Heat mass transfer model of fouling process of calcium carbonate on heat transfer surface  

作　　者：QUAN ZhenHua CHEN YongChang MA ChongFang 

机构地区：[1]Education Ministry Key Laboratory of Enhanced Heat Transfer and Energy Conservation,College of Environmental and Energy Engineering,Beijing University of Technology,Beijing 100022,China

出　　处：《Science China(Technological Sciences)》2008年第7期882-889,共8页中国科学（技术科学英文版）

基　　金：the National Basic Research Program of China ("973" Project) (Grant No. G2000026304);the Beijing Municipal Elitist Cultivation Project (Grant No. 20061D0501500186)

摘　　要：A new heat mass transfer model was developed to predict the fouling process of calcium carbonate on heat transfer surface. The model took into account not only the crystallization fouling but also the particle fouling which was formed on the heat transfer surface by the suspension particles of calcium carbonate in the su- persaturated solution. Based on experimental results of the fouling process, the deposition and removal rates of the mixing fouling were expressed. Furthermore, the coupling effect of temperature with the fouling process was considered in the physics model. As a result the fouling resistance varying with time was obtained to describe the fouling process and the prediction was compared with experimental data under same conditions. The results showed that the present model could give a good prediction of fouling process, and the deviation was less than 15% of the experimental data in most cases. The new model is credible to predict the fouling process.A new heat mass transfer model was developed to predict the fouling process of calcium carbonate on heat transfer surface. The model took into account not only the crystallization fouling but also the particle fouling which was formed on the heat transfer surface by the suspension particles of calcium carbonate in the supersaturated solution. Based on experimental results of the fouling process, the deposition and removal rates of the mixing fouling were expressed. Furthermore, the coupling effect of temperature with the fouling process was considered in the physics model. As a result the fouling resistance varying with time was obtained to describe the fouling process and the prediction was compared with experimental data under same conditions. The results showed that the present model could give a good prediction of fouling process, and the deviation was less than 15% of the experimental data in most cases. The new model is credible to predict the fouling process.

关 键 词：FOULING CALCIUM CARBONATE HEAT mass TRANSFER model 

分 类 号：TK124[动力工程及工程热物理—工程热物理]