Experimental Determination of the Permeability of Non-Porous Planar Structures during Operation of Equipment in Own Industrial Unit

Abstract

The permeability is a physical property related to porous structures. It is a physical quantity that quantifies the resistance that a permeable matrix has to the flow of a particular fluid. Knowledge of the permeability of a filter media is important for the design, optimization and operation of various equipment, such as fabric filters, sedimentary, filtering hydrocyclones and others. There is the routine that the experimental determination of permeability of a filter medium is not made during the operation of industrial equipment, because they require a specific instrumentation or because it not presents a flat filtration. Therefore the experimental determination of permeability occurs out the industrial, in testing of laboratory by flat filtration. The two different times (industrial and laboratory) increase operation costs for the user by requiring uninstalling or fragmentation of the equipment to take it the laboratory. This work aimed to present a methodology (experiments combined with CFD techniques) in which it is possible to determine the permeability of a filter media (non-flat geometry) in their own manufacturing plant. According to the main results achieved, the proposed methodology was satisfactory, eliminating the need for characterization of filter media in the laboratory.

Effect of a Cylindrical Permeable Wall on the Performance of Hydrocyclones

“…Hence, the effect of insertion of a filtering wall can be also different in these two parts (cylindrical and conical) of this device. Thus, considering this fact in our previous works [6,[19][20][21][25][26][27][28], it was verified that benefits achieved in the new hydrocyclone (conical filtering wall) are unquestionable, and that there are still new possibilities to enhance its performance.…”

“…The massive walls of hydrocyclones were made of brass and the filtering cylinders were manufactured with sintered bronze particles. Filtration tests were performed according to the method of Rocha and Vieira [28] for determining the permeability and porosity of the cylindrical filtering walls. The evaluated porosities and permeabilities are presented in Tab.…”

Study on Filtering Hydrocyclones Operating with Concentrated Non-Newtonian Suspensions

“…Although a different material was used in order to produce the frustums of the devices under study, it is important to inform that both alloys show good mechanical resistance, thus being able to bear the abrasion caused by the swirling movement of the suspension; they also do not show any chemical interaction with the fluid used in this study. The permeability and porosity of the filtering cone section were determined following the methodology proposed by Rocha and Vieira and Darby, in which were obtained the following values: 1.61 × 10 –16 ± 0.007 × 10 –16 m 2 and 3.52 ± 0.005%, respectively. The flow through the porous contour is small when comparing it with the inlet and the other outflow streams.…”