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
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