Naslov
SO3 formation and pollutant emission control in the heavy-oil fired furnace

Autori
Schneider, Daniel Rolph ; Bogdan, Željko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of Third International Mediterranean Combustion Symposium / Beretta, Federico ; Bouhafid, Abdelmounaim - Marakeš : Faculte des Sciences Semlalia, 2003, 633-645

Skup
Third International Mediterranean Combustion Symposium

Mjesto i datum
Marakeš, Maroko, 08.06.2003. - 13.06.2003

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
combustion; SO3; pollutant formation and reduction; furnace; heavy fuel oil

Sažetak
In this paper effects of various combustion process parameters and atomizer characteristics on SO3 and pollutant (CO, NO and soot) formation in the furnace, are investigated. By using the FLUENT CFD code, influences of combustion air excess ratio, combustion air distribution, swirl number and fuel atomization quality were analyzed. Since the PDF/equilibrium chemistry combustion model used for main reactions and species in the combustion process does not describe SO3 formation realistically, a new model, which takes into account finite kinetic character of SO3 reactions, was developed. A real steam generator furnace of the 210 MW oil-fired Power Plant Sisak has chosen as a case study. Decreased amount of combustion air (less oxygen) had the strongest effect on SO3 and NO reduction. By intensifying the combustion air swirl, a significant reduction of SO3, NO, CO, H2, SO and soot could be achieved and the net heat flux transferred to the furnace walls could be increased. Adequate combustion air distribution (ratio of primary, secondary and tertiary air stream) could also decrease the SO3 production but a care must be taken not to deteriorate the overall combustion quality. Variation of parameters that determine fuel atomisation quality showed almost negligible effect on SO3 reduction, but their influence was much stronger in terms of other pollutant formation. Finer atomisation of the fuel improved the quality of combustion and increased the net wall heat flux. An increase of the fuel spray angle led to lower concentrations of CO, H2, SO and soot, and enhanced the combustion efficiency. The conclusion was that preferred configuration of combustion parameters and burner design characteristics should include all examined measures combined in such a way that they provide a low pollutants emission and a high combustion efficiency.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA