The fiber sphere is a soft raw material, the filter layer is easy to shrink, and the filtration precision can be adjusted by adjusting the density of the filter layer, but in order to prevent overpressure, the loss of the filter head is too large. Both ends of the filter unit are suspended on the filter plate and the lower filter plate. The density of the filter layer is not only adjustable, but also controllable, which can make the filter flow relatively stable within a cycle.

During fiber ball filtration, the filter layer is compressed from top to bottom using the filter or the water level in the filter. The fiber ball filter material is in a dense state, which improves the efficiency of impurity interception in the filter layer and ensures the water quality after filtration. During the cleaning process, the bottom-up impact disturbance of the gas and water makes the bundled filter material suspend and loose, and is washed away by the adsorption retentate. This achieves the optimal state of disordered filtration and ordered feed backwashing of bundled fiber filter materials.

The method of use is top to bottom, bottom to top. At this time, under the action of water and gravity, the fiber density adjusting device makes the fiber filter layer run downward, the filter fibers are compressed, and the bulk density gradually increases along the water flow direction, and the porosity of the filter layer in the water flow direction gradually decreases. The pore size and pores of the filter layer gradually decrease, forming a particularly ideal variable pore depth filtration state. Horizontal depth filtering and vertical depth filtering can effectively improve filtering accuracy.

When the filter layer is contaminated and needs to be cleaned and regenerated, the cleaning water is passed through the fiber filter in the opposite direction. Under the action of backwash water flow and cleaning air, the fiber ball density adjustment device drives the fiber filter to move upward. Using air-water mixing cleaning technology, the fiber ball filter material is extended upward to a loose state. During the process of air bubble gathering and cleaning, the fiber ball is shaken longitudinally, so that the fiber ball can be cleaned, and the ideal cleaning effect can be achieved.