荷尘速率对非高效过滤材料阻力特性的影响

为探究荷尘速率对非高效过滤材料阻力变化的影响，以4种不同等级非高效玻璃纤维滤料为对象，对不同过滤风速和荷尘质量浓度下滤料阻力变化规律展开实验研究，并总结出滤料荷尘过程阻力变化经验公式.结果表明:在相同过滤风速和荷尘质量浓度下，等级越低的滤料归一化阻力增长速率越快，且进入表面过滤所需荷尘量越大.在相同过滤风速下，滤料荷尘质量浓度越高，阻力随单位面积荷尘量的增长越慢；而滤料等级越高，荷尘质量浓度变化对阻力的影响越小.相同荷尘速率时，过滤风速对滤料归一化阻力增长的影响可忽略.

Effect of Dust Loading Rate on Pressure Drop Characteristics of Non-high Efficiency Filter Media

In order to study the effect of dust loading rate on the pressure drop of non-high efficiency filter media， four different grades of non-high efficiency glass fiber filter media were selected to carry out experimental tests on the change characteristics of filter media pressure drop under different face velocities and dust loading mass concentrations， and the empirical formula of pressure drop change in dust loading process of filter media was summarized. The results show that under the same face velocity and dust loading mass concentration， the lower the grade of filter media， the faster the growth rate of normalized pressure drop， and the greater the amount of dust required to enter the surface filtration period of the filter media. When the face velocity is the same， the higher the dust loading mass concentration of filter media， the slower the pressure drop increases with the dust load per unit area. And the higher the grade of filter media， the smaller the influence of dust loading mass concentration on its pressure drop. The effect of face velocity on the growth of the normalized pressure drop can be ignored under same dust loading rate.