Characteristics of Acidic Gas Emissions from Combustion with Preblending of Coal and Sludge
석탄과 슬러지의 예혼합연소에 따른 산성가스 배출특성

Sung-Hoon Shim, Sang-Hyun Jeong, Hyo-Ki Min, Sang-Sup Lee
2014 Journal of Korean Society of Environmental Engineers  
Using dried sludge as a secondary fuel of a coal-fired power plant is proposed as an alternative option for sludge disposal. Because elemental contents of sludge are different from those of coal, different levels of acidic gas emissions are expected from the co-combustion of sludge with coal. In this study, sludge samples were obtained from 7 sewage treatment plants in Korea. Each sludge sample was combusted together with coal in a lab-scale combustor, and the concentrations of nitrogen oxides
more » ... of nitrogen oxides (NOx), sulfur dioxide (SO2), hydrogen chloride (HCl), chlorine (Cl2) in the flue gas were analyzed. Compared to the combustion of coal only, NOx concentration was slightly higher in the flue gas from the co-combustion of coal and sludge. SO2 emission increased with the combustion of sludge due to the higher content of sulfur in sludge than in coal. For most of the tested samples, the concentrations of HCl and Cl2 were varied depending on the chlorine content in the sludge sample.
doi:10.4491/ksee.2014.36.2.103 fatcat:n4t5ml7qwrhglcysp5a75wrdsm