폐기물 소각시설의 다이옥신(PCDD/DFs)에 대한 배출원 정의 및 배출특성

Abstract

This study was executed to figure out source identification and emission characteristics of PCDD/DFs discharged from municipal solid waste incinerators. According to waste incineration facilities, waste characteristic and air pollution control devices, actual data of PCDD/DFs discharged from incineration facilities was classified and analyzed. According to the comparative results by incineration quantity and waste characteristic, PCDD/DFs levels in medium size facilities were the highest value, on the other hand it was the lowest level from large size facilities. The flue gases passing through EP-WS-BF had the highest levels, however the result showed that exhausted gases from BF-WS-SCR had the lowest values of PCDD/DFs. The results of the 2,3,7,8-substituted isomers analysis shows that 2,3,4,7,8-PeCDF contributes to the level of PCDD/DFs. The annual emission levels were investigated by year. The annual levels were declined from 2002 to 2010. The correlation and ratio among the 2,3,7,8-substituted isomers were investigated. The interrelationship between PCDD/DFs and the data from gas analyzer shows that PCDD/DFs had the lowest levels when O2 is in 8∼11% and CO is under 300ppm, respectively. The emission assessment shows that PCDD/DFs emission has decreased steadily by year, however there is low correlation with the activity of facilities.