当前位置: Home / Faq / Large air separation FAQ /

What are the reasons why the oxygen production fails to reach the index?

What are the reasons why the oxygen production fails to reach the index?
Apr 12, 2024
Author: DEAR AST
Question Reply

There are mainly the following factors that affect the output of oxygen:
1) insufficient processing air volume. Reasons for insufficient air capacity:
① The environment temperature is too high;
② The atmospheric pressure is too low;
③ The air suction filter is blocked;
④ If the voltage is too low or the grid frequency decreases, the rotating speed will decrease;
⑤ The cooling effect of intermediate cooler is not good;
⑥ Internal leakage exists between levels;
⑦ Air leakage of valve and pipeline, leakage of automatic valve or switch valve;
⑧ For the purification process of the molecular sieve, it may be the gas leakage of the butterfly valve switching.
2) the average purity of nitrogen is too low. The reasons are:
①Distillation columnReduction of board efficiency;
② Too much air expansion caused by too much cold loss;
③ The purity of liquid nitrogen is too low, and the amount of liquid nitrogen is too large;
④The amount of liquid nitrogen is too small;
⑤ Leakage of liquid air or liquid nitrogen supercooler;
⑥ The amount of nitrogen (or fraction) taken out is too large;
⑦ The opening degree of liquid air and liquid nitrogen regulating valve is improper, and the working condition of the lower tower is not well adjusted.
3) poor heat transfer of main cooling. The heat transfer surface of the main cooling is insufficient, or there are more non-condensing gases on the nitrogen side, which will affect the heat transfer of the main cooling and reduce the evaporation of liquid oxygen.
4) equipment resistance increases. Because the tower plate, liquid-air adsorber or supercooler is blocked, the opening of liquid-air and liquid-nitrogen throttle valve is too small or blocked, which will cause the pressure of the lower tower to rise and the air entering the tower to decrease. When the switching heat exchanger freezes, it will also cause the resistance of the system to increase and the air volume in the tower to decrease automatically.
5) oxygen pipelines and containers have leaks.

DEAR Air Separation Solve YourWhat are the reasons why the oxygen production fails to reach the index?You can also learn about otherLarge 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
Why do the design, installation, and production of complete sets of air separation equipment require various parameters from the demand side?
2024.11.14
The classical single column process is the first one to be used in industrial application. However, there are many disadvantages in the classical single column process. One is that oxygen and nitrogen cannot be produced simultaneously, and the other is that the oxygen extraction rate can only reach about 70%. There are two improvement schemes to solve the defects of classical single column process. One is the curren...
2024.11.13
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