Closed photocatalyst carrier structure and its pollutant treatment system

Abstract

The invention discloses a closed photocatalyst carrier structure and its pollutant treatment system. The structure includes several photocatalyst carrier thin plates and ultraviolet light sources. The thin plates are all porous material thin plates of photocatalyst carriers. The surfaces of the thin plates are all loaded with photocatalysts, and there are gaps between the thin plates for the flow of pollutant fluids, wherein the gaps formed between the thin plates for the flow of pollutant fluids are closed or semi-closed. When the pollutant fluid flows through the carrier structure, the pollutant fluid stays in the cavity and then flows through the pores of the corresponding thin plate, which changes the flow path and residence time of the pollutant fluid, and can be more fully integrated with the photocatalyst on the carrier. The contact increases the contact probability between the pollutant fluid and the photocatalyst carrier, thereby enhancing the ability to treat pollutants, and greatly improving the purification efficiency of the carrier structure or the pollutant treatment system formed by the carrier structure for the pollutant fluid.

Description

technical field [0001] The invention relates to a photocatalyst processor for filtering pollutant fluid, more specifically to a closed photocatalyst carrier structure and a pollutant treatment system thereof. Background technique [0002] The photocatalytic properties of photocatalysts (such as nano-titanium dioxide) were discovered by Professor Fujiyu Akira in Japan in 1972, and have been extensively studied and applied so far. The basic principle of photocatalysis is: when semiconductor oxide (such as titanium dioxide) nanoparticles are irradiated by photons (such as ultraviolet light) with energy greater than the forbidden band width, electrons transition from the valence band to the conduction band, generating electron-hole pairs. Electrons are reducing, and holes are oxidizing. Holes react with OH- on the surface of oxide semiconductor nanoparticles to generate highly oxidizing OH radicals. Active OH radicals can oxidize many refractory organic compounds into CO2 and I...

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Problems solved by technology

[0008] The above-listed patent applications have proposed photocatalyst carrier structures of different structures. Although these carrier structures can obtain a very large effective specific surface area for ultraviolet light irradiation, like any technology, there are still some weak points in these carrier structures, such as , the fluid resistance of the carrier structure is small, when the pollutant fluid flows along the gap between the sheets under the carrier structure, and the fluid flow speed is fast, it will reduce the contact probability between the pollutant and the photocatalyst, so that these carrier structures cannot To meet the needs of strong treatment of pollutants, the treatment capacity is still weak in this environment, and further improvement of its structure is still needed

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