当前位置: Home / Faq / High purity nitrogen air separation FAQ /

Effective energy analysis of cold energy utilisation in liquid air separation plants

Effective energy analysis of cold energy utilisation in liquid air separation plants
Jul 18, 2024
Author: DEAR AST

Effective energy analysis is an important analytical method for energy systems. Liquid air separation plant is a low-temperature liquid mixture with methane as the main component, including nitrogen, ethane, propane and other components, which has a large temperature difference and pressure with the outside world. Liquid air separation plants's temperature accompanied by phase change heat, so its cold energy is divided into sensible heat and latent heat. The effective energy analysis shows that when the pressure is certain, the ambient temperature difference increases and the effective energy of the liquid air separation plant cold increases, when the temperature is certain, as the pressure of the liquid air separation plant increases, the effective energy of the pressure increases, but the effective energy of the low temperature decreases. One of the reasons for this is that as the pressure increases, the bubble point of the liquid mixture rises and the temperature difference between it and the environment decreases, and as the pressure increases, the latent heat of vaporisation of the liquid mixture nears the critical zone decreases.

Dear Air Separation relies on a technical team formed by universities and research institutes to design reasonable and efficient liquid air separation plants, small air separation units and large air separation units.

旋转-DSC03535

DEAR Air Separation Solve YourEffective energy analysis of cold energy utilisation in liquid air separation plantsYou can also learn about otherHigh purity nitrogen air separation 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
The air cooling tower is the core equipment of the air separation precooling system, which is mainly used to cool and wash the high-temperature compressed air discharged from the air compressor, provide qualified low-temperature gas source for subsequent molecular sieve purification and cold box rectification, and ensure the stable operation of the whole unit. The air cooling tower adopts the countercurrent packing heat exchange structure, the tower is filled with high-efficiency packing, and the top is equipped with a spray device and a wire mesh demister. During operation, the high-temperature compressed air at 80 to 100 ℃ discharged by the air compressor enters from the bottom of the tower and flows from bottom to top; The cooling water is the normal temperature make-up water and the low-temperature chilled water prepared by the water-cooling tower, which is sprayed from top to bottom from the tower top, and the air and water are fully contacted in reverse for heat exchange. Under t
2026.11.12
Regulation of liquid nitrogen throttle valveThe opening of the liquid nitrogen throttle valve not only affects the reflux ratio of the upper tower, but also affects the reflux ratio of the lower tower. When the opening is increased, the reflux ratio of the upper tower increases, while the reflux ratio of the lower tower decreases, the purity of the nitrogen in the upper tower increases, and the purity of the oxygen enriched night sky in the lower tower increases. However, after the opening is over, the purity of the liquid nitrogen decreases, and the reduction of the reflux ratio of the upper tower is also detrimental to the improvement of the purity of the liquid oxygen. Therefore, an equilibrium point should be found for the opening of the liquid nitrogen throttle valve. We can generally use the purity difference between liquid nitrogen and gas nitrogen to judge whether the opening is appropriate. Generally, the purity of the sprayed liquid nitrogen is equal to that of the upper towe
2026.11.11
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