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探討二階段氣化程序對廢棄物氣化效率之影響 = The effect of...

國立高雄大學土木與環境工程學系碩士班

探討二階段氣化程序對廢棄物氣化效率之影響 = The effect of two-stage gasifier procedure on efficiency of gas generation during waste gasification

紀錄類型:	書目-語言資料,印刷品 : 單行本
並列題名:	The effect of two-stage gasifier procedure on efficiency of gas generation during waste gasification
作者:	張宗仁,
其他團體作者:	國立高雄大學
出版地:	[高雄市]
出版者:	撰者;
出版年:	2014[民103]
面頁冊數:	105面圖，表 : 30公分;
標題:	二階段流體化床
標題:	two-stage gasifier
電子資源:	http://handle.ncl.edu.tw/11296/ndltd/34132071526077081816
附註:	參考書目：面84-91
附註:	103年12月16日公開
摘要註:	本研究主要探討二階段氣化程序對廢棄物氣化效率之影響，並探討在第二階段氣化爐中使用不同添加劑(氧化鈣、活性碳)時對氣化效率之影響。實驗設備為二階段流體化床氣化爐，氣化效率主要以氣體組成分佈、產氣量及產氣總熱值做為評估依據。本研究中以人工模擬廢棄物進行實驗，操作參數包括操作溫度(700℃、800℃、900℃)、當量比(Equivalence ratio，ER；0.2、0.3、0.4)、水氣與生質物比(Steam/Biomass ratio，S/B；0、0.5、1、1.5、2)。結果顯示當操作溫度提升會使產氣效率增加；而ER的提升則使產氣中CO2比例增加，並且降低產氣量及氣體總熱值；另外S/B的增加亦可提升產氣效率，但過高的S/B會降低爐體溫度造成產氣效率減低，將S/B控制在1或1.5為較佳操作參數。另外本研究探討添加劑對於二階段氣化程序產氣效率之影響，當使用氧化鈣做為第二階段氣化爐添加劑時，可減少產氣中的CO2並增加H2，主要原因在於氧化鈣會吸收CO2成為碳酸鈣，並促進水氣轉化反應進行，但當操作溫度為900℃時，氧化鈣無法有效吸收CO2，因碳酸鈣在850℃以上時會開始還原成氧化鈣；而當使用活性碳做為第二階段氣化爐添加劑時，可吸收第一階段產物中的焦油使其裂解或重組，產生更多氣體，產氣中的CH4有明顯的增加趨勢。依照本研究實驗結果，當使用氧化鈣做為添加劑時將操作條件控制為800℃、ER為0.3且S/B為1時可得最佳氣化效率；而當使用活性碳做為添加劑時，在800℃、ER為0.3且S/B為0時操作可得最佳氣化效率。 This study investigated the effect of two-stage gasifier procedure on efficiency of gas generation during waste gasification, and discussed the effect on gasification efficiency when adding different additives (calcium oxide, active carbon) in the second stage gasifier. The experiment used a two-stage fluidized bed gasifier. The gasification efficiency estimated by gas composition, gas yield and heat value of gas. The experimental parameters included operation temperature, Equivalence ratio (ER) and Steam/Biomass ratio (S/B) in the gasification procedure. The results show that increasing temperature can improve the gasification efficiency, and increasing ER promotes the rate of carbon dioxide in the syngas but decreases gas yield and heat value of gas. In addition, the increasing of S/B promotes gasification efficiency. However, higher S/B will reduce the furnace temperature and gasification efficiency. As S/B controls at 1 or 1.5, the experiment will get the better results. This study also investigated the gasification efficiency when adding additives in second-stage gasifier during two-stage gasification. Using calcium oxide as a second-stage gasifier additive can reduce the rate of carbon dioxide and increase the rate of hydrogen in the syngas. Because calcium oxide absorbes carbon dioxide, and improves the water-gas shift reaction. When the temperature is controlled at 900℃, calcium oxide doesn’t absorb carbon dioxide. Because calcium carbonate will transform into calcium oxide at 850℃. Using active carbon as a second-stage gasifier additive can absorb tar that generates at first-stage gasifier, and produce more syngas by cracking or transforming tar. The rate of methane in syngas significantly increases. According to the experimental results, controlling temperature at 800℃, ER= 0.3 and S/B= 1 has the best gasification efficiency when using calcium oxide as a second-stage gasifier additive, or controlling temperature at 800℃, ER= 0.3 and S/B= 1 when using active carbon.

探討二階段氣化程序對廢棄物氣化效率之影響 = The effect of two-stage gasifier procedure on efficiency of gas generation during waste gasification
張, 宗仁

探討二階段氣化程序對廢棄物氣化效率之影響 = The effect of two-stage gasifier procedure on efficiency of gas generation during waste gasification / 張宗仁撰 - [高雄市] : 撰者, 2014[民103]. - 105面 ; 圖，表 ; 30公分.
參考書目：面84-91103年12月16日公開.
二階段流體化床two-stage gasifier

探討二階段氣化程序對廢棄物氣化效率之影響 = The effect of two-stage gasifier procedure on efficiency of gas generation during waste gasification
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