Mixing of two immiscible phases measured by industrial electrical impedance tomography system

Abstract

The mixing of two immiscible phases is a process commonly seen in many industrial applications. Whether it is desirable (e.g. mixing of ingredients in chemical or food industry) or undesirable (e.g. sediments or contaminants in water purification) process, it has to be taken into consideration and a detailed description would be beneficial to any end product. This paper deals with a method for observing the volume ratio of two immiscible phases from the state of total separation to the state of a homogenous mixture using industrial Electrical Impedance Tomography (EIT) system ITS p2+. This paper also shows a great advantage in combining the EIT measuring method with a theoretically derived formula. It is used to calculate the concentration of a non-conductive phase in the final mixture using the initial and final conductivity values. The authors were also able to show a possibility to successfully use the formula in situations, where the initial conditions for it are not fully met.

Chemical and Process Engineering

“…The tomography techniques based on electrical impedance (e.g. Malík et al, 2019) or electrical resistance (e.g. Maluta et al, 2020) are used for the measurement of radial and axial profiles of the light immiscible liquid volumetric fraction.…”

The Liquid–Liquid Dispersion Homogeneity in a Vessel Agitated by a High-Shear Sawtooth Impeller

“…The determination of drop sizes in mixtures with high dispersed phase fractions requires an endoscope measurement technique [7]. The radial and axial profiles of the light immiscible liquid volumetric fraction can be obtained by the Electrical Resistance Tomography technique [8] or by the Electrical Impedance Tomography technique [9].…”