Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) was established in 2001, located at No. 2218 Jinnan 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 7 business centers: boilers, deep-freezing vessels, pressure vessels, central air conditioning, engineering installation, international trade, and Internet of Things. It has 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 Ministry of Industry and Information Technology. In June 2022, it was recognized as a "Gazelle Enterprise in Shandong Province" and in August 2022, as a "Specialized and New Small Giant Enterprise" by the Ministry of Industry and Information Technology.
Carbon dioxide and liquid oxygen storage tanks are equipment used for storing different gases, and they have some physical properties that differentiate them: Physical state: Carbon dioxide (CO2) is a gas at room temperature and requires low temperatures and high pressures to be converted into a liquid. Liquid oxygen (LOX) is a liquid at room temperature and can maintain its liquid state without special conditions. Storage temperature: The liquid storage temperature of carbon dioxide is typically between -40°C and -78.5°C, while the liquid storage temperature of liquid oxygen is typically between -183°C and -183.15°C. The storage temperature of liquid oxygen is lower and requires more stringent insulation measures. Storage pressure: The liquid storage pressure of carbon dioxide is usually between 5-20 MPa, while the liquid storage pressure of liquid oxygen is usually between 0.2-2 MPa. The storage pressure of liquid oxygen is lower. Density: The density of liquid carbon dioxide is approximately 0.8 g/cm³, while the density of liquid oxygen is approximately 1.14 g/cm³. The density of liquid oxygen is greater. Safety: Liquid oxygen has a high oxygen content, making it highly flammable and oxidizing, and requires more stringent safety measures. Carbon dioxide is relatively safe but can still be harmful to humans at high concentrations.

Carbon dioxide tank level gauges are devices used for measuring and monitoring the liquid level of CO2 within the tank. Depending on different working principles and application requirements, common types of CO2 tank level gauges include the following: - Buoy Level Gauges: Use the buoyancy of a float to reflect the liquid level's height, measured through a mechanical device or an electrical signal sensor connected to the float. - Pressure Level Gauges: Utilize the relationship between liquid pressure and level to measure the level. The liquid's pressure change on the pressure sensor is measured to calculate the liquid level height. - Ultrasonic Level Gauges: Measure the level using the propagation time of ultrasound. An ultrasonic transmitter emits waves, and when the beam encounters the liquid surface, part of it is reflected back. The liquid level height is calculated by measuring the reflection time. - Capillary Level Gauges: Employ the capillary principle to measure the level. By inserting a thin tube into the liquid, the liquid rises within it, and the liquid level height is calculated based on the rise. - Level Gauges: Measure the level by reflecting waves. A transmitter emits waves, and when the beam meets the liquid surface, part of it is reflected back. The liquid level height is calculated by measuring the reflection time. The application of these level gauges in CO2 tanks can be selected based on specific needs and tank design. When selecting and installing level gauges, factors such as liquid properties, working environment, and precision requirements must be considered, and they should be ensured to match the tank's safe operation and monitoring system.

Key measures to ensure the quality of CO2 storage tanks include the following aspects: - Selecting qualified suppliers: Choose suppliers with a good reputation and experience, ensuring that the tanks they provide meet relevant quality standards and regulations. This can be achieved by assessing suppliers' qualifications, referring to customer reviews, and conducting on-site inspections to select the appropriate supplier. - Strict quality control: Implement strict quality control measures during the manufacturing process of the tanks. This includes selecting and inspecting raw materials, controlling production processes, monitoring process parameters, product testing and inspection to ensure the tanks meet quality requirements. - Compliance with standards and regulations: The design, manufacturing, and installation of the tanks should comply with relevant standards and regulations, such as industry standards and specifications. These include structural design, material selection, welding processes, corrosion prevention measures, safety valves, and configuration of pressure sensors. - Regular inspections and maintenance: Tanks should undergo regular inspections and maintenance during use to ensure safety and reliability. This involves checking the tank's appearance, sealing, valves, and pipe connections, conducting regular pressure tests and leak detection, and addressing abnormal situations promptly. - Establishing a quality management system: Set up a comprehensive quality management system, including quality control processes, documentation, quality training, and internal audits. By establishing a quality management system, tank quality control and continuous improvement can be ensured. - Third-party testing and certification: Delegate tank testing and certification to third-party agencies to verify quality and compliance. Third-party testing and certification bodies are typically independent and objective, providing unbiased assessment and certification results. - By implementing these measures, the quality of CO2 storage tanks can be effectively ensured, enhancing their safety and reliability.

Carbon dioxide storage tanks possess the following characteristics: - High-pressure Vessel: Carbon dioxide storage tanks are typically designed as high-pressure vessels, capable of withstanding high pressure. This is because carbon dioxide requires high pressure at room temperature to maintain a liquid state. - High Oxidizing: Carbon dioxide has a high oxidizing nature, supporting combustion. Therefore, when using and storing carbon dioxide, precautions must be taken to prevent contact to avoid the risk of fire and explosion. - Low-Temperature Storage: Carbon dioxide is gaseous at room temperature but can be compressed into a liquid at lower temperatures. Thus, carbon dioxide storage tanks usually need to have good insulation properties to maintain the low-temperature liquid state of stored carbon dioxide. - High Density: Liquid carbon dioxide has a high density, allowing for the storage of large amounts of carbon dioxide in a relatively small volume. This makes carbon dioxide storage tanks useful in scenarios requiring substantial carbon dioxide supply. - Safety Valves and Pressure Control: To ensure the internal pressure of the tank remains within a safe range, carbon dioxide storage tanks are usually equipped with safety valves and pressure control devices. These devices monitor and control the internal pressure of the tank to prevent excessive pressure from causing the tank to burst. - Corrosiveness: Carbon dioxide has a certain degree of corrosiveness, especially in high humidity environments. Therefore, the materials and corrosion prevention measures for the tank need to consider the corrosiveness of carbon dioxide to ensure the tank's durability and safety. These characteristics make carbon dioxide storage tanks widely applicable in many industries, such as the food and beverage industry, fire suppression, and the gas industry. When using carbon dioxide storage tanks, it is necessary to follow relevant safety operation procedures and standards to ensure operational safety.
Zhongjie Special Equipment upholds the grand vision of "realizing employees' dreams, creating customer value, and striving for the prosperity and strength of our motherland," and is dedicated to the development of the green energy equipment industry. We offer products and services with high cost-performance to contribute to society!