城市固体废弃物与煤循环流化床混燃过程中N_2O排放的实验研究

EXPERIMENTAL STUDY ON N_2O EMISSION OF Co-COMBUSTION OF MUNICIPAL SOLID WASTES AND COAL IN CIRCULATING FLUIDIZED BED

针对我国城市固体废弃物特性 ,在循环流化床装置上进行了城市固体废弃物与煤混燃实验 ,研究了在混燃过程中城市固体废弃物与煤掺烧比例 (R)及床层温度变化对N2 O排放浓度的影响。实验结果显示 ,当开始加入垃圾时 ,N2 O排放浓度迅速降低 ,随着掺烧比例的增加 ,其排放浓度不仅不进一步降低反而略有升高 ;当城市固体废弃物与煤掺烧比例R恒定时 ,随床温的增加 ,N2 O排放浓度呈下降趋势。

Combustion tests of MSW and coal were performed in a 0.2 MWth circulating fluidized bed (CFB).The impacts of the ratio of MSW to coal and bed temperature on the emission of nitrous oxide were investigated.The result showed that the N 2O emissions decresed rapidly when MSW were fed into the CFB.With the amount of MSW added,the N 2O emissions increased slightly.When the mixing ration was constant,the N 2O emission decreased with the temperature increasing.