Intensification of mass transfer of the duct electrodialize system of the water cleaning in the permanent magnetic field

摘要

A number of the qualitatively new technological processes in the electrotechnical installation for processing the life support products are implemented when the mass transfer in the solution is controlled by application of the magnetic fields (for Hartmann numbers Ha = 0...4I). Analysis of active zones in the boundary layers, in the artificial turbulent areas in the new membrane zones modeled analytically and numerically allows to formulate principles for designing the intensive and optimal technologies and for selection of the technological modes for the electrochemical system operation. The mathematical model of interaction of the hydrodynamic, electric and magnetic fields in the electrochemical system is considered. The developed numerical method and the computation program for analysis of the mentioned fields allow to estimate influence of electroconductivity of system's structural elements as well as the magnetic and hydrodynamic fields directly influencing the intensity of the working process. For the ideal insulation properties of the electrodialize's frames the additionally induced electric field add up to 50% of the applied one depending on the Hartmann number with the 0...4 range. Increasing of the generalized electrical conductivity up to 4 decreases the induced electrical field down to zero. The study results permit to formulate requirements for selection of the electrodializer structural materials. Studies, made for the mentioned range of Hartmann's numbers and for the generalized electrical conductivity from 0 to 5, allow to propose a made for the mass transfer intensification in the electrochemical system. This decreases the consumed power by 20-40%.