OPERATING AND CONTROLLING METHOD OF DEVICE FOR REMOVING HARMFUL GAS

摘要

PURPOSE:To reduce consumption of electric power of a device for removing harmful gas which is constituted of the mixture of activated carbon and TiO2 and also a light source for irradiating the mixture with light. CONSTITUTION:Gas sensors 11, 12 are provided in the inlet and the outlet of air in a device 1 for removing harmful gas and measure the concentration of harmful gas at the respective components. Both the quantity of light of a light source 6 and the air quantity of a blower 9 for introducing air into the device 1 for removing harmful gas are changed on the basis of the measured result. The layers 5 of a mixture are essentially irradiated with light of >=300nm emitted from the light source 6 in order to remove NO and SO2. On the other hand NO2 is directly adsorbed on activated carbon contained in the layers 5 of the mixture even when light is not irradiated. Therefore, when the concentration of NO and SO2 is low, the number of electrified light sour<' 6 is reduced by control of a power source 7 by a controlling part 8 and the consumption of electric power is reduced.