THE 3-D MODELLING OF HEAT AND MASS TRANSFER DURING COMBUSTION OF LOW-GRADE COAL
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F20%3A00346109" target="_blank" >RIV/68407700:21220/20:00346109 - isvavai.cz</a>
Výsledek na webu
<a href="https://doi.org/10.2298/TSCI191107062S" target="_blank" >https://doi.org/10.2298/TSCI191107062S</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.2298/TSCI191107062S" target="_blank" >10.2298/TSCI191107062S</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
THE 3-D MODELLING OF HEAT AND MASS TRANSFER DURING COMBUSTION OF LOW-GRADE COAL
Popis výsledku v původním jazyce
Using numerical methods, the basic characteristics of heat and mass transfer processes in the furnace chamber of the BKZ-75 boiler of the Shakhtinskaya TPP (Kazakhstan) were studied during a forced partial stop of the supply of coal dust through the burners. Two modes of fuel supply were studied; a direct-flow method of supplying air mixtures, when two direct-flow burners are working and two are in emergency mode and vortex method of supplying air mixtures - two vortex burners with a swirl angle of the air mixture flow and their inclination the center of symmetry of the boiler by 30 degrees and two are in emergency mode. The computational experiments allowed to obtain the distributions of the total velocity vector, temperature fields, concentration fields of CO, NO2 throughout the entire volume of the combustion chamber and conduct a comparative analysis for the two investigated emergency mode (direct-flow and vortex). Based on the results, it can be concluded that in the case of a forced partial stop of the supply of coal dust, the use of the vortex method of supplying air mixtures improves heat and mass transfer processes and allows minimizing emissions of harmful substances.
Název v anglickém jazyce
THE 3-D MODELLING OF HEAT AND MASS TRANSFER DURING COMBUSTION OF LOW-GRADE COAL
Popis výsledku anglicky
Using numerical methods, the basic characteristics of heat and mass transfer processes in the furnace chamber of the BKZ-75 boiler of the Shakhtinskaya TPP (Kazakhstan) were studied during a forced partial stop of the supply of coal dust through the burners. Two modes of fuel supply were studied; a direct-flow method of supplying air mixtures, when two direct-flow burners are working and two are in emergency mode and vortex method of supplying air mixtures - two vortex burners with a swirl angle of the air mixture flow and their inclination the center of symmetry of the boiler by 30 degrees and two are in emergency mode. The computational experiments allowed to obtain the distributions of the total velocity vector, temperature fields, concentration fields of CO, NO2 throughout the entire volume of the combustion chamber and conduct a comparative analysis for the two investigated emergency mode (direct-flow and vortex). Based on the results, it can be concluded that in the case of a forced partial stop of the supply of coal dust, the use of the vortex method of supplying air mixtures improves heat and mass transfer processes and allows minimizing emissions of harmful substances.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
20303 - Thermodynamics
Návaznosti výsledku
Projekt
—
Návaznosti
O - Projekt operacniho programu
Ostatní
Rok uplatnění
2020
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Thermal Science
ISSN
0354-9836
e-ISSN
2334-7163
Svazek periodika
24
Číslo periodika v rámci svazku
5
Stát vydavatele periodika
CS - Srbsko a Černá Hora
Počet stran výsledku
10
Strana od-do
2823-2832
Kód UT WoS článku
000543104900014
EID výsledku v databázi Scopus
2-s2.0-85089245543