What is the effect of wind on high efficiency filters?
Release time:
2020-12-17
Wind Pairhigh efficiency filterThere are hazards, mainly large particulate smoke and dust dominated by the principle of inertial force. For the practical application of the filter, wind is a particularly important element! In the ordinary application process, the smaller the wind, the better the practical application effect of the filter element. So what is the specific impact of wind on the high efficiency filter?
The diffusion effect (Brownian motion) of small particles of soot is significant, the wind speed is small, the cyclone stays in the high efficiency filter for a long time, and there are a lot of opportunistic collision obstacles in the soot, so the filtration efficiency is high. According to work experience, for high-efficiency filters, when the wind speed is halved, the transmittance of smoke and dust will be reduced by nearly one order of magnitude (the high-efficiency standard value is increased by 9), while the wind speed is doubled, and the transmittance will be increased by one order of magnitude (the high-efficiency is reduced by 9).
When the high-efficiency filter system is electrostatic induction, the longer the soot stays in the filter material, the greater the possibility of being inhaled by the raw material, and its actual effect is similar to external diffusion. The filtration efficiency of wind energy and electrostatic induction raw materials will also change significantly. If you know that there is electrostatic induction on the raw material, then the design of the air conditioning unit should be reduced according to the current on each filter element.
For large particles of soot based on the principle of inertial force, according to the traditional basic theory, reducing the air volume can reduce the probability of collision between soot and chemical fibers, thereby reducing the filtration efficiency of high-efficiency filters. However, due to the reduction of wind power, the resilience of chemical fibers to soot is also reduced, and soot is more likely to adhere to chemical fibers, so the actual harm is not obvious.
The wind is strong and the friction resistance is large. Assuming that the service life of the filter element is based on the frictional resistance, and the wind is large, the service life of the high-efficiency filter element is short. Ordinary users have no way to observe the harm of wind energy to filtration efficiency, but it is much easier to observe the harm of wind energy to friction resistance.
Forhigh efficiency filterThe speed of the cyclone filter material is generally 0.01~0.04 m/s. Within this range, the frictional resistance of the filter material is proportional to the discharge of the filter material. For example, a high-efficiency filter, 484 × 484 × 22b250m, has an initial frictional resistance of 250Pa at a rated wind resistance of 100 m3/h. Assuming that the specific wind resistance in the application is 1000 m3/h, its initial frictional resistance decreases to 125Pa. For the common natural ventilation filter device in the air conditioning unit, the speed of the cyclone passing through the filter material is in the range of 0.13~1 b250/s, and the frictional resistance is no longer linear with the air volume, but only rising oblique lines, with the air volume rising by 30% and the frictional resistance rising by 50%. If the frictional resistance of the high-efficiency filter is a very critical main parameter, then you need to ask the distributor of the high-efficiency filter for the frictional resistance curve.
Latest News
What is the role of chemical filters?
2023-01-11
Basic overview of chemical filters
2023-01-03
Yantair Co.,Ltd.
-Address: No.3 Baoyuan Road,Laishan District,Yantai City
-Zip Code: 264003
-Tel: 086-535-6715398
-Email: helen.sun@yantair.com
-Fax: 086-535-6715566
-Website: http://www.yantair.com
SAF Coolest v1.3.1.2 设置面板 UDUSX-ZHHP-VVSAE-ZXQ
无数据提示
Sorry, the current column is being updated, please look forward to it!
You can view other columns or returnHome Page