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What is the wind speed of high efficiency filter and the choice of wind speed

www.clean-link.cn
2021-03-18

The wind speed of the high efficiency air filter refers to the ratio of dust and air inhaled by the system when it passes through the filter cloth. In different places, different filter wind speeds should be selected. Under the same conditions, when the wind speed of the air filter is lower and the resistance of the dust collector is lower, the required filtration area is larger. The higher the wind speed of the filter, the louder the noise. The setting value should be small, and the setting resistance should be greater than the larger value. Generally speaking, where the location of the equipment is limited, a higher filtration wind speed should be selected on the ship unloader to reduce the volume of the dust collector; if space permits, a lower filtration wind speed lower than the lower filtration speed can be selected.The size of a small dust collector. 

It can reduce the total area and capacity of the filter, reduce the total area, and reduce the project investment. However, the choice of wind speed of the high efficiency air filter is higher, which will adversely affect the difficulty coefficient of dust removal, increase the friction resistance of the high efficiency air filter and the service life of the dust collection bag, resulting in operation and maintenance. In fact, choosing wind speed is another complex issue.

High efficiency filter

In order to solve this problem better and better, this is a more important problem. In recent years, it has been envisaged that the arrangement of bag dedusting equipment is reasonable in the case of higher and higher requirements for environmental maintenance. Under the premise of stable air volume, the appropriate filter wind speed can also be selected. A very important part is that the step-by-step filtration speed can reduce the filter material and increase the filter material. Processing capacity, but after increasing the filtration speed, the resistance of the equipment is set, the energy consumption is increased, the operational availability is increased, and the current filtration rate is too high. The dust layer accumulated on the filter bag is compacted to increase. Filter resistance is large, because the pressure difference between the two sides of the filter bag is too large, fine dust will infiltrate into the outside of the filter material, and even into the filter material. The filter material will increase the dust concentration at the entrance, and the high filtration speed will also make the filter material possible. The dust layer on the surface is formed flexibly, causing the dust layer to be too clean. Shrink filter bag for ash removal, energy saving and service life. 

In most cases, the lower the wind speed, the better the effect of the air filter. In the air, the dust of small particles is diffusing, and the dust of large particles is moving in inertia. When the wind speed is low, the air flow stays in the filter material for a relatively long time, and the dust has more opportunities to hit the obstacles. Therefore, the filtration efficiency is high. Experience shows that for high efficiency filters, when the wind speed is reduced by half, the penetration of dust will be reduced by nearly an order of magnitude (the filtration efficiency value will be increased by an order of magnitude); when the wind speed is doubled, the dust filtration will be reduced by an order of magnitude (the efficiency value will be reduced by an order of magnitude). 

Similar to the effect of diffusion movement, when the filter material is equipped with static electricity, the retention time of dust in the filter material will be longer, and the greater the possibility of adsorption will be. If the wind speed is changed, the filtration efficiency of the material with static electricity will change obviously. The custom is high, the resistance is also big, if the filter service life is based on the final resistance, the wind speed is high, the filter service life is short. It is difficult for ordinary users to actually observe the effect of wind speed on filtration efficiency, and it is much easier to observe the effect of wind speed on resistance. For high Western Europe filter, the speed of airflow through filter material is generally 0.01 to 0.04m stroke S. for this range, the resistance of the filter is proportional to the volume of filter airflow. For ordinary filters in air conditioners, the speed of airflow through the filter material is 0.13 to 1.0m. The relationship between resistance and air volume is no longer proportional to the air volume, but a floating value. The air volume increases by 30%, and the resistance may increase by 50%. If filter resistance is a very important parameter for you, you should ask the filter manufacturer for the resistance graph.

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