A description is given of a vertical paddle mixer with a batch action of bulk materials. Based on the obtained experimental data, part of the previously published and newly identified equations of regression of mixing unevenness, the functions of the factors of the empirical mixing intensity coefficient are obtained. They take into account the influence of technological (proportion of the control component, volume of a mixing tank and its degree of filling), operating (mixer angle of the blades) and design(number of blades, blade length) mixer parameters. Based on the interconnection of the functions describing the power consumption, the required duration of mixing and the mass of the prepared mixture, a mathematical model of specific energy costs is obtained. Graphic materials are presented that make it possible to evaluate the combined effect of the mixer parameters on the mass of the prepared mixture, the duration of mixing, power consumption, and specific energy consumption. The rational use of the mixer with a share of the control component of at least 10%. With an increase in the stirrer rotation frequency of more than 350min-1, the intensity of the reduction in mixing time slows down. Reducing a portion of the mixture reduces energy costs. In terms of energy consumption, small mixers are more efficient, but they have low productivity.
The purpose of the research is to establish the relationship of the geometric parameters of the sinusoidal paddles of a mixer with part of the motion indicators of low-altitude radial sectors of bulk material and the possibility of numerical simulation using existing characteristics. The effect of the flat and sinusoidal mixer blades of the blender, in terms of their construction, on the process of moving layers of the mixed material has been theoretically studied. The equations obtained allow us to state that, due to the difference in the geometry of the blades' surface, when the blades are flat, an inertial shock occurs when the blade contacts the material sector due to its sharp acceleration to the peripheral velocity. With sinusoidal blades, acceleration to a specified velocity is stretched in time, taking into account the amplitude of the sinusoid, reducing the energy cost of the friction of material layers. The obtained equations allow us to identify the relationship and numerically simulate the change in the main indicators of the material position in the blender.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.