Spiral piezoelectric electro-catalysis sewage treatment device and treatment method

Abstract

The invention provides a spiral piezoelectric electro-catalysis sewage treatment device. The spiral piezoelectric electro-catalysis sewage treatment device structurally comprises a water inlet system and a spiral piezoelectric electro-catalysis system, the spiral piezoelectric electro-catalysis system comprises a spiral pipeline and a piezoelectric film; a water outlet of the water inlet system communicates with a water inlet of the spiral pipeline, and the piezoelectric film is located in the spiral pipeline. A method for sewage treatment by using the spiral piezoelectric electro-catalysis sewage treatment device comprises the following steps: 1, sewage and wastewater enter the water tank through a water inlet of the water inlet system, are regulated to a proper flow speed through the flow regulating valve, and enter the spiral pipeline; 2, sewage and wastewater pass through the spiral pipeline under the action of gravitational potential energy, and the sewage and wastewater are in full contact with the piezoelectric film in the spiral pipeline; and 3, under the irradiation of an ultraviolet lamp tube, carrying out photocatalytic degradation reaction on the photocatalytic material on the piezoelectric film and pollutants in the sewage and wastewater. The piezoelectric effect of the material is excited by utilizing water flow potential energy, and the device has the advantages of energy conservation, environmental protection and easiness in implementation.

Description

technical field [0001] The invention relates to a spiral piezoelectric photocatalytic sewage treatment device and a treatment method, belonging to the field of water pollution control. Background technique [0002] With the development of society and industrialization, the shortage of fossil energy and environmental pollution have posed a serious challenge to the sustainable development of human society and economy; how to use clean and renewable new energy to purify pollutants is to ensure people's health and sustainable social and economic development. Among them, solar energy, as an important part of the clean energy industry, has broad applications in photocatalytic degradation of pollutants; nano-photocatalysts utilize the strong redox properties of photogenerated electron-hole pairs under visible light or ultraviolet light, and are highly efficient , Rapidly remove organic pollutants in water bodies; however, nano-photocatalysts have problems such as easy sedimentation...

AI Technical Summary

Problems solved by technology

[0002] With the development of society and industrialization, the shortage of fossil energy and environmental pollution have posed serious challenges to the sustainable development of human society and economy; how to use clean and renewable new energy to purify pollutants is the key to ensuring people's lives and health and sustainable social and economic development Among them, solar energy, as an important part of the clean energy industry, has a wide range of applications in photocatalytic degradation of pollutants; nanophotocatalysts use the strong redox properties of photogenerated electron-hole pairs under visible light or ultraviolet light, and are highly efficient , and quickly remove organic pollutants in water; however, nano-photocatalysts have problems such as easy sedimentation, low utilization rate, and difficulty in recycling in actual water restoration. At the same time, due to the low quantum efficiency of semiconductor photocatalysts, semiconductor photocatalytic technology Difficult to achieve large-scale industrial application

[0003] The piezoelectric effect utilizes the asymmetry of crystal materials. When deformed by an external force, one end generates polarized positive charges and the other end generates negative charges. Under the action of the piezoelectric polarization field, photogenerated electrons and holes can Effectively separate and migrate in the opposite direction, which is conducive to the migration of bulk charges to the surface active center to participate in various photocatalytic reactions, thereby significantly improving the photocatalytic activity of the material. The mechanical force that induces the piezoelectric effect is mostly ultrasonic, ball milling, and vibration. etc.; however, the high-frequency ultrasonic input consumes a lot of energy and is not suitable for industrial applications; therefore, it is necessary to make full use of the water flow potential energy that exists widely in nature to develop a piezoelectric Photocatalytic degradation device has outstanding practical significance for alleviating the problem of urban domestic sewage treatment

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