Device and method for removing volatile organic compounds in air by photocatalysis

Abstract

The invention discloses a device and a method for removing volatile organic compounds in air by photocatalysis. The air inlet a of an air distribution bottle is communicated with the air outlet pipe of a reactor through an air circulation pump and a rotor flowmeter in sequence; the air outlet b of the air distribution bottle is communicated with the bottom of the reactor of a photocatalysis reaction device; TiO2 photocatalyst loaded on a titanium sheet is evenly tiled on the bottom of the reactor; the top of the reactor is provided with an illuminant light by being vertical to the bottom of the reactor; the air outlet d of the reactor is communicated with a gas chromatograph after being subjected to sampling by the air outlet pipe of the reactor; the position, which is near the air outlet d, of the air outlet pipe of the reactor is connected with a tail gas absorber through a branch air outlet pipe. The photocatalyst is tiled, an ultraviolet lamp light source vertically irradiates the catalyst, light utilization efficiency is improved, and the device has the advantages of simple structure, convenience in control, energy saving and low operation cost. Toluene photocatalytic degradation efficiency reaches 93.72%, and volatile organic compound (VOCs) pollutants in the air can be effectively removed.

Description

technical field [0001] The invention belongs to the field of research and development and application of air pollution control equipment, in particular to a device and method for photocatalytically removing volatile organic compounds (VOCs) in air. Background technique [0002] Volatile organic compounds (VOCs) in the air are a relatively common complex organic pollutant in the atmosphere. Even at very low concentrations, these organic compounds will emit a strong unpleasant smell. Among them, many VOCs are toxic and It is carcinogenic and endangers human health. Some VOCs species have strong photochemical reaction characteristics, and can undergo photochemical conversion under sunlight to generate photochemical smog. In addition, VOCs have an important impact on the generation of urban and regional ozone, and are also one of the important precursors that cause haze weather. one. Therefore, VOCs pollution is an important factor leading to compound air pollution, and it is ...

AI Technical Summary

Problems solved by technology

Although traditional incineration can oxidize pollutants into H 2 O and CO 2 , however, requires the temperature to exceed 800-1200 ° C to completely destroy the pollutants

This method is expensive, incomplete combustion can produce by-products, and if the cooling is not properly controlled, it will produce dioxins. In addition, NOx is easily formed during high-temperature combustion

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