Computer Technologies of 3D Modeling by Combustion Processes to Create Effective Methods of Burning Solid Fuel and Reduce Harmful Dust and Gas Emissions into the Atmosphere

Aliya Askarova, Saltanat Bolegenova, Valeriy Maximov, Symbat Bolegenova, Nariman Askarov and Aizhan Nugymanova
Additional contact information
Aliya Askarova: Department Physics and Technology, al-Farabi Kazakh National University, al-Farabi Ave. 71, Almaty 050040, Kazakhstan
Saltanat Bolegenova: Department Physics and Technology, al-Farabi Kazakh National University, al-Farabi Ave. 71, Almaty 050040, Kazakhstan
Valeriy Maximov: Science Research Institute of Experimental and Theoretical Physics al-Faraby Kazakh National University Republic of Kazakhstan, al-Farabi Kazakh National University, al-Farabi Ave. 71, Almaty 050040, Kazakhstan
Symbat Bolegenova: Science Research Institute of Experimental and Theoretical Physics al-Faraby Kazakh National University Republic of Kazakhstan, al-Farabi Kazakh National University, al-Farabi Ave. 71, Almaty 050040, Kazakhstan
Nariman Askarov: Science Research Institute of Experimental and Theoretical Physics al-Faraby Kazakh National University Republic of Kazakhstan, al-Farabi Kazakh National University, al-Farabi Ave. 71, Almaty 050040, Kazakhstan
Aizhan Nugymanova: Department Physics and Technology, al-Farabi Kazakh National University, al-Farabi Ave. 71, Almaty 050040, Kazakhstan

Energies, 2021, vol. 14, issue 5, 1-22

Abstract: Using numerical methods, studies have been carried out to determine the effect of the introduction of the technology of two-stage combustion of high-ash Karaganda coal on the main characteristics of heat and mass transfer processes in the furnace of the BKZ-75 boiler at Shakhtinskaya TPP (Kazakhstan). Various regimes of supplying additional air into the combustion space, the volume of which varied from 0% (traditional basic version) to 30% of the total volume of air required for fuel combustion, have been investigated using 3D computer modeling methods. The performed computational experiments made it possible to obtain the distributions of the total velocity vector, temperature fields, concentration fields of carbon monoxide CO and nitrogen dioxide NO 2 over the entire volume of the furnace and at the outlet from it. The introduction of the two-stage combustion technology made it possible to optimize the combustion of high-ash coal, since in this case there is an increase in the temperature in the torch core and a decrease in it at the outlet from the furnace, which has a significant effect on the chemical processes of the formation of combustion products. Based on the results obtained, it can be concluded that an increase in the percentage of air supplied through additional injectors to 18% leads to a decrease in the concentrations of carbon monoxide CO by about 36%, and nitrogen dioxide NO 2 by 25% compared to the base case. A further increase in the volume of additional air leads to a deterioration in these indicators. The results obtained will make it possible to optimize the combustion of low-grade fuel in the furnace of the BKZ-75 boiler, increase the efficiency of fuel burnout, reduce harmful emissions into the atmosphere, and introduce a two-stage combustion technology at other coal-fired TPPs.

Keywords: thermal power engineering; two-stage combustion; high-ash coal; computer technology 3-D modeling; aerodynamics; temperature; carbon and nitrogen oxides (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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