Construction of Shanxi LNG Gasification Station for Liquefied Gas in LNG Storage Tanks

Description :

　　{1} How to conveniently monitor liquefied gases in low-temperature storage tanks

　　The constantly increasing budget, problems, and urgent calls to gas suppliers have made the environment of the gas industry more complex than ever before. With the expansion of factories and warehouses, improving efficiency, simplifying management, and balancing budgets have become particularly prominent. In order to change the supply chain, gas suppliers need to conduct real-time analysis of low-temperature storage tanks to understand the demand for refilling and the real-time distribution of liquefied gas.

　　Disruption of operational efficiency

　　In times of economic hardship, improving operational efficiency and maintaining health checks on functionality are crucial. The unavailability of low-temperature liquids and emergency transportation of bulk gases are theoretically and literally expensive. The unavailability of low-temperature liquids can affect the revenue of gas companies. The emergency transportation of pressurized low-temperature storage tanks requires separate costs, which increases the expenses of gas companies and reduces budgets.

　　Technological progress to bridge the monitoring gap

　　The world has developed, and technology has also advanced. New technologies can monitor infrastructure and tank levels. The technology used by industrial gas cylinder suppliers and gas merchants in the past is now outdated. New technologies and tools can successfully overcome the shortcomings of manual measurement techniques to fill the monitoring gap.

　　Addressing the availability and transportation issues of liquefied gas

　　Yu Yun's monitoring system utilizes telemetry technology and sensing equipment to provide a solution for tank level monitoring. The liquefied gas monitoring instrument simplifies the tracking, processing, and real-time monitoring of liquefied gas consumption. It enables gas companies to inspect the condition of LNG storage tanks, as their availability and delivery are crucial and time sensitive.

　　Change manual mode to automatic mode

　　The manual reading protocol for recording tank data is an inefficient data collection method. Throughout the day, the available low-temperature pressurized liquefied gas in the tank needs to be monitored. To complete this task, sufficient manpower is needed, and further training and review are required. This process is both time-consuming and expensive.

　　The wireless tank monitoring system solves these problems through automatic monitoring, reducing human intervention and saving potential costs and valuable time. Not only can it accurately follow the liquid level of the storage tank, but it can also automatically update the system for document work.

　　Maintaining highly traditional leak detection techniques from every corner has disappointed gas suppliers and created an unfavorable environment for employees and customers. The low-temperature liquefied gas detection system provides a solution for monitoring instantaneous leaks of low-temperature liquefied gases. The temperature drop caused by the leakage of low-temperature fluid gas is detected by the sensing device and an alarm is issued.

　　{2} Characteristics of LNG

　　Only by understanding and mastering the characteristics of liquefied gas can the production and transportation of gas storage tanks be done well based on its features.

　　1. Basic properties of LNG

　　LNG is mainly composed of methane, which has flammable properties and compressibility, and can be easily compressed into liquid form. And methane has a relatively low density, no toxicity, and no corrosiveness. The boiling point of methane at room temperature and pressure is 162 degrees [o}. When the leakage of methane in the air reaches 5% to 15%, it will explode when mixed with oxygen. The composition of gas includes small amounts of other gases besides methane, usually alkanes such as ethane and propane, as well as nitrogen and so on.

　　2. Characteristics of LNG flammability

　　The main component of LNG, methane, is a flammable gas that remains flammable even after liquefaction into a liquid. Methane can burn at around 160 ℃, with a combustion rate of approximately 0.3m/s and a volume ratio fluctuating around 6% to 13%. Based on this, LNG and BOG will not spontaneously ignite and cause explosions when there is a normal storage space requirement for gas. But after liquefied gas comes into contact with a fire source, it will slowly burn at a low speed at the beginning, and the combustion will become more extensive over time, which leads to an increase in the contact between LNG and oxygen. Assuming that the space size during gas combustion is limited, the gas may mix with the air in the environment. Once the mixture reaches the conditions for explosion, an explosion will occur. Therefore, the space size of the place where gas needs to be used,.

　　3. Low temperature characteristics of LNG

　　Under normal environmental conditions, the boiling point of gas is around 160 ℃. Based on this characteristic, LNG can be stored in low-temperature and atmospheric pressure environments. However, it should be noted that low-temperature environmental conditions can store LNG, but the use and transportation of LNG are also limited by low-temperature conditions. In addition, various treatments of LNG also require low-temperature environments. Therefore, the functional performance of liquefied gas processing equipment and transportation pipeline materials will not be affected by high temperatures. It is necessary to avoid problems such as LNG leakage, serious accidents, and even explosions caused by improper handling of these materials due to their inability to adapt to low temperatures during work. Then, it is required that the LNG storage and transportation equipment can operate at a constant low temperature. The most commonly used storage and transportation equipment now is BOG tanks, but this type of tank may experience cold shrinkage due to the nature of the parts or tank body in a lower temperature environment. Therefore, it is necessary to inspect the BOG tanks during the LNG storage and transportation process.

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• Liquefied gas in LNG storage tanks