Analytical studies on constrained particle settling velocity in a water suspension of fly ash from thermal power plants

Purpose. To establish analytical dependences for calculating the characteristics of ash suspension and velocity constrained settling coal quartz depending on particle size density medium, which is necessary design determining operating modes hydraulic devices extracting from water mineral fly thermal power plants. Methodology. The research was carried out basis a cellular model classical concepts motion in laminar turbulent flow. For evaluation suspension, defining correlations Wend formula viscosity were used. Ergun equation correlation analysis methods used to calculate analyze speed movement particles. Findings. Approximating nonlinear functions are obtained up 4 mm an with 1.31.8 g/cm3. It shown that, both ascending coal, there direct relationship between size, cases it nonlinear. any ascent extreme nature; rational range 1.551.8 g/cm3 maximum 1.65 established dependencies allow us determine particles, taking into account counter-flow liquid phase, as well boundary size. Originality. regime weak-turbulence flows approximation equations particles main components Novo-Kramatorska TPP, suspensions changes medium density. frames Stokes description processes established. that phase precipitating effective surfacing thin classes. Practical value. described approach can be various discrete solid flows. advantage wider coverage equipment modes. results designing technological operation technology complex processing TPPs.