Drainage basin water ecology in-situ dredging repairing system and method

Abstract

The invention discloses a drainage basin water ecology in-situ dredging repairing system and method. The system comprises a dredging ship body (12) positioned on a riverway water surface of a treatment area, an air compressor (10) installed in the dredging ship body (12), a dredging sprayer (4) positioned in riverbed sludge (1), a high-pressure air pipe (7) communicated with the air compressor (10) and the dredging sprayer (4), multiple nano aerating devices (3) distributed at the bottom of river water (2), and an air compressing device for providing compressed air to the nano aerating devices(3). The system is capable of using the dredging sprayer to push the riverway sludge from the bottom of the riverbed into the water, stirring the sludge through the nano aerating devices, increasingdissolved oxygen content of a water body, accelerating oxygen consumption reaction progress, realizing in-situ repair of the water body in the case without closure and tube storage, completing a waterecosystem, recovering an ecological function and an adjusting function of a riverway, and reducing treatment cost of the riverway.

Description

technical field [0001] The invention relates to the field of environmental engineering, in particular to a system and method for ecological in-situ dredging and restoration of river basin water. Background technique [0002] With the development of industry, human activities, water shortages, and water pollution, the ecological and regulatory functions of water system basins have been severely damaged, resulting in polluted water bodies, and even black and odorous water bodies. The black and odorous water body is mainly caused by the lack of oxygen in the water body, and it is also related to the eutrophication of the water body and sediment deposition. The research results of major national water special projects show that when the dissolved oxygen is as low as 2.0mg / L, the water body will be in a state of anoxic state. When the dissolved oxygen is 3mg / L~5mg / L, the organic matter and ammonia nitrogen content in the water will generally exceed the surface V standard, showin...

AI Technical Summary

Problems solved by technology

At the same time, the fluidity of water bodies that have lost their ecological functions often decreases or disappears completely, which directly leads to the decline of the reoxygenation capacity of the water bodies. The problem of oxygen deficiency in some water areas or water is serious, forming hydrodynamic conditions for rapid algae reproduction, increasing the risk of algae outbreaks, and causing Deterioration of water quality

[0003] To sum up, the main method to prevent black and odorous water bodies is to increase the dissolved oxygen content of water bodies. However, water bodies that have been polluted for a long time have low self-purification ability, or even have completely lost their self-purification ability to form black and odorous water bodies. For the purpose of controlling black and odorous water bodies, currently such polluted black and odorous water bodies are generally treated by intercepting sewage pipes, intercepting dredging, in-situ dredging, etc., and rebuilding the ecological system.

Regardless of whether it is interception dredging or in-situ dredging to clean up the sediment, the economic investment is large, the sediment can only be transferred, the ecological system reconstruction is difficult and takes a long time, and the sludge produces secondary pollution, which needs further treatment.

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