UV photocatalysis purifier for waste gas treatment

NegotiableUpdate on September 29

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Overview

UV photocatalysis purifier for waste gas treatment

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Suitable environment for photocatalytic oxidation: photocatalytic oxidation is suitable for the complete oxidation and purification of toxic and harmful odor components such as waste gas odor into non-toxic and harmless low molecular components at room temperature. It is suitable for the treatment of toxic and harmful gases with high concentration (the concentration can be evenly passed by pretreatment), large gas volume (the equipment can be combined for treatment) and strong molecular structure stability
Principle of photocatalytic oxidation process
1. Photocatalytic oxidation is a catalytic action under the action of External visible light. The photocatalytic oxidation reaction uses semiconductor and air as catalyst and light as energy to degrade organic matter into CO2, H2O and other non-toxic and harmless components. The company uses artificial ultraviolet light wave as energy, combined with the nano-TiO2 catalyst with the strongest activity and the highest reaction efficiency after special treatment by our company, the waste odor gas can achieve more ideal purification effect after treatment.
2. In the semiconductor photocatalytic oxidation reaction, the nano-TiO2 catalyst is irradiated by ultraviolet light, and the nano-TiO2 catalyst absorbs the light energy to generate electron and hole transitions. After further combination, the electron hole pairs are generated, which react with the water (H2O) and oxygen (O2) adsorbed on the exhaust gas surface to generate hydroxyl radicals (OH -) and superoxide ion radicals (O2 -, 0 -). It can reduce all kinds of organic waste gas such as aldehydes, benzene, ammonia, nitrogen oxides, sulfide and other VOC organic and inorganic compounds to carbon dioxide (CO2), water (H2O) and other non-toxic and harmless substances under the action of photocatalytic oxidation. After purification, the waste gas molecules are activated and degraded, and the odor disappears at the same time, playing the role of waste gas deodorization, At the same time, the bacteria and viruses in the pipeline can be effectively removed. Because there is no additive in the process of photocatalytic oxidation reaction, there will be no secondary pollution. In terms of operation cost, only electric energy is used, and there is no need to replace accessories frequently, which is quite energy-saving and environmental protection for the use of enterprises.
Characteristics of photocatalytic oxidation
(1) Suitable environment for photocatalytic oxidation: photocatalytic oxidation is suitable for completely oxidizing and purifying toxic and harmful odorous components such as waste gas odor into non-toxic and harmless low molecular components at room temperature. It is suitable for treating toxic and harmful gases with high concentration (the concentration can be evenly passed by pretreatment), large gas volume (the equipment can be combined for treatment) and strong molecular structure stability.
(2) Effective and thorough purification: through photocatalytic oxidation, the organic waste gas in the air can be directly oxidized into non-toxic and harmless substances without any secondary pollution,
(3) High efficiency and energy saving: photocatalytic oxidation uses vacuum ultraviolet light generated by artificial ultraviolet lamp as energy to activate the photocatalyst and drive the oxidation-reduction reaction. Moreover, the photocatalyst is not consumed in the reaction process. The water and oxygen on the surface of waste gas odor are used as oxidants to effectively degrade toxic organic waste gas, which becomes a highly efficient way of photocatalytic purification The biggest feature of energy saving.
(4) Strong oxidizability: semiconductor photocatalysis has the characteristics of strong oxidizability. It can effectively decompose some organic substances that are difficult to be oxidized by ozone, such as chloroform, carbon tetrachloride, hexachlorobenzene, and finally reduce them to carbon dioxide (CO2), water (H2O) and other non-toxic and harmless substances. Therefore, it has special significance for organic substances that are difficult to be degraded, The effective oxidants of photocatalysis are hydroxyl radical (OH -) and superoxide radical (O2 -, O -), and their oxidizability is higher than that of common ozone, hydrogen peroxide, potassium permanganate, hypochlorite, etc.
(5) Broad spectrum: photocatalytic oxidation is effective for many kinds of organic compounds from hydrocarbon to carboxylic acid, even for atomic organic compounds such as halogenated hydrocarbons, dyes, nitrogen-containing organic compounds and organophosphorus pesticides. As long as a certain reaction time and reaction environment ratio are reached, complete oxidation can be achieved. It can be said that the oxidation object of hydrogen and oxygen free radicals is almost non selective, It can react with any existing substance.
(6) Long service life: theoretically speaking, because the catalyst in the photocatalytic oxidation reaction does not directly participate in the redox, there is no loss, the service life is infinite, and there is no need to replace.