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, and complete chemical equipment; 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 the 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: Pressure vessels with operating pressures of 10 MPa (megapascals) or higher, such as steam boilers and pressure vessels. - Category II pressure vessels: Pressure vessels with operating pressures between 0.1 MPa and 10 MPa, such as air compressors and liquefied gas storage tanks. - Category III pressure vessels: Pressure vessels with operating pressures between 0.05 MPa and 0.1 MPa, such as storage tanks. - Category IV pressure vessels: Pressure vessels with operating pressures below 0.05 MPa, such as gas cylinders. Based on this classification, carbon dioxide storage tanks typically have operating pressures above 0.1 MPa, thus falling under Category II pressure vessels. It is important to note that specific classification criteria may vary due to different regional regulations and standards. When using and managing carbon dioxide storage tanks, it is essential to adhere to the corresponding legal and standard requirements.

The working principle of carbon dioxide storage tanks involves the compression and liquefaction of carbon dioxide. Below is a brief description of the working principle of carbon dioxide storage tanks: Compression: Carbon dioxide gas is first compressed to a higher pressure by a compressor. This process compresses the gas into a high-pressure state, allowing it to be converted into a liquid. Cooling: The compressed carbon dioxide gas enters a cooler, where it is rapidly cooled through a cooling agent or system within the cooler. This process cools the gas below its boiling point, converting it into a liquid. Storage: The cooled carbon dioxide liquid is stored in sealed tanks, which typically have insulation to reduce the evaporation of liquid carbon dioxide and maintain a low temperature. The internal pressure of the tank is maintained within a certain range to ensure stable storage of the liquid carbon dioxide. Supply: When carbon dioxide is needed, it can be extracted from the tank through valves and piping systems. By controlling the opening and flow of the valves, liquid carbon dioxide can be supplied to the required equipment or system. It should be noted that the working principle of carbon dioxide storage tanks may vary depending on specific design and manufacturing. When using carbon dioxide storage tanks, follow the operating manual and safety guidelines, and cooperate with local regulatory agencies and personnel to ensure the safety and reliability of the tank.

The primary reason for pre-cooling a carbon dioxide tank before use is to ensure that the carbon dioxide inside remains in a liquid state and maintains a stable temperature during storage and supply. The pre-cooling process typically involves the following steps: 1. Tank Cooling: Before the tank is put into service, it must be cooled to a sufficiently low temperature to convert the carbon dioxide from a gas to a liquid. This can be achieved by injecting a cooling medium (such as liquid nitrogen) into the tank or by using an external cooling device. 2. Tank Pre-filling: After the tank has been cooled, liquid carbon dioxide must be pre-filled to fill the tank and maintain a certain pressure. The purpose of pre-filling is to provide an adequate supply of carbon dioxide during storage and supply and to keep the tank pressure stable. By pre-cooling, the liquid state of the carbon dioxide inside the tank can be ensured, preventing premature evaporation and energy loss. Additionally, pre-cooling helps to lower the tank temperature in advance, reducing carbon dioxide evaporation and pressure fluctuations, thereby improving the tank's operational efficiency and safety. It should be noted that the specific methods and requirements for pre-cooling may vary depending on the tank design and usage scenario. When performing pre-cooling operations, it is necessary to follow relevant safety operation procedures and standards to ensure the safety and effectiveness of the operation.

Carbon dioxide tanks are widely used in numerous industries. Here are some common applications: - Food and Beverage Industry: Carbon dioxide tanks are utilized in the production process of carbonated drinks, beer, soda, etc. in the food and beverage industry. Carbon dioxide is injected into the beverages to enhance their bubbles and taste. - Industry: In the industry, carbon dioxide tanks are used for applications such as anesthesia, respiratory care, and first aid. Liquid carbon dioxide can be used to produce refrigerants for freezing and preserving biological samples and tissues. - Fire Extinguishing: Carbon dioxide tanks are used in fire suppression systems within the fire service. Carbon dioxide is released into the fire scene to extinguish flames by suppressing oxygen supply. - Gas Supply: Carbon dioxide tanks are also used to supply carbon dioxide gas in industrial and commercial sectors. These gases can be applied in welding, gas shielding, semiconductor manufacturing, water treatment, and more. - Climate Control: Carbon dioxide tanks are employed in greenhouses and indoor plant cultivation to control and increase the concentration of carbon dioxide for plant growth. - Additionally, carbon dioxide tanks can be used in other industries, such as the automotive industry (for airbag systems) and industry (for propellants and gas supply). It should be noted that different industries may have varying requirements and applications for carbon dioxide tanks. When using carbon dioxide tanks, it is essential to comply with relevant regulations and standards, ensuring that the design, manufacturing, and use of the tanks meet the corresponding requirements.
ZJ Special Equipment adheres to the grand vision of "Realizing Employees' Dreams, Creating Customer Value, and Striving for the Prosperity and Strength of Our Motherland," and is dedicated to the development of the green energy equipment industry. We commit to society with high-quality products and services at competitive prices!