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Efficient treatment process for fluorine-containing wastewater

A high-efficiency and technological technology, applied in the field of high-efficiency treatment of fluorine-containing wastewater, can solve the problems of high energy consumption and unstable operation, and achieve the effects of reducing output, reducing microbial toxicity and negative effects, and enriching the mechanism of action.

Pending Publication Date: 2022-01-07
北京金元腾达科技有限公司
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  • Abstract
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Problems solved by technology

Electrodialysis defluoride can remove salt at the same time, but due to high energy consumption and unstable operation, the promotion of this method is limited

Method used

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  • Efficient treatment process for fluorine-containing wastewater
  • Efficient treatment process for fluorine-containing wastewater
  • Efficient treatment process for fluorine-containing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0041] Embodiment: process experiment

[0042] According to the original data of the water quality analysis of the water samples and the selection of process design, a two-stage dosing experiment scheme is adopted, and the type and dosage of the dosing agent are selected according to the fluoride.

[0043] Table 1, raw water quality test data table

[0044]

[0045] Scheme: The first-order reaction uses the fluorine-removing compound agent HRF-J10, and the compound agent is added to the fluorine-containing wastewater sample with a pH value of 6.0-7.0, then the flocculant is added and stirred evenly, and the water is taken out after standing and settling. The supernatant was used for the secondary experiment; in the secondary experiment, the fluorine-removing compound drug HRF-J10 was added to the supernatant of the primary reaction, and after the drug was added, the final supernatant was taken for fluoride detection.

[0046] Table 2, dosing scheme

[0047]

[0048] Co...

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Abstract

The invention belongs to the technical field of fluorine-containing wastewater treatment, particularly relates to an efficient treatment process for fluorine-containing wastewater, and provides the following scheme aiming at the problem that the control index of fluorine ions discharged from sewage is increasingly strict, and the efficient treatment process comprises the following steps: introducing sewage into a first-stage reaction system; adding a fluorine removal agent into the first-stage reaction system, and carrying out preliminary defluorination; adjusting the pH value of the water quality to 6.0-7.0 by using liquid caustic soda or lime emulsion according to the pH value of the reacted water quality after the fluorine removal agent is added; adding a PAM flocculating agent to aid coagulation after reacting and adjusting the pH value, and uniformly stirring; standing to flocculate and precipitate the sewage; guiding supernate in the first-stage reaction system into a second-stage reaction system. By using the efficient composite fluorine removal agent, the action mechanism is rich, and the adsorption capacity is high; through cooperation of coprecipitation, coordination complexing, hydroxyl adsorption and other processes, the optimal fluorine removal effect is obtained. Waste yield is low, and comprehensive cost is low; the application range is wide; the microbial safety is high; the use is convenient.

Description

technical field [0001] The invention relates to the technical field of fluorine-containing wastewater treatment, in particular to a high-efficiency treatment process for fluorine-containing wastewater. Background technique [0002] At present, the treatment methods of fluorine-containing wastewater mainly include precipitation, adsorption, ion exchange, reverse osmosis and electrodialysis. [0003] The precipitation method usually adopts the calcium salt precipitation treatment method, which mainly uses the action of fluorine and calcium ions to generate slightly soluble calcium fluoride precipitates, and then separates the precipitates from water by filtration or natural sedimentation to achieve the purpose of fluoride removal. Coal gasification wastewater contains a large amount of salts such as sodium chloride, sodium sulfate, and ammonium chloride contained in coal, which greatly increases the solubility of calcium fluoride, making it more difficult to remove F by calciu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/14
CPCC02F9/00C02F2101/14C02F2301/08C02F1/28C02F2001/007C02F1/56C02F1/583
Inventor 刘畅
Owner 北京金元腾达科技有限公司
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