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This new fluorine removal device meets the regulations.
This device takes the residual fluorine in the sedimented treated waste water that contains hydrofluoric acid and changes the fluorine to apatite, and precipitates it on the surface of the crystallized material. The device has an expanded-layer reactor structure, so it is simpler, has easier maintenance management, and lower cost than existing 2-stage coagulation sedimentation devices.
Waste water passes through the crystallized material-filled expanded layer reactor by upward flow. Phosphoric acid is added to the waste water, and fluorine apatite is formed on the surface of the seed crystals.