A Method for Promoting the Release of Supersaturated Total Dissolved Gases Using Water-blocking Medium

Abstract

The invention relates to a method for promoting releasing of supersaturated TDG through water blocking media, and belongs to the technical field of dissolved gas supersaturation of hydraulic engineering. The method includes the step that the water blocking media are added into a water passing channel in an experiment water tank to achieve releasing of the supersaturated TDG. According to the method, the larger the arrangement density of the use water blocking media is, and the rougher the surface of the use water blocking media is, the higher the promoting of releasing of TDG is; the promoting effect of the stagger-arrangement water blocking media on releasing of the TDG is better than that of the alignment-arrangement water blocking media on releasing of the TDG. The method has the important theoretical value and the important engineering significance in researching work of the aspects of mitigating supersaturation of the TDG in hydraulic-engineering water drainage and aquaculture, mitigating the negative influences on fishes and the like, and meanwhile essential data and theoretical bases are provided for researching measures for mitigating the influence of the supersaturated TDG.

Description

technical field [0001] The invention relates to a supersaturated total dissolved gas technology, in particular to a new method and an experimental device for promoting the release of supersaturated total dissolved gas in water by using a water-blocking medium, belonging to the technical field of water conservancy engineering dissolved gas supersaturation. Background technique [0002] There are many high dams in my country. When these high dams discharge water to downstream rivers through spillways, flood tunnels and other discharge structures during the flood season, the gas will be sucked into the water body and dissolved into the water in the high-pressure environment of the pool. When the water in the pad pond flows into the downstream channel, due to the pressure drop, the total dissolved gas (TDG) in the water will gradually precipitate out, resulting in the oversaturation of the downstream channel TDG. Since the supersaturated TDG releases slowly in the process of tra...

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Problems solved by technology

[0004] At present, the usual means to solve the supersaturated TDG problem caused by drainage is to improve the design of drainage structures and optimize the operation mode of drainage, but there are many restrictive factors: (1) Most of our country has built high dams, Due to both technical and economic constraints, it is not suitable to use diversion devices; (2) The dynamic scheduling research is mainly based on the goal of reducing water abandonment and slowing down gas supersaturation in the downstream, without comprehensive consideration of flood control, shipping, power generation, ecology, and reservoir areas (3) Most of the existing research focuses on reducing the generation of supersaturated TDG, but there are few reports on how to accelerate the release of supersaturated TDG in the downstream channel.

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