequate filling. Level Monitoring: Regularly monitor the tank's level during filling to ensure accurate measurements and avoid overfilling or underfilling. Pressure Relief Devices: The tank should be equipped with pressure relief devices, such as safety valves, to control internal pressure. The set pressure should meet relevant requirements and be inspected and maintained regularly. Environmental Protection: Be mindful of environmental protection during filling to prevent CO2 leakage and contamination. Use appropriate protective measures, such as sealed connections and protective devices. These are some precautions for CO2 tank filling. Follow relevant safety regulations and standards during filling operations, and consult with experts to ensure safety and effectiveness.

Construction features of carbon dioxide storage tanks mainly include the following aspects: Material selection: Carbon dioxide storage tanks are typically made of carbon steel or stainless steel to ensure their corrosion resistance and pressure-bearing properties. Welding technology: The welding process of the tank is crucial for its quality and safety. The welding process should comply with relevant standards and specifications to ensure the quality and strength of the welds. Corrosion prevention measures: Due to the corrosive nature of carbon dioxide, both the internal and external surfaces of the tank should be treated for corrosion prevention. Common corrosion prevention measures include applying anti-corrosion paint, coating with anti-corrosion layers, or using anti-corrosion coatings. Safety valves and pressure sensors: The tank should be equipped with safety valves and pressure sensors to monitor and control the internal pressure of the tank, ensuring safe operation. Steps for correctly installing a carbon dioxide storage tank are as follows: Site preparation: Select an appropriate site for installation, ensuring the site is level, stable, and meets safety distance requirements. Clear the site to ensure there are no obstructions or fire sources. Foundation construction: Construct the foundation according to the size and weight of the tank. The foundation should have sufficient strength and stability to support the weight and pressure of the tank. Tank installation: Place the tank on the foundation, ensuring there is adequate padding and fastening equipment between the tank and the foundation. Connect and secure the tank according to its design requirements. Pipe connection: Connect the tank to the piping system as needed. Ensure the connections are sealed properly to prevent leaks. Safety equipment installation: Install the required safety equipment for the tank, such as safety valves, pressure sensors, and temperature sensors. Ensure these facilities are correctly installed and connected.
Zhongjie Special Equipment upholds the grand vision of "realizing employees' dreams, creating value for customers, and striving for the prosperity and strength of our motherland," and is dedicated to the development of the green energy equipment industry. We offer products and services with high cost-performance to contribute to society!