Device for photocatalytic abatement of organic pollution of riverway

Abstract

The invention discloses a device for photocatalytic abatement of organic pollution of a riverway. The device provided by the invention is characterized in that the device is provided with a tapered cylinder; the tapered cylinder is sleeved on a quartz tube; the quartz tube is arranged at an axis part of the tapered cylinder and is coaxial with the tapered cylinder; a ultraviolet tube is arranged in the cavity of the quartz tube; pointed cones are uniformly distributed on an inner side and an outer side of the tapered cylinder; the pointed cones arranged on the inner side of the tapered cylinder are coated with TiO2 for ultraviolet catalysis; the pointed cones arranged on the outer side of the tapered cylinder are coated with nitrogen-doped TiO2 for sunlight catalysis; at least one bearing is sleeved on the ultraviolet tube; multiple fan vane-shaped blades are fixedly connected between at least one outer ring of the at least one bearing and the inner wall of the tapered cylinder; the fan vane-shaped blades are uniformly distributed along the periphery of the outer ring of the at least one bearing; surfaces of the fan vane-shaped blades are coated with TiO2; a lower half of the tapered cylinder is immersed in a river; and a large end mouth of the tapered cylinder is arranged oppositely to a flowing direction of a water flow in a riverway. Under water flow action, the tapered cylinder rolls automatically and continuously so that a thin liquid film is formed. The device provided by the invention can utilize sunlight and ultraviolet light, and realizes a large catalytic reaction surface area, thin thickness of a water film on a catalytic reaction surface, and good catalysis effects.

Description

Technical field [0001] The invention relates to a photocatalytic treatment device for river organic pollution, and belongs to the technical field of sewage treatment in environmental protection. Background technique [0002] Traditional water treatment methods have low efficiency, high cost, and secondary pollution problems, and sewage treatment has not been well resolved. In 1972, A. Fujishima and K. Honda worked on n-type semiconductor TiO 2 The photoelectrocatalytic decomposition of water was found on the electrode, TiO 2 It has high oxidation activity, good chemical stability, non-toxic to human body, low cost, no pollution, and wide application range, so it is the most valued. It is currently the most widely used nano-photocatalytic material, and it is also the most promising green environmental protection type. catalyst. [0003] Nano TiO 2 It can treat a variety of toxic compounds, and can quickly and completely oxidize hydrocarbons, halogenated hydrocarbons, acids, surfact...

AI Technical Summary

Problems solved by technology

In fact, no matter in the ultraviolet or visible light region, the organic solution (especially the colored organic wastewater) will have different degrees of light absorption, which will inevitably cause different degrees of light loss of the excitation light, making the light reaching the surface of the catalyst The intensity decreases, which reduces the yield of photogenerated electrons and holes, and finally reduces the degradation efficiency of pollutants.

[0005] River water pollution is serious, seriously affecting rural irrigation and drinking water. Photocatalysis is an effective water treatment method. Currently, the existing treatment methods suitable for rural rivers mainly rely on aquatic biological treatment, or use the visible light catalysis of sunlight. The catalytic treatment cycle is long and the effect is not obvious

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