A system and method for defluorination by induced crystallization of industrial high-concentration fluorine-containing wastewater
By using an independent inlet pipeline and fluorite crystal particles to induce crystallization, the problems of pipeline blockage and inefficient crystallization in the treatment of high-concentration fluoride wastewater were solved, achieving efficient and stable calcium fluoride precipitate formation and clear effluent.
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
In existing technologies, the pre-mixing of reagents and wastewater during the treatment of high-concentration fluoride wastewater can easily lead to scaling and blockage of pipelines. The lack of homogeneous inducing carriers results in low granulation and crystallization efficiency and the generation of sludge with high water content. Imprecise control of reaction parameters leads to disordered nucleation, resulting in low treatment efficiency and high turbidity of effluent.
By employing an independent liquid inlet pipeline design and using fluorite crystal particles as seed crystals, the fluoride-containing wastewater and CaCl2 solution are ensured to mix in the crystallization fluidized bed. The homogeneity of fluorite and reaction products is utilized to reduce the nucleation free energy, control the static bed height and molar ratio, increase the contact area and binding sites, and achieve efficient crystallization.
It avoids pipe scaling and blockage, improves crystallization efficiency, reduces sludge treatment, ensures clear effluent, and achieves efficient and stable defluorination.
Smart Images
Figure CN122403593A_ABST