The fiber ball is made of polyester fiber (polyester fiber) as raw material, and its main feature is that the filter material is flexible and elastic, and the gap of the filter layer is variable. Due to the effects of the filter material's own weight, water head loss and water flow direction, the entire filter layer is loose in the upper layer and dense in the lower layer during operation. The water head loss in the entire filter layer increases gradually from top to bottom along the water flow direction. In addition, the filter material has its own weight, that is, the lower filter material should bear the pressure of the weight of the upper filter material. Due to the existence of these two reasons, the pores in the lower part of the entire filter layer are formed. The distribution of the filter layer with smaller pores and larger upper pores.
In the early stage of filtration, the upper filter material first adsorbs and retains suspended particles in the water. With the passage of filtration time, the upper filter material gradually tends to be saturated, and gradually moves to the lower filter material. Due to the gradual increase in the amount of dirt intercepted by the filter layer, the water head loss It will also increase, the weight of the lower filter material will also increase, the pores of the filter material will be further reduced, and the filter layer will be further compacted. Give full play to the ability of the filter material to intercept dirt in depth, which can not only ensure the working cycle, but also ensure that the suspended matter is not penetrated, so as to ensure the water effluent effect.