摘要
The effect of sulfur compounds （including sulfur, sulfide, sulfite and sulfate）, initial concentration of heavy metal and operating conditions on Cd emission in municipal solid waste （MSW） incineration were investi-gated using a simulated tubular furnace and simulated MSW spiked with Cd. The concentration of Cd was meas-ured by inductively coupled plasma-atomic emission spectrometry （ICP-AES） after digesting the samples including bottom ash, fly ash and flue gas according to related USEPA methods. The results show that S and Na2S tend to in- crease Cd partitioning in bottom ash, whereas Na2SO3 and Na2SO4 tend to reduce Cd partitioning in bottom ash. The effect of sulfur compounds on Cd partitioning in bottom ash was in the sequence of Na2S〉S〉Na2SO3〉 Na2SO4. chemical equilibrium analysis is also performed to determine the effect of sorbents on Cd adsorption. The calculations show that S presents strong affinity for Cd and restrains Cd adsorption by SiO2, whereas when temperature rises to between 830℃ and 1030℃, Cd adsorption efficiency of SiO2 is over 80% and the efficiency of Al2O3 is up to 85%.
硫混合物(包括的硫，硫化物，亚硫酸盐和硫酸盐) 的效果，重金属的起始的集中和在市政的固体的 Cd 排放上的操作条件浪费(MSW ) 焚化用一个模仿的管状的炉子被调查并且模仿了与 Cd 刺的 MSW。Cd 的集中被诱导地联合的血浆原子的排放 spectrometry (ICP-AES ) 在根据相关 USEPA 方法包括底部灰，苍蝇灰和烟道气体消化样品以后测量。结果证明 S 和 Na2S 趋于增加在底部灰划分的 Cd，而 Na2SO3 和 Na2SO4 趋于减少在底部灰划分的 Cd。在底部灰划分的 Cd 上的硫混合物的效果在 Na2 S > S > Na2SO3 > Na2SO4 的顺序。化学平衡分析也被执行在 Cd 吸附上决定吸着剂的效果。计算证明 S 为 Cd 介绍强壮的亲密关系并且，当温度升起到时，由 SiC2 制止 Cd 吸附在 830 ° C 和 1030 ° C 之间， SiO2 的 Cd 吸附效率是超过 80% ， Al2O3 的效率直到 85% 。
