碳酸钙在铜基加热表面上结垢诱导期的研究  

Fouling induction period of CaCO 3 on heated surface

作　　者：刘天庆[1,2] 王兴海[1,2] 

机构地区：[1]大连理工大学化学工程研究所 [2]清华大学核能研究所

出　　处：《大连理工大学学报》1999年第3期400-404,共5页Journal of Dalian University of Technology

基　　金：国家自然科学基金

摘　　要：采用显微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的核化速率和垢粒长大速率均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．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.

关 键 词：诱导期 成核 污垢 表面材料 碳酸钙 铜基 

分 类 号：TG172.6[金属学及工艺—金属表面处理] TG178[金属学及工艺—金属学]