Multi-stage oxidation adsorption equipment for COD removal from monovalent brine using nanofiltration

CN224450501UActive Publication Date: 2026-07-03SHANGHAI ZHANHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANGHAI ZHANHENG ENVIRONMENTAL PROTECTION TECH CO LTD
Filing Date
2025-08-08
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing technologies are unable to effectively remove high concentrations of monovalent salts and recalcitrant COD from industrial wastewater, resulting in substandard wastewater discharge. Furthermore, nanofiltration membranes have low removal rates for small molecules and hydrophilic organic matter, making it difficult to meet the needs of deep purification.

Method used

The system employs a multi-stage oxidation and adsorption device, combining nanofiltration, oxidation separation, and adsorption filtration. Through nanofiltration membrane filtration, permeate flow guidance via a filter screen, activated carbon adsorption, and oxidant decomposition, it achieves multi-layer filtration and decomposition, thereby improving wastewater purification efficiency.

Benefits of technology

It effectively improves the efficiency of wastewater removal, reduces the possibility of wastewater scaling, enhances the purification effect of wastewater, and ensures that discharge standards are met.

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Abstract

This utility model discloses a multi-stage oxidation adsorption device for COD removal from monovalent brine using nanofiltration, relating to the field of industrial wastewater treatment technology. It includes a wastewater nanofiltration unit, a sealing device, a transmission pipeline, a base, valves, connecting pipes, a wastewater detector, a wastewater oxidation separation device, and a wastewater adsorption filtration device. In this utility model, during wastewater nanofiltration, the wastewater oxidation separation device decomposes pollutants in the wastewater by adding oxidants such as ozone and hydrogen peroxide inside the inner mesh cylinder. The device is equipped with multiple sets of filter screens. As wastewater flows within the device, the filter screens slow down the flow, ensuring sufficient contact between the wastewater and the oxidants, and intercepting decomposition products. This effectively decomposes pollutants layer by layer, improving the wastewater treatment efficiency.
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