当前位置: Home / Faq / Air separation parts FAQ /

In which parts of switching heat exchanger are easy to leak, what is the cause, how to check and how to deal with it?

In which parts of switching heat exchanger are easy to leak, what is the cause, how to check and how to deal with it?
Mar 29, 2024
Author: DEAR AST
Question Reply

Switching heat exchanger of air separation plantThe most likely place to leak is the weld seam, especially the joint of the head and the pipeline. Most of the causes of leakage are the quality problems of manufacture and installation, which are also related to maintenance.Switching heat exchangerThe working condition is poor, not only affected by alternating airflow, but also the airflow temperature changes a lot, in the long-term operation, the weak parts are easy to cause leakage.
Therefore, the welding quality should be strictly guaranteed during manufacture and installation. After installation, strict leak detection and pressure test must be carried out before driving, and problems should be dealt with timely to avoid passivity after driving.
Check in operationSwitching heat exchangerThere are three ways of leakage or not:
1) flow method. When a large amount of leakage occurs between the channel of product oxygen or product nitrogen and air channel, the output of oxygen or nitrogen increases obviously. The air intake should also increase. At the same time, the air pressure decreases and the upper tower pressure increases.
2) purity method. When there is a small amount of leakage between the oxygen and nitrogen channels of the products and the air channels, it can be judged by the results of the product purity analysisSwitching heat exchangerThe purity of the product declines.
3) temperature method. When leakage occurs between the air channel and the sewage and nitrogen channel, the temperature in the middle part will change obviously, and it can be judged from the temperature change which unit has the leakage. Moreover, the air intake will also increase.
Repair welding should be conducted after identifying the leakage parts. If there is an internal leakage in a single channel, the channel can be sealed. If the serious leakage cannot be solved, replace thisHeat exchangerUnit.

DEAR Air Separation Solve YourIn which parts of switching heat exchanger are easy to leak, what is the cause, how to check and how to deal with it?You can also learn about otherAir separation parts 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 liquefaction of gases can be divided into forward and reverse cycles. The forward cycle process is the absorption of heat from the higher temperature external heat source and the release of heat to the lower temperature external heat source. The reverse cycle is when the mass draws heat from a lower temperature external heat source and releases it to a higher temperature external heat source. The forward cycle converts heat energy into mechanical energy and the reverse cycle converts mechani...
2025.09.26
Distillation is using the different boiling points of the two substances to condense the mixed steam and vaporize the mixed liquid repeatedly to achieve gas separation. For a mixed liquid composed of two substances with different boiling points, when the heat absorption part evaporates, the volatile components will evaporate more, while the mixed steam will give off heat and partially condense, the non volatile components will condense more. If the saturated steam with higher temperature is mixed with the saturated liquid with lower temperature, the steam will release heat and partially condense, and the liquid will absorb heat part of it evaporates. If after a round of partial evaporation and partial condensation, the steam and liquid with higher concentration will contact with the steam and liquid with different temperature respectively, and then partial condensation and partial evaporation will occur again. This process will be repeated for many times, and finally gas separation
2025.09.25
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