Fluorine removal device and process for fluorine-containing wastewater
A waste water and waste water pump technology, which can be used in water pollutants, multi-stage water treatment, water/sewage treatment, etc., and can solve the problems of other ions exceeding the standard.
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Embodiment 1
[0041] A process for removing fluoride from fluorine-containing wastewater, comprising the steps of:
[0042] 1) Adjustment: Discharge the wastewater containing high concentration of fluorine together with dilute fluorine wastewater, alkaline wastewater, comprehensive washing water, etc. into the buffer tank 1 for homogeneous and even quantity adjustment, and the adjustment time is 12 hours;
[0043] 2) Primary reaction: continuously pump the fluorine-containing wastewater from the buffer tank 1 into the primary reaction tank 3, add a small amount of sulfuric acid at the same time to keep the pH of the primary reaction tank 3 at 1.5, and add the calcium sulfate salt slurry prepared by the dispensing tank 8, Ca : F=2.0:1 (mol), the primary reaction time is 20 minutes;
[0044] 3) secondary reaction: the waste water after the primary reaction enters the secondary reaction tank 4, and the secondary reaction tank 4 adds a small amount of lime slurry to adjust the pH to 7, and the ...
Embodiment 2
[0049] A process for removing fluoride from fluorine-containing wastewater, comprising the steps of:
[0050] 1) Adjustment: Discharge the wastewater containing high concentration of fluorine, the wastewater containing dilute fluorine, alkaline wastewater, and comprehensive washing water into the buffer tank 1 for homogeneous and even quantity adjustment, and the adjustment time is 24 hours;
[0051] 2) Primary reaction: continuously pump the fluorine-containing waste water from the buffer tank 1 into the primary reaction tank 3, add sulfuric acid to keep the pH of the primary reaction tank 3 at 3.0, and add the calcium sulfate salt slurry prepared by the dispensing tank 8, Ca:F =2.5:1mol, the primary reaction time is controlled at 30 minutes;
[0052]3) secondary reaction: the waste water after the primary reaction enters the secondary reaction tank 4, and the secondary reaction tank 4 adds lime slurry to adjust the pH to 8, and the secondary reaction time is controlled at 30...
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