Rational Choice of a Basket for the Rotational Vibropriller

Yurchenko, Oleksandr; Sklabinskyi, Vsevolod Ivanovych; Ochowiak, Marek; Ostroha, Ruslan; Gusak, Oleksandr

doi:10.21272/jes.2022.9(1).f3

Cited by 5 publications

(4 citation statements)

References 9 publications

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“…It is possible to calculate the velocities of pellets (Fig. 1) from numerical solutions of the differential equations of pellet motion [3]:…”

Section: Resultsmentioning

confidence: 99%

“…Research conducted at the Chemical Engineering Department of Sumy State University (Ukraine) [3] was dedicated to solving this problem. These studies were based on the rich practical experience gained by the department's employees during the introduction of rotary vibration granulator (RVG) designs developed at the department into industry in different countries of the world.…”

Section: Methodsmentioning

confidence: 99%

“…Refinement of methods for calculating heat transfer coefficients using experimental data in various equipment is a task to which many scientific works of scientists in different countries of the world are devoted [3][4][5][6][7][8][9][10]. But specifying the methods of calculating these coefficients for systems of drops or pellets and air, in their mutual movement, is a difficult task, the number of publications in this direction is limited, and similar studies are relevant.…”

Section: Introductionmentioning

confidence: 99%

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Determination of the heat transfer coefficient between pellets and air during the modernization of a pelletizing tower based on industrial research

Nichvolodin,

Sklabinskyi

2023

TAPR

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The object of research is the heat transfer coefficient between pellets and air flow in industrial granulation towers. The problem lies in the difficulty of optimizing the heat transfer process. As a result of experiments and analysis, it was shown that each granulating tower for the production of mineral fertilizers has unique properties that significantly affect the efficiency of heat transfer. There are general mathematical models, but for accurate modeling and optimization of heat transfer, the unique characteristics of each production must be taken into account. The results showed that creating an accurate mathematical model for each specific fertilizer production is a difficult task due to the large number of unmeasured or difficult to reconcile factors. The method of calculating the heat transfer coefficient for the granulator tower obtained in the course of the work derives from a set of researches on the production of mineral fertilizers. This approach is based on the analysis of technical parameters and granulation composition of the product. The developed method makes it possible to reliably ensure the operating conditions of the device during modernization and changes in production volumes. These results are important for both practical and theoretical purposes. They can be used to accurately predict the operating conditions of equipment during modification and productivity growth. According to the research results, this approach allows obtaining fairly reliable data for forecasting the thermodynamic conditions of the tower equipment in the event of its modernization and transition of the granulation tower to the production of an increased amount of products. The specified method was tested in calculations of production modernization at urea production plants (Indian Farmers Fertilizer Cooperative (Iffco), India), Rustavi Azot LLC (Georgia), Grodno Azot LLC (Republic of Belarus) and others. This method has proven to be quite reliable in predicting the possible need for an additional amount of air supplied to the tower and forming requirements for the operating parameters of rotary vibrating granulators in the event of a significant increase in the load on the float in the tower and an increase in the amount of products planned for release.

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“…It is possible to calculate the velocities of pellets (Fig. 1) from numerical solutions of the differential equations of pellet motion [3]:…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Determination of the heat transfer coefficient between pellets and air during the modernization of a pelletizing tower based on industrial research

Nichvolodin,

Sklabinskyi

2023

TAPR

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“…To determine the parameters of fluid outflow through the round holes in the thin wall, secondary breakup of dropping liquid, and the effect of superimposed vibrations on droplet oscillation modes in the prilling process, the recommendations presented in previous works [26][27][28][29] were used. There are practically no recommendations for determining the flow parameters in the presence of other conditions, such as the inclination of the orifice axis or the presence of flow circulation in front of the orifice.…”

Section: Methodsmentioning

confidence: 99%

Experimental Studies and Condition Monitoring of Auxiliary Processes in the Production of Al2O3 by Sol–Gel Technology

et al. 2022

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Powders and granules of heavy metal oxides produced through condition monitoring are in high demand as intermediate products for obtaining fine-grained ceramics for a wide range of applications, i.e., nuclear fuel and fuel elements for nuclear power plants. Sol–gel technology to produce nuclear fuel (UO2), as well as catalysts (ThO2) for organic synthesis in the form of granules from pressed microspheres, is a promising method to obtain powders and granules of heavy metal oxides (fine-graded ceramics). Al2O3 was selected as the model analog at the stages of obtaining a solution of heavy metal and sol, the formation and gelation of droplets, and the preparation of gel spheres and their further washing and drying, as well as recovery and firing of particles. In the study, the main parameters were substantiated, e.g., the diameter and angle of inclination of the axis for the holes in the perforated shell, the multiplicity of sol circulation before the holes, the coefficients of liquid (sol) flow rate, the oscillation frequency of the disperser, and the concentration of surfactant and acid in sol. All of these parameters affect the characteristics of the granules that are obtained by sol–gel technology. Moreover, recommendations to increase productivity and the energy efficiency of production were also given. In particular, it was found that oscillation frequency in a range of 70–80 Hz leads to a granulometric composition of the obtained granules of 2.0–2.2 mm. A hole of 0.85 mm and a frequency of 100 Hz slightly change this range to 1.2–2.0 mm, while maintaining monodispersity.

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