liquid oxygen plant and liquid nitrogen plant: Condensation, Decompression, Evaporation, and Pressurization
Air separation units (ASUs) are key industrial technologies used to separate air into its primary components: oxygen (O₂), nitrogen (N₂), and other gases. This process is crucial in a variety of applications, from medical oxygen production to the manufacturing of gases used in industrial processes. The separation of air into these components involves intricate processes of condensation, decompression, evaporation, and pressurization, all of which are facilitated by the use of liquid oxygen (LOX) and liquid nitrogen (LIN).
Summary of Air Separation Process
Compression
The air is compressed in stages to increase the difference between the molecular properties of oxygen and nitrogen.
Cooling and Condensation
The compressed air is cooled using liquid nitrogen and liquid oxygen, causing the oxygen and nitrogen to condense into liquids. This is the point where the separation process begins.
Decompression
The pressure is reduced to allow for the separation of gases as they evaporate at different temperatures. Oxygen evaporates at a higher temperature than nitrogen, leading to their separation.
Evaporation and Pressurization
The evaporated gases (oxygen and nitrogen) are pressurized and can be further purified, stored, and used in various applications.
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