OPTIMIZATION OF THE SOLID FUEL COMBUSTION PROCESS IN COMBUSTION CHAMBERS IN ORDER TO REDUCE HARMFUL EMISSIONS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F19%3A00338703" target="_blank" >RIV/68407700:21220/19:00338703 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.32014/2019.2518-1726.71" target="_blank" >https://doi.org/10.32014/2019.2518-1726.71</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.32014/2019.2518-1726.71" target="_blank" >10.32014/2019.2518-1726.71</a>

Jazyk výsledku

angličtina

Název v původním jazyce

OPTIMIZATION OF THE SOLID FUEL COMBUSTION PROCESS IN COMBUSTION CHAMBERS IN ORDER TO REDUCE HARMFUL EMISSIONS

Popis výsledku v původním jazyce

The methods of numerical simulation are used to study the processes of heat and mass transfer in the combustion chamber of an operating coal-burning Kazakhstan thermal power plant. Computational experiments were performed on the combustion of high-ash Karaganda coal in the combustion chamber of the BKZ-75 boiler (Shakhtinsk, Karaganda region). As a result of numerical simulation of the combustion processes, the distributions of the total velocity vector, temperature fields, concentration fields of nitrogen oxides NO over the entire volume of the combustion chamber and at its exit were obtained. A comparative analysis of the characteristics of heat and mass transfer processes for the two studied modes of supplying fuel to the combustion chamber through burner devices is given for the direct-flow method of supplying the mixture when the burners are located on opposite side walls and the vortex method of supplying the mixture when the burners are installed at a 30-degree angle from the center of symmetry of the boiler. It is shown that the vortex method of supplying air mixtures allows optimizing the combustion of high-ash coal, since in this case there is an increase in temperature in the core of the torch and a decrease in it at the exit from the combustion chamber, which has a significant effect on the chemical processes of the formation of combustion products. The average value of the concentration of nitrogen oxide NO at the outlet of the combustion chamber decreases when using burner devices with a swirl of the mixture flow and conforms to norms the maximum permissible concentration.

Název v anglickém jazyce

OPTIMIZATION OF THE SOLID FUEL COMBUSTION PROCESS IN COMBUSTION CHAMBERS IN ORDER TO REDUCE HARMFUL EMISSIONS

Popis výsledku anglicky

The methods of numerical simulation are used to study the processes of heat and mass transfer in the combustion chamber of an operating coal-burning Kazakhstan thermal power plant. Computational experiments were performed on the combustion of high-ash Karaganda coal in the combustion chamber of the BKZ-75 boiler (Shakhtinsk, Karaganda region). As a result of numerical simulation of the combustion processes, the distributions of the total velocity vector, temperature fields, concentration fields of nitrogen oxides NO over the entire volume of the combustion chamber and at its exit were obtained. A comparative analysis of the characteristics of heat and mass transfer processes for the two studied modes of supplying fuel to the combustion chamber through burner devices is given for the direct-flow method of supplying the mixture when the burners are located on opposite side walls and the vortex method of supplying the mixture when the burners are installed at a 30-degree angle from the center of symmetry of the boiler. It is shown that the vortex method of supplying air mixtures allows optimizing the combustion of high-ash coal, since in this case there is an increase in temperature in the core of the torch and a decrease in it at the exit from the combustion chamber, which has a significant effect on the chemical processes of the formation of combustion products. The average value of the concentration of nitrogen oxide NO at the outlet of the combustion chamber decreases when using burner devices with a swirl of the mixture flow and conforms to norms the maximum permissible concentration.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

20303 - Thermodynamics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

NEWS OF THE NATIONAL ACADEMY OF SCIENCES OF THE REPUBLIC OF KAZAKHSTAN-SERIES PHYSICO-MATHEMATICAL

ISSN

1991-346X

e-ISSN

2518-1726

Svazek periodika

6

Číslo periodika v rámci svazku

328

Stát vydavatele periodika

KZ - Republika Kazachstán

Počet stran výsledku

9

Strana od-do

34-42

Kód UT WoS článku

000503371300004

EID výsledku v databázi Scopus

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