Purification of LNG cryogenic storage tank

The cryogenic storage tank is a vertical or horizontal double-layer vacuum insulated storage tank for storing liquid oxygen, nitrogen, argon, carbon dioxide and other media. The LNG cryogenic storage tank has a flat-bottom double-walled cylindrical shape. The tank body is composed of two layers, inside and outside, with a heat insulation structure between the two layers, which is a cold insulation layer. The inner tank is used to store liquefied natural gas, while the outer shell is used for protection and cold preservation. In order to reduce the introduction of external heat into the tank, the internal and external tanks are designed to be separated and independent.
 
The working pressure of the LNG cryogenic storage tank is 0.6-1.44MPa, and the working temperature is -162 ℃. The tank body is composed of two layers, inside and outside. The insulation structure of the material is isolated from the atmosphere to avoid the influence of atmospheric pressure or temperature changes and the entry of materials. Humid air enters the insulation layer between the inner and outer bladders, which effectively guarantees and improves the use of insulation materials. Before the LNG cryogenic tank is filled with LNG once, or after it is stopped due to internal maintenance, the storage tank should be purified. The purpose of purification is to replace the air or natural gas in the storage tank with inert gas to avoid the formation of Explosive mixed gas of natural gas and air, this purification treatment is also called "inerting", the gas used for inerting is usually nitrogen or carbon dioxide.
 
To sum up, the contents mentioned are related matters shared by cryogenic storage tank manufacturers for everyone. For more information on cryogenic storage tanks, please lock our website for more details!