当前位置: Home / Faq / Biogas purification FAQ /

What is distillation in air separation equipment? How is the separation of oxygen and nitrogen achieved?

What is distillation in air separation equipment? How is the separation of oxygen and nitrogen achieved?
Feb 28, 2024
Author: DEAR AST

Air separation equipment in the distillation is the use of two substances with different boiling points, many times for the process of partial condensation of mixed vapour and partial evaporation of mixed liquids, in order to achieve the purpose of separation.
Oxygen and nitrogen separation is the distillation process, oxygen and nitrogen two boiling points of different substances composed of mixed liquids, in the absorption of heat and partial evaporation, volatile components of nitrogen will be more evaporation; and mixed vapour in the release of heat and part of the condensation, difficult to volatile components of oxygen will be more condensation. If the higher temperature saturated vapour is in contact with the lower temperature saturated liquid, the vapour will give off heat to the saturated liquid. The vapour will partially condense as it gives off heat and the liquid will absorb heat and partially evaporate. When the vapour partially condenses, the concentration of the low-boiling component (nitrogen) in the vapour increases because more oxygen condenses. The concentration of the high boiling point component (oxygen) in the liquid increases during partial evaporation because more nitrogen is evaporated. If, after a partial evaporation and partial condensation, the vapour with a higher nitrogen concentration and the liquid with a higher oxygen concentration come into contact with the liquid and the vapour at different temperatures, respectively, and partial condensation and partial evaporation occur again, the concentration of nitrogen in the vapour and the concentration of oxygen in the liquid will be further increased.
This process is carried out many times, the nitrogen concentration in the vapour is getting higher and higher, the oxygen concentration in the liquid is getting higher and higher, and finally the separation of oxygen and nitrogen is achieved.

DEAR Air Separation Solve YourWhat is distillation in air separation equipment? How is the separation of oxygen and nitrogen achieved?You can also learn about otherBiogas purification FAQ about DEAR Air Separation, and solve the problem for you.
Didn’t find the problem encountered?
Please contact live chat or email for quick help.
Related FAQ
More Related FAQ
on the tower on the section of the sealing plate and pure nitrogen export cap, coarse argon tower condenser coarse argon export cap must be removed on the ground, clear clean aluminum chips with clean white cloth or plastic wrap before lifting in place. During the lifting of aluminium pressure vessels and aluminium pipelines, the installation should take protective measures to prevent damage to the surface, such as rigging jacket rubber tube, rigging between with support to open. The...
2025.09.17
At present, there are two types of common condensing evaporators in domestic air separation units, plate fin condensing evaporator and tubular condensing evaporator. Tubular condensing evaporator is divided into three types: long tube, short tube and coil. The long tube and short tube are all in row. The tube is made of red copper and the tube sheet is made of brass. It is generally used in small and medium-sized air separation plants. Coil type is generally used for auxiliary condensing evaporator. Because there is no fixed liquid level in the coil, the heat transfer coefficient is small, so it has been gradually eliminated. The plate fin condenser evaporator is made of all aluminum structure, and the plate unit is arranged in vertical star shape. Its characteristics are compact structure, light weight, small volume and easy to manufacture. It is widely used in large and medium air separation plants. Due to the gradual enlargement of the air separation unit, the heat excha
2025.09.16
Need more information?
Contact us for more details about our air separation equipment, solutions and services.
Products
  • Large air separation
  • Small air separation
  • High purity nitrogen air separation
  • Liquefaction air separation
  • Complete air separation
  • Biogas purification
  • Air separation parts
Need more information?
Tel:+86-19837850537
© Kaifeng DEAR Air Separation Industry Co., Ltd.. All rights reserved.
Online
Inquiry
Email
Top