Filtration tests were conducted on a granular bed filter with layered drawers filled with corundum particles with sizes between either 1 mm and 1.5 mm or 2 mm and 3 mm or with quartz sand particles with sizes between 0.125 mm and 1.5 mm. Filtration velocity, filter particle thickness, and filter particle size were all found to influence the filtration efficiency and the pressure drop of both the fixed granular bed and the layered-drawer granular bed. Granular strata with different thickness ratios also strongly influenced the filtration efficiency and pressure drop. For a granular bed with two sizes of filter particles, the coarse granules in the upper layer capture dust with large particle sizes, while the fine granules in the lower layer capture dust with smaller particle sizes that passes through the filter cake and upper layer. Optimal operating conditions were determined at which the filtration efficiency was found to be 99.42% with a bed pressure drop of 320 Pa.

过滤测试是在颗粒床过滤器上进行的，该过滤器装有分层的抽屉，抽屉中装有尺寸为1  mm至1.5  mm或2  mm至3  mm的刚玉颗粒，或装有尺寸为0.125  mm至1.5的石英砂颗粒 毫米 发现过滤速度，过滤器颗粒厚度和过滤器颗粒尺寸均影响固定颗粒床和分层抽屉颗粒床的过滤效率和压降。不同厚度比的粒状地层也强烈影响过滤效率和压降。对于具有两种尺寸的过滤颗粒的颗粒床，上层的粗颗粒捕获大粒径的粉尘，而下层的细颗粒捕获穿过滤饼和上层的较小粒径的粉尘。确定了最佳操作条件，在该条件下，床压降为320  Pa ，过滤效率为99.42％。