This paper is the first to treat the solar pond system as a special kind of chemical reactor and separation equipment in the light of theory of chemical engineering and has discussion on it in detail. Based on a great number of experimental data carried out outside field, the paper analyses and studies systematically the parameters of dynamics of brine of the quaternary system Na+,K+,Mg2+∥Cl--H2O during the evaporation period from the stage of sodium chloride to the stage of bischofite, and then analyses all the parameters theoretically and make some proper assumption that is proved by analysis of field data to deduce a theoretical relation of evaporation dynamic of highly concentrated brine in solar ponds, finally the paper develops a actual experimental model that describes the evaporation of the brine of the system of Na+,K+,Mg2+∥Cl--H2O. The experimental model can be changed simply into an other form that can be effectively used in the design and management of solar ponds system production. The paper also discusses some way of using the experimental model in a computer automatic management system of solar ponds in the production in the industry in future. By analyzing all the experimental data tested in the outside field and the meteorological data, also the paper deals with the some relationship of the parameters above and give a result that will be significant for the effective.%首次从化学工程的角度，将盐田系统作为一类特殊的化学反应器和无机盐分离设备进行了详细的论述。在大量试验基础上，系统地分析和研究了Na+,K+,Mg2+∥Cl-,-H2O四元水盐体系卤水在天然蒸发状态下的宏观蒸发动力学参数。从理论上对与卤水蒸发相关的多种参数进行了分析和合理简化，概述了卤水蒸发过程中的质量传递规律。并在此基础上通过计算机模拟方法建立了四元水盐体系高浓度卤水在特定地域中进行天然蒸发的卤水宏观蒸发动力学模型，证明了多种简化和理论假设的合理性。对该数学模型在盐湖卤水开发中的盐田设计、盐田生产的现代化自动管理和控制等进行了探讨。在卤水蒸发动力学模型建立的过程中，针对实际生产过程的需要，通过多种参数的分析，建立了多种参数关系。
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