Circulating water treatment device and process using nanocrystalline titanium dioxide fiber photocatalysis reactor

Abstract

The invention discloses a circulating water treatment device and a circulating water treatment process using a nanocrystalline titanium dioxide fiber photocatalysis reactor, which are used for treating organic pollutant waste water. Compared with the prior art, the reactor is innovative and has remarkable advantages in the aspect of structural designs: through unique water intake expanding and decelerating, uniform current distribution and a surrounding ring overflow water outlet structure at the upper port of an inner barrel, relatively high water flow rate is ensured and fiber breaking and loss caused by over high water current flow speed are avoided; an ultraviolet lamp is arranged at the axle enter position of the reactor, so that ultraviolet light is utilized to the maximum extent; a photocatalysis reaction is considered fully and treated waste water is sprayed and filled with oxygen; the device has a simple structure and low manufacturing cost and is convenient to assemble; and the photocatalysis circulating water treatment process has high efficiency, low energy consumption and important practical value and can perform high-flow continuous water treatment.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, in particular to a circulating water treatment device and process using a nanocrystalline titanium dioxide fiber photocatalytic reactor. Background technique [0002] Semiconductor photocatalytic oxidation technology can generate strong oxidizing free radicals under ultraviolet light irradiation, quickly and non-selectively oxidize and decompose various toxic organic pollutants in water, and can quickly kill bacteria and viruses in water without causing secondary pollution. Pollution, simple operation, low energy consumption, very broad application prospects in the field of water treatment. [0003] Among many semiconductor photocatalysts, titanium dioxide has attracted much attention due to its high photocatalytic activity, non-toxicity and harmlessness. However, the traditional application forms of titanium dioxide are mainly nano-powders, films and supports, all of which have...

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Problems solved by technology

[0006] The existing technology has not been able to completely and well solve the above problems, such as several types of titanium dioxide fiber photocatalytic reaction devices disclosed in patents CN. The problem of impacting fibers, especially at the water outlet, because the water outlet is directly set on the wall of the reactor, the cross-sectional area of ​​the water flow is suddenly reduced, and the water flow speed is sharply accelerated at the water outlet, which is very easy to carry the fiber out of the water outlet; the ultraviolet light irradiation adopts optical fiber The transmission of ultraviolet rays from sunlight has the problems of large light transmission loss, uneven luminous points, and high cost, or the use of ultraviolet light sources to irradiate above the reactor, resulting in serious light waste; the overall structure of the reactor is complicated, fiber assembly is inconvenient, and the cost is high. advanced questions

In addition, the photocatalytic reaction must have O 2 participation, which is not considered in any of the aforementioned patents

The prior art has not yet used titanium dioxide fiber photocatalytic reactors to form a complete water treatment process

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