Abstract
Mixing in chemical technology is used to intensify chemical and heat-mass transfer processes, as well as for preparing emulsions, suspensions and obtaining homogeneous systems. The simplest way to carry out the process, which does not require an additional supply of mechanical energy, is to mix in a direct-flow environment, which only requires flow energy. Analysis of the existing designs of direct-flow mixers showed that the use of swirling devices of various types in order to increase the efficiency of the process is very promising. This article describes a study of the influence of the geometrical dimensions of the screw on the efficiency of mixing a two-component mixture using the FlowVision software package.
Highlights
Mixing in liquid media is widely used in industry for the preparation of emulsions, suspensions and the preparation of homogeneous systems, as well as for the intensification of chemical, thermal and diffusion processes
To study the change in the quality of mixing in a circular pipe after an axial twisting device made in the form of a screw, we examined the average dispersion of concentrations in planes perpendicular to the axis of the apparatus and plot the dependence of the average dispersion on the distance to the screw
The use of swirling devices in direct-flow mixers allows to intensify the process without significantly increasing the overall dimensions of the apparatus
Summary
Mixing in liquid media is widely used in industry for the preparation of emulsions, suspensions and the preparation of homogeneous systems (solutions), as well as for the intensification of chemical, thermal and diffusion processes. In the latter case, mixing is carried out directly in devices designed for carrying out these processes, equipped with mixing devices [1-4]. An increase in the degree of turbulence of the system, achieved with stirring, leads to a decrease in the thickness of the boundary layer and an increase and continuous updating of the surface of the interacting phases This causes a significant acceleration of the processes of heat and mass transfer. Vortex mixers were considered, in which a single-auger screw was used as a twisting device
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