Formation and Removal Processes of CaC0₃ Fouling

Fouling and its removal of CaC0₃ 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 CaC0₃ increased obviously with concentration of reagents. In addition, the experiment of fouling induction period on the surface material of chemical plated niche-phosphorus-polytetrafluoroethylene indicates that not only the nucleate rate of CaC0₃ decreased but also the formed fouling layer was easy to peel off from the heated surface under shearing stress, which means that the property of surface material is one of the most important factors influencing fouling induction periods.