Device and method for treating fluorine-containing, ammonia-nitrogen-containing and phosphorus-containing wastewater

Abstract

The invention belongs to the technical field of wastewater treatment, and particularly relates to a device and a method for treating fluorine-containing, ammonia-nitrogen-containing and phosphorus-containing wastewater. The device for treating fluorine-containing, ammonia-nitrogen-containing and phosphorus-containing wastewater comprises a reaction tank, a reduction tank and an integrated water purifier which are connected in sequence, and a matched sludge treatment system and a dosing device; all the devices are connected in sequence through pipelines; the reaction tank is provided with threegrids, and baffling connection is adopted; and an alkali regulating agent and an oxidizing agent are adopted in the reaction tank to achieve a synergistic effect, so that the reaction speed and the reaction degree are increased, the consumption of chemicals is reduced, and the sludge yield is reduced. The device is mainly used for treating fluorine ammonia nitrogen total phosphorus wastewater with medium or low concentration, ensures efficient and stable effluent, reduces the dosage of chemicals, and shortens the reaction time.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a treatment device and a treatment method for wastewater containing fluorine, ammonia, nitrogen and phosphorus. Background technique [0002] The concentration of fluoride, ammonia nitrogen, and total phosphorus in the wastewater discharged by phosphorus chemical enterprises is relatively high, and the wastewater is more harmful. Wastewater containing phosphorus and ammonia nitrogen will cause eutrophication of water bodies. At present, the steam stripping method and membrane separation method used for the removal of ammonia nitrogen have the disadvantages of high energy consumption, low efficiency, and the need for further treatment of concentrated water after separation. For the removal of fluoride and total phosphorus, there are lime method and membrane separation method. etc., the existing problem is that the lime dosage is large, and the ammonia nitr...

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Problems solved by technology

At present, the steam stripping method and membrane separation method used for the removal of ammonia nitrogen have the disadvantages of high energy consumption, low efficiency, and the need for further treatment of concentrated water after separation. However, there are lime method and membrane separation method for the removal of fluoride and total phosphorus. etc., the existing problem is that the lime dosage is large, and the ammonia nitrogen cannot be treated, and the concentrated water separated by the membrane needs secondary treatment, so it is very important to develop a simple and efficient process for the treatment of fluorine-containing ammonia nitrogen-containing phosphorus wastewater significance

[0003] In the prior art, the invention patent application with the application number CN201910489869.X discloses a treatment method for waste water containing fluorine, ammonia, nitrogen and phosphorus, by adjusting the alkali and heating with hydrogen peroxide, then adding concentrated phosphoric acid, heating distillation, and adding silica to the mother liquor , then add ammonia water for neutralization, concentrate, and finally carry out solid-liquid separation by centrifugation to obtain ammonium dihydrogen phosphate crystals and clear liquid. This method is aimed at the treatment of high fluorine and high ammonia nitrogen, and directly treats useful fluorine and ammonia nitrogen in wastewater Recycling and utilization of resources, complex process flow, high recycling cost, not suitable for the removal of medium or low concentration of fluorine, ammonium, nitrogen and total phosphorus

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