Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) was established in 2001, located at No. 2218 Jinnan Road, 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-freeze containers, pressure vessels, central air conditioning, engineering installation, international trade, and Internet of Things. It has three manufacturing 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 engineering and technical staff 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 Department of Industry and Information Technology. In June 2022, it was recognized as a "Gazelle Enterprise in Shandong Province" and in August 2022, it was identified as a "Specialized and New Small Giant Enterprise" by the Ministry of Industry and Information Technology.
Carbon dioxide has wide applications in the field of food freezing. Here are some common uses of carbon dioxide in food freezing: 1. Freezing Food Processing: Carbon dioxide is commonly used in the processing of frozen foods. By exposing food to liquid carbon dioxide, temperatures can be rapidly reduced, achieving quick freezing. This rapid freezing effectively preserves the quality, texture, and nutritional content of the food. 2. Freezing Storage: Carbon dioxide is also used for the freezing storage of food. During the storage process, food is placed in a low-temperature environment, and the temperature is lowered below the freezing point using the refrigerating effect of carbon dioxide, thereby extending the shelf life of the food. 3. Freezing Transportation: Carbon dioxide plays a crucial role in the freezing transportation of food. By using carbon dioxide freezing technology during transportation, the low-temperature state of the food can be maintained, preventing quality loss. 4. Freezing Display: In the retail food industry, carbon dioxide is also used in refrigerated display cabinets. By injecting carbon dioxide gas into the display cabinets, the low-temperature state of the food can be maintained, showcasing the food while keeping it fresh and of high quality. Compared to traditional freezing techniques, carbon dioxide freezing offers advantages such as faster freezing, better freezing quality, and less impact on food quality. However, safety operation is crucial when using carbon dioxide freezing technology to avoid leaks and harm to humans. Therefore, when using carbon dioxide for food freezing, it is necessary to follow relevant safety operation procedures and guidelines.

When using carbon dioxide tanks, the following protective procedures must be followed to ensure safety: Tank Operator Training: All operators must receive training to understand the characteristics, operational requirements, and safety measures of carbon dioxide tanks. Training should include safe tank operation, leak handling, emergency procedures, etc. Safety Operating Procedures: Establish and adhere to relevant safety operating procedures, including tank start-up, shutdown, inspections, and maintenance. Operators should operate according to the procedures to ensure safe tank operation. Leak Handling: Develop a leak handling program including leak detection, emergency shutdown, and source isolation measures. Operators should be familiar with the leak handling program and be able to respond quickly and correctly to leak incidents. Fire Prevention Measures: Carbon dioxide is a flammable substance; fire prevention measures must be observed during use. Smoking, open flame operations, or placing flammable items near the tank is prohibited. Ensure that fire protection equipment is in good condition around the tank and fire drills are conducted regularly. Waste Gas Emission: When using carbon dioxide tanks, waste gases should be discharged properly to avoid accumulation in enclosed spaces, which can cause asphyxiation and safety risks. Ensure the waste gas emission system is unobstructed and functioning correctly. Regular Inspections and Maintenance: Regularly inspect the tank's appearance, sealing, valves, and pipe connections. In case of any abnormalities or damage, repairs or replacements should be made promptly. Additionally, regularly check and maintain the safety valves, pressure sensors, and other accessories. Emergency Response Plan: Develop and implement an emergency response plan, including procedures for handling leaks, evacuation, and first aid measures. Operators should be familiar with the emergency response plan and should conduct drills regularly. Monitoring and Alarm Systems: Install and maintain monitoring and alarm systems for the tank.

Carbon dioxide is widely used as a shielding gas in metal welding processes. Here are the main applications of carbon dioxide in welding: Gas Metal Arc Welding (GMAW): Carbon dioxide is commonly used as the shielding gas in GMAW welding. During 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 the welding process, enhancing the welding performance. 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 joints. Gas Shielded Cutting: Carbon dioxide can also be used in gas shielded cutting processes. In gas shielded cutting, by injecting carbon dioxide gas into the cutting area, a protective atmosphere is formed, 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.

Carbon dioxide storage tanks offer the following features and advantages: High storage density: These tanks can compress carbon dioxide gas into a liquid state, significantly increasing storage density. Compared to storing it in a gaseous state, liquid carbon dioxide can be stored in a smaller tank, saving space and costs. Various application fields: Carbon dioxide storage tanks are widely used in multiple industries, including food and beverage, industrial, fire suppression, and gas supply. Carbon dioxide serves as a preservative, beverage effervescent agent, gas, and fire extinguisher, with broad applications and market demand. Environmental friendly and renewable: Carbon dioxide is an environmentally friendly gas, and its increased concentration in the atmosphere can lead to warming and climate change. By storing and utilizing carbon dioxide, we can reduce its emissions into the atmosphere, achieving environmental protection and sustainable development. Safe and reliable: During design and manufacturing, carbon dioxide storage tanks typically use high-strength materials (such as carbon steel or stainless steel) with excellent pressure resistance and safety. The tanks are usually equipped with safety valves, pressure gauges, level indicators, and other accessories to ensure safe operation. Additionally, carbon dioxide is a non-flammable and non-explosive gas, making it relatively safe. Supply: Carbon dioxide storage tanks provide a stable supply of carbon dioxide. Through the tank's design and control systems, precise measurement and supply of carbon dioxide can be achieved, meeting the needs of various industries and applications. In summary, carbon dioxide storage tanks have high storage density, various application fields, environmental friendliness, renewable energy, safety, reliability, and supply. This makes them an important storage and supply equipment, widely used in many industries. However, safety operating procedures must still be followed when using carbon dioxide storage tanks.
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