钾石盐溶液密度的测定及变化规律研究

Density change rule of potassium salt solution

以研究不同温度、浓度、组成的钾石盐溶液密度,为钾石盐太阳池构建和运行维护提供理论依据为目的,采用电子密度天平测定不同条件下配置的钾石盐溶液密度,使用origin数据分析工具、matlab建模工具分析试验数据。结果表明:钾石盐溶液密度随温度、浓度变化的数学模型为:ρ=0.6457 s-0.0003752 t+1.0107,模型预测值和试验值的相对误差小于0.38%。钾石盐溶液密度随温度升高而减小,随浓度的增大而增大,一定盐度的钾石盐溶液密度随钾离子含量的增大呈减小趋势,试验建立的计算钾石盐溶液密度的数学模型可靠。

In order to study the density of sylvite solution in different temperatures,concentrations,and compositions and to provide theoretical basis for the construction and the maintenance of sylvite solar pond,the density of sylvite solution is measured by an electronic density balance and the experimental data is analyzed by origin data analysis tool and matlab modeling tool.The results show that the mathematical model of the density of sylvite solution changing with temperature and concentration is ρ=0.6457 s-0.0003752 t+1.0107,the relative error between the predicted value and the experimental value is less than 0.38%.It is concluded that the density of sylvite solution with a certain composition decreases as the temperature increases,whereas the density increases with the increase of the concentration.The density of sylvite solution with a certain salinity decreases while the potassium ion content increases.In addition,the mathematical model for calculating the density of sylvite solution established by the experiment is reliable.