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標題: | 利用超重力旋轉填充床於電子廢棄物焚化處理排氣中細懸浮微粒去除效益評估 Performance Evaluation of Fine Particle Removal from Air Emissions of the E-waste Combustion Process via a Rotating Packed Bed |
作者: | Tzu-Hao Huang 黃子郝 |
指導教授: | 蔣本基 |
關鍵字: | 細懸浮微粒,電子廢棄物焚燒,超重力旋轉填充床,空氣污染減量,生命週期評估, Fine particle,E-waste combustion,rotating packed bed (RPB),air pollution reduction,life cycle assessment (LCA), |
出版年 : | 2018 |
學位: | 碩士 |
摘要: | 本研究與優勝奈米有限公司進行合作,利用超重力旋轉床進行IC碳化製程中產生之懸浮微粒減量去除效益評估。IC碳化過程中產生大量人體有害之懸浮微粒,超重力旋轉填充床可產生大量小液滴及液膜,可增加對液滴與懸浮微粒之碰撞機率,提升對懸浮微粒之捕捉去除效率。本研究目標包含不同操作條件下對於總懸浮微粒去除效率的影響:研究不同轉速、液體流量與進口濃度對於效率的影響,同時透過反應曲面方法,找出可達之最高效率操作條件,並透過半理論公式進行去除機制分析,同時將實驗結果進行擬合,進行效率預估,最後利用生命週期評估分析整個程序對環境之衝擊。研究結果發現提高轉速和液體流量皆會對去除效率有很大的提升,提高入口濃度亦可提高效率,但在高轉速與高液體流量下影響並不明顯。利用反應曲面法將轉速與流量進行操作最佳化,在實驗設備極限中所能達到之最高效率為99.5%,對應之條件為1740 rpm、1448 ml/min。透過半理論公式進行超重力旋轉填充床之去除機制進行了解,發現填充物與液滴皆對懸浮微粒有顯著的去除效果,低轉速時以填充物去除為主,反之高轉速液滴的去除才較為重要。透過實驗數據進行數據擬合同時也得到良好的相關性進行效率預測。最後透過生命週期評估進行環境衝擊量化,發現利用超重力旋轉填充床進行懸微粒去除可有效降低環境之衝擊,最低之環境衝擊僅有未經處理的0.29倍,證明超重力旋轉填充床不只可達到良好的去除效率,同時也可降低環境衝擊,可視為環境有益之空氣污染處理技術。 This research was in cooperation with the Uwin Nanotech. Co., Ltd. The rotating packed bed (RPB) was used to enhance particle reduction from the integrated circuit (IC) carbonized process. The IC carbonized process may produce harmful particle. The RPB could create plenty of droplet and liquid film, which could enhance collision probability to obtain high particle removal efficiency. Objectives of this research include investigating the effect of operating conditions on particle removal efficiency. The operating parameters were rotating speed, liquid flow rate and particle concentration. Meanwhile the highest achievable efficiency was studied by the response surface methodology (RSM). The semi-theoretical model was used to analyze the removal mechanism inside RPB, and an empirical model was developed to predict the removal efficiency. Finally, life cycle assessment (LCA) was applied to evaluate the environment impact of RPB. Results showed that increasing in rotating speed, liquid flow rate and particle concentration could increase particle removal efficiency, but for high rotating speed and liquid flow rate, the effect of particle concentration was insignificant. By RSM method, the highest achievable efficiency within equipment limitation was determined at 99.5%, 1740 rpm rotating speed and 1448 ml/min flow rate. From semi-theoretical model, both packing zone and cavity zone was both important in the particle removal process. In lower rotating speed, the packing zone was dominated, as for high rotating speed the cavity zone became dominate. The empirical model showed good agreement between the predicted data and the experimental data, which could be used for efficiency prediction. Final, from LCA, the result showed that by using RPB for particle reduction, the minimum impact was only 0.29 times of a conventional process without RPB. Results from this study indicated that RPB could not only achieving r high removal efficiency, but also be an environment benefit air pollution control technology. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/71217 |
DOI: | 10.6342/NTU201801966 |
全文授權: | 有償授權 |
顯示於系所單位: | 環境工程學研究所 |
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