Abstract: In order to study the distribution and enrichment of the trace elements in the emissions from power plants and the synergistic removal of the trace elements from conventional pollutant purification facilities(SCR, ESP, WFGD, WESP), the concentration of the trace elements (Be, Cr, Mn, Co, Ni, As, Se, Cd, Sb, Pb, Hg) in the emissions of smoke and air pollutant control devices are tested by using US EPA Method 29 in a 350 MW coal-fired power unit. The results show that the trace elements that are mainly distributed in the fly ash and the gypsum takes 54.51%~97.58% and 1.61%~38.08% respectively of the total amount of emitted trace elements, while much less are distributed in the bottom ash and the chimney inlet flue gas. The overall removal rate through air pollutant control devices is 91.98%~99.98%. The concentration of trace elements in the stack is 0.02~9.23 μg/m³, and the concentration values of Mn, As, Se, Pb concentrations are much higher than the ones that are required for the new coal-fired unit trace elements emission quality standards issued by EPA.

Key words: coal-fired power plant, trace elements, air pollutant control devices, co-removal, emission reduction control