煤质技术2026，Vol.41Issue(3)：8-16,9.DOI:10.3969/j.issn.1007-7677.2026.03.02
燃煤循环流化床锅炉掺烧污泥热力特性研究
Study on thermal characteristics of co-combustion of sludge in coal-fired circulating fluidized bed boilers
摘要
Abstract
This study focuses on a case of co-firing municipal sewage sludge in a 75 t/h low-temperature,low-pres-sure coal-fired circulating fluidized bed(CFB)boiler in a heat source plant.A computation model is constructed to investigate the impact of municipal sludge co-firing on the boiler's thermal characteristics.The effects of varying sludge blending ratios(0 to 60%)and moisture contents(30%to 82.96%)on fuel properties,furnace combustion temperature,flue gas temperature at back-end heating surfaces,flue gas volume,and coal savings were analyzed.The results indicate that sludge blending significantly reduces fuel calorific value and increases moisture content.To maintain a stable furnace temperature(850～1 050℃)and avoid combustion instability,the blending ratio of high-moisture sludge(＞60%)must be strictly controlled below 50%.The flue gas temperature at back-end heating sur-faces exhibits a nonlinear variation with the blending ratio and moisture content,necessitating optimized heating sur-face design to improve thermal efficiency.Co-firing low-moisture sludge(＜50%)can theoretically increase coal sav-ings(up to 60%),but practical applications must comprehensively consider engineering constraints such as combus-tion stability,increased ash content,and pollutant emissions to ensure normal boiler operation.This study provides a theoretical basis and boundary guidelines for process optimization and engineering application of sludge co-processing in CFB boilers.关键词
燃煤循环流化床锅炉/掺烧污泥/热力特性/模拟/协同处置Key words
coal-fired circulating fluidized bed boiler/co-firing sludge/thermal characteristics/simulation/co-disposal分类
能源科技引用本文复制引用
赵静..燃煤循环流化床锅炉掺烧污泥热力特性研究[J].煤质技术,2026,41(3):8-16,9.基金项目
中煤科工清洁能源股份有限公司科技创新创业资金资助项目(CE-KY-JC-2023-04) （CE-KY-JC-2023-04）
