Abstract: Since 2017,the treatment on gypsum rain and wet plume from coalfired power plants have attracted a lot of public attention. Hebei, Tianjin, Jiangsu and other districts published emission standards of air pollutants, and corresponding techniques have been taken to lower the temperature and moisture content of flue gas, and reduce the emission of condensable particles such as soluble salts and SO3.Taking a 630MW coalfired unit in a Jiangsu power plant as the research object, its historical data from 2017 to 2018 were obtained and analyzed with normal distribution statistical method. The coal moisture content and the probability distribution of the smoke temperature at the inlet and outlet of the absorption tower were analyzed, and the design parameters of the project were determined.

Key words: coalfired power plant, wet plume removal, normal distribution；energy saving and emission reduction, project transformation, ultralow emission, colored plume