Numerical Analysis of NOx Control by Combustion Modifications in Pulverized Coal Utility Boiler
Само за регистроване кориснике
2012
Аутори
Belošević, SrđanBeljanski, Vladimir
Tomanović, Ivan D.
Crnomarković, Nenad Đ.
Tucaković, Dragan R.
Živanović, Titoslav
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Considerable research efforts focus on modeling NOx formation/destruction and predicting NOx emission so that it can be controlled. A motivation for this numerical study was to examine the efficiency of combustion modifications in the furnaces of Kostolac B 350 MWe boiler units, tangentially fired by pulverized lignite. Numerical analysis was done by an in-house developed NOx submodel, coupled with differential comprehensive combustion model, previously developed and validated. The NOx submodel focuses on homogeneous reactions of both the fuel and the thermal NO formation/destruction processes. The submodel was validated by comparison of predicted NOx emissions with available measurements at the boiler units. Selected predictions of the emission, the furnace exit gas temperature, NO concentration, gas temperature, and velocity field are given for the case-study furnace under different operating conditions. The individual or combined effects of coal and preheated air distribution over t...he individual burners and the burner tiers, the grinding fineness and quality of coal, and the cold air ingress were investigated. Reduced emissions of up to 20-30% can be achieved only by proper organization of the combustion process. Obtained results were verified by the boiler thermal calculations. An optimal range of the furnace exit gas temperatures was proposed, with respect to the safe operation of the steam superheater. Simulations by means of a computer code developed for the purpose, showed that the air staging using overfire air ports might provide the NOx emission reduction of up to 24% in the test-cases with relatively high emission and up to 7% of additional reduction in already optimized cases.
Извор:
Energy and Fuels, 2012, 26, 1, 425-442Финансирање / пројекти:
- Повећање енергетске и еколошке ефикасности процеса у ложишту за угљени прах и оптимизација излазне грејне површине енергетског парног котла применом сопствених софтверских алата (RS-MESTD-Technological Development (TD or TR)-33018)
- Electric Power Industry of Serbia
Напомена:
- Sino-Australian Symposium on Advanced Coal and Biomass Utilisation Technologies, Dec 09-11, 2011, Wuhan, Peoples R China
DOI: 10.1021/ef201380z
ISSN: 0887-0624; 1520-5029
WoS: 000299583400046
Scopus: 2-s2.0-84855919695
Колекције
Институција/група
VinčaTY - JOUR AU - Belošević, Srđan AU - Beljanski, Vladimir AU - Tomanović, Ivan D. AU - Crnomarković, Nenad Đ. AU - Tucaković, Dragan R. AU - Živanović, Titoslav PY - 2012 UR - https://vinar.vin.bg.ac.rs/handle/123456789/6938 AB - Considerable research efforts focus on modeling NOx formation/destruction and predicting NOx emission so that it can be controlled. A motivation for this numerical study was to examine the efficiency of combustion modifications in the furnaces of Kostolac B 350 MWe boiler units, tangentially fired by pulverized lignite. Numerical analysis was done by an in-house developed NOx submodel, coupled with differential comprehensive combustion model, previously developed and validated. The NOx submodel focuses on homogeneous reactions of both the fuel and the thermal NO formation/destruction processes. The submodel was validated by comparison of predicted NOx emissions with available measurements at the boiler units. Selected predictions of the emission, the furnace exit gas temperature, NO concentration, gas temperature, and velocity field are given for the case-study furnace under different operating conditions. The individual or combined effects of coal and preheated air distribution over the individual burners and the burner tiers, the grinding fineness and quality of coal, and the cold air ingress were investigated. Reduced emissions of up to 20-30% can be achieved only by proper organization of the combustion process. Obtained results were verified by the boiler thermal calculations. An optimal range of the furnace exit gas temperatures was proposed, with respect to the safe operation of the steam superheater. Simulations by means of a computer code developed for the purpose, showed that the air staging using overfire air ports might provide the NOx emission reduction of up to 24% in the test-cases with relatively high emission and up to 7% of additional reduction in already optimized cases. T