NUMERICAL SIMULATION OF HEAT AND MASS TRANSFER AT THE PARTIAL STOP OF FUEL SUPPLYING IN THE CHAMBER OF TPP

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F20%3A00341429" target="_blank" >RIV/68407700:21220/20:00341429 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.32014/2020.2518-1726.29" target="_blank" >https://doi.org/10.32014/2020.2518-1726.29</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.32014/2020.2518-1726.29" target="_blank" >10.32014/2020.2518-1726.29</a>

Jazyk výsledku

angličtina

Název v původním jazyce

NUMERICAL SIMULATION OF HEAT AND MASS TRANSFER AT THE PARTIAL STOP OF FUEL SUPPLYING IN THE CHAMBER OF TPP

Popis výsledku v původním jazyce

In this article, using numerical methods, studies have been performed to determine the effect of a forced partial stop of coal dust supply (emergency mode) through burners on the main characteristics of the combustion chamber of the BKZ-75 boiler of the Shakhtinskaya thermal power plant. Using computer simulation methods, various modes of supplying pulverized coal into the combustion chamber were investigated. Direct-flow method of supplying air mixture, when only two direct-flow burners work out of four burners, and two are in emergency mode. The vortex method of supplying the mixture, when two vortex burners operate with four torches with a swirl angle of the mixture flow and tilting them to the center of symmetry of the boiler by 30 degrees, and two are in emergency mode. The performed computational experiments made it possible to obtain the main characteristics of the heat and mass transfer process in the combustion chamber: flow aerodynamics, temperature fields, and concentrations of harmful substances (carbon and nitrogen dioxides) in the combustion chamber and at its exit. A comparative analysis was carried out for the two investigated emergency conditions (direct-flow and vortex), on the basis of which it was concluded that in the event of a forced partial stop of the burners, the use of a vortex method of supplying air mixture improves the metabolic processes in the combustion chamber and reduces emissions of harmful substances into the atmosphere.

Název v anglickém jazyce

NUMERICAL SIMULATION OF HEAT AND MASS TRANSFER AT THE PARTIAL STOP OF FUEL SUPPLYING IN THE CHAMBER OF TPP

Popis výsledku anglicky

In this article, using numerical methods, studies have been performed to determine the effect of a forced partial stop of coal dust supply (emergency mode) through burners on the main characteristics of the combustion chamber of the BKZ-75 boiler of the Shakhtinskaya thermal power plant. Using computer simulation methods, various modes of supplying pulverized coal into the combustion chamber were investigated. Direct-flow method of supplying air mixture, when only two direct-flow burners work out of four burners, and two are in emergency mode. The vortex method of supplying the mixture, when two vortex burners operate with four torches with a swirl angle of the mixture flow and tilting them to the center of symmetry of the boiler by 30 degrees, and two are in emergency mode. The performed computational experiments made it possible to obtain the main characteristics of the heat and mass transfer process in the combustion chamber: flow aerodynamics, temperature fields, and concentrations of harmful substances (carbon and nitrogen dioxides) in the combustion chamber and at its exit. A comparative analysis was carried out for the two investigated emergency conditions (direct-flow and vortex), on the basis of which it was concluded that in the event of a forced partial stop of the burners, the use of a vortex method of supplying air mixture improves the metabolic processes in the combustion chamber and reduces emissions of harmful substances into the atmosphere.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

Projekt

—

Návaznosti

O - Projekt operacniho programu

Rok uplatnění

2020

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

2

Číslo periodika v rámci svazku

330

Stát vydavatele periodika

KZ - Republika Kazachstán

Počet stran výsledku

9

Strana od-do

166-174

Kód UT WoS článku

000525761000021

EID výsledku v databázi Scopus

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