The combustion and pollutant emission characteristics of the dried sludge in a fluidized bed combustor (FBC) were studied. The sludge reburning technology was employed for the first time in FBC. A scheme for using the dried sludge reburning blended with calcium magnesium acetate (CMA) to reduce pollutants simultaneously was also proposed, and the effect of the CMA addition was investigated. Results showed that fluidized bed reburning technology can be used to effectively treat the sewage sludge with lower calorific values. As the secondary fuel mass percentage increases, the unburned carbon content in fly ash and the CO emission increase, resulting in lower combustion efficiency. However, the de-NO ratio increases from 37.1% to 53.7%, and the de-SO₂ ratio only increased from 1.6% to 7.6% as the secondary fuel mass percentage increase from 10% of 25%. For dried sludge blended with CMA, the minimum emissions of SO₂ and NO significantly decrease to 254 mg/Nm³ and 70.9 mg/Nm³ at Ca/S ratio of 2, respectively. Results of main gaseous pollutant emissions from the sludge combustion in an FBC using different pollutant removal methods were compared under well-defined conditions. Fuel reburning blended with CMA addition has the smallest SO₂ and NO emissions.

研究了流化床燃烧器（FBC）中干燥污泥的燃烧和污染物排放特征。污泥再燃技术在FBC中首次采用。提出了将干污泥再燃与乙酸钙镁（CMA）混合同时减少污染物的方案，并研究了添加CMA的效果。结果表明，流化床再燃技术可以有效地处理低热值的污泥。随着二次燃料质量百分比的增加，粉煤灰中的未燃烧碳含量和CO排放量增加，导致燃烧效率降低。但是，de-NO比率从37.1％增加到53.7％，de-SO ₂二次燃料质量百分比从25％的10％增长到1.6％到7.6％。对于混合了CMA的干污泥，当Ca / S为2时，SO ₂和NO的最低排放量分别显着降低至254 mg / Nm ³和70.9 mg / Nm ³。在确定的条件下，比较了使用不同污染物去除方法的FBC中污泥燃烧产生的主要气态污染物排放结果。与CMA混合添加的燃料再燃烧具有最小的SO ₂和NO排放。