Liquid argon storage tank

The thermal insulation performance of a liquid argon storage tank mainly depends on the quality of the vacuum degree in its interlayer. Therefore, abnormal problems occurring in the tank body of a low-temperature liquid storage tank during use are often closely related to the quality of the vacuum degree.

Due to the structural characteristics of low-temperature liquid storage tanks, their main pressure-bearing component is the inner cylinder (which is not equipped with a manhole), and the outer cylinder is under negative pressure. As a result, the inner cylinder cannot be inspected during the inspection process. Therefore, the regular inspection should focus on the inspection of the outer cylinder, accessories, and the surrounding environment.

With the rapid development of the economy and industry, an increasing number of low-temperature liquid storage tanks are being used in industrial production. As a special type of pressure vessel, low-temperature liquid storage tanks are mainly used to store low-temperature liquids such as liquid oxygen, liquid nitrogen, and liquid argon. Their structure is mainly a jacketed vacuum powder insulation type, and the inner cylinder is pressurized by a supercharger to deliver the liquid to users. A low-temperature liquid storage tank is mainly composed of a tank body, a pipeline and instrument system, accessories, and a supercharger. The tank body is a jacketed vacuum container, consisting of an inner cylinder and an outer cylinder. The inner cylinder is made of austenitic stainless steel, while the outer cylinder is made of carbon steel.

The thermal insulation performance of a low-temperature storage tank mainly depends on the quality of the vacuum degree in its interlayer. Therefore, abnormal problems occurring in the tank body of a low-temperature liquid storage tank during use are often closely related to the quality of the vacuum degree.

Due to the structural characteristics of low-temperature liquid storage tanks, their main pressure-bearing component is the inner cylinder (which is not equipped with a manhole), and the outer cylinder is under negative pressure. As a result, the inner cylinder cannot be inspected during the inspection process. Therefore, the regular inspection should focus on the inspection of the outer cylinder, accessories, and the surrounding environment.

When low-temperature liquids are stored in mobile or fixed containers, although thermal insulation measures are adopted, heat will eventually leak into the low-temperature liquid container (whose temperature is much lower than the ambient temperature). The incoming heat causes the pressure and temperature of the low-temperature liquid to rise. To reduce the loss of low-temperature liquids and prevent air from seeping into the container (which would contaminate the low-temperature liquid product), sealed storage is usually adopted, which is commonly referred to as "lossless storage".

Liquid nitrogen storage tanks are generally divided into two types: storage tanks and transportation tanks. Storage tanks are mainly used for static storage of liquid nitrogen indoors; transportation tanks are specially designed with shockproof features to meet transportation requirements. In addition to static storage, they can also be used for transportation while filled with liquid nitrogen. However, severe collisions and vibrations should still be avoided.

A liquid nitrogen storage tank is a device used exclusively for holding liquid nitrogen; it is not allowed to hold other liquids. Before filling a liquid nitrogen tank with liquid nitrogen, first check whether the outer shell has dents and whether the vacuum exhaust port is intact. If the tank is damaged, the vacuum degree will decrease— in severe cases, air may leak in, making thermal insulation impossible. At this point, frost will form on the upper part of the tank, the loss of liquid nitrogen will increase, and the tank will lose its value for further use. Secondly, check whether the interior of the tank is clean and dry. If there are foreign objects, they must be removed to prevent corrosion of the inner tank.