The application of fiber ball filtration system in sewage reuse is worthy of attention: the fiber ball filter layer is a steplessly variable pore filter layer, and this form of filter layer has a strong ability to intercept dirt. In order to achieve variable pore filtration for traditional granular filter materials, it is necessary to use filter materials with different specific gravity and different particle sizes for grading. The fiber ball filter material uses the principle of fluid mechanics to automatically form a steplessly variable pore filter layer with the filter material density changing from small to large along the water flow direction. Such a filter layer structure can give full play to the filter material. Ensure the quality of the filtered water.
The density of the fiber ball filter layer can be adjusted and controlled. The fiber filter material is a soft material, and the filter layer is easy to be compressed. The filtration precision can be adjusted by adjusting the density of the filter layer, but it is necessary to prevent the filter layer from being unrestrictedly compressed and the loss of filtration water head grows too fast. The two ends of the fiber ball filter element are respectively suspended on the upper filter plate and the lower filter plate of the filter tank. The density of the filter layer is not only adjustable but also controllable, which can keep the filtration flow relatively stable within a cycle (the flow decays slowly). The fiber bundle filter material was debugged some time ago and collected some information. Regarding sludge expansion, there are various analysis and solutions of sludge expansion in various processes, which I personally think is more useful. When the fiber bundle filter material is filtered, the filter layer is compressed by the gravity of the water level in the filter or the filter tank from top to bottom, and the fiber bundle filter material is in a dense state, which improves the efficiency of the filter layer to retain impurities and ensures the water quality after filtration. . When flushing, the gas and water are impacted and disturbed from bottom to top, so that the bundled filter material is in a suspended state, and the adsorption retentate in the filter layer is eluted. Thus, the optimal state of disordered filling and filtration and orderly filling and backwashing of the bundled fiber filter material is realized. When in use, the water is fed from the upper part and the water is discharged from the lower part. At this time, under the action of water flow and gravity, the fiber density adjusting device pushes the fiber filter bed to run down, the fiber filter layer is compressed, and its bulk density gradually increases along the water flow direction, so that the filter layer moves along the water flow direction. The porosity gradually decreases from large to small, and the pore diameter and pores of the corresponding filter layer gradually decrease, thus forming a particularly ideal variable-porosity deep filtration state. The filtration process includes both horizontal depth filtration and vertical depth filtration, which effectively improves the filtration precision. When the filter layer is polluted and needs to be cleaned and regenerated, the cleaning water passes through the fiber filter bed in the opposite direction. Under the action of the backwash water flow and the cleaning air, the fiber density adjusting device drives the fiber filter bed to move upward, so that the fiber filter material stretches upward to achieve In the loose state, through the air-water mixing cleaning technology, the fiber filter material is continuously shaken in the longitudinal direction during the process of bubble aggregation and hydraulic flushing, so that the fiber filter material is cleaned very thoroughly, so as to achieve the ideal cleaning effect.