Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) holds an A-grade boiler manufacturing license, an A2-grade pressure vessel manufacturing license, an A2-grade pressure vessel design license, a B-grade boiler installation license, and GB2/Class, GC2/Class pressure pipeline installation licenses, as well as a mechanical and electrical equipment installation contracting qualification. It is a member of the China Boiler and Water Treatment Association, the China Chemical Equipment Association, and the council member of the Shandong Equipment Manufacturing Association. The company has also passed the ISO9001 Quality Management System, ISO14001 Environmental Management System, OHSAS18001 Occupational Health and Safety Management System certifications, and the American ASME/U2 certification.
The safe operation of low-temperature carbon dioxide storage tanks is primarily crucial in the following aspects: Design and Manufacturing: The tank's design and construction must comply with relevant standards and regulations to ensure they can withstand working conditions under low temperatures and high pressures. The tank should possess adequate strength and sealing performance to prevent leaks and ruptures. Safety Valves and Pressure Control: The tank should be equipped with safety valves and pressure control devices to ensure internal pressure remains within safe limits. Safety valves should be regularly inspected and tested to ensure proper functioning. Temperature Control: Effective temperature control is necessary for low-temperature carbon dioxide storage tanks to prevent freezing or embrittlement due to excessively low temperatures. Appropriate insulation materials and equipment should be used to maintain the tank and pipeline temperatures within safe ranges. Leak Detection and Alarm: The tank should be fitted with leak detection equipment and an alarm system, along with corresponding monitoring devices. These devices can promptly detect leaks and trigger alarms for appropriate action. Safe Operation and Training: Operators should receive relevant training to understand the safe operation procedures and standards for low-temperature carbon dioxide storage tanks. Operators should be familiar with the tank's characteristics, working principles, and emergency response measures. Regular Inspection and Maintenance: Tanks should be regularly inspected and maintained, including visual inspections, anti-corrosion coating maintenance, and leak detection. Regular inspections can help identify potential issues early and take corrective measures. Emergency Preparedness: Establish an emergency response plan and equip with appropriate firefighting and first aid equipment. Operators should be familiar with emergency procedures and be able to respond swiftly to emergencies. Please note that the above key points are general recommendations. Specific safe operation should be based on the design and usage requirements of the low-temperature carbon dioxide storage tank. Before using the tank, it is recommended to refer to relevant safety operation manuals and guidelines to ensure operational safety.

In daily operation, carbon dioxide tanks require protection and maintenance to ensure proper functioning and safety. Here are some common protection and maintenance methods: - Visual Inspection: Regularly check the tank's exterior for corrosion, wear, and cracks. Take immediate corrective actions if any abnormalities are found. - Sealing Inspection: Regularly check the tank's sealing performance, especially at valve and pipe connections, and the tank's own seal. Ensure no leaks and repair any found. - Temperature Control: Maintain a suitable surrounding environment temperature for the tank and take appropriate insulation measures to ensure the tank's low-temperature condition. - Pressure Relief Device Check: Regularly inspect the tank's pressure relief devices, such as safety valves, to ensure proper operation. Verify that the set pressure of the relief devices meets requirements and perform regular maintenance and replacements. - Level Monitoring: Regularly monitor the tank's liquid level to ensure accurate measurements. If an abnormal level is detected, promptly investigate the cause and take appropriate actions. - Regular Cleaning: Regularly clean the tank's interior to remove accumulated impurities and dirt. Pay attention to safety during cleaning and avoid using flammable and corrosive substances. - Regular Testing: Regularly conduct pressure tests and leak inspections on the tank to ensure safety performance meets requirements. The frequency and methods of testing should comply with relevant regulations and standards. - Storage Capacity Control: Control the tank's storage capacity to avoid exceeding the rated capacity. Exceeding the rated capacity can lead to excessive tank pressure and increase safety risks. - Note that specific protection and maintenance methods may vary depending on the type of tank and its application.

Carbon dioxide tanks can be categorized into various types and structures based on their design and usage: - Vertical Tanks: Commonly used carbon dioxide tanks, shaped as cylinders, placed vertically. These typically have larger capacities and are used for large-scale storage and supply. - Horizontal Tanks: Another common type, shaped as rectangles or cylinders, placed horizontally. Suitable for smaller-scale storage and supply in limited spaces. - Spherical Tanks: Special carbon dioxide tanks with a spherical shape, offering high strength and pressure containment. Ideal for high-pressure storage and transportation. - Vertical Tanks (Small Capacity): Smaller capacity tanks with a cylindrical shape, placed vertically. Used for small-scale storage and supply, such as commercial and residential applications. - Underground Tanks: A unique structure where the carbon dioxide tank is buried underground. They save space, reduce visual impact, and offer safety and environmental protection. These tanks are usually constructed from pressure-resistant materials (like carbon steel or stainless steel) with certain insulation properties and accessories such as safety valves, pressure gauges, and level indicators. The interior often features baffles or partitions to separate different liquids or gases. Additionally, safety systems like pressure maintenance systems, leak detection systems, and fire detection systems are equipped.

Carbon dioxide has wide applications in the field of food freezing. Below are some common uses of carbon dioxide in food freezing:  Freezing Food Processing: Carbon dioxide is often used in the processing of frozen foods. By exposing food to liquid carbon dioxide, temperatures can be rapidly reduced for quick freezing, effectively preserving the quality, texture, and nutritional content of the food.  Freezing Storage: Carbon dioxide is also utilized in the freezing storage of food. During the storage process, food is placed in a low-temperature environment, where the cooling effect of carbon dioxide lowers the temperature below the freezing point, extending the shelf life of the food.  Freezing Transportation: Carbon dioxide plays a crucial role in the freezing transportation of food. By employing carbon dioxide freezing technology during transportation, the low-temperature state of the food is maintained, preventing quality loss.  Freezing Display: In the food retail industry, carbon dioxide is used in freezing display cabinets. Injecting carbon dioxide gas into the display maintains the low temperature, showcasing the food while preserving its freshness and quality.  Compared to traditional freezing techniques, carbon dioxide freezing offers advantages such as faster freezing, better freezing effects, and minimal impact on food quality. However, safety operations must be observed 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.
Our company attaches great importance to technological innovation and research and development design. We possess one city-level enterprise technical center in Heze City, equipped with non-destructive testing, physical and chemical testing, welding testing, hydrostatic testing, and other testing facilities. We have over 600 types of equipment, including CNC machine tools, X-ray flaw detectors, digital ultrasonic flaw detectors, mechanical property testing machines, chemical analyzers, spectrometers, tensile testing machines, plasma welding machines, and more. Our developed key products such as temperature-pressure vessel welding, biomass boiler emissions reduction, and waste heat recovery have successively been included in multiple Shandong Provincial Department of Industry and Information Technology science and technology innovation projects, key provincial projects, and Heze City innovative excellence projects. We have cumulatively obtained 27 authorized utility model patents, 16 authorized invention patents, participated in drafting 2 standards, 2 industry standards, and registered 15 trademarks. The technical team of our company, in collaboration with Professor Li Yajiang of Shandong University, has developed deep cryogenic container processing technology, utilizing the international plasma arc + wire-inert gas tungsten arc welding (PAW-GTAW) technology. The provincial-level scientific and technological achievement evaluation has determined that the technology level has reached an international standard in the field of deep cryogenic container manufacturing. Choose ZJ Special Equipment, let's join hands to create brilliance!