摘要 |
PURPOSE: To provide a practical harmful gas removing apparatus wherein cleaning and regeneration of a photocatalyst layer can be effectively performed while the photocatalyst layer used for air purification in a large scale facility such as a ventilation setup for a tunnel for an motor vehicle road is arranged in a wind tunnel. CONSTITUTION: A photocatalyst layer 2 and an ultraviolet lump 3 are arranged in the trunk of a wind tunnel 1 through which air to be treated is passed and harmful gas components are adsorbed and caught on the photocatalyst layer 2 by irradiating the photocatalyst layer 2 with near ultraviolet light. The photocatalyst layer 2 is arranged on the inner wall face of the wind tunnel 1 in a vertical position. In addition, as a washing means for eluting and removing oxidates of atmospheric pollutants adsorbed on the photocatalyst layer 2 during regeneration of the photocatalyst layer 2, a spray-type washing means consisting of a washing water storing tank 5, water feeding pipeline 8 led in the wind tunnel 1 through a water feeding pump 6 on the tank and a washing water spraying nozzle 9 connected with the terminal of the water feeding pipeline 8 so as to spray pressurized washing water toward the photocatalyst layer 2 in the wind tunnel 1 is provided. |