Sewage treatment system, sewage treatment method and adjustable power supply

By using an adjustable power supply in the sewage treatment system for intermittent switching of positive and negative polarities and decreasing current intensity, the problem of electrode scaling and high cost is solved, the life of the electrode is extended, the efficiency of sewage treatment is improved, and energy conservation and environmental protection are achieved.

CN111875005AInactive Publication Date: 2020-11-03TAICANG SHENGDA FAN MFG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TAICANG SHENGDA FAN MFG CO LTD
Filing Date
2020-08-24
Publication Date
2020-11-03
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

⚠Technical Problem

When existing advanced oxidation technology treats high-salt, high-hard waste organic wastewater containing metal ions, electrodes are prone to scaling, resulting in short electrode life, frequent pickling, low sewage treatment efficiency, and high costs.

⚗Method used

An adjustable power supply is used to extend the life of the electrode by intermittent switching of positive and negative polarities, and the delayed start of the stirring system ensures the sinking of scales. Combined with the exponential or linear decrease rule of the output current intensity, the current intensity is adjusted according to the degree of sewage pollution.

🎯Benefits of technology

It extends the life of the electrode, reduces the frequency of pickling, improves the efficiency of sewage treatment, saves electric energy, and achieves efficient and environmentally friendly sewage treatment.

✦ Generated by Eureka AI based on patent content.
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Abstract

The invention discloses a sewage treatment system which comprises a sewage treatment tank, at least one pair of electrodes and a stirring system which are arranged in the sewage treatment tank, and apower supply connected with the electrodes. The power supply can perform positive and negative polarity exchange according to preset time parameters. The cathode and anode polarities of the two electrodes are exchanged intermittently, so that on one hand, part of solid particles originally adhered to the surface of the electrode can fall off or metal reduced on the surface of the cathode can be re-dissolved into sewage, and on the other hand, the solid particles adhered to the surfaces of the diamond electrode can be partially dissolved through acid in areas near the surface of the anode. Therefore, the electrodes are regenerated by exchanging the cathode and the anode, the service lifetime of the electrodes is prolonged, and the pickling frequency is reduced, so that the sewage treatmentefficiency is improved and the cost is reduced. In the whole sewage treatment process, an output current attenuation method is adopted, and different current intensities are adopted for different pollution degrees, so that the whole system effectively saves electric energy, and the effects of energy conservation and environmental protection are achieved.
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