Abstract Textile fibers are widely used for fine filtration in the disposable cartridge filter market. In this work the filtration mechanism of threaded microfiber water filters was characterized by testing the effect of filtration velocity, slurry concentration, particles size distribution (PSD) and filter pore size and porosity, on the filter performance. Constant flow rate experiments were conducted with micronized CaCO3 slurry as a model substance. It was found that the predominant filtration mechanism of the studied filters is cake filtration. Very efficient filtration followed by effective automatic cleaning of the filter was obtained as indicated by complete removal of the CaCO3 particles in all the conditions studied and similar clean filter resistance over repetitive cycles. Shorter filtration cycles were obtained at higher velocities, low porosity filter and narrow PSD. Correspondingly, the filter capacity declined as the filtration cycles were shorter. Yet, the filter capacity was found to be independent of the CaCO3 slurry concentration. A criterion of specific consumed energy per unit filtrate volume (Es) was developed. Analyses of the effect of the various studied parameters on Es revealed its dependence on the slurry concentration, velocity and filtration time.

中文翻译：

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螺纹超细纤维滤水器的过滤特性

摘要 在一次性滤芯过滤器市场，纺织纤维被广泛用于精细过滤。在这项工作中，螺纹微纤维水过滤器的过滤机制通过测试过滤速度、浆液浓度、粒度分布 (PSD) 和过滤器孔径和孔隙率对过滤器性能的影响来表征。用微粉化的 CaCO3 浆液作为模型物质进行恒流率实验。发现所研究的过滤器的主要过滤机制是滤饼过滤。如在所有研究条件下完全去除 CaCO3 颗粒以及在重复循环中类似的清洁过滤器阻力所表明的那样，获得了非常有效的过滤，然后有效地自动清洁过滤器。在更高的速度下获得更短的过滤周期，低孔隙率过滤器和窄 PSD。相应地，过滤能力随着过滤周期的缩短而下降。然而，发现过滤能力与 CaCO3 浆液浓度无关。制定了单位滤液体积比消耗能量 (Es) 的标准。对各种研究参数对 Es 影响的分析揭示了其对浆料浓度、速度和过滤时间的依赖性。