2024-02-04
Filter elements with the same specifications and parameters and the same filter material have great differences in filtration efficiency and product life under different working and usage environments.
The following briefly introduces the factors affecting filtering：
The impact of dust on filtration efficiency is mainly reflected in the distribution of dust particle size.
Under the action of various filtration mechanisms, particles with smaller particle sizes are deposited between fibers under the action of Brownian diffusion. When the particle size increases from small to small, the Brownian diffusion gradually weakens, and the deposition caused by barrier retention and inertial collision increases.
Therefore, the overall filtration efficiency first decreases and then increases as the dust particle size increases.
When the particle sizes of dust particles are the same, the different characteristics of the dust itself will also have a certain impact on the filtration efficiency. The filtration efficiency increases as the adhesion and hygroscopicity of the filter material increase.
The smaller the diameter of the fibers in the filter material, that is, the finer the fiber fineness, the greater the specific surface area of the fibers. Both the interception effect and the diffusion effect can be enhanced, the surface filtration effect is enhanced, and the filtration efficiency is improved.
As the fiber filling rate of the filter material increases, the inertial collision effect and the barrier effect are enhanced, and the total filtration efficiency increases.
However, the increase rate of operating resistance at this time is much greater than the increase rate of filtration efficiency, so the method of increasing the fiber filling rate to improve filtration efficiency must be cautious.
The material of the filter material, the molding method, and the post-processing process will all have a certain impact on the filtration effect.
The flow rate of dust-laden airflow has a great influence on filtration efficiency.
From the perspective of filtration mechanism, filtration speed mainly affects inertial collision and diffusion. As the air flow velocity increases, the Brownian diffusion effect weakens, the inertial collision effect and the column interception effect become obvious, and the overall filtration efficiency shows a downward trend.
In addition, the filtration speed is also an economic indicator. Since the same air volume is processed, the higher the flow rate, the smaller the total filtration area required, the demand for filter materials and the total floor area will also be reduced, but the filtration speed will An increase will cause an increase in operating resistance, so the determination of the air flow rate needs to be determined comprehensively.
Send your inquiry directly to us
