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題名 | 懸板配置對高桶式旋流漏斗排砂器排砂效率影響之試驗研究=Experimental Study on the Effect of Deflectors on Sediment Removal Efficiency of a Deep-Depth Vortex Chamber Type Sediment Extractor |
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作者 | 詹錢登; 徐郁超; 林程翰; 曾奕超; Jan, Chyan-deng; Hsu, Yu-chao; Lin, Cheng-han; Zeng, Yi-chao; |
期刊 | 農業工程學報 |
出版日期 | 20111200 |
卷期 | 57:4 2011.12[民100.12] |
頁次 | 頁84-96 |
分類號 | 443 |
語文 | chi |
關鍵詞 | 旋流排砂器; 排砂效率; 懸板; Vortex chamber; Sediment removal efficiency; Deflector; |
中文摘要 | 本研究進行水工模型試驗探討懸板配置對高桶式旋流漏斗排砂器排砂效果之影響。試驗在直徑48 cm及高度115 cm的旋流漏斗排砂器內進行,水平懸板的配置方式包括:無懸板、單一懸板、雙懸板及三懸板等四種。試驗包含清水渦流觀察試驗及渾水排砂試驗,其中渾水排砂試驗時入流渾水的含砂濃度(iC)介於35.0 g/L至45.0 g/L之間,渾水中泥砂的中值粒徑為3.69 × 10-3 mm。試驗結果顯示懸板配置有利於穩定渦流及提升排砂效果。在圓柱桶上、中、下均配置懸板(三懸板)的情況下,經過旋流排砂後,表層溢流含砂濃度(oC)約為0.37 g/L,排砂效率為98.9%。比較不同懸板配置試驗結果顯示,配置三懸板情況下的溢流含砂濃度比雙懸板情況下低約26.0%~56.0%,比單一懸板情況下低約63.0%~79.2%,比無懸板配置情況下低約78.5%。試驗結果顯示設置懸板有助於排除細顆粒泥砂,而且不同懸板配置對於排砂效果也有所不同,在本研究範圍內以圓柱桶上、中、下均配置懸板(三懸板)的情況下有較佳的排砂效果。 |
英文摘要 | This study investigates the effects of horizontal deflectors on the sediment removal efficiency of a deep-depth vortex chamber type sediment extractor. The vortex chamber used in this study has a total height of 115.0 cm and an internal diameter of 48.0 cm. The arrangement of deflectors in experiments includes no deflector, one deflector, two deflectors and three deflectors. The inflow sediment concentrations are between 35.0 g/L and 45.0 g/L. The median diameter (d50) of the sediment used in experiments is 3.69 × 10-3 mm. An experimental result shows that the deep-depth vortex chamber type sediment extractor installed with three deflectors, the overflow sediment concentration is 0.37 g/L and its corresponding sediment removal efficiency is 98.9%. Comparisons of experi-mental results under different arrangements of deflectors show that the overflow sediment concentration in experiments with three deflectors is about 26.0%~56.0% lower than that with two deflectors, 63.0%~79.2% lower than that with one deflector, and 78.5% lower than that without deflector. The experimental results indicate that the deflectors installed in the deep-depth vortex chamber type sediment extractor is helpful for removing fine sediment particles from sediment-water mixtures, and the device with three deflectors has better sediment removal efficiency. |
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