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  • 學位論文

煙道氣溫度與CO2濃度對糖漿碳酸飽和及雜質去除之效應

Effect of CO2 concentration in flue gas and its temperature on syrup carbonation and impurities removal

指導教授 : 張國慶

摘要


摘要 學號:N9731013 論文題目:煙道氣溫度與CO2濃度對糖漿碳酸飽和雜質去除之效應 總頁數:82頁 學校名稱:國立屏東科技大學 畢業年月:2010年6月 研究生:葉錦森 系(所)別:環境工程與科學系 學位別:碩士學位 指導教授:張國慶 博士 論文摘要內容: 溫室效應導致氣候變遷與大氣溫度升高,近年來「節能減碳」成為產業界環保的新課題,因此製程中二氧化碳的排放減量技術的開發應用,成為產業界所重視的一環,作法包括製程再利用及能源使用效率提升。其中二氧化碳的再利用,必須配合水溶解後之酸性點,於鹼性工業製程,加以中和或去除,才能算是二氧化碳的再利用。本研究以台糖公司精煉糖廠為例,探討鍋爐煙道氣溫度與CO2濃度對糖漿雜質去除之影響。利用模擬煙道氣在糖漿pH值11時通入飽和反應槽內,進行碳酸飽和反應,產生碳酸鈣將糖漿雜質去除。在研究中,模擬煙道氣溫度變化及糖漿錘度變化對碳酸飽和反應效率的影響作研究探討。 為了解煙道氣溫度變化對碳酸飽和反應效率的影響,首先將二氧化碳進氣溫度設定為50℃、60℃、70℃及80℃進行實驗,採樣分析的結果顯示,在進氣溫度50℃時,糖漿的CaCO3莫爾百分率最高為99.28,當進氣溫度80℃時,糖漿的CaCO3莫爾百分率最低為96.51。將實驗數據進行現場測試,當煙道氣溫度60℃時反應最佳,A飽和槽糖漿與B飽和槽糖漿的CaCO3莫爾百分率為77.38及99.22。煙道氣溫度80℃時反應最差,A飽和槽糖漿與B飽和槽糖漿的CaCO3莫爾百分率為71.24及89.37。為進一步了解煙道氣溫度的變化對糖漿雜質去除的影響,採樣分析糖漿色值。當煙道氣溫度60℃時糖漿色值最佳為1145,煙道氣溫度80℃時糖漿色值最差為1418。 為了解糖漿錘度變化對碳酸飽和反應效率的影響,另將糖漿錘度分別設定在68 Bx°、70Bx°、72Bx°及74Bx°進行實驗,採樣分析的結果顯示,當糖漿錘度68 Bx°時反應最佳,A飽和槽糖漿與B飽和槽糖漿的CaCO3莫爾百分率分別為76.53與99.17,當糖漿錘度74Bx°時反應最差,A飽和槽糖漿與B飽和槽糖漿的CaCO3莫爾百分率分別為69.59與92.38。將結果進行現場測試,採樣分析的結果顯示,當糖漿錘度68 Bx°時反應最佳,A飽和槽與B飽和槽CaCO3的莫爾百分率分別為77.63與98.67,當糖漿錘度74Bx°時反應最差,A飽和槽糖漿與B飽和槽糖漿的CaCO3莫爾百分率分別為70.53與91.07。採樣分析糖漿色值,當糖漿錘度68 Bx°時糖漿色值最佳為973,當糖漿錘度 74Bx°時糖漿色值最差為1298。 綜合實驗結果得知隨著煙道氣溫度與糖漿錘度升高,飽和槽糖漿的CaCO3莫爾百分率及糖漿純度有下降趨勢。顯示煙道氣溫度變化及糖漿錘度變化,對碳酸飽和反應效率及糖漿雜質的去除都有顯著的影響。 關鍵字:煙道氣、二氧化碳、再利用、糖漿、碳酸

