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題名 | 煙道排氣中餘熱結合CO₂對底渣異味削減效能之評估=A Combined of Emission Heat and CO₂for Odour Elimination of Bottom Ash in Incinerator Flue |
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作者 | 林奇剛; 秦孝偉; 凌永健; 楊廖陞; 陳翊君; 田辰彥; Lin, Chi-kang; Ching, Shiao-wei; Ling, Yong-jian; Yang, Liao-sheng; Chen, Yi-jyun; Tian, Chen-yan; |
期刊 | 東南學報 |
出版日期 | 20100700 |
卷期 | 35 2010.07[民99.07] |
頁次 | 頁139-148 |
分類號 | 445.545 |
語文 | chi |
關鍵詞 | 焚化底渣; 異味去除; 電子鼻; 餘熱; 碳化; Bottom ash; Odor elimination; Electronic nose; Emission heat; Carbonation; |
中文摘要 | 摘 要 垃圾焚化後底渣仍有強烈的異味,此對環境生態有明顯衝擊。因此,本研究利用 焚化廠焚化後餘熱導回再次處理底渣,進行熱脫附使其內部造成異味的有機物給予去 除。本研究的試驗設計利用煙道排氣中餘熱結合CO2,期能將底渣內部金屬氧化物因 碳化作用(carbonation)轉化成碳酸鹽類,將使造成異味的有機物被包覆而導致異味不易 逸散至外部。為確認底渣異味削減成效,於反應前後分別利用電子鼻(Electronic nose) 與氣相層析質譜儀(GC-MS)測定氣味強度及其成分之變化。 試驗結果發現,底渣導入CO2反應後,其異味經過削減後氣味強度具規則性低 減。模擬脫附溫度調控於150℃,反應經150min 後底渣氣味強度可降至56左右。若將 溫度調高至200℃時,更可使底渣氣味強度降至35左右,其底渣異味削減效果較溫度 150℃時之效果更明顯。不受空氣流量的影響,反應溫度200℃時底渣異味削減效果最 佳。當空氣流量提高至3 L/in 以上,因底渣發生部分翻動而排擠有機性氣體導致底渣異 味逸散至底渣外,可提升其與餘熱及CO2反應之機會。此與未利用空氣擾動試驗的結 果比較,發現當空氣流量1.0 L/min、反應經120min 後,利用空氣擾動及未利用空氣擾 動的底渣之異味削減量分別為600左右及700左右,但提高氣體流量後,其異味削減可 由600提高至740左右。 試驗中經GC-MS 分析後發現,底渣反應後所含異味氣體成分分別含有酮類、醇 類、苯類、烷類及其他成分。其中,相較於反應前,反應後之丙酮、2-丁醇、三氯甲 烷、三氯乙烯及甲基異丁烯等五種低毒害性氣體之濃度,不但未削減且有反增之趨 勢,而其他氣體削減現象相當明顯。未來,在資源化廠於貯存底渣、前處理操作的過程上,對於周遭環境衝擊具有實質參考的價值。 |
英文摘要 | ABSTRACT The characteristics of degradation/conversion of refractory are investigated in laboratory-scale emission heat and CO2 processes treating bottom ash odor which contains cancinogenic compounds. To confirm the odor elimination effectiveness of bottom ash, the changes of odor intensity in bottom ash odor and its components were monitored with electronic nose and gas chromatography mass spectrometry. After carbonation of 150 minutes treatment, odor intensity of bottom ash decreased apparently from 500 to 65, approximately. However, the change of component of odor in bottom ash was inconspicuous. The optimal flow rate of CO2 was controlled at 0.1 NL/min. It is revealed that some of cancinogenic compounds such as ketones, alcohols, benzene, alkanes were detected in pre-reaction, and the concentration of cancinogenic compounds were decreased apparently after emitting heat and CO2. It can be estimated that the enhanced odor elimination efficiency of bottom ash was not only due to the increase in heat-desorption odor removal, but also due to the role of the external metal-oxide into carbonate. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。