Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) holds an A-grade boiler manufacturing license, A2-grade pressure vessel manufacturing license, A2-grade pressure vessel design license, B-grade boiler installation, and GB2/Class, GC2/Class pressure pipeline installation licenses, as well as a qualification for electromechanical equipment installation contracting. It is a member of the China Boiler and Water Treatment Association, the China Chemical Equipment Association, and the理事 member of the Shandong Equipment Manufacturing Association. The company has also passed certifications for the ISO9001 Quality Management System, ISO14001 Environmental Management System, OHSAS18001 Occupational Health and Safety Management System, and the U.S. ASME/U2 certification.
Carbon dioxide is widely used in the field of food freezing. Below are some common applications 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, achieving quick freezing. This rapid freezing effectively preserves the quality, texture, and nutritional value of the food. * Freezing Storage: Carbon dioxide is also used for the freezing storage of food. During the freezing storage process, food is placed in a low-temperature environment, and through the refrigerating effect of carbon dioxide, the temperature of the food is lowered below the freezing point, thereby extending the shelf life of the food. * 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. * Freezing 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 offers some advantages, such as faster freezing speed, better freezing quality, and minimal impact on food quality. However, safety operation is crucial when using carbon dioxide freezing technology to avoid leaks and harm to humans. Therefore, it is necessary to follow relevant safety operation procedures and guidelines when using carbon dioxide for food freezing.

In daily operation, CO2 storage 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 prompt repair actions upon discovering any abnormalities. - Sealing Inspection: Periodically check the tank's sealing performance, particularly at valves, pipe connections, and the tank itself. Ensure there are no leaks, and fix any that are found. - Temperature Control: Maintain an appropriate 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 they are functioning correctly. 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. Promptly investigate and address any abnormal levels. - Regular Cleaning: Clean the tank internally regularly to remove accumulated impurities and dirt. Pay attention to safety during cleaning and avoid using flammable and corrosive substances. - Regular Testing: Conduct regular pressure tests and leak detections 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 storage capacity of the tank to prevent exceeding the rated capacity. Exceeding the rated capacity can lead to excessive tank pressure, increasing safety risks. Note that specific protection and maintenance methods may vary depending on the type of tank and its application.

Carbon dioxide tank level gauges are devices used for measuring and monitoring the liquid level of carbon dioxide within the tank. Depending on different working principles and application requirements, common types of carbon dioxide tank level gauges include the following: - Buoy Level Gauges: Utilize the buoyancy of a float to reflect the level's high or low position. The liquid level is measured through a mechanical device or electrical signal sensor connected to the float. - Pressure Level Gauges: Measure the liquid level by utilizing the relationship between liquid pressure and level. The level height is calculated by measuring the pressure change on the pressure sensor caused by the liquid. - Ultrasonic Level Gauges: Measure the liquid level using the propagation time of ultrasound. An ultrasonic transmitter emits waves, and when the beam encounters the liquid surface, some of the beam is reflected back. The liquid level height is calculated by measuring the reflection time. - Capillary Level Gauges: Use the capillary principle to measure the liquid level. By inserting a thin tube into the liquid, the liquid rises within the tube, and the level height is calculated based on the rise. - Level Gauges: Measure the liquid level by reflecting waves. The transmitter emits waves, and when the beam encounters the liquid surface, some of the beam is reflected back. The liquid level height is calculated by measuring the reflection time. These level gauges can be chosen for application in carbon dioxide tanks based on specific needs and tank design. When selecting and installing level gauges, consider factors such as the liquid properties, working environment, and precision requirements, and ensure they are compatible with the tank's safe operation and monitoring system.

The filling process for carbon dioxide storage tanks typically includes the following steps: Preparation: Ensure the tank and filling equipment are in good working condition. Inspect the tank's appearance and valves for any damage or leaks. Check the filling equipment's connecting pipes and valves for looseness or leaks. Prepare liquid carbon dioxide: Extract liquid carbon dioxide from the supply source and transfer it to the tank of the filling equipment. Ensure the quality and purity of the liquid carbon dioxide meet the requirements. Connect filling equipment: Attach the outlet pipe of the filling equipment to the tank's inlet valve. Ensure the connection is secure and there are no leaks. Open valves: Activate the corresponding valves on the filling equipment and the tank to allow liquid carbon dioxide to flow into the tank. Adjust the valves as needed to control the filling speed and pressure. Monitor liquid level: Use a liquid level sensor or other level measurement equipment to monitor the liquid carbon dioxide level in the tank in real-time. Ensure the level is within a safe range and avoid overfilling. Filling complete: Once the liquid level in the tank reaches the predetermined filling amount, close the corresponding valves on the filling equipment and the tank to stop the filling of liquid carbon dioxide. Inspection and cleaning: Check the valves and pipe connections during the filling process for leaks. Clean up any remaining liquid carbon dioxide around the filling equipment and tank. Documentation and reporting: Record the relevant information from the filling process, including the filling date, amount, and level monitoring results. Submit the filling report to the relevant departments or management personnel if necessary. The above is a general carbon dioxide storage tank filling process. Specific operations should be conducted according to the tank's characteristics and requirements. When performing filling operations, follow the relevant safety operating procedures and have trained professionals handle the task.
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