![]() Liquid oxygen is stored in a liquid storage tank. The liquid air gets separated into oxygen, nitrogen and inert gases in the air separation column. Next, it is liquefied by cryogenic cooling using the latest plate and fin, high efficiency heat exchangers and expanders. LOX Plant uses atmospheric air which is, then, is entered into the molecular sieve purification system to remove the moisture and CO2 from the process air. A hose pipe is used for taking out liquid oxygen from the tank. Liquid Oxygen is Stored in a Liquid Storage Tank : Liquid oxygen is filled in a liquid storage tank that is connected to the liquefier forming an automatic system. Air gets liquefied when it reaches at the air separation column and is separated into oxygen and nitrogen by the process of rectification. It is expected that we achieve a difference delta as low as 2 degree Celsius at the warm end of exchangers. It is cooled inside the heat exchanger below sub zero temperatures by air expansion process in the expander. Separation of Liquid Air into Oxygen and Nitrogen by Air Separation Column : The air that enters the low pressure plate fin type heat exchanger is moisture free, oil free and carbon dioxide free. The cryogenic refrigeration and cooling is provided by a highly efficient turbo expander, which cools the air to temperature below -165 to-170 deg C. The Molecular Sieve separates the carbon dioxide & moisture from the process air before the air reaches at air separation Unit.Ĭryogenic Cooling of Air By Expander : The air must be cooled to sub zero temperatures for liquefaction. Purification of Air By Purifier : The air enters a purifier, which is made up of twin molecular Sieve driers that function alternatively. ![]() Pre Cooling System : The second stage of the process involves use of a refrigerant for pre-cooling the processed air to temperature around 12 deg C before it enters the purifier. It is done by using the latest compressors (Screw/Centrifugal Type).
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