Drainage basin desilting and repairing system

Abstract

The invention discloses a drainage basin desilting and repairing system comprising an air compression device arranged on a river bank of a treatment area, a desilting air compressor arranged on the river bank of the treatment area and a plurality of aeration devices arranged in the direction of a river channel; the aeration devices are arranged at the bottom of river water in the river channel atintervals and make contact with riverbed sludge in the river channel, and a desilting nozzle is arranged between arbitrary two adjacent aeration devices. The air compression device is connected with each aeration device through an air pipeline, and the air compressor is connected with each desilting nozzle through a high-pressure air pipe; river channel sludge is pushed into water from the bottomof a riverbed through the desilting nozzles, then the sludge is stirred through the aeration devices capable of guaranteeing high aeration efficiency, the dissolved oxygen content of the water body isincreased, the oxygen consumption reaction process is accelerated, water body repairing is facilitated, a water ecological system is perfected, and the ecological function and the adjusting functionof the river channel are restored.

Description

technical field [0001] The invention relates to the field of environmental engineering, in particular to a dredging and restoration system for watersheds. 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, showing a state of color and smell, but aquati...

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 dredging by interception or in-situ dredging, the economic investment is large, the sediment can only be transferred, the reconstruction of the ecosystem is difficult and takes a long time, and the sludge produces secondary pollution, which requires further treatment; at the same time, The aeration device is a commonly used device to increase the dissolved oxygen in the process of dredging and repairing, but the current aeration device still has the problem of not being efficient enough

Images