Method and device for environment-friendly dredging remained water metering coagulation treatment

Abstract

The invention relates to a method and a device for environment-friendly dredging remained water metering coagulation treatment, and belongs to the technical field of water treatment. The method comprises the following steps: (1) dredging remained water enters a mechanical stirring hybrid reactor while the flow rate is metered by a thin-walled weir; (2) coagulant is added into the hybrid reactor continuously; (3) the coagulant and pollutants in the dredging remained water are in contact with and react with each other while being stirred; and (4), the dredging remained water flows along a straight channel to form flocculating constituents which are removed through precipitation. The device adopts the structure that the thin-walled weir and an ultrasonic wave liquid level meter is arranged in a water inflow channel; a mechanical stirrer is mounted in the hybrid reactor; the hybrid reactor is communicated with a coagulant adding device; the lower side of the hybrid reactor is communicated with a water outflow channel; and a controller is connected with and used for controlling the ultrasonic wave liquid level meter, the mechanical agitator and the coagulant adding device. According to the invention, the structure is simple; the operation is convenient; the degree of automation is high; the operating cost is low; the device can be disassembled, mounted and transplanted to a site at any time; and the application prospect is wide.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to an environmental protection dredging residual water metering coagulation treatment method and a device thereof. Background technique [0002] At present, the discharge of wastewater is increasing year by year, and the pollution of surface and groundwater bodies is becoming more and more serious, especially the problem of "three rivers and three lakes". As the main source of drinking water in cities and towns, the serious pollution of surface water has posed a huge threat to the safety of drinking water for the public and the stability of the water ecosystem, and has seriously affected industrial production and people's lives. Therefore, the restoration of river and lake water pollution has become a top priority. [0003] With the increasingly stringent sewage discharge standards and the strict supervision of the environmental protection administrative departme...

AI Technical Summary

Problems solved by technology

[0004] The water content of the sediment produced in the environmental protection dredging process is as high as 99%, and due to the mechanical agitation of the dredging equipment, a large amount of toxic and harmful pollutants in the sediment will be transferred to the remaining water, resulting in the quality of the remaining water being inferior to that of the river to be repaired Lake water quality

If the remaining water is directly discharged into the water body to be repaired, it will inevitably cause secondary pollution and cause harm to the ecosystem of the receiving water body

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