Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) was established in 2001, located at No. 2218 Jinan 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 operates seven business centers: boiler manufacturing, deep-freezing containers, pressure vessels, central air conditioning, engineering installation, international trade, and Internet of Things. It has three factory sites on Jinan 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. The company currently employs 710 people, including 247 engineers and technicians and 82 intermediate-level technical personnel. 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.
When filling liquid carbon dioxide into storage tanks, attention should be given to the following aspects: Safety Operation: During the filling process, it is mandatory to adhere to relevant safety operation procedures and standards. Operators must receive training to understand the operation requirements and safety measures of the filling equipment and operate strictly according to the procedures. Tank Inspection: Prior to filling, the tank must be inspected to ensure its integrity and safety. Check the tank's appearance, sealing, valves, and pipeline connections, and promptly repair or replace any abnormalities or damages found. Filling Equipment: Select appropriate filling equipment, ensuring it meets relevant standards and requirements. The filling equipment should have a safe and reliable design and operational functionality to ensure the safety and efficiency of the filling process. Filling Speed Control: Controlling the filling speed is crucial. Excessive filling speed can lead to increased tank pressure, enhancing safety risks. The filling speed should be controlled based on the tank's capacity and design requirements to ensure safe filling. Pressure Control: The tank's pressure must be strictly controlled during the filling process. The filling equipment should be equipped with pressure sensors and safety valves to ensure the internal pressure of the tank remains within a safe range. Leak Protection: The sealing integrity of valves and pipelines must be ensured during the filling process to prevent carbon dioxide leakage. Regularly inspect and replace seals, and promptly address any leakage situations. Monitoring and Recording: Real-time monitoring and recording of key parameters such as pressure, temperature, and liquid level should be conducted during the filling process. This helps in the timely detection of anomalies and allows for corresponding adjustments and handling. It is important to note that filling carbon dioxide storage tanks should be performed by qualified operators and in accordance with relevant safety operation procedures and standards. Seek advice and guidance from knowledgeable professionals.

Key measures to ensure the quality of CO2 storage tanks include the following aspects: - Selecting qualified suppliers: Choose suppliers with a good reputation and experience, ensuring their provided tanks meet relevant quality standards and regulations. This can be achieved by evaluating suppliers' qualifications, referencing customer reviews, and conducting on-site inspections. - Strict quality control: Implement rigorous quality control measures during the manufacturing process of the tanks. This involves selecting and inspecting raw materials, controlling production processes, monitoring process parameters, product testing, and ensuring the tanks meet quality requirements. - Compliance with standards and regulations: The design, manufacturing, and installation of the tanks should comply with relevant standards and regulations, such as industry standards and regulations. These include structural design, material selection, welding techniques, corrosion prevention measures, safety valves, and pressure sensor configurations. - Regular inspections and maintenance: Tanks require regular inspections and maintenance during use to ensure safety and reliability. This includes checking the tank's appearance, seals, valves, and pipe connections, conducting regular pressure tests and leak detections, and addressing abnormal situations promptly. - Establishing a quality management system: Establish a comprehensive quality management system, including quality control processes, documentation, quality training, and internal audits. By establishing a quality management system, tank quality control and continuous improvement can be ensured. - Third-party testing and certification: Delegate tank testing and certification to third-party institutions to verify quality and compliance. Third-party testing and certification agencies are typically impartial and can provide objective assessments and certification results. - Through the implementation of these measures, the quality of CO2 storage tanks can be effectively ensured, enhancing their safety and reliability.

CO2 flooding is a commonly used enhanced oil recovery technique, designed to increase the recovery rate of oil fields. It works by injecting CO2 gas into the reservoir to alter its physical and chemical properties, thereby promoting fluid flow and enhancing recovery. The working principle of CO2 flooding is as follows: Dissolution Principle: CO2 has a high solubility in oil. When CO2 gas is injected into the reservoir, it dissolves within the oil, reducing its viscosity and surface tension, making it more fluid. Expulsion Drive Principle: After CO2 gas is injected into the reservoir, it expands to form a gas phase, increasing the internal pressure of the reservoir and pushing the oil towards the wellbore. Additionally, CO2's high permeability can improve the reservoir's permeability, enhancing fluid flow. Chemical Reaction Principle: CO2 reacts with certain components in the oil, producing soluble substances that further reduce viscosity and improve fluidity. CO2 flooding technology offers certain advantages in oilfield development, such as: Environmental Friendliness: CO2 is a clean, non-toxic, and renewable gas. Using CO2 for flooding can reduce environmental pollution. Economic Viability: CO2 flooding can increase the recovery rate of oil fields, boost production, and thus enhance economic benefits. Sustainability: CO2 can be separated from the atmosphere or captured and stored from industrial flue gases, enabling the recycling of CO2 and ensuring sustainability. It is important to note that the application of CO2 flooding technology requires consideration of reservoir characteristics, geological conditions, and economic feasibility factors. A thorough reservoir evaluation and engineering design must be conducted before implementing CO2 flooding to ensure the effectiveness and safety of the technology.

Carbon dioxide is widely used as a shielding gas in metal welding processes. Here are the main applications of carbon dioxide in welding: 1. Gas Metal Arc Welding (GMAW): Carbon dioxide is commonly used as the 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. 2. Mixed Gas Metal Arc Welding (GMAW): Carbon dioxide is often mixed with other gases (such as argon) to form a mixed gas shielding welding. The use of mixed gases can adjust the arc stability, molten pool formation, and weld quality during the welding process, enhancing the welding effect. 3. Gas Shielded Brazing: Carbon dioxide can also be used in gas shielded brazing processes. 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. 4. Gas Shielded Cutting: Carbon dioxide can also be used in gas shielded cutting processes. In gas shielded cutting, injecting carbon dioxide gas into the cutting area forms a protective atmosphere, preventing oxidation and contamination, and improving the quality and speed of the cut. It is important to note 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 operation procedures and guidelines to ensure the safety and quality of the welding process.
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