At present, with the shortage of energy, the adjustment of energy structure and the increase of environmental protection pressure, the demand for oxygen is gradually increasing. The inner tank material of the liquid oxygen tank is getting more and more attention. The selection of low-temperature materials for the inner tank of a large liquid oxygen tank is one of the key technologies in its design and manufacturing. Since the operating temperature of the liquid oxygen tank is -163°C, the inner tank material is required not only to have the necessary strength indicators, but also to ensure plasticity, toughness, and good formability and weldability, and the price is relatively low. Currently commonly used is 9Ni steel, also known as Ni9 steel, which is a low temperature steel with a nickel content (mass fraction) of 8.5% to 9.5%.
The quality of the inner tank of the liquid oxygen tank must be paid attention to. This is not only for the need to store and transport gas, but also to protect the life and property of the users. In addition, liquid oxygen tanks store some flammable and explosive dangerous gases, so the safety requirements are very high. The dangers of these dangerous storage devices have always existed, and the same is true for other related equipment. Although the application of liquid oxygen tanks has been well developed, it is inevitable that there will be many dangers. So how to reduce the risk of liquid oxygen tanks?
1. The outer shell of the liquid oxygen tank is made of stainless steel, because the stainless steel outer tank can temporarily contain the liquid of the leaking liquid oxygen tank, and its fire resistance is higher than that of ordinary carbon steel, and it has strong impact and collision resistance and good corrosion resistance. It can ensure the service life of marine tanks.
2. The joints, valves and vaporizers of the liquid oxygen tank should be arranged in a cold box with good airtightness, so that the leaking liquid oxygen tank can be enclosed, prevent the spread of combustible gas, and reduce the dangerous area.
3. Adopt an integrated design plan to design and manufacture liquid oxygen tanks, cold boxes, heat exchangers, machine bases, water curtain protection pipelines, etc., to form a “gas supply unit”, which is not only conducive to overall risk control, but also convenient Carry out product approval.
Post time: Dec-09-2021