Environment-friendly system for dredging river course and treating bottom mud in on-line manner

Abstract

The invention relates to the technical field of the dredging of river courses, and discloses an environment-friendly system for dredging a river course and treating bottom mud in an on-line manner. The environment-friendly system comprises a vacuum mud suction ship, a bottom mud dehydrating and drying ship and an operation management system, wherein the vacuum mud suction ship is provided with a vacuum mud suction device; the bottom mud dehydrating and drying ship comprises a dosing device used for accelerating the flocculation and deposition of slurry of silt as well as a sludge / garbage separating device, a sludge concentration tank, a sludge conveying pump, a belt sludge filter press and a filter tank, which are arranged according to the treatment sequence of the sludge and are further connected in sequence; a sludge outlet end of the vacuum mud suction device on the vacuum mud suction ship is connected to the sludge / garbage separating device on the bottom mud dehydrating and dryingship through a mud discharge pipe; the filter tank is connected to the sludge concentration tank through a sewage pump and a pipeline; a supernatant solution overflow pipe is arranged in the sludge concentration tank. The environment-friendly system is used for realizing the continued and streamlined on-line operation of the dredging of the river course and the treatment of the bottom mud; the dredging is free from disturbance; the slurry does not fall to the ground, and the residual water is discharged up to a standard.

Description

technical field [0001] The invention relates to the technical field of river channel dredging and bottom mud treatment, in particular to an environment-friendly river channel dredging and bottom mud online treatment system. Background technique [0002] With the vigorous development of black and odorous water treatment in rivers such as rivers, ponds, lakes and reservoirs in China, maintenance dredging in the later stage has become an important means to maintain the health of water ecology and water environment. However, the traditional dredging equipment not only has a large capacity increase rate during the dredging process, but also when the traditional dredging equipment is used to dredge the silt (shallow sediment deposited at the bottom of the water body), it is easy to cause a large disturbance of the water body and cause secondary pollution. Secondary pollution, the mud from dredging needs to be transported by pipeline or tank truck to a fixed mud treatment station f...

AI Technical Summary

Problems solved by technology

However, the traditional dredging equipment not only has a large capacity increase rate during the dredging process, but also when the traditional dredging equipment is used to dredge the silt (shallow sediment deposited at the bottom of the water body), it is easy to cause a large disturbance of the water body and cause secondary pollution. Secondary pollution, the mud from dredging needs to be transported by pipeline or tank truck to a fixed mud treatment station for post-treatment. The mud with low solid content not only increases the cost of transportation, but also increases the cost of post-treatment of dredged residual water

[0003] In addition, since conventional mud treatment usually adopts storage yard drying and mud treatment stations, etc., and the cleared sludge has the characteristics of fine particles, light bulk density, high organic matter content, and high moisture content, relying on natural drying at the storage yard and manual intervention to dry It often takes a long time to consolidate and dry, and the time is long and the efficiency is low.

At the same time, a large amount of silt needs to occupy a large amount of land to be piled up. If it is not treated in time, it will directly affect the follow-up projects, and it is easy to produce unpleasant odors, and may form mud with precipitation and enter the reservoir to cause secondary pollution.

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