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Experimental investigation of deposition and removal of particles during gas filtration with various fabric filters

机译:使用各种织物过滤器进行气体过滤期间沉积和去除颗粒的实验研究

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The aim of this study was to investigate the deposition of particles in three types of synthetic fabric filter by scanning electron microscope (SEM) and to determine the experimental adhesive force of filter cakes in fabric filters. The fabrics used were acrylic, polypropylene and polyester. The particulate matter was phosphate rock. The particles were deposited in the filters during 10 filtration cycles, with a superficial filtration velocity of 0.10 m/s and maximum pressure drop of 980 Pa across the filter. The cleaning technique used was reverse air flow at 0.12 m/s. The results showed that the deposition depth of particles in the polypropylene filter was lower than those observed in the polyester and acrylic filters. Nevertheless, the residual pressure drop of the polypropylene at the beginning of the filtration assays was highest, owing to the greater accumulation of particles at the surface of the filter and the characteristics of the filter itself. It was also observed that the adhesion force was higher in the polypropylene filter than in the other filters, making it hard to remove the filter cake from that filter.
机译:这项研究的目的是通过扫描电子显微镜(SEM)研究三种类型的合成纤维过滤器中颗粒的沉积,并确定织物过滤器中滤饼的实验粘附力。所使用的织物是丙烯酸,聚丙烯和聚酯。颗粒物是磷酸盐岩。在10个过滤循环中,颗粒以0.10 m / s的表观过滤速度和980 Pa的最大压降通过过滤器沉积在过滤器中。所使用的清洁技术是以0.12 m / s的反向气流。结果表明,聚丙烯过滤器中颗粒的沉积深度低于聚酯和丙烯酸过滤器中的颗粒沉积深度。然而,由于在过滤器表面上颗粒的更大堆积和过滤器本身的特性,在过滤试验开始时聚丙烯的残余压降最高。还观察到,聚丙烯过滤器中的粘附力高于其他过滤器,从而难以从该过滤器上除去滤饼。

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