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 seven business centers: boilers, deep-freezing containers, pressure vessels, central air conditioning, engineering installation, international trade, and Internet of Things. It operates three factory 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 engineers and technicians, 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.
Before using a CO2 storage tank, certain inspection and filling points must be addressed. Here are some common considerations: - Inspect the tank exterior: Check for any visible damage, corrosion, or leakage signs. Ensure the tank shell is intact. - Check valves and fittings: Verify that the valves and fittings on the tank are securely fastened and there are no leaks. Ensure their proper operation. - Inspect the pressure gauge: Confirm that the pressure gauge on the tank is functioning correctly and the readings are accurate. Replace or repair as needed. - Check the level indicator: Ensure the level indicator on the tank is working properly and accurately displays the level. Repair or replace if abnormal. - Inspect the pressure relief device: Check that the pressure relief device (e.g., safety valve) on the tank is functioning correctly and the set pressure meets requirements. Repair or replace if abnormal. - Inspect the filling equipment: Verify that the filling equipment (e.g., filling pipes, pumps) is operating correctly with no leaks or blockages. Ensure the safety and reliability of the filling equipment. - Filling operations: During the filling process, pay attention to the following points: - Control the filling speed to avoid too fast or too slow. - Control the filling pressure to prevent exceeding the tank's rated pressure. - Monitor the level to ensure proper filling to the appropriate level. - Regularly inspect the filling equipment and valves to ensure normal operation. - Safety measures: Adhere to relevant safety regulations and procedures during the filling process. Operators should wear appropriate protective gear, such as static-resistant clothing, gloves, etc. - Note that specific inspection and filling points may vary depending on the type of tank and application. Before using a CO2 storage tank, conduct inspections and operations according to relevant specifications and standards, and consult with experts to ensure safety and effectiveness.

Carbon dioxide has a wide range of 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 the food to liquid carbon dioxide, the temperature can be rapidly reduced, achieving quick freezing. This rapid freezing effectively preserves the quality, texture, and nutritional value of the food. 2. Freezing Storage: Carbon dioxide is also used for freezing the storage of food. During the storage process, the food is placed in a low-temperature environment, and through the freezing effect of carbon dioxide, the temperature of the food is lowered below the freezing point, 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 and loss. 4. Freezing Display: In the food retail industry, carbon dioxide is also used in freezing 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 less 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.

Carbon dioxide (CO2) and liquid oxygen (LOX) storage tanks are equipment designed for storing different gases, with some physical distinctions: - Physical State: CO2 is a gas at room temperature and requires low temperatures and high pressures to convert to a liquid. LOX is a liquid at room temperature and can remain in liquid form without special conditions. - Storage Temperature: The liquid CO2 storage temperature typically ranges from -40°C to -78.5°C, while the liquid oxygen storage temperature usually ranges from -183°C to -183.15°C. The storage temperature for LOX is lower, necessitating stricter insulation measures. - Storage Pressure: The liquid CO2 storage pressure is usually between 5-20 MPa, while the liquid oxygen storage pressure is typically between 0.2-2 MPa. The storage pressure for LOX is lower. - Density: The density of liquid CO2 is approximately 0.8 g/cm³, while the density of liquid oxygen is about 1.14 g/cm³. The density of liquid oxygen is greater. - Safety: LOX has a high oxygen content, making it highly flammable and oxidizing, necessitating stricter safety measures. CO2 is relatively safe but can still pose health risks at high concentrations.

In everyday use, CO2 storage tanks require protection and maintenance to ensure proper operation 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 action if any abnormalities are found. - **Seal Integrity Check**: Regularly inspect the tank's sealing performance, particularly at valves, pipe connections, and the tank itself. Ensure no leaks are present and address any leaks promptly. - **Temperature Control**: Maintain a suitable ambient temperature around the tank and implement insulation measures to ensure the tank's internal低温 state. - **Pressure Relief Device Inspection**: Regularly check the tank's pressure relief devices, such as safety valves, to ensure proper function. Verify that the set pressure meets requirements and perform regular maintenance and replacement. - **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 action. - **Regular Cleaning**: Clean the tank's interior regularly to remove accumulated debris and dirt. Exercise caution during cleaning to avoid flammable and corrosive substances. - **Regular Testing**: Conduct regular pressure tests and leak inspections on the tank to ensure compliance with safety requirements. The frequency and methods should adhere to 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 pressure and increased safety risks. - **Note**: Specific protection and maintenance methods may vary depending on the tank type and application.
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