本研究針對南部某座都市廢棄物焚化廠之底渣、污防前、原灰及煙囪進行戴奧辛之採樣與分析,並探討底渣、污防前、原灰、煙囪以及飛灰之戴奧辛相性分佈。焚化爐戴奧辛固相濃度中,污防前固相濃度為8.568±3.059 ng/g、原灰固相濃度為51.298 ng/g,污防前濃度與原灰濃度相差約6倍。乾、濕季煙囪總量濃度,因提高活性碳噴注量,使戴奧辛濃度上升,濃度相差約5倍,結果顯示多添加近1.5倍含量之活性碳於系統中不但對煙道PCDD/Fs無抑制效果,反而對戴奧辛具再合成效應。以焚化廠原灰添加活性碳在實驗室中焙燒模擬袋式集塵器溫度環境。結果顯示在200℃反應時間為1小時經焙燒處理後,氣、固相PCDD/Fs、PCBs濃度相差約兩倍。
This study focused on the phases distribution of dioxin in the bottom slag, in front of the air pollution control devices,filter cake ash and stack of a municipal waste incineration plant.The concentrations of dioxin were investigated in the residual phase.The residual phase concentration in front of the pollution prevention dioxin is 8.568±3.059 ng/g, and the residual phase concentration of the filter cake ash dioxin is 51.298 ng/g.The concentration of dioxin in front of the pollution devices is six times more than the concentration in the filter cake ash.With respect to the dry and wet seasons,after particulate carbon injection caused the concentration of dioxin to rise up by 5 times.The results show that adding nearly 1.5 times the amount of particulate carbon injection to the system not only has no inhibition effect on the stack PCDD/Fs,but has a de novo synthesis effect on dioxin formation.Using a laboratory scale packed bed thermal reaction system treated the filter cake ash from the municipal waste incineration by added with powdered activated carbon to simulate the environment of baghouse. The results show that the concentrations of gas,residual phase PCDD/Fs and PCBs of the sample with 0.2g powdered activated carbon are reduced by half after torrefaction reprocess at 200℃ for 1 hour.