순환유동층 연소로에서 하수슬러지/목질계 바이오매스 혼합펠릿의 연소: 오염물질 저감을 위한 산화제 변화 영향

• Published in: 한국연소학회지 Vol. 25; no. 1; pp. 37 - 47
• Main Authors: 백건욱(Geon-Uk Baek), 문지홍(Ji-Hong Moon), 조성호(Sung-Ho Jo), 박성진(Sung-Jin Park), 김재영(Jae-Young Kim), 최유진(Yu-Jin Choi), 배달희(Dal-Hee Bae), Nguyen Hoang Khoi, 이규복(Kyubock Lee), 문태영(Tae-Young Mun)
• Format: Journal Article
• Language: Korean
• Published: 한국연소학회 01.03.2020
• Subjects: 기계공학; Superficial velocity; Equivalence ratio; Oxidants; Pollutants; Sewage sludge; Circulating fluidized bed combustion
• ISSN: 1226-0959; 2466-2089
• DOI: 10.15231/jksc.2020.25.1.037

Combustion experiment for pellets of sewage sludge and woody biomass blend was conducted in a pilot-scale circulating fluidized bed combustor (CFBC) consisting of the riser, two hot cyclones and a loop-seal to reduce pollutant emission in exhausted flue gas. To achieve them, the effect of the oxidant variations, such as superficial velocity, equivalence ratio(ER: 1.2, 1.3, 1.4) and combustion atmosphere (air-fired and oxy-fired) was evaluated. As pollutant emissions in flue gas, SO2, NO, CO, CO2, HCl, odor contaminants and leaching behavior of heavy metals were analyzed. As a result, to stably operate combustion of pellet mixed with sewage sludge and woody biomass as alternative renewable fuel in a CFBC system, the superficial velocity in the riser had to be kept under 6 m/s and the equivalence ratio was proper around 1.3-1.4. All odor contaminants formed at these operating conditions met the domestic air pollutant standards. Heavy metals in fly ash met the environment ministry’s standard. Additionally, compared to air-firing, SO2, NO and CO as precursors of fine particles during oxy-firing were reduced by 70.8, 77.1 and 38.2%, respectively. KCI Citation Count: 0