Five Physical Filtration Methods Of Compressed Air Filters
Jun 24, 2021
The effective filtration of a compressed air filter is divided into five stages. The principles are as follows. Each principle can effectively remove specific pollutants with different particle sizes and collected by each fiber in the filter medium. These particles are captured and condensed into larger ones. The droplets are transferred through the medium and then discharged.
Introduction to five filtering methods of compressed air filters
1. Gravity settlement
Generally, it only works on larger particles (at least about 2 microns in size). Generally, the particles can be effectively captured only when the flow rate is small. In this case, the number of particles is large and can be affected by gravity, so It will be caught by the fibers when flowing through the runner.
2, inertial shock
Small particles (the particle size is usually less than 2 microns) pass through the surface of the filter media, but cannot pass through the curved channel in the media, so they are captured by the fibers. In this case, inertial impact will occur.
3, direct interception
If the particle size is larger than the average pore size of the filter medium (about 0.1 microns), the particles will directly hit the surface of the fiber matrix. The compressed air filter element uses glass fiber filter media with an average fiber diameter of 0.5 microns.
4. Diffusion (Brownian motion)
It has been proved that very small particles (with a particle size of less than 0.1-0.2 microns) move in a very random and very irregular manner in the airflow. If the particles are small enough, their movement will often be very violent, thus increasing the impact on the avant-garde. The impact strength of the substrate.
5. Static electricity
If the particles and the charge on the filter can form a large enough electrostatic attraction to attract the particles to the surface of the filter, the particles can be deposited by electrostatic deposition. The electrostatic trapping mechanism has an auxiliary effect on other trapping mechanisms, especially Agency for interception and proliferation.
