剪切条件下油水乳状液含水率测量装置的设计

Design of water-content testing device for oil-water emulsions under shear conditions

针对传统油水乳状液含水率测量装置的准确性低、成本高、无法实现动态测量的问题,设计一种剪切条件下乳状液含水率的测量装置。系统利用油水两相的介电及电导特性的差异性,采用交流阻抗法测量待测乳状液的复阻抗参数,从而获得乳状液的含水率特征。结合搅拌装置模拟油水乳状液在运输环境下的剪切环境,间接实现油水乳状液的动态测量。实验测试表明:装置具有良好的重复性和稳定性,可实现剪切条件下对乳状液复阻抗参数的测量,证明乳状液的阻抗参数与含水率存在明显的线性关系,对进一步研究管道中油水两相的流动性质具有一定的参考价值。

A water-content testing device for oil-water emulsions is designed to solve the problems of the traditional water content measuring instrument with low measurement accuracy, high cost and infeasible of dynamic measurement. It adopts the impedance spectroscopy technology to get the complex impedance parameters of the unknown emulsion, which can obtain the information of water content based on the difference of the permittivity and conductivity of water and oil phase. The device applies the stirring system to simulate the shear force in transportation environment, realizing the dynamic measurement of oil-water emulsion. The experimental results show good repeatability and stability of the testing device. The device realizes the measurement of the impedance of the oil-water emulsions under the shear conditions and obtains the linear relationship between the water content and the impedance parameter. It has reference value to the study of the properties of oil-water two-phase flow in pipelines.