Liquid nitrogen plant is an industrial system for generating liquid nitrogen for industrial applications. Liquid nitrogen is used in wide range of industries. It is used for providing inerting environment where oxidation can be harmful. The gas makes up around 78.082% of the earth’s atmosphere in terms of volume of dry air. And, it constitutes 75.3% of the atmosphere by weight of dry air. Unlike oxygen, it is not found in the crust of the earth. The inert gas is odorless, colorless and tasteless gas and is the 7th most abundantly found element in the universe. It is known as the largest industrially consumed gas. The most common application of liquid nitrogen is in preserving the freshness of the packaged food. It protects food & beverages from the damaging effects of oxidation.
Another industrial application of liquid nitrogen is as inert gas for treating melt in the manufacturing of steel. It is also used as a shield gas in the heat treatment of steel, iron, and other metals. The inert gas is used as dielectric gas for high voltage equipment. It is also used in the fire suppression systems for safeguarding information technology equipment. The gas is used in the packaging of liquid nitrogen explosives where it is used for protection. Inflating race car and aircraft tires also use nitrogen for protection against moisture and oxygen in the natural air.
It is widely used in the healthcare industry. Liquid nitrogen is used for freezing livestock semen, blood and viruses. The samples can be stored for years by using the inert gas. Another advantage of using liquid nitrogen is that its application cause minimum cell wall damage. It is also applied in MRI devices for pre-cooling the low temperature magnets before liquid helium is applied for final cooling. It is widely used for destruction of diseases cells in cryo-surgery. In the pharmaceutical industry, nitrogen is used on a large scale. It acts as a shield in the packaging of medicines for protection against degradation by oxidation.