Photoreaction simulation device and method for degrading pollutants in flood discharge atomized water body

Abstract

The invention provides a photoreaction simulation device and method for degrading pollutants in a flood discharge atomized water body. The device comprises a double-layer glass reactor, an illumination system, an oxygen exposure sprayer, a magnetic stirrer and a constant-temperature water tank; the inlet end of the oxygen exposure sprayer is communicated with an air compressor and a reagent bottle, and the outlet end of the oxygen exposure sprayer is communicated with the double-layer glass reactor; and the oxygen exposure sprayer is used for performing water-gas mixing on compressed gas provided by the air compressor and initial reaction liquid input by the reagent bottle to form dissolved oxygen over-saturated reaction liquid, and then atomizing the dissolved oxygen over-saturated reaction liquid into small liquid drops to form a water-air micro-interface environment in the double-layer glass reactor. The device integrates the functions of oxygen exposure, atomization, photooxidation, water quality monitoring, constant temperature control and the like, can simulate the dissolved oxygen over-saturation and atomization illumination conditions in the flood discharge atomized water body, is simple and reliable in structure, and can provide technical support for research on photoreaction rules and migration and transformation behaviors of pollutant degradation in the flood discharge atomized water body.

Description

technical field [0001] The invention belongs to the intersection field of water conservancy engineering and environmental protection, and in particular relates to a photoreaction simulation device and method for degrading pollutants in a water body under the condition of dam flood discharge and atomization. Background technique [0002] The construction and operation of reservoirs is an important way for humans to transform and utilize rivers and lakes. Flood discharge atomization is a typical hydraulic phenomenon in the operation of large reservoirs. Due to the need for flood control, reservoirs often need to release floods during the flood season to lower the water level of the reservoir. These reservoir dams have common characteristics such as "high water head, high flow velocity and large flow". Flood discharge atomization is due to the aerated spallation of the water tongue and the fog flow formed by the water splash when the water tongue enters the water. The rain and...

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Problems solved by technology

The patent document (application number 201210258417.9) discloses a device for studying the distribution law of flood discharge atomization fog sources. This device cannot simulate the supersaturation of dissolved oxygen and light conditions in flood discharge atomization water. It is still an open system, and the device occupies an area of Big

The patent document (application number 201820068609.6) discloses a strong positive pressure spray aeration system. In the process of blowing air to the atomization area through the oxygen generator and spraying the gas-liquid mixture from the nozzle to the atomization area, a strong positive pressure is formed in the atomization area. pressure, so as to increase the dissolved oxygen content in the water for sewage treatment, but the oxygen dissolved efficiency of the device is not high, it cannot reach the supersaturated state of dissolved oxygen in the water body, and it cannot simulate the sunlight

The patent document (application number 201922254366.2) discloses a micro-droplet photoreaction device for industrial wastewater. This device cannot realize the condition that the water body suddenly reaches supersaturation of dissolved oxygen, and cannot select the emission wavelength of the light source, nor can it monitor the physical and chemical properties of the reaction system in real time. Parameters, the limitations in the experiment are relatively large, and it cannot simulate more photoreaction states of flood discharge atomization

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