查詢結果分析
相關文獻
- Effect of Average Shear Rate and Impeller Type on the Floc Growth in Stirred Vessels
- 混凝-薄膜過濾系統對膠體顆粒去除效率之探討
- ⅡA與ⅢA金屬陽離子化學沉降之研究
- Factorial Design Analysis for Turbidity and Humic Acid Removal from High Turbidity Stormwater and Floc Characteristics
- 混凝系統的膠羽平衡
- 淨水廠污泥氈澄清池操作影響因子之探討
- 污泥回收製備二氧化鈦及其應用於光催化降解染料AR27之研究
- 現代混凝土與水泥問題的思考
- 複合膠凝材 提升抗氯離子滲透性
- 藻類特性及前氧化對藻類混沉及過濾移除之影響
頁籤選單縮合
題名 | Effect of Average Shear Rate and Impeller Type on the Floc Growth in Stirred Vessels=攪拌槽內剪應率與攪拌翼型式對膠羽成長之影響 |
---|---|
作者 | 莊清榮; 羅中良; Chuang, Ching-jung; Lo, Chang-liang; |
期刊 | 中原學報 |
出版日期 | 20000300 |
卷期 | 28:1 2000.03[民89.03] |
頁次 | 頁21-30 |
分類號 | 460.023 |
語文 | eng |
關鍵詞 | 混凝; 膠凝; 膠羽; 快混; 攪拌槽; Coagulation; Flocculation; Floc size; Rapid mixing; Stirred vessel; |
中文摘要 | 本研究以實驗分析攪拌混凝槽內最大膠羽粒徑之變化,多數實驗在3.86升之標準 攪拌槽配備 6 片直葉盤式或 45 °斜漿式等兩型攪拌翼進行。實驗結果顯示,10 ∼ 20 秒 之快混時間即形成最大膠羽,隨槽內平均剪應率與混凝化學條件等之改變,不同型式攪拌翼 對膠羽成長之影響有明顯差異。本文亦提出可藉由懸浮液獨度偵測來線上控制攪拌翼轉速, 以獲致較佳之膠羽成長路徑。 本研究也提出一理論模式,以關聯最大穩定膠羽粒徑與膠羽強度和攪拌翼轉速,經與文獻中 強度均一之膠羽的碎裂結果相比較,此模式之適用性獲得驗証。依據此模式與最大穩定膠羽 之實驗結果,本文亦探討了經長時間攪拌作用後之膠羽強度與攪拌翼轉速之關係。 |
英文摘要 | Variations of the maximum floc size in the rapid-mixing stages of coagulation and flocculation were analyzed to investigate the effects of average shear rate and type of impeller on floc growth in mixing tanks. Most of the experiments were carried out in a 3.86 liter standard tank with two different impellers: a six-bladed Rushton disk turbine and a 45 ° pitched-bladed turbine. Detailed floc size measurements indicated that only 10 ∼ 20s of rapid mixing is required and that the differences in performance between the two impellers depend on the average shear rate and the chemical conditions applied. It was suggested that on-line measurement of turbidity can be used to control the impeller speeds for achieving more favorable floc growth. A theoretical model for relating the maximum size of stable flocs to the impeller speed and floc strength was also presented. Positive correlation has been obtained between this model and the experimental results in literature under a condition of constant adhesive force of flocs. Based on the model and the floc size measurements, the dependence of the adhesive force of flocs after a long period of stirring on the impeller speed was also discussed. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。