The Research And Implementation Of Solubility Prediction System In Salt-water

As vast as land in China, the resources of Saline Lake are very abundant, water salt system phase equilibrium is basis for development and utilization of salt lake resources, carry out the research work, not only has theoretical significance, but also can be used for the comprehensive utilization of salt lake resources guide. One of the most prominent features of the Saline Lake in the Qinghai Tibet Plateau is that the brine is rich in many kinds of rare elements such as lithium, the comprehensive Saline Lake brine, with a high value for industrial use. Therefore, it has important theoretical and practical significance to carry out the research on the representative system of the brine system in the typical Saline Lake.Study on phase equilibria in the system of water and salt in the early work for salts solubility calculation mainly through laboratory determination of phase equilibrium data and lead to some inevitable problems: Laboratory determination is not only time consuming and heavy workload. However, with the gradual development of the theoretical model of electrolyte solution, it provides a theoretical basis for the study of the equilibrium of the water and salt system.The relatively successful theoretical model of electrolyte solutions is a semi empirical Pitzer model. The model aims at using the specific parameters of the water and salt system to derive the solubility of the salts in the system. In the phase equilibrium of the system, some researchers began to explore the computer modeling electrolyte model to calculate the salt solubility, and has achieved great success. But the preliminary exploration of the shortcomings is the model without the use of the realization of the interface each time it is used in salt water systems with new computing should be re programming, error probability is very high and very tedious; using the model are calculated when need to use some of the parameters, these parameters information also not a convenient management means, All kinds of present situation created some obstructions to using of Pitzer Model.The purpose of this study is to make use of computer programming realization of Pitzer model interface and human-computer interaction, reduce the difficulty of the model to use, formed a set of to solve the water salt system phase equilibrium research work of the integrated management system. Through consulting a large number of documents, topic on how to use thermodynamic data fitting lack of Pitzer parameters, drawing the phase diagram of water and salt, prediction system, such as solubility to facilitate the research and put these research work extended to system function to, rich functions of the system at the same time, more convenient staff. So the research indeed has innovative and a very good significance.