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 has seven business centers: boilers, deep-freeze containers, pressure vessels, central air conditioning, engineering installation, international trade, and Internet of Things. It has three factory areas on Jinan Road, East Changjiang Road, and Bohai Road, covering a total of 200,000 square meters. The main workshop is 83,000 square meters, with 710 employees, including 247 engineering and technical personnel 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.
Urea synthesis from carbon dioxide is a significant chemical reaction with several applications: - Urea Production: Urea is a vital nitrogen fertilizer and chemical, widely used in both agricultural and industrial sectors. Carbon dioxide synthesis is one of the commonly used methods for producing urea. In this process, carbon dioxide reacts under high temperature and pressure conditions to form urea. This method leverages carbon dioxide resources, reducing dependence on fossil fuels used in traditional urea production. - Urea Fuel: Urea can also serve as a urea fuel for internal combustion engines and combustion equipment. By heating and decomposing urea, energy can be released, which then reacts with oxygen in the air to produce combustion heat. This combustion process only produces water vapor and nitrogen as by-products, minimizing environmental pollution. - Chemical Synthesis: Urea is a crucial raw material for many chemical synthesis processes. The carbon dioxide synthesis of urea provides a sustainable supply for the chemical industry, used to synthesize other chemicals, such as plastics, resins, paints, etc. - Energy Storage: Urea can also act as an energy storage medium. By synthesizing urea from carbon dioxide, energy can be stored in the form of chemical bonds. When energy is needed, urea can be decomposed to release it, which then reacts with oxygen in the air to produce combustion heat, releasing the stored energy. The development of carbon dioxide synthesis urea technology aims to reduce dependence on fossil fuels used in traditional urea production methods, lower greenhouse gas emissions, and promote the development of sustainable agriculture and chemical industries. However, this technology is still under development and research, requiring further technical breakthroughs and practical verification to achieve large-scale application.

Standard parameters for carbon dioxide storage tanks can vary depending on design and application requirements. Here are some common standard parameters: - Tank Capacity: The capacity of carbon dioxide storage tanks is typically expressed in kiloliters (L) or cubic meters (m). Common capacity ranges vary from a few thousand to tens of thousands of liters. - Working Pressure: The working pressure of carbon dioxide storage tanks is usually around 20 to 25 MPa (megapascals) at room temperature, with specific pressure determined by application needs and design standards. - Design Temperature: The design temperature of carbon dioxide storage tanks is usually within a low-temperature range, generally between -40°C to -60°C, to accommodate the liquefaction and storage requirements of carbon dioxide. - Material: Carbon dioxide storage tanks are commonly made from high-strength steel or alloy materials to withstand stress and loads under high pressure and low-temperature conditions. - Insulation: The interior of the tank is equipped with an insulation layer to reduce heat transfer and liquid evaporation. The insulation is typically a multi-layer structure, including thermal insulation materials and an external protective layer. - Safety Valve and Pressure Relief Device: The tank is equipped with a safety valve and pressure relief device to control internal tank pressure and prevent overpressure and explosion. - Level Monitoring and Control: The tank is fitted with level monitoring equipment to monitor the liquid level inside. Timely monitoring and control of the level ensure the liquid storage is within a safe range. - It should be noted that specific standard parameters for carbon dioxide storage tanks may vary due to different design standards, application requirements, and manufacturers. When selecting and using carbon dioxide storage tanks, it is important to consider these factors.

The automated maintenance system for carbon dioxide tanks typically includes the following main components: - Pressure Maintenance System: Monitors and adjusts the internal pressure of the tank to ensure the carbon dioxide within remains within a safe and stable pressure range. This system comprises pressure sensors, control systems, pressure regulating valves, and pressure reserve devices. - Temperature Control System: Monitors and adjusts the internal temperature of the tank to maintain the carbon dioxide within an appropriate temperature range. The system includes temperature sensors, control systems, and temperature regulating devices. - Level Monitoring System: Measures and monitors the liquid level within the tank to ensure the carbon dioxide level stays within a safe range. This system can utilize float level gauges, pressure level gauges, and ultrasonic level gauges. - Leak Detection System: Monitors leaks in the tank and pipeline systems, detecting and alerting to them promptly. The system can employ gas sensors, liquid sensors, and leak alarms. - Fire Detection and Extinguishing System: Monitors fire conditions in the tank area and takes appropriate extinguishing measures. The system includes fire detectors, alarms, and extinguishing equipment. - Remote Monitoring and Control System: Remotely monitors and controls the operational status and parameters of the tank, enabling remote operation and management. This system connects via network, providing real-time data and remote control features. These are the main components of a typical automated maintenance system for carbon dioxide tanks. The specific system configuration and functions can be customized according to the tank's design requirements and application scenarios. These automated maintenance systems enhance the tank's safety, stability, and reliability, reducing the need for manual intervention and operational risks.

Carbon dioxide is widely used in the field of food freezing. Below are some common applications of carbon dioxide in food freezing: 1. Frozen Food Processing: Carbon dioxide is often used in the processing of frozen foods. By exposing food to liquid carbon dioxide, the temperature of the food can be rapidly reduced, achieving quick freezing. This quick freezing effectively preserves the quality, texture, and nutritional content of the food. 2. Frozen Storage: Carbon dioxide is also used in the frozen storage of food. During the storage process, food is placed in a low-temperature environment, and the temperature of the food is lowered below the freezing point through the refrigerating action of carbon dioxide, thereby extending the shelf life of the food. 3. Frozen Transportation: Carbon dioxide plays a crucial role in the frozen transportation of food. By using carbon dioxide refrigeration technology during transportation, the low-temperature state of the food can be maintained, preventing quality loss. 4. Frozen Display: In the food retail industry, carbon dioxide is also used in frozen display cabinets. By injecting carbon dioxide gas into the display cabinet, 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 has some advantages, such as faster freezing speed, better freezing effect, and minimal impact on food quality. However, it is important to note that safe operation is required 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.
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