跳到主要內容

臺灣博碩士論文加值系統

(3.236.68.118) 您好!臺灣時間:2021/07/31 19:31
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果 :::

詳目顯示

我願授權國圖
: 
twitterline
研究生:林政鍠
研究生(外文):Chen-Huang Lin
論文名稱:流動式顆粒床過濾器之流場型態設計與研究
論文名稱(外文):The research of granular bed filters
指導教授:蕭述三蕭述三引用關係
指導教授(外文):Shu-san Hsiau
學位類別:碩士
校院名稱:國立中央大學
系所名稱:機械工程研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2004
畢業學年度:92
語文別:中文
論文頁數:83
中文關鍵詞:流動式顆粒床過濾器滯流區流動校正單元
外文關鍵詞:granular bed filtersstagnant zonesinternal insert
相關次數:
  • 被引用被引用:1
  • 點閱點閱:123
  • 評分評分:
  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
近年來歐美日大力發展生質能氣化發電系統與先進燃煤發電系統,這些系統均會產生高溫高壓之氣體,在進入氣渦輪機前必須有效除塵,方能使系統有效運作。以顆粒床過濾器淨化高溫氣體一直存在著濾材滯流區形成,而造成系統堵塞之問題。
我們已成功發展流動校正單元,將其嵌入顆粒床,可有效克服此問題,本研究將持續過去成果,繼續進行相關技術的開發工作,並將重點列為發展不同型式之流動校正單元,探討其可行性與優劣點。最終結果將提供為製作顆粒床過濾器之熱模系統,進行高溫測試。
Successful commercialization of advanced coal-based power generation technologies will require highly efficient removal of ash particles from gas streams at elevated temperatures and pressures. Particulate loading must be maintained at very low levels (e.g., smaller than 20 ppmw), and the concentration of large particles (greater than 5 μm) must be minimized to ensure the reliable operation of downstream combustion turbines in these environments. Previous studies have suggested that the ceramic and metallic candle filters can be used to meet these ambitious goals, but problems remain with the reliability of filter elements, failsafes, and sealing systems. For these reasons, alternative means of particulate removal, such as granular bed filters, especially moving bed filters continue to be developed. However, such equipment has hitherto met with problem of stagnant zones in moving bed. An internal insert can be used to prevent forming of stagnant zones and to widen the central flowing core of the filter moving bed.

This paper presents the results of a study of the flow patterns in a 2-D cross-flow moving granular bed with three different systems of internal inserts in louvered wall granular moving bed and with system without internal inserts but with curved louvers. In experiments we chose 2-4 mm quartz sand as the granular media. The flow patterns of granular media in the systems with and without inserts were studied experimentally. The optimal placement of inserts was demonstrated to efficiently diminish the stagnant zones near the louvers.
摘要 I
Abstract II

目錄 III
圖目錄 VI
表目錄 IX

第一章 前言 1
1.1 研究背景 1
1.2 研究目的 6

第二章 實驗模擬系統與設備 10
2.1 濾材流動性質量測與討論 10
2.2 二維實驗模擬系統 11
2.2.1實驗A:對稱型葉片與分離式流動校正單元之顆粒床過濾器 13
2.2.2 實驗B:對稱型葉片與垂直式流動校正單元之顆粒床過濾器 16
2.2.3 實驗C:對稱型曲面式葉片之顆粒床過濾器 19
2.2.4 實驗D:不對稱型葉片與不對稱型流動校正單元之過濾顆粒床 22
2.3 二維流動實驗觀測設備 27

第三章 研究方法與實驗步驟 28
3.1 二維流場型態實驗操作過程 28
3.1.1 放置流動校正單元 28
3.1.2 控制質量流率 28
3.1.3 置入追蹤粒子 28
3.1.4 攝影記錄 29
3.1.5 後續影像處理 30
3.1.6 殘留面積百分比 30
3.2 二維流場速度分析實驗操作過程 31
3.2.1置入追蹤粒子 31
3.2.2 攝影記錄 31
3.2.3 速度向量之計算 31
3.2.4 速度分佈 33

第四章 實驗結果與討論 34
4.1對稱型葉片與分離式流動校正單元 34
4.1.1 二維流場影像圖 34
4.1.2 實驗A終止後的滯留區域 42
4.2 對稱型葉片與垂直式流動校正單元 43
4.2.1 二維流場影像圖 43
4.2.2 實驗B終止後的滯留區域 50
4.3對稱型曲面式葉片 51
4.3.1 二維流場影像圖 51
4.3.2 實驗C終止後的滯留區域 57
4.4 不對稱型葉片與不對稱型流動校正單元 58
4.4.1 二維流場影像圖 58
4.4.2 實驗D終止後的滯留區域 65
4.4.3 二維流場速度向量分析 66
第五章 結論 74

