Water treatment device based on mechanism of photocatalysis reaction of nano-crystalline titanium dioxide fiber

Abstract

The invention discloses a water treatment device based on a mechanism of a photocatalysis reaction of nano-crystalline titanium dioxide fiber. The water treatment device comprises photocatalysis reactors of the nanocrystalline titanium dioxide fiber, a water storage tank, a water pump, a first valve, a second valve, a flow meter, a spraying and aerating head, a water outlet pipe and a connecting pipe. The water treatment device has the advantages that multiple stages of square body type reactors are stacked together to realize equal-path parallel circulating water treatment, the number of thereactors can be conveniently increased and reduced, the efficiency of a photocatalysis circulating water treatment is high due to the adoption of a parallel mechanism, and the continuity is strong; ultraviolet lamps are horizontally placed above the reactors and parabola-shaped lampshades are adopted, so that light can be vertically incident into liquid levels to the maximal extent; as parallel clapboards are arranged, the flow rates of water flows in the reactions are obviously reduced, breakage and loss of the fiber, which are caused by overlarge impact of the water flows, are effectively avoided, and the strokes of the water flows in different time segments are uniform; and the water treatment device can be applied to large-flow dynamic continuous water treatment, makes large-scale treatment of industrial wastewater containing organic pollutants possible, has a simple structure, requires a low cost and has a broad prospect.

Description

technical field [0001] The invention belongs to the field of organic pollutant wastewater treatment, in particular to a water treatment device based on the photocatalytic reaction mechanism of nanocrystalline titanium dioxide fibers. Background technique [0002] The research on titanium dioxide photocatalytic technology has been nearly 40 years, and has made great progress in a few years. Compared with the leading countries of this technology, there is still a big gap in the processing and application of nano-titanium dioxide in my country. However, my country is rich in titanium resources, ranking first in the world, and its reserves account for 45% of the world's total. Nano-titanium dioxide has a wide range of uses and broad market prospects. Therefore, it is necessary to develop high-value-added nano-titanium dioxide-related products as soon as possible. Its application is extremely necessary and urgent. [0003] Most semiconductor photocatalysts are n-type semiconduct...

AI Technical Summary

Problems solved by technology

[0005] The traditional application forms of titanium dioxide are mainly nanopowder, film and support, but there are insurmountable defects in all of them.

For example, several types of titanium dioxide fiber photocatalytic reaction devices disclosed in patents such as CN. Fragmentation, serious loss phenomenon; ultraviolet light irradiation adopts optical fiber transmission, high cost, technical difficulty, and obvious optical loss

Patent CN.201010503062.6 puts the ultraviolet light source in the center of the reaction solution. Although the ultraviolet light is fully utilized, a quartz tube needs to be added outside to protect the ultraviolet lamp. After a certain period of time, the impurities in the organic wastewater are adsorbed on the surface of the quartz tube. It obviously hinders the irradiation of ultraviolet light; most of the reactors are closed systems, and the filling and replacement of fibers are very inconvenient; the overall design and structure of the existing reactors are complicated, the technical requirements are high, the promotion is difficult, and the actual application prospect is unclear

In addition, the addition of hydrogen peroxide oxidant can significantly improve the effect of photocatalysis, none of the above patents considered

In the existing technology, there is no mature and complete standard process for circulating water treatment using nanocrystalline titanium dioxide fiber photocatalysis

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