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The Fiber ball is mainly used to treat some oily dirt which is difficult to treat and other waste water, so it is more difficult to clean the fiber ball. This kind of backwashing technology mainly includes air, air-water, and water three-stage to ensure that the fiber ball filter layer is clean and free of impurities. When the filter is full and the filter layer is at a certain depth, air flushing is required.
After scouring for a period of time, the air will not stop, and the air flushing intensity does not need to be changed. Add water to flush, the flushing intensity is very small, as long as the released sludge can rise to the drainage tank in a suitable time. Air-water combined recoil is the key to the cleanliness of the filter layer. Respectively, the mud is removed during the air flushing process, so that at this stage, the air flushing maintains the fluid state of the filter layer, and the water flushing is effectively dragged to the upper layer.
Fiber ball filtration can be applied to the backwashing method: In order to ensure that the filter layer has sufficient cleanliness after backwashing, and can be close to a uniform state, the current ideal method is to use air, air, water, and water three-stage air-water backwashing technology . When the filter tank is filled with water and kept at a certain water depth, a separate air flush is first performed. On the one hand, the particles of the modified fiber ball filter material rub against each other to make the sludge adhered to the modified fiber ball filter material fall off. Stir the filter layer for the purpose of homogenization.
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