參考文獻 76
Addendum 78
1.Cicero, D. C., Dennis, R. A., Geiling D. W. and Schmidt, D. K., 1994, “Hot-Gas Cleanup for Coal-Based Gas Turbines,” ASME Mechanical Engineering, pp. 70-75.
2.Zevenhoven, C. A. P., Andries, K. R. G., Hein, K. R. G. and Scarlett, B, 1993, “High Temperature Gas Cleaning for PFBC Using a Moving Granular Bed Filter,” in Gas Cleaning at High Temperatures, edited by R. Clift and J. P. K. Seville, Blackie Academic & Professional, pp. 400-418.
3.Andries, J., Scarlett, B., Bernard, J. G., Zevenhoven, C. A. P., van de Leur, R. H. M., Ennis, B., de Hann, P. H., Hogervorst, A. C. R., and Nikolic, M., 1987, “Closed loop controlled integrated hot gas clean up,” Final Report EC Contract EN3F-0028-NL(GDF), Delft University of Technology.
4.Ishikawa, K., Kawamata N. and Kamei K., 1993, “Development of a Simultaneous Sulfur and Dust Removel Process for IGCC Power Generation System,” in Gas Cleaning at High Temperatures, edited by R. Clift and J.P.K. Seville, Blackie Academic & Professional, pp. 419-435.
5.Doyle, III, F. J., Jackson, R., and Ginestra, J. G., 1986, “The Phenomena of Pinning in an Annular Moving Bed Reactor with Crossflow of Gas,” Chemical Engineering Science, Vol. 41, No. 6, pp. 1485-1495.
6.Tsubaki, J. and Chi T., 1988, “Gas Filtration in Granular Moving Beds - An Experimental Study,” Canadian J. of Chemical Engineering, Vol. 66, pp. 271-275.
7.Macias-Machin, A., Cuellar, J., Estevez, A. and Jaraiz, E., 1992, “Simple Design of a Crossflow Moving Bed Heat Exchanger-Filter,” Filtration & Separation, March/April, pp. 155-161.
8.Song, X., Wang, Z., Jin Y. and Gong M., 1993, “Investigations on Hydrodynamics of Radial Flow Moving Bed Reactors,” Chemical Engineering Technology, Vol. 16, pp. 383-388.
9.Ghadiri, M., Seville, J. P. K. and Clift, R., 1993, “Fluidised Bed Filtration of Gases at High Temperatures,” Trans. ICHemE, Vol. 71, Part A, pp. 371-381.
10.Newton, R.H., Dunham, G.S., and Simpson, T. P., 1945, “The TCC Catalytic Cracking Process for Motor Gasoline Production ,” Trans.A.I.ChE., Vol. 41, pp. 215-218.
11.Morse, H. H., 1951. Patent, U. S. 2,255,052, Method of Effecting Contact in a Pebble Heater.
12.Johanson, J. R., 1966, “The Use of Flow Corrective Inserts in Bins,” Trans.ASME J.Eng.Ind., Vol. 88, pp. 224-230.
13.Johanson, J. R., and Kleysteuber, W. K., 1966, “Flow Corrective Inserts in Bins,” Chem.Eng.Prog., Vol. 62, No. 11, pp. 79-83.
14.Johanson, J. R., 1967/68, “The Placement of Insert to Correct Flow Problems,” Powder Technol., Vol. 1, pp. 328-333.
15.王正炎,1998,氣體淨化系統流動式顆粒床流場之實驗分析,國立中央大學機械工程學系。
16.蔡富豪,1997,流動式顆粒床內之顆粒流場分析,國立中央大學機械工程學系。
17.古政芳,2000,流動式顆粒床過濾器阻礙物配置之設計,國立中央大學機械工程學系。
18.杜威達,2003,「二維流動式顆粒床過濾器內部配置設計研究」, 國立中央大學機械工程研究所.
19.J. Smid, S. S. Hsiau, C. Y. Peng, H. T. Lee, C. H. Tai, Y. S. Chen, W. D. Tu, H. C. Lai, and C. H. Lin, 2002, “Granular Moving Bed Filters and Absorbers (GM-BF/A),” Research Report, ITRI, NCU, pp. 17-96.
20.Jenike Shear Tester, Model FT-5STEH. Jenike Shear Tester & Consolidating Bench Operating Instructions. Revised, January 1998. Jenike & Johanson, inc., One Technology Park Drive, Westford, MA, USA.
21.馬家駒, 2002,流動式顆粒床過濾器冷性能測試,國立中央大學機械工程研究所。p. 42.
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top