頁籤選單縮合
題名 | 協和電廠靜電集塵器性能研究(一號機)=A Study on Improving the EP's Performance for Unit No.1 of Hsieh-ho Power Station |
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作者 | 黃榮芳; 謝閔凱; 王安邦; 林恆生; 張兆良; 翁毓禧; 李國楨; | 書刊名 | 台電工程月刊 |
卷期 | 613 1999.09[民88.09] |
頁次 | 頁1-13 |
分類號 | 448.14 |
關鍵詞 | 煙道流場; 彎角導葉片; 現場診測; Duct flow; Guided vanes; Field diagnostics; |
語文 | 中文(Chinese) |
中文摘要 | 協和火力發電廠的一號機偶而存在有黑煙過多的問題,經電廠與 研究所相關同仁多方討論後,決定在眾多的可能性當中,先選取電子 集塵器入口前之管道流場與質點負載等之恰當性來診測。若能由此處 檢測,則較易研判究竟是上、中、下游的那一環節出了問題。本研究 依據規範之需求,進行(1)現場診測、(2)實驗模擬探討、(3)計算 模擬研究等三個方向的工作。本文僅討論前兩項之部份結果。 由自行設計與製作的雙向速度探針、質點抽取器、溫度計等使用 於現場診測的結果,獲知幾個事實:(1)溫度場分佈頗為均勻,最大 不均勻度不超過3℃;(2)一號與二號煙道在彎角後進入靜電集塵器的 擴散器之前的速度分佈均有內測高速而外側低速的明顯偏差;(3)一 號與二號煙道具有同等的氣流量,但是二號煙道比一號煙道多攜帶約 30%的飛灰量;(4)在堙道中的飛灰量分佈並無極為嚴重的不均勻性。 由實驗室中以16:1的模型實驗結果獲知:(1)Lurgi A.G. 原廠 的煙道彎角處的導葉片設計極為適當,在彎角之後可獲得極為均勻的 流場分佈;(2)模擬現場的裝置,在煙道外側的導葉片上加上橫隔條 後,速度分佈呈現明顯的內側高速外側低速的偏差。另外,本研究亦 經由實驗其它種導葉片的模型,歸納出寬、窄兩套導葉片的設計方法, 並歸納出具有導葉片的管道彎角之後的速度分佈的調整方法,因篇幅 關係,不在此訴及。 由現場診測與實驗模擬的結果,本文得以做出數點簡潔的結論與 建議。 |
英文摘要 | Over dispersing oil ashes into the air occasionally has been a problem to Hsieh-ho Power Station. After some internal discussions, Taiwan Power Company decided to conduct a study focused on investigating the gas flow and the ash flow distributed in the ducts of boiler and EPs. According to the specifications set by the PRI, this study consists of three parts:(1)field tests of flow, temperature, and particle distributions, (2) experimental modeling, and (3)computational modeling. In the field test, with home-made bi-directional pilot tube, particle sampling probe, and temperature probe, the flowm, temperature, and particle distributions were measured and analyzed. The field diagnostics reveal few facts. (1)Temperature distribution is quite uniform. The deviation from the average of 160 ℃ is only 3 ℃. (2)Velocity in the inner part of the cross section of the duct is larger than that in the outer part before the flow is directed into EP. (3)The number 1 and number 2 ducts possess same gas flow rates. However, the particle loading in duct 2 is 30% more than that in duct 1. (4)Particle distributions in the ducts before transferred into the EPs are not seriously non-uniform. The experimental study in the laboratory with 16:1 models of ducts showed several results. (1)Guided vanes installed in the turning angle are proper. The uniform velocity distributions are obtained immediately behind the turns. (2)Some cross blockage bars installed in the outer half of the guided vanes were found when the field test was undergoing. The cross blockage bars make the flow distributions distort both in the field test and the laboratory modeling. (3)Two design methods of the guided vanes were developed in this study. With the results obtained from the field diagnostics and laboratory experiments, concise conclusions and suggestions are numerated. |
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