KINETICS OF THE PROCESS OF DRYING THE PASTE OF TITANIUM DIOXIDE IN AN ORIGINAL DRYING VORTEX APPARATUS AND OBTAINING A FINE POWDER TIO2
The authors of the article justified the physical model of the drying process of titanium dioxide paste and the drying of TiO2 fine powder to a residual moisture content of 0.3%, on the basis of which a mathematical model of the drying process is developed. The result of solving the mathematical model is the kinetic parameters of the drying process, with the help of which the drying apparatus of the vortex type was designed, designed and manufactured. The results of the simulation were verified by experimental studies of the drying and drying of TiO2 paste, and experimental graphical dependences of the drying rate and product temperature on the drying time were obtained. The obtained dependences are analyzed and the necessary initial parameters of the coolant are established, which allow increasing the drying rate and reducing energy costs for the drying process. As a result of the experiments, the fine powder of titanium dioxide fits the requirements of state standards and possesses the necessary mechanical and consumer properties. Bibl. 10, Fig. 7.
Pugsley T., Milne B., Berruti F. An innovative non-mechanical solids feeder for high solids mass fluxes in circulating fluidized beds. Powder Technology Journal. 1996. No. 2. pp. 123–131.
Costa I., Ferreira M., Freire J. Analysis of regime transitions and flow instabilities in vertical conveying if coarse particles using different solids feeding systems. The Canadian Journal of Chemical Engineering. 2004. No. 3. pp. 48–59.
Adamiec J. Drying of waste sludges in a fluidized bed dryer with a mixer. Drying Technology. 2002. No. 20. pp. 839–847.
Sklabіns’kiy V.І., Artyukhov A.Ye., Marenok V.M. Vpliv gіdrodinamіchnogo rezhimu obrobki na mіt- snіst’ granul poristoї amіachnoї selіtri. (PAS) [Influence of the hydrodynamic treatment regime on the strength of granules of porous ammonium nitrate]. Zbіrnik naukovikh prats. Kherson : PP Vishemirs’kiy V.S., 2007. pp. 83–85. (Ukr.)
Marchevs’kiy V.M., Grobovenko Ya.V. Protses sushіnnya napovnyuvacha paperovogo polotna. [The process of drying the filler of a paper cloth]. Vіsnik Natsіonal’nogo tekhnіchnogo unіversitetu Ukraїni «KPІ». Ser. Khіmіchna іnzhenerіya ekologіya ta resursozberezhennya [Bulletin of the National Technical University of Ukraine «KPI». Chemical Engineering, Ecology and Resource Conservation]. 2013. No. 1.
Marchevs’kiy V.M., Grobovenko Ya.V. Protses sushіnnya dіoksidu titanu [The process of drying titanium dioxide]. Mіzhnarodniy naukoviy zhurnal [International scientific journal]. 2016. No. 5. pp. 22–25. (Ukr.)
Malakhov M.M., Dyachenko S.V., Papush E.G., Klimenchuk O.A. Matematichna model’ sushіnnya dis- persnikh produktіv v aktivnomu gіdrodinamіchnomu sharі [Mathematical model of drying of disperse products in an active hydrodynamic layer]. Vіstі vishchikh navchal’nikh zakladіv. Kharchova tekhnologіya [Students of higher educational institutions. Food Technology]. 2005. No. 2–3. pp. 97–102. (Ukr.)
Ivanov I.G. Sushka melkodispersnykh materialov v kipyashchem sloe [Drying of Fine Materials in a Flui- dized Bed]. Moscow : Energiya, 2012. 126 p. (Rus.)
Aleksanyan I.Yu., Titova L.M., Nugmanov A.Kh. Modelirovanie protsessa sushki dispersnogo mate- riala v kipyashchem sloe [Modeling the drying process of a dispersed material in a fluidized bed]. Tekhnika i tekhnologiya pishchevykh proizvodstv. [Technique and technology of food production]. 2014. No. 3. pp. 96–100. (Rus.)
Pat. 108688 Ukr., MPK F 26 B 17/10 (2006.01). Aparat dlja sushіnnja pastopodіbnih materіalіv [Apparatus for drying paste-like materials]. Grobovenko Ya.V., Marchevskij V.M.; Claimed 09.02.2016; Publ. 25.07.2016, Bul. 14.