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

What is the principle of a self-cleaning air filter in a large air separation

What is the principle of a self-cleaning air filter in a large air separation
Apr 13, 2022
Author: DEAR AST

The clean air chamber outlet of the self-cleaning air filter is connected to the air compressor inlet, where process air is drawn in from the atmosphere under negative pressure.

The air passes through the filter cartridge and the dust is blocked by the filter media. Numerous small particles of dust form a dust film on the windward surface of the filter media. The dust film improves the filtration effect, but also increases the resistance to airflow. When the resistance increases to a high limit of 600 Pa, the resistance signal is transmitted from the differential pressure transmitter to the computer in the pulse controller, which issues a command and the self-cleaning system starts to work. After receiving the instruction, the solenoid valve controls and drives the diaphragm valve according to the program. The diaphragm valve instantly releases compressed air with a pressure of 600~800kPa, which is rectified by the nozzle and blows back at the filter cartridge from inside the cartridge, blowing the dust off the outer surface of the filter media, and the resistance drops accordingly. When the resistance reaches the initial resistance of the filter media (about 150 Pa), the self-cleaning system stops working.

There are 3 ways of cleaning process: Timing and positioning, the interval time and self-cleaning time can be set arbitrarily. Differential pressure self-cleaning: when the differential pressure exceeds the target, it enters into automatic continuous self-cleaning. Manual self-cleaning: When the electric control box is not working or when there is more dust, manual self-cleaning can be used. Blowback self-cleaning process is intermittent, only 1~2 groups are in self-cleaning state each time, the rest are still working, so it has online self-cleaning function.

Dear air separation manufacturing, research the technical principle theory of each machine, to ensure the quality of small air separation units, large air separation units and liquid air separation plants.

云南红河红铅有色化工有限公司-4500

 

 

DEAR Air Separation Solve YourWhat is the principle of a self-cleaning air filter in a large air separationYou 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
The most likely leakage of switching heat exchanger is the welding line, 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. The working condition of switching heat exchanger is poor. It is not only impacted by alternating airflow, but also changes greatly in airflow temperature. In long-term operation, the weak parts are easy to leak. 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. There are three methods to check whether the switching heat exchanger leaks in operation: 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 ob...
2024.03.29
Oxygen product: liquid oxygen is pumped out from the lower tower plate of the low pressure tower and sent to the storage tank, the inner compressed oxygen pump is placed next to the liquid oxygen storage tank, the liquid oxygen extracted from the storage tank is pressurized by the oxygen pump and sent out after gasification and reheating in the main heat exchanger to get the required oxygen product in liquid air separation plant. The nitrogen product is pumped from the top of the pressure tower...
2024.03.28
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