Mathematical simulation and calculation of the process of water demineralization in industrial filter Part 2. Influence of filter productivity and water composition changing on quality and quantity of purified water
The aim of this work was to study the effect of changing the composition of raw water feeding the cationic filter and the flow rate on the performance of water treatment process for power plant. Experiments were carried out at the Novocherkassk Power Plant central desalting unit, on an industrial filter loaded with the fresh cationic resin KU-2 in hydrogen form. Sodium concentration histories were measured at the output and in the middle bed point of the filter and dynamic break-through curves were plotted. The impact of changes in the composition of feeding water and its flow rate on the purification process was estimated by the comparison of experimental and calculated break-through. Two types of computation programs were compared, and the first one was for calculating single-component dynamics for film diffusion at sorption, with using mean values of the component concentrations. Another one was the «Createscheme» program, which allowed taking into account changes in boundary data. In the last case, best agreement between experimental and calculated data were shown, indicating the adequacy of the developed mathematical model to the real industrial process characterized with a variety of technological features.