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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 呂理平 | |
dc.contributor.author | Chih-Ching Young | en |
dc.contributor.author | 楊志清 | zh_TW |
dc.date.accessioned | 2021-06-13T06:56:09Z | - |
dc.date.available | 2010-08-01 | |
dc.date.copyright | 2005-08-01 | |
dc.date.issued | 2005 | |
dc.date.submitted | 2005-07-28 | |
dc.identifier.citation | Arena, U., A. Cammarota and M. L. Mastellone, 'The Influence of Operating Parameters on The Behavior of A Small Diameter L-valve', in Fluidization IX, L. S. Fan and T. M. Knowlton (Eds.), pp. 365-372, Engineering Foundation, New York (1998a).
Arena, U., C. B. Langeli and A. Cammarota, 'L-valve Behaviour With Solid of Different Size and Density', Powder Technol., 98, 231-240 (1998b). Daous, M. A. and A. A. Al-Zahrani, 'Modeling Solids and Gas Flow Through an L-valve', Powder Technol., 99, 86-89 (1998). Geldart, D., 'Types of Gas Fluidization', Powder Technol., 7, 285-292 (1973). Geldart, D. and P. Jones, 'The Behaviour of L-valves With Granular Powders', Powder Technol., 67, 163-174 (1991). Karri, S. B. R. and T. M. Knowlton, 'Comparison of Group A and Group B Solids Flow in Underflow Standpipes', in Fluidization VII, O. E. Potter and D. J. Nicklin (Eds.), pp. 345-352, Engineering Foundation, New York (1992). Knowlton, T. M., 'Nonmechanical Solids Feed and Recycle Devices For Circulating Fluidized Beds', in Circulating Fluidized Bed Technology II, P. Basu and J. F. Large (Eds.), pp. 31-41, Pergamon, Oxford (1988). Knowlton, T. M., 'Standpipes and Return Systems', in Circulating Fluidized Beds, J. Grace, A. A. Avidan and T. M. Knowlton (Eds.), Chap. 7, pp. 214-260, Blackie Academic and Professional, London (1997). Knowlton, T. M. and I. Hirsan, 'L-valves Characterized for Solids Flow', Hydrocarbon Proc., 57, 149-156 (1978). Knowlton, T. M., “Solid Transfer in Fluidized Systems”, in Gas Fluidization Technology, D. Geldart (Eds.), Chap. 12, pp. 341-414, Wiley, New York (1986). Knowlton, T. M., “Standpipes and Nonmechanical valves”, in Handbook of Fluidization and Fluid-Particle systems, W. C. Yang (Eds.), Chap. 21, pp. 571-597, Marcel Dekker, New York (2003). Kunii, D. and O. Levenspiel, 'Fluidization Engineering', Butterworth - Heinemann, Boston, MA, USA (1991). Leung, L. S. and P. J. Hones, 'Flow of Gas-Solid Mixtures in Standpipes. A Review.', Powder Technol., 20, 145-160 (1978). Loung, P. H. and S. C. Bhattacharya, 'A Study of Solid Circulation Rate in A Circulating Fluidized Bed', Int. J. Energy Research, 17, 479-490 (1993). Molodtsof, Y., A. Ould-Dris and J. F. Large, 'A Classification and Design Method For Moving Bed Flow in Pipes', Powder Technol., 87, 49-57 (1996). Ozawa, M., S. Tobita, T. Mii, Y. Tomoyasu, T. Takebayashi and K. Suzuki, 'Flow Pattern and Flow Behavior of Solid Particles in L-valve', in Circulating Fluidized Bed Technology III, P. Basu, M. Horio and M. Hasatani (Eds.), pp. 615-620, Pergamon, Oxford (1991). Petter, O. E. and M. Simpson, 'L-valves in A Multi-Stage Gas-Solids Countercurrent Fluidized Bed System', in Fluidization IX, L. S. Fan and T. M. Knowlton (Eds.), pp. 373-380, Engineering Foundation, New York (1998). Rhodes, M. and H. Cheng, 'Operation of An L-valve in A Circulating Fluidized Bed of Fine Solids', in Circulating Fluidized Bed Technology IV, A. A. Avidan (Eds.), pp. 240-245, AIChE, New York (1993). Rudolph, V., Y. O. Chong and D. J. Nicklin, 'Standpipe Modelling for Circulating Fluidized Beds', in Circulating Fluidized Bed Technologh III, P. Basu, M. Horio and M. Hasatani (Eds.), pp. 49-64, Pergamon, Oxford (1991). Smolders, K. and J. Baeyens, 'The Operation of L-valves to Control Standpipe Flow', Advanced Powder Technol., 6 (3), 163-176 (1995). Tong, H., H. Li, X. Lu and Q. Zheng, 'Hydrodynamic Modeling of The L-valve', Powder Technol., 129, 8-14 (2003). Yang, W. C. and T. M. Knowlton, 'L-valve Equations', Powder Technol., 77, 49-54 (1993). Zheng, Y. Q., Z. W. Ma and A. B. Wang, 'Experimental Study of The Flow Pattern and Flow Behaviour of Gas-Solid Two Phase Flow in L-valve', in Circulating Fluidized Bed Technology IV, A. A. Avidan (Eds.), pp. 246-252, AIChE, New York (1993). 胡慶元, 景山, 王金福, 金涌, 'L閥在氣力輸送中的應用', 化學反應工程與工藝, 17, 3, 244-248 (2001). 黃文迪, 許國良, 李宏順, 康忠新, 'L閥控制物料循環的數學模型及其應用', 華中理工大學學報, 23, 4, 100-104 (1995). 蕭世梁, 'B類粒子於快速流體化床中之軸向空隙度分布', 化工系碩士論文, 國立台灣大學, 台北, 台灣 (1993). 陳成慶, 呂維明, 呂理平, '單元操作實驗' (第四版), 文京圖書有限公司, 台北, 台灣 (1984). | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/35511 | - |
