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<p>This work presents the results of a numerical study of the working processes of burning lignite in a vortex furnace with swirling countercurrent flows. The results of computer simulation of the processes of burning lignite with a moisture content of 30%, an ash content of 20% and 35% and a higher calorific value of Qрв = 13.9 MJ/kg and 9.7 MJ/kg, respectively are given. The fields of temperature distribution, gas velocity and particle trajectory in the volume and at the outlet of the furnace are determined. The values of the swirling flow velocity near the exit from the furnace reach 150-170 m/s. Mechanical underburning is 3.7% and 9.4% depending on the ash content. The results of a numerical study have showed that the diameter of lignite particles affects their combustion process: coke particles with an initial diameter from 25 microns to 250 microns burn out by 96%. The furnace provides a complete combustion of pulverized coal particles - 99.8% and of volatiles - 100% at volumetric heat stress in the 2500 kW/m<sup>3</sup> furnace. The afterburning of fuel particles containing carbon is ensured by their circulation</p>
</abstract>

This work presents the results of a numerical study of the working processes of burning lignite in a vortex furnace with swirling countercurrent flows. The results of computer simulation of the processes of burning lignite with a moisture content of 30%, an ash content of 20% and 35% and a higher calorific value of Qрв = 13.9 MJ/kg and 9.7 MJ/kg, respectively are given. The fields of temperature distribution, gas velocity and particle trajectory in the volume and at the outlet of the furnace are determined. The values of the swirling flow velocity near the exit from the furnace reach 150-170 m/s. Mechanical underburning is 3.7% and 9.4% depending on the ash content. The results of a numerical study have showed that the diameter of lignite particles affects their combustion process: coke particles with an initial diameter from 25 microns to 250 microns burn out by 96%. The furnace provides a complete combustion of pulverized coal particles - 99.8% and of volatiles - 100% at volumetric heat stress in the 2500 kW/m3 furnace. The afterburning of fuel particles containing carbon is ensured by their circulation

Numerical simulation of the processes of burning lignite in a vortex furnace with swirling countercurrent flows

Kharkiv National University of Civil Engineering and Architecture

Ukrainian State university of railway transport

Production Engineering Archives

This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License.

This work presents the results of a numerical study of the working processes of burning lignite in a vortex furnace with swirling countercurrent flows. The...

Numerical simulation of the processes of burning lignite in a vortex furnace with swirling countercurrent flows

Published Online: May 19, 2022

Page range: 141 - 149

Received: Dec 01, 2021

Accepted: Jan 28, 2022

DOI: https://doi.org/10.30657/pea.2022.28.16

Keywords
combustion processes numerical simulation, lignite, vortex furnace, swirling countercurrent flows

© 2022 Andriy Redko et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License.

Numerical simulation of the processes of burning lignite in a vortex furnace with swirling countercurrent flows

Published Online: May 19, 2022

Page range: 141 - 149

Received: Dec 01, 2021

Accepted: Jan 28, 2022

DOI: https://doi.org/10.30657/pea.2022.28.16

Keywordscombustion processes numerical simulation, lignite, vortex furnace, swirling countercurrent flows

© 2022 Andriy Redko et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License.

Keywords
combustion processes numerical simulation, lignite, vortex furnace, swirling countercurrent flows