Study of the process of coal transfer by means of auger effector within the aggregate of boiling bedJournal: Mining of Mineral Deposits (Vol.11, No. 4)
Publication Date: 2017-12-30
Authors : A. Аsanov B. Mekenbaev D. Chalybekov J. Arziev;
Page : 79-85
Keywords : aggregate; auger; pyrolysis; semicoke; model; dynamics;
Purpose. The development and analysis of operation of a boiling bed aggregate with auger effector to feed and transfer coal inside a working chamber in the process of its thermal destruction. Methods. Method of graph theory has been applied to develop dynamic operation schedule of a mechanism to feed coal into a reactor of boiling bed. Mathcad system has been used to study mathematical model of operation of aggregate with a reactor of boiling bed. The results of the solution of a system of normal differential equations have been implemented by means of Runge-Kutta method with the preset adaptive pitch. Findings. A system of differential equations describing operations of mechanism to feed loose medium in a reactor and behaviour of a drive components with the application of Мdv moment to engine rotor and application of Мс resistance moment to a auger mechanism has been developed. Results of the auger drive modeling has shown that the engine acceleration and output of a rotor of a feeding mechanism engine as well as coal transfer within BB reactor to a nominal rotation frequency takes place almost after 0.5 sec; then, the auger rotates under stable mode with constant angular velocity. Originality. Mathematical model describing operation of auger effector to feed coal and transfer it inside the reactor of boiling bed has been developed in the form of a system of differential equations. New dependences of changes in temporal angular body movements have been determined. Practical implications. A combined device for coal pyrolysis and gasification making it possible to obtain continuously associated combustible gas in addition to a coking product has been designed. Methodological approach developed relative to complicated mechanical systems help obtain information concerning interrelations of its basic parameters involving structural features at the stage of the studied object design.
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