Closed photo catalyst carrier structure and pollutants treatment system thereof

Abstract

The invention discloses an enclosed-type photo-catalytic-carrier structure and the pollutant disposal system. The structure includes a plurality of photo-catalytic-carrier sheets and ultraviolet sources, wherein, all sheets are photo-catalytic-carrier porosint sheets, with a plurality of sheets are arranged and combined around the ultraviolet source; photo-catalysts are carried on the surface of each sheet; clearances for pollutant fluid to flow are left between each sheet and are enclosed or partly-enclosed. While the pollutant fluid flows through the carrier structure, the pollutant fluid flows from the corresponding clearance after resorting in cavities, so that the circulation path and the residence time of the pollutant fluid are changed. As the photo-catalysts on the carriers can be fully contacted, the contacting probability between the pollutant fluid and photo-catalytic carriers is increased, so that the pollutant disposal capacity is enhanced and the purification efficiency of carrier structure or the pollutant system formed by carrier structures to the pollutant fluid is greatly improved.

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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