액체질소의 특성 및 응용

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물리적 특성[ 원본 편집]

N의 이원자적 특성₂ 분자는 액화 후에도 유지됩니다. N 사이의 약한 반데르발스 상호작용₂분자는 원자간 상호작용을 거의 일으키지 않으며 끓는점이 매우 낮습니다.

액체 질소의 온도는 진공 펌프로 펌핑되는 진공 챔버에 액체 질소를 넣어 어는점 -210°C(-346°F, 63K)까지 쉽게 낮출 수 있습니다. 액체 질소의 냉각제로서의 효율성은 따뜻한 물체와 접촉하면 즉시 끓어올라 물체를 질소 기포의 절연층으로 둘러싸기 때문에 제한됩니다. 라이덴프로스트 효과로 알려진 이 효과는 액체가 끓는점보다 훨씬 더 뜨거운 표면과 접촉할 때 발생합니다. 액체 질소만 넣는 것보다 액체와 고체 질소가 섞인 슬러시 속에 물체를 넣으면 더 빨리 냉각될 수 있습니다.

Liquid nitrogen is a colorless, odorless, non-flammable, non-corrosive and extremely cold element that finds a lot of applications including research and development.Liquid Nitrogen Liquefaction :Liquid Nitrogen Plant (LNP) draws out Nitrogen gas from the atmospheric air and then liquefies it with the help of Cryo cooler.There are two methods through which Nitrogen can be liquefied:Pressure Swing Adsorption with Cryo generator.Distillation of liquid air.Working principle of Liquid Nitrogen PlantIn a Liquid Nitrogen plant, the atmospheric air is first compressed to 7 bar pressure into compressor. This high temperature compressed air is then cooled in the external refrigeration system. Then, the cooled compressed air is passed through moisture separator to trap the moisture from the air. This dry compressed air is then passed through a bed of carbon molecular sieves where Nitrogen and Oxygen are separated from the air. Separated Nitrogen is then allowed to get through Cryo cooler which cools the gaseous Nitrogen to a liquid state at the boiling point of Nitrogen (77.2 Kelvin). Finally, the Liquid Nitrogen gets collected in Dewar's vessel where it gets stored for several industrial purposes.Uses of Liquid NitrogenLiquid Nitrogen is used in many applications because of its very low temperature and low reactivity. Some of the common applications are:It is used in cryo therapy to remove skin abnormalitiesServes as a source of an extremely dry gasFreezing and transporting of food productsCooling of superconductors like vacuum pumps, and other equipmentCryo preservation of bloodCryo preservation of biological samples like eggs, sperms, and animal genetic samples.Preserving of animal's semenBranding of cattleCryosurgery (removing dead cells from the brain)Quick freezing of water or pipes to let workers work on them when valves are not available.Protects materials from oxidization.The shielding of materials from oxygen exposure.Other applications that include creating Nitrogen fog, making ice-cream, flash-freezing, flowering that shatters when tapped onto a hard surface.If you require Liquid Nitrogen plant for your application, our team can guide you the best