Recycling treatment system for fluorine-containing coating wastewater

Abstract

The present invention relates to a fluorine-containing coating wastewater recovery treatment system, which comprises a main pipeline, the main pipeline is sequentially provided with a head section measurement device, a middle section detection device and a tail section detection device from front to back, and the main pipeline between the head section measurement device and the middle section detection device is provided with a primary dosing precipitation device, a secondary dosing precipitation device is mounted on the main pipeline between the middle-section detection device and the tail-section detection device, the dosage of the primary dosing precipitation device is adjusted according to the difference value between the initial measurement value and the middle measurement value, and the dosage of the secondary dosing precipitation device is adjusted according to the difference value between the middle measurement value and the tail-section measurement value. The method has the following beneficial effects that the dosage of the primary dosing precipitation device is adjusted according to the difference value between the initial measurement value and the middle measurement value, and the dosage of the secondary dosing precipitation device is adjusted according to the difference value between the middle measurement value and the tail end measurement value, so that dosing is accurate, and the use requirements can be better met.

Description

technical field [0001] The invention relates to a recovery and treatment system for fluorine-containing paint wastewater, which belongs to the technical field of wastewater treatment equipment. Background technique [0002] At present, the fluorine-containing wastewater treatment technology adopted is a simple one-stage physical and chemical precipitation. The fluoride ion in the wastewater is converted into calcium fluoride while adjusting the pH value of the wastewater with the help of milk of lime. , resulting in a mismatch between the dosage and the raw water, resulting in under-dosing or over-dosing. [0003] If the dosage is excessive, the dosage will be large, the generated sludge will be much, and the operating cost will be high. If the dosage is insufficient, the reaction efficiency will be low, and the removal rate of fluorine ions can only reach about 90%. Contents of the invention [0004] According to the deficiencies in the prior art above, the technical pro...

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Problems solved by technology

[0002] At present, the fluorine-containing wastewater treatment technology adopted is a simple one-stage physical and chemical precipitation. The fluoride ion in the wastewater is converted into calcium fluoride while adjusting the pH value of the wastewater with the help of milk of lime. , resulting in a mismatch between the dosage and the raw water, and the phenomenon of insufficient dosage or excessive dosage

[0003] If the dosage is excessive, the dosage will be large, resulting in a lot of sludge, and the operating cost will be high. If the dosage is insufficient, the reaction efficiency will be low, and the removal rate of fluorine ions can only reach about 90%.

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