Polluted bottom sediment environment-friendly dredging system and dredging method thereof

Abstract

Disclosed are a polluted bottom sediment environment-friendly dredging system and a dredging method of the system. The system comprises a ship and a sediment suction square box, a comprehensive control room, a ship position GPS position indicator, a positioning pile and a winch are arranged on the ship, and the winch is connected with the sediment suction square box through a cable rope. The sediment suction square box is connected with a sediment suction pump through a sediment suction pipeline. A bottom sediment GPS position indicator and a fathometer are arranged on one side of the sediment suction square box, an underwater illumination lamp and an underwater camera are arranged on the other side of the suction square box, a fluidizing device is arranged in the sediment suction square box, a sealing device is arranged at the bottom of the suction square box, and an exhaust pipe is arranged at the top of the sediment suction square box. A controller is arranged in the comprehensive control room on the ship. The dredging method of the system comprises the steps that the ship is in place, sediment suction is prepared, environment-friendly sediment suction is carried out, leaving is prepared, and the ship leaves. High-precision positioning of a dredged position and precise control over the dredging process are achieved, secondary pollution caused by sediment diffusion in the sediment taking process is avoided, dredging cost is effectively lowered, and dredging efficiency is effectively improved.

Description

technical field [0001] The invention relates to a dredging system and a dredging method for polluted bottom mud of natural water bodies such as rivers, lakes, river estuaries and tidal flats, and belongs to the technical field of treatment and restoration of polluted bottom mud. Background technique [0002] Sediment usually refers to the mixture of clay, silt, organic matter and various minerals, which is formed by depositing at the bottom of the water body after long-term physical, chemical and biological actions and water body transportation. Sediment can reflect the historical process of water body evolution, and is an important part of natural water ecosystems such as rivers, lakes, and tidal flats at river estuaries. [0003] Sediment pollution can be divided into organic pollution and inorganic pollution, inorganic pollution can be divided into nitrogen, phosphorus and other eutrophic substances pollution and heavy metal pollution. Organic matter, nitrogen, phosphoru...

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Problems solved by technology

[0009] The present invention aims at the current problem that the sediment agitation in the sediment dredging process easily causes the diffusion of suspended pollutants to pollute the surrounding water body, and provides a pollution bottom with strong pertinence, high degree of automation, and capable of precise control and low diffusion. Mud environmental protection dredging system, and the dredging method of the system

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