Analysis of Environmental Impact Factors of Natural Draft Cooling Towers in Power Plant

Abstract

Based on the requirements of Air Clean guidelines (VDI3784 and VDI3945) in German for cooling tower plume rise and dispersion model, a comparative analysis of atmospheric environmental impact of the cooling tower exhaust for different parameters. Parameters includes different source emission parameters and ambient humidity parameters. Then, analysis of the impact factors of plume rising height and the ground concentration according to the emission parameters. The results show that the most influential parameters are temperature and gas flow rate, relatively, the flue gas relative humidity and liquid water content has less influence in the rising height. Therefore, the increase of flue gas flow rate will significantly strengthen the dispersion of pollutants in the air. The flue gas humidity and liquid water have a certain influence on the dispersion of pollutants, but the effect is not so significant. The increase of flue gas humidity and liquid water content is not conducive to the dispersion of pollutants, therefore the surface concentration will only increase slightly.