A defluorination method for industrial high-concentration fluorine-containing wastewater induced crystallization
By controlling the molar ratio of calcium ions to fluoride ions and the rising load within a crystallizing fluidized bed, and utilizing fluid drag to form a dispersed fluidized expanded bed, calcium fluoride microcrystals grow on the surface of induced seed crystals. This solves the problems of high reagent consumption and poor stability in traditional precipitation processes, achieving efficient and stable fluoride ion removal.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUANENG QINBEI POWER GENERATION CO LTD HENAN PROVINCE
- Filing Date
- 2026-04-16
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional sedimentation processes consume large amounts of reagents, easily generate sludge with high water content, and are difficult to separate solids and liquids when treating industrial wastewater with high concentrations of fluoride. Furthermore, poor control of dosing and mixing can lead to local oversaturation and homogeneous nucleation, affecting the stability of the defluorination process and the quality of the effluent.
After adjusting the pH using a static mixer, fluoride-containing raw water and calcium chloride solution are mixed in a crystallizing fluidized bed. By controlling the molar ratio of calcium ions to fluoride ions and the rising load, a dispersed fluidized expanded bed is formed using fluid drag, allowing calcium fluoride microcrystals to grow on the surface of the induced seed crystals, thus avoiding the generation of sludge with high water content.
It achieves stable removal of fluoride ions with low reagent consumption, simplifies the solid-liquid separation process, ensures the stability of the defluorination process and the quality of the effluent, and reduces operating costs.
Smart Images
Figure CN122403531A_ABST