The Development And Mathematical Modeling Of The High Temperature Circulating Water Treatment Agent

Industry circulating water (>98℃) easily produces scale at high temperature, and the corrosion of water enlarges. The normal water treatment agents are used at ordinary temperature or medium temperature, and are degradation at high temperature. The objective of this thesis is to develop a water treatment agent which is suitable to high circulating water, and optimize of the compound agent by mathematical modeling.The research progress is followed: First, pick scale inhibitors which are applicable to high temperature by static inhibiting scale test and perpendicularity. Second, select corrosion inhibitors which are used at high temperature by static hang-slice and perpendicularity. Third, establish a mathematical model reflecting the mechanism of the compound agent for the water treatment on the basic of data test, and optimize the agent composition by multi-mode method and test the results by experiments. Fourth, appraise and search the active mechanism of the compound agent by means of changing the condition of the high temperature cyclic water, and verify the mechanism by a constant electric potential method and the scanning electronic microscopy ,etc.The characteristic of this thesis is to establish a mathematical model according to the active mechanism of the elected agent and the test result of elect- inhibitors. The control-objective variety is elected after making sure of the action form. The mathematical model is established by means of application of multiple unit anti-linear regression analysis. This program isapplication of multiple unit anti-linear regression analysis. This program is the basis of optimization of the compound agent. Through the application of mathematical statistics, the analysis of mechanism and the verification test, outstanding linear correlation of mathematical model is assured.The water treatment agent which is available to high temperature is verified by various science methods, and optimized the compound agent on the basic of mathematical modeling. The agent which has synergistic effects consists of 7.7mg/L molybdate, 1.3mg/L zincoid and 8.3mg/L phosphonic acid. The agent used in the high temperature circulating water has favourable effect on scale and corrosion inhibition. This agent is a catelectrode-do\minate compound agent.Development of a water treatment agent which treats high temperature circulating water has social and economic importance.