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

Switching purification process what problems should be paid attention to when the air separation plant restarts after a short-term stop?

Switching purification process what problems should be paid attention to when the air separation plant restarts after a short-term stop?
Mar 08, 2024
Author: DEAR AST
Question Reply

Switching purification processAir separation equipmentIt refers to self-cleaning of moisture and carbon dioxide in the passageway of switching Plate-fin Heat Exchanger (or cooler) through switching valve. Switching purification process the air separation equipment mostly adopts the method of circulation or extraction to reduce the temperature difference of the cold end of the Plate-fin Heat Exchanger (or the cooler); it adopts the expansion heat exchanger to recover the cooling, further reduce the temperature of the expansion gas; use the liquid supercooler to further reduce the liquid temperature of the throttle entering the upper tower. Therefore, switching purification processAir separation equipmentWhen restarting after short-term parking, attention should be paid:
1) before recovery, determine the start-up circuit according to the temperature recovery situation at the cold end;
2) there is a liquid supercoolerAir separation equipment, Drain a part of the liquid from the lower tower and the main cooling before starting to prevent the liquid air supercooler from blocking;
3) when the temperature at the cold end reaches-150℃, the circular flow should be reduced as much as possible to prevent carbon dioxide from blocking the circulation channel;
4) shorten the switching time and reduce the cold end temperature as soon as possible;
5) when the temperature at the cold end reaches the technological requirements and the air separation starts into the fourth stage, the expansion heat exchanger should not be started first to prevent carbon dioxide from blocking the expansion heat exchanger.

DEAR Air Separation Solve YourSwitching purification process what problems should be paid attention to when the air separation plant restarts after a short-term stop?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
Small air separation unit is the unit that separates air into oxygen and other gases by first compressing and cooling the air into a liquid state and then using the characteristic that oxygen has a different boiling point to other gases in the air to obtain oxygen and liquid oxygen by evaporation and separation, as well as other rare gases as required.Liquid oxygen is produced using the cryogenic separation of air. The basic principle is to u...
2025.04.02
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