Pressurized dissolved gas enhanced ozone pre-oxidation capability device and processing method thereof

Abstract

The invention relates to a pressurized dissolved gas enhanced ozone pre-oxidation capability device and a processing method thereof. The pressurized dissolved gas enhanced ozone pre-oxidation capability device comprises an ozone preparation system, a pressurization system, a pressure dissolved gas system and a release system; the ozone preparation system comprises an ozone generator, a gas storagetank and a regulating valve; the pressurization system comprises a pressurization pump and a check valve; the pressure dissolved gas system comprises a pressure tank and a plurality of aeration heads, the plurality of aeration heads are arranged at the lower part in the pressure tank, and a water inlet pipe and a water inlet valve are arranged at the bottom; the release system comprises a water outlet pipe, a water outlet valve, a dissolved gas release head and a release tank; the ozone generator is communicated with the gas storage tank through a first gas conveying pipe, the gas storage tank is communicated with the pressurization pump through a second gas conveying pipe, and the regulating valve is arranged on a second gas conveying pipe; one end of the pressurization pump is communicated with the gas storage tank through the second gas conveying pipe, and the other end of the pressurization pump is communicated with the aeration heads in the pressure tank through a third gas conveying pipe. Through the pressurized dissolved gas enhanced ozone pre-oxidation capability device and the processing method thereof provided by the invention, the pretreatment requirements of industrialsewage can be met, the biochemical properties of the sewage is improved, and no secondary pollutant is generated.

Description

technical field [0001] The invention relates to a pressurized gas-dissolved enhanced ozone pre-oxidation capacity device and a treatment method thereof, which are suitable for pretreatment of high-concentration industrial organic wastewater and urban industrial wastewater, and belong to the technical field of organic wastewater treatment. Background technique [0002] The method of pre-oxidation + adsorption + biological treatment is generally used to treat high-concentration organic wastewater. The purpose of pre-oxidation is to crack high-molecular organic matter into small-molecular organic matter, improve the biodegradability of wastewater, and facilitate subsequent treatment. Pre-oxidation methods include the Fenton method, ozone oxidation and other forms. Because ozone is a strong oxidant, it has the characteristics of good oxidation effect and no secondary pollution, so it is widely used in industrial wastewater treatment. [0003] The ozone pre-oxidation ability is ...

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Problems solved by technology

The traditional ozone dosing is to aerate the water with the aerator head under normal pressure (open type), the diameter of the generated ozone bubbles is large, the residence time in the water is short, the ozone utilization efficiency is low, and the pre-oxidation effect is general. At present, some scholars propose to use The gas-liquid two-phase pump inhales ozone while pumping water, dissolves ozone into the water, prolongs the residence time of ozone in the water, and increases the mass transfer efficiency. At the same time, the micro-nano bubbles generated during the release of high-pressure water vapor can promote the hydroxyl radical Generate and improve the ozone pre-oxidation ability, but the water-air ratio (volume) of the gas-liquid two-phase pump is generally 5-10%, and the amount of ozone absorbed by the mixing pump is small, so it is difficult to greatly increase the ozone concentration in the wastewater

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