液体窒素の特徴と応用

基本情報

製品説明

物理的性質[編集]

N の 2 原子の性質₂液状化後も分子は保持されます。 N間の弱いファンデルワールス相互作用₂分子間の原子間相互作用はほとんどなく、沸点が非常に低いことがわかります。

液体窒素の温度は、真空ポンプで排気された真空チャンバー内に置くことで、凝固点 -210 °C (-346 °F; 63 K) まで容易に下げることができます。 液体窒素の冷却剤としての効率は、より温かい物体と接触するとすぐに沸騰し、窒素ガスの泡の断熱層で物体を包み込むという事実によって制限されます。 ライデンフロスト効果として知られるこの効果は、液体がその沸点よりもかなり熱い表面と接触したときに発生します。 液体窒素だけではなく、液体窒素と固体窒素のスラッシュに物体を突っ込むと、より速く冷却できる場合があります。

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