An environmentally friendly dredging method

Abstract

Provided is an environment-friendly dredging method. An environment-friendly dredging device with an excavating system and a soil conveying system is characterized in that the environment-friendly dredging device opens and lowers an excavating bucket chamber at the speed of 1-2 meter / second to a position 1-3 meters above a bottom mud face, and the lowering speed is converted from 1-2 meter / second into 0.1-0.4 meter / second. After the environment-friendly dredging device is lowered to the dredging depth, the environment-friendly dredging device excavates and closes the bucket chamber at the speed of 0.01-0.06 meter / second. After excavation is finished, when the environment-friendly dredging device is lifted to a position within 3 meters to the mud face, the lifting speed is 0.1-0.4 meter / second. During a shifting period of the environment-friendly dredging device, the environment-friendly dredging device is moved to another dredging point at the speed of 0.8-1 meter / second, simultaneously an oil cylinder driving extruding plate is extruded, and the extruding speed is 0.01-0.05 meter / second. After an extruding process is finished, a dredging object conveys mud outwards through a one-way mud conveying device. After the extruding plate returns to the position, the environment-friendly dredging device conducts next dredging cycle.

Description

technical field [0001] The invention relates to a dredging method. Background technique [0002] At present, the dredging methods commonly used in river and lake environmental protection dredging projects include cutter suction dredging of cutter suction dredgers, open dredging of chain bucket ships and grab ships, etc. These dredging methods are used in the actual dredging process, such as cutter suction dredging The cutter suction dredging device of the dredger generally has severe disturbance during the dredging process, which makes the dredged object violently stirred during the dredging process, especially in the process of dredging toxic and harmful polluted sediment, and the risk of secondary release of pollution increases. At the same time, due to the low concentration of the dredging mud sucked up by the cutter suction dredging device, the treatment volume of dredged residual water is large. During the dredging process, the chain bucket ship and the grab ship are a...

AI Technical Summary

Problems solved by technology

[0002] At present, the dredging methods commonly used in river and lake environmental protection dredging projects include cutter suction dredging of cutter suction dredgers, open dredging of chain bucket ships and grab ships, etc. These dredging methods are used in the actual dredging process, such as cutter suction dredging The cutter suction dredging device of the dredger generally has severe disturbance during the dredging process, which makes the dredged object violently stirred during the dredging process, especially in the process of dredging toxic and harmful polluted sediment, the risk of secondary release of pollution increases

At the same time, due to the low concentration of the dredged mud sucked up by the cutter suction dredging device, the dredged residual water has a large amount of treatment.

During the dredging process, the chain bucket ship and the grab ship are always in an unclosed state during the dredging process. When the dredged material is excavated from the bottom of the lake, the dredged material will leak from the open chain bucket or open grab bucket. Causes secondary release of pollutants, so it is not suitable for dredging operations on toxic and harmful dredged materials

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