| 研究生: |
周宜成 Chou, I-Cheng |
|---|---|
| 論文名稱: |
ABS塑膠廢棄物添加酵素及礦石粉對焚化廢氣PAHs減量之可行性探討 A study on the Feasibility of Reduced PAHs Emission in the Flue Gas of ABS Resin Waste Incineration |
| 指導教授: |
李文智
Lee, Wen-Jhy 李俊德 Li, Chun-Teh |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 環境工程學系 Department of Environmental Engineering |
| 論文出版年: | 2003 |
| 畢業學年度: | 91 |
| 語文別: | 中文 |
| 論文頁數: | 228 |
| 中文關鍵詞: | 焚化爐 、減量 、多環芳香烴 |
| 外文關鍵詞: | PAHs, incinerator, reduction |
| 相關次數: | 點閱:132 下載:4 |
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本研究是以一套固定式焚化爐進行ABS (Acrylonitrile-Butadiene- Styrene Terpolymers) 樹脂廢棄物之批次焚化實驗,分別固定第一、二燃燒室焚化溫度分別為400°C、900°C,第一、二然燒室供風量分別為900 NL/min、1,100 NL/min。藉由粒徑為2~3、0.3及<0.05cm等三種ABS進料,以及3%蛇片、3%蛇泥、3%沸石及5%、4%、3%、2%酵素等添加物比例進行批次焚燒,來瞭解天然有機酵素和天然礦石粉對焚化煙道廢氣中所含多環芳香烴化合物(Polycyclic Aromatic Hydrocarbons,簡稱PAHs)是否具有減量效果。煙道廢氣粒狀物相與氣相PAHs是以AST自動煙道道採樣器配合冷卻系統進行等速抽引採樣,在二十一種個別PAHs的分析上則以氣相層析質譜儀(GC/MS)進行定性及定量的測定。所得結論歸納如下:1.大、中、小三種不同粒徑之焚化試程,其煙道排放之總PAHs濃度分別為133、447及965 mg/Nm3;而在灰燼中總PAHs含量則分別為0.319、792及1,720 mg/g。總PAHs之排放係數分別為352、2,940及1,480 mg-PAHs/kg-ABS廢料。2.酵素依據添加量之不同可發現,焚化試程中添加越多酵素,可以獲得較佳的總PAHs減量效果,但是添加量在3%以下時,其趨勢並不明顯。3.添加不同之礦石粉發現,減量效果依序為添加3%蛇泥,再者為3%蛇片、沸石,最差者為添加酵素。4.PAH毒性(BaPeq)之探討:(1)在煙道排放與ABS粒徑相關性,大粒徑之ABS則有最佳的毒性削減率(50.6%),其餘反而增加,而增加率為中粒徑(191%)及小粒徑(220%);若只考慮煙道排放與添加物因素,添加3%蛇泥的平均削減率最高為48.6%,其次為3%蛇片之3.87 %,沸石則增加198%,最低則是酵素增加205%。(2)在底灰與ABS粒徑相關性方面,小粒徑之ABS則有最佳的毒性削減率(37.1%),其次為大粒徑(32.5%),中粒徑則增加,且增加率為41.3%;若只考慮底灰與添加物因素,添加蛇片的平均削減率最高為61.5%,其次為3%沸岩之47.0%, 3%蛇泥的43.6%,而酵素只有4.9%的削減率。5.就ABS顆粒大小而言,大、中及小粒徑之O/I ratio分別為0.00285、0.00947及0.0113,可知ABS進料之粒徑較大,能較完全破壞PAHs。
Waste Acrylonitrile-Butadiene- Styrene Terpolymers (ABS) was incinerated by a batch-type, fixed-bed and controlled-air incinerator in this study. The temperature of the primary and secondary combustion chambers was set to 400 ℃and 900 ℃, respectively, while air supply was set to 900 NL/min and 1,100 NL/min, respectively. Three different diameter of waste ABS, 2~3 cm, 0.3 cm and <0.05cm, were incinerated with adding 3%wt Marmolite, 3%wt Serpentinite, 3%wt Zeolite powder and 5%, 4%, 3%, 2%wt natural ferment to determine the reduction of PAH emissions from the stack flue gases.The stack flue gases were collected by a Graseby Andersen Automatic Stack Sampler (AST). Twenty one individual PAHs were measured by a Hewlett Packard GC/MS. The conclusions of this study are summarized as follows. 1.The total-PAH concentrations in the stack flue gases are 133, 447 and 965 mg/Nm3, respectively, when incinerating 2~3 cm, 0.3 cm and <0.05cm diameter waste ABS. The total-PAH contents in the bottom ash are 0.319, 792 and 1,720 mg/g, respectively. The emission factors of total-PAHs are 352、2,940 and 1,480 mg-PAHs/kg-ABS, respectively. 2. The more natural ferment adding, the more reduction of PAHs. But the tendency is obvious when the adding is over 3%wt. 3. The reduction of PAHs in descending order are adding Serpentine, Marmolite, Zeolite and ferment. 4. The reductions of PAH toxicity (BaPeq) in the stack flue gases were 50.6%, -191% and -220%, respectively when incinerating 2~3 cm, 0.3 cm and <0.05cm diameter waste ABS. The reductions of BaPeq in the stack flue gases were 48.6%, 3.87%, -198% and -205%, respectively when adding 3% Serpentine, marmolite, zeolite and ferment. The reductions of BaPeq in the bottom ash were 37.1%, 32.5% and -41.3%, respectively when incinerating <0.05 cm, 2~3 cm and 0.3 cm diameter waste ABS. The reductions of BaPeq in the bottom ash were 61.5%, 47.0%, 43.6% and 4.9%, respectively when adding 3% marmolite, zeolite, serpentine and ferment. 5. The O/I ratio of PAHs is 0.00285, 0.00947 and 0.0113, respectively for 2~3 cm, 0.3 cm and <0.05 cm diameter waste ABS. It revealed that incinerating large particle size of waste ABS generated less PAHs.
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