| 碳酸钙在铜基加热表面上结垢诱导期的研究 |
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| 引用本文： | 刘天庆 王兴海. 碳酸钙在铜基加热表面上结垢诱导期的研究[J]. 大连理工大学学报, 1999, 39(3): 400-404 |
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| 作者姓名： | 刘天庆 王兴海 |
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| 作者单位： | [1]大连理工大学化学工程研究所 [2]清华大学核能研究所 |
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| 摘 要： | 采用显微镜摄像法对铜基加热表面上ＣａＣＯ３成垢诱导期进行了实验研究，结果表明，ＣａＣＯ３的核化速率和垢粒生长大速率的随壁面温度及成垢物质浓度的升高而增大，而化学镀镍－磷－聚四氟乙烯表面材料上的实验表明，不仅ＣａＣＯ３的成核速率降低，而且此表面上一定尺寸的污垢颗粒在剪切力作用下易于脱落，这表明表面材料特性是影响污垢诱导期的重要因素之一。
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| 关 键 词： | 诱导期 成核 污垢 表面材料 碳酸钙 铜基 |
Fouling induction period of CaCO 3 on heated surface |
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| LIU Tian qing , WANG Xing hai .Res. Inst. of Chem. Eng.,Dalian Univ. of Technol.,Dalian ,China, . Res. Inst. of Nuc. Energy,Qinghua Univ.,Beijing ,China. Fouling induction period of CaCO 3 on heated surface[J]. Journal of Dalian University of Technology, 1999, 39(3): 400-404 |
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| Authors: | LIU Tian qing WANG Xing hai .Res. Inst. of Chem. Eng. Dalian Univ. of Technol. Dalian China . Res. Inst. of Nuc. Energy Qinghua Univ. Beijing China |
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| Affiliation: | LIU Tian qing 1, WANG Xing hai 2 1.Res. Inst. of Chem. Eng.,Dalian Univ. of Technol.,Dalian 116012,China, 2. Res. Inst. of Nuc. Energy,Qinghua Univ.,Beijing 100084,China |
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| Abstract: | Fouling induction period of CaCO 3 on heated surface was studied with the micro video technology. The rates of nucleating and nuclei growing were measured under various experimental conditions. The experimental results showed that both nucleating and growing rates of CaCO 3 increased obviously with surface temperature and concentration of reagents. In addition, the experiment of fouling induction period on the surface material of chemical plated niche phosphorus polytetrafluoroethylene indicated that not only the nucleate rate of CaCO 3 decreased but also some fouling particles with certain size were easy to peel off from the heating surface under sheering stress, which means that the property of surface material is one of the most important factors influencing fouling induction periods. |
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| Keywords: | induction period nucleation/fouling particle growth |
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