dc.description.abstract | 本實驗採用內徑 80mm 之壓克力圓管,製成水平長度為 380 mm 之 L-valve 。而下降管長度為 1760mm。 所使用之固體粒子為平均粒徑 193.5µm ( B 類 ),及用平均粒徑 936.5 µm ( D類 ),兩者密度均為 2635kg/m3的砂。以測量固體流量及壓力擾動訊號,來探討不同上升床速、通氣位置、通氣方向和不同成分比例混合對 L-valve 性能之影響。 實驗結果顯示,不同通氣方向對於固體流量的差異僅在較低通氣位置會有影響。若在高位置通氣時, L-valve 水平段所測得壓力在高通氣量時,壓力值會趨於定值 (12500 Pa),此時已達 L-valve 水平段所能承受之最大壓力值,固體流量將不再增加。由混合不同比例的 B 類與 D 類粒子可以發現,對使用 D 類粒子而言,若增加 B 類粒子的比例可以降低 L-valve 所需之門檻通氣量,使 L-valve 能在較低通氣量時即可操作;對使用 B 類粒子而言,若增加 D 類粒子時,因為下降管會發生有渠道效應,因此在高通氣量時不易產生大型氣泡與駐塞,而固體流量會因為 D 類粒子的增加而減少。 | zh_TW |
dc.description.abstract | The experimental apparatus consist of L-valve and downcomer, which is made by the transparent Plexiglas columns, 80 mm i.d. The B group sand particles with mean particle size 193.5µm was used in the experiment. The D group sand particles with mean particle size 936.5 µm was used in the experiment. The density of B and D group solid were both 2635kg/m3. The influence of the riser velocity, aeration tap location, aeration direction and components were determined by the measurement of solid flow rate and pressure fluctuations at various pressure probes. The results show that the solid flow rate of L-valve in different aeration direction had differences in lower aeration tap location only. The pressure of the horizontal section of L-valve was constant in high aeration. At the time, it had reached the largest pressure (12500 Pa) that the horizontal section of L-valve could support, and the solid flow rate would not increase any more. By mixing different proportion of B group and D group solid, we can discover that if we increase the proportion of B group for using D group solid, we could decrease the threshold aeration of L-valve, and the L-valve could be operated in lower aeration. Because of the channel effect, there would have the difficulty to occur large bubbles and slugging in the downcomer if we increase D group solid for using B group solid. But the solid flow rate will decrease because of increasing D group solid. | en |
dc.description.provenance | Made available in DSpace on 2021-06-13T06:56:09Z (GMT). No. of bitstreams: 1 ntu-94-R92524071-1.pdf: 1158328 bytes, checksum: daa947fc8ebd5ffbf21d16414c745db9 (MD5) Previous issue date: 2005 | en |
dc.description.tableofcontents | 中文摘要
英文摘要 Ⅱ 目錄 Ⅲ 圖表索引 V 第一章 緒論 1 第二章 文獻回顧 5 2-1. 關於 L-valve 5 2-2. L-valve 之操作變數 12 2-3. 關於通氣位置 15 2-4. 關於固體流量 19 第三章 實驗裝置與步驟 23 3-1. 實驗裝置 23 3-2. 粒子性質 31 3-3. 固體流量的測量與控制 31 3-4. 實驗步驟 27 3-4.1. 改變通氣位置 (氣體分別與粒子流經 L-valve 之方 34 向 1.平行 2.垂直 3.相反) 3-5. 數據分析 36 第四章 結果與討論 37 4-1. 不同通氣方向對 L-valve 的影響 37 4-1.1. 不同通氣方向與通氣高度對固體流量之影響 37 4-1.2. 不同通氣方向與通氣高度對水平段壓力值之關係 49 4-1.3. 不同通氣方向差異的原因 52 4-2. L-valve 肘部壓力值大小與流態之探討 62 4-2.1. 不同通氣方向對於 L-valve 肘部壓力值的影響 62 4-2.2. L-valve 肘部流態對壓力值差異的影響 65 4-3. 雙成分混合不同粒徑大小對 L-valve 的影響 70 4-3.1. 不同混合比例對固體流量之影響 73 4-3.2. 不同通氣高度對門檻通氣量的影響 75 4-3.3. 不同混合比例對固體流量的差異之結果與討論 77 第五章 結論 84 第六章 符號說明 86 第七章 參考文獻 88 附錄一 上升床流速之計算 92 附錄二. 水平段最大壓力值計算 93 | |
dc.language.iso | zh-TW | |
dc.title | L-valve之壓力擾動分析 | zh_TW |
dc.type | Thesis | |
dc.date.schoolyear | 93-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 施信民,王榮基 | |
dc.subject.keyword | 循環流體化床, | zh_TW |
dc.subject.keyword | L-valve, | en |
dc.relation.page | 95 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2005-07-28 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 化學工程學研究所 | zh_TW |
顯示於系所單位: | 化學工程學系 |
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