生活垃圾衍生燃料中氯、硫的逸出与固化研究

Study on the Solidification of Chlorine and Sulfur in Refuse Derived Fuel

城市生活垃圾在焚烧过程中处置不当可能会释放出有害气体对环境造成污染,为了认识有害气体的逸出特点与处置方法,作者采用红外和质谱分析技术对由城市生活垃圾制备的垃圾衍生燃料（RDF）中HCl和SO_2在不同升温速率、不同气氛条件下的热解逸出特性以及氧化钙（CaO）对氯、硫的固化效果进行了实验研究。结果表明,提高升温速率导致RDF中HCl和SO_2逸出时的温度提高;空气气氛下,RDF中HCl的逸出温度比氮气气氛低;SO_2则在前期逸出温度高,后期比氮气气氛低。CaO对RDF中氯、硫的固化效果与Ca/（S＋1/2Cl）摩尔比有关,当Ca/（S＋1/2Cl）摩尔比控制在2~3时,CaO对氯和硫的固化效果最佳。

Harmful gases will be released to pollute the environment during the incineration progress of Municipal solid waste（MSW）. In order to explore the escape pyrolysis characteristics of harmful gases and disposal methods, the MS and FTIR analysis methods were used to investigate the escape pyrolysis characteristics of HC1 and SO2 in the MSW under the different conditions of heating rates and atmosphere, including the solidification effect of chlorine and sulfur in the calcium oxide （CaO） . The experimental results show that improving heating rate can increase the escaping temperature o（ Hci and SO2; the escaping temperature of HC1 is lower in the air atmosphere compared to nitrogen atmosphere. The escaping temperature of SO2 is higher at earlier stage but lower at later stage in the air atmosphere than that in the nitrogen atmos- phere. The solidification effect is associated with the Ca / （S ＋ 1 / 2C1） molar ratio, when the molar ratio of Ca / （S ＋ 1 / 2C1） is from 2 to 3, the solidification effect is optimal.