Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/5175
標題: 焚化操作條件對重金屬化合物生成之影響
INCINERATION OF FLUIDIZED BED
作者: 蘇政隆
Su, J-L
關鍵字: 流體化床;HEAVY MENTAL COMPOUNDS;重金屬;熱力平衡模式;INCINERATION OF FLUIDIZED BED;THERMODYNAMIC EQUILIBRIUM MODEL
出版社: 環境工程學系
摘要: 
焚化過程中各種污染物之控制已漸趨成熟,唯重金屬不但不被高溫分解破
壞,尚可能因不當的操作條件與進料組成等因素,受高溫揮發而隨廢氣被
釋放到大氣中或由灰渣中溶出而進入周遭環境中,危害人體健康。 文獻
中對於重金屬經焚化後是以何種化合物存在於氣相中,大多只侷限於模式
之預測,因此有關不同操作條件對重金屬化合物之生成影響實有進一步探
討之必要。本實驗擬利用一流體化床焚化爐,探討對人體危害性較大的重
金屬C、P、C在有機氯(PV、無機氯(NaC及不含氯的添加,與不同焚化溫度
情況下所可能產生之金屬化合物種,並以添加Na來探討重金屬與納離子對
氯離子之競爭力,而不同金屬物種在砂床、不同粒徑飛灰及氣相中之濃度
分佈情形亦加以分析。最後將實驗結果與在相同焚化條件下經熱力平衡模
式模擬之結果進行驗證工作,除了建立模式與實驗間之互動關係外,希望
對於發展動力模式亦可提供有用的資訊。 實驗結果顯示,當進料含有機
氯PV時,熱力平衡模式模擬與XR物種分析結果都會使重金屬鉛及鎘產生沸
點較低的金屬氯化物,其餘進料則以金屬氧化物為三種重金屬的主要生成
物種。當反應生成金屬氯化物時,會降低在砂床的吸附能力,並提高在飛
灰中的濃度。實驗結果也發現,金屬鈉對氯之鍵結能力較三種重金屬強。
關鍵詞:流體化床、重金屬、熱力平衡模式

ABSTRACTHeavy metals could not be destroyed at high temperature,
and subsequently will release to atmosphere along with flue gas
or leach to the environment from ash during the incineration
process. The incineration conditions were shown to have
significant effects on the formation of heavy metal compounds,
as illustrated from previous theoretical study. The formation of
Cr, Pb, and Cd species under various incinerating conditions in
a pilot-scale fluidized-bed incinerator were investigated in
present work. The effWhen the feedstock contains organic
chloride (PVC), the metallic chlorides of lead and cadmium were
the major species both in the thermodynamic simulation and x-ray
diffraction analysis results. The metallic chlorides will
decrease the absorption efficiency of heavy metal in sand bed
and increase the concentration in fly ash. When the feedstock
contains the other materials, metallic oxides were the major
species of the three metals, and the affinity of sodium for
chlorine is higher than the three heavy metaKeywords: Heavy
metal compounds, incineration, fluidized-bed, thermodynamic
equilibrium model
URI: http://hdl.handle.net/11455/5175
Appears in Collections:環境工程學系所

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