Mathematical modeling of the fractional collection efficiency in a heat and mass exchanger and ways of improving it
Математическое моделирование фракционной эффективности пылеулавливания тепломассообменным оборудованием и способы ее повышения
Nurkhozhaev E.S. Kosarev N.P. Makarov V.N. Dyldin G.P.
2024Federal State Budgetary Educational Institution of Higher Education Ural State Mining University
Minerals and Mining Engineering
2024#2025Issue 5101 - 110 pp.
Relevance. The article shows the relevance of improving the fractional efficiency of dust collection from a heat and mass exchanger (HME) by replacing capital-intensive aspiration systems with energy-saving and environmentally efficient devices built directly into the dryer. Research objective is to develop a mathematical model for determining the fractional collection efficiency in HME, to verify and analyze the effectiveness of inertial gravitational separation devices to reduce dust content and improve the quality of dust collection. Methods of research are based on using a system of partial differential equations describing dust particles movement depending on their geometric and physical parameters in gravitational and aerodynamic force fields and reducing to a parameter function of the Stokes and Froude criteria. Research results. The coefficient of fractional collection efficiency in HME was determined as a dust collection quality factor. A mathematical model was built for calculating the coefficient of fractional collection efficiency in HME depending on its workspace parameters and the heat conductor aerodynamics. Experimental studies were conducted. Conclusions. The proposed mathematical model is based on the Stokes and Froude equations. The use of an inertial gravity aeroseparator integrated into the HME dryer makes it possible to increase the fractional efficiency to 0.9. The statistical analysis shows that with a confidence of 0.95, the confidence interval of fractional efficiency does not exceed ±9% in the range of fractional composition +100–2500 μm of chrysotile asbestos dust particles.
Archimedes force , dust collection , fractional collection efficiency , Froude criterion , inertial gravitational separation , Stokes criterion
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JSC “Kostanay minerals”, Zhitikara, Kazakhstan
Ural State Mining University, Yekaterinburg, Russian Federation
JSC “Kostanay minerals”
Ural State Mining University
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