A municipal overflow sewage treatment device and method

Abstract

The invention relates to a municipal overflow wastewater treatment apparatus and method; the apparatus comprises a shell, a cyclone flocculator, a cyclone separator, a magnetic separator and a mud scraper; the lateral side of the shell is provided with a wastewater inlet, a magnetic seed inlet, a clear water outlet, a mud outlet and a gas outlet; the wastewater inlet and the magnetic seed inlet are connected to the inner upper portion of the cyclone flocculator through pipelines, the cyclone flocculator comprises a rotary shaft and a barrel having a bottom opening and sealed top, the rotary shaft is fixed in the barrel, and driving blades, guide blades, a cyclone reflecting cone and a horizontal support are arranged on the rotary shaft sequentially from top to bottom, wherein the driving blades and the guide blades are positioned in the barrel, the cyclone reflecting cone is positioned below the barrel, and the horizontal support is arranged at the bottom of the rotary shaft. The municipal overflow wastewater treatment apparatus and method can provide unpowered emergency bypass treatment of municipal overflow wastewater by using cyclone and magnetic field principals, the impurities in the municipal overflow wastewater, such as sand and suspended particulate matters, are removed effectively, turbidity is effectively reduced, partial chemical oxygen demand is effectively reduced, and pollutants such as total phosphorus are effectively decreased.

Description

Technical field [0001] The invention relates to a sewage treatment device, in particular to a municipal overflow sewage treatment device and method. Background technique [0002] In recent years, the rapid development of urbanization has caused the lack of municipal sewage collection and treatment capacity, resulting in the phenomenon of direct drainage of overflow sewage, which has led to the continuous deterioration of the water environment. Municipal overflow sewage means that when rainwater runoff flows into the urban municipal drainage pipe network under rain and snow, the flow of washed sewage exceeds the load of the drainage pipe network system. Except for part of it is transported to the sewage treatment plant, the remaining large amount of washed sewage will be Without treatment, it directly overflows into the surface water body through the pipeline, causing water body pollution. In addition, the municipal sewage drainage network cannot be transported to sewage treatmen...

AI Technical Summary

Problems solved by technology

Due to the high concentration of suspended particulate matter, high turbidity, and complex components in municipal overflow sewage, and it is mostly generated in rainy days, its discharge has the characteristics of intermittent, sudden and random, and at the same time, the sudden scene is often not have power conditions, which also increases the difficulty of handling it

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