Equipment and method for combined treatment of volatile organic compounds by photocatalysis and wet method

Abstract

The invention provides an apparatus and method for treating volatile organic compounds jointly by photocatalysis and wet process; the apparatus comprises a housing, a center ultraviolet lamp holder is suspended to the top wall of a cavity of the housing, and a center ultraviolet lamp tube is suspended to the bottom of the center ultraviolet lamp holder; an inner barrel sleeves the center ultraviolet lamp tube, an interlayer cavity is formed between the inner barrel and the housing, and the top of the interlayer cavity is sealed through a circular ultraviolet lamp holder; a plurality of side ultraviolet lamp tubes are suspended in the interlayer cavity; the sidewall of the housing is provided with a waste gas outlet communicated with the interlayer cavity. The apparatus and method have the advantages that photocatalytic oxidation process and wet absorption process in the VOCs treatment method are organically combined to obtain the integrated apparatus, and floor area is reduced; the method is low in waste water production and has self-cleaning function as compared with the traditional wet absorption of VOCs that produces mass wastewater; O3 produced during operation of the apparatus is made full use, and O3 concentration of the waste gas finally discharged is low.

Description

technical field [0001] The invention belongs to the technical field of volatile organic matter treatment, and in particular relates to a device and method for combined treatment of volatile organic matter by photocatalysis and wet method. Background technique [0002] Volatile organic compounds (volatile organic compounds, VOCs) are an important part of air pollutants and are the main components of PM 2.5 important precursors. Most VOCs are toxic and odorous, and some VOCs are carcinogenic, causing great harm to human health; under the action of sunlight, VOCs can also undergo photochemical reactions with nitrogen oxides in the atmosphere to generate more toxic photochemical smog . In recent years, VOCs have become one of the main air pollutants in our country, and the hazard accidents related to VOCs are increasing year by year. Therefore, the purification treatment technology of VOCs has become a research hotspot in the field of environmental catalysis. The "Ten Atmosph...

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Problems solved by technology

[0005] (1) Adsorption and absorption methods only transfer pollutants, but cannot effectively degrade them, and easily form secondary pollution

(2) The combustion method consumes a lot of energy and the cost is high; (3) The degradation efficiency of the biological method is low

However, during the photocatalytic oxidation process, a large amount of by-product O 3 , still pollute the atmosphere to a certain extent

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