關鍵字

煙道氣 二氧化碳 再利用 糖漿 碳酸飽和

並列摘要


Abstract Student ID: N9731013 Title of Thesis: Effect of CO2 concentration in flue gas and its temperature on syrup carbonation and impurities removal Total Pages:82 Name of Institute: National Pingtung University of Science and Technology Name of Department: Department of Environmental Engineering and Science Date of Graduation: June, 2010 Name of Student : Ching-Sheng Yeh Degree Conferred: Master Adviser : Dr. Kuo-Ching Chang The Contents of Abstract in this Thesis: The greenhouse effect has caused the atmospheric temperatures increase and climate change, in these recent years “conserve energy and reduce carbon emission” has become the new environmental protection issue among the industries. Therefore, the development and application of carbon dioxide emissions reduction technologies in processes has become an urgent mission among the industries. The approach includes process reuse and the enhancement in energy efficiency. Among these processes, the reuse of carbon dioxide requires to coordinate with the acid point after water dissolution. In alkaline industrial processes, the acidity is to be neutralized or removed before it may be considered as carbon dioxide reuse. The experiment was performed in sugar refinery of Taiwan Sugar Corporation to study the influences of the boiler’s flue gas temperature and CO2 concentration on the removal of impurities in syrup. Simulated flue gas was introduced into a saturated reaction tank, with the pH value of syrup at 11, to perform carbonation reaction, and the produced calcium carbonate removed syrup impurities. In the study, the effect of simulated flue gas temperature and syrup brix changes on carbonation reaction efficiency were pursued. To understand the effect of flue gas temperature changes on carbonation reaction efficiency, the inlet temperature of carbon dioxide were initially set at 50℃, 60℃, 70℃, and 80℃ in the experiment. The result showed that when the inlet gas temperature was 50℃, the molar percentage of CaCO3 in the syrup reached the highest at 99.28. When the inlet gas temperature was 80℃, the CaCO3 molar percentage in the syrup was the lowest at 96.51. The experimental data was further conducted with field trials; when the flue gas temperature was 60℃ the best reaction condition was obtained where the CaCO3 molar percentage in the syrup for saturated tanks A and B were 77.38 and 99.22, respectively. When the flue gas temperature was 80℃, the reaction was the least favorable, resulting with the CaCO3 molar percentage in the syrup for saturated tanks A and B being 71.24 and 89.37, respectively. In order to further understand how the flue gas temperature changes affected the removal effect of syrup impurities, sample analysis was conducted for syrup color. When the flue gas temperature was 60℃, the syrup color condition was at its best at 1145IU, whereas at 80℃, the color was least favorable at 1418IU. To understand how the syrup brix changes influenced the carbonation reaction efficiency, the syrup brix were set at 68 Bx°, 70Bx°, 72Bx°, and 74Bx°, respectively to conduct another experiment series. The result showed that when the syrup Brix was 68 Bx°, the reaction was the best with CaCO3 molar percentage in the syrup being 76.53 and 99.17 for saturated tanks A and B, respectively. The reaction was the least favorable at 74Bx°, resulting with a CaCO3 molar percentage respectively of 69.59 and 92.38. The results were then conducted with field trials. The results showed that the reaction achieved the best condition at 68 Bx°, where the CaCO3 molar percentage in the syrup for saturated tanks A and B were 77.63 and 98.67, respectively. The reaction was the least favorable at 74Bx°, resulting with CaCO3 molar percentage for saturated tanks A and B being 70.53 and 91.07. Sample analysis was conducted for the syrup color. The results showed that when the syrup brix was at 68 Bx°, the syrup color was at its best at 973IU, whereas the color was least favorable for syrup brix at 74Bx°at 1298IU. In summary, when the flue gas temperature and syrup brix increased, the CaCO3 molar percentage in the saturated tank and syrup purity had a declining trend. It could be concluded that the changes of the flue gas temperature and syrup brix both had a significant effect on carbonation reaction efficiency and the removal of syrup impurities. keyworks: flue gas, CO2, reduction, syrup, carbonation

並列關鍵字

flue gas CO2 reduction syrup carbonation

參考文獻


王亞男,2009,「森林與二氧化碳減量之關係」,全球變遷通訊雜誌,第61期,第1-6頁。
張益壽,2008,廢棄物回收再利用與二氧化碳排放之關聯分析,碩士論文,國立中央大學,環境工程研究所,桃園。
鄭玟芩,2008,海洋微藻在氮源限制下固定CO2與生質潛能組成之研究,碩士論文,國立成功大學,環境工程學系,台南。
朱茂修,2007,海洋微藻在固定CO2並作為生質能源之研究,碩士論文,國立成功大學,環境工程學系,台南。
馮炳勳,2006,台灣水泥業因應二氧化碳排放減量策略之研究,博士論文,國立成功大學,資源工程研究所,台南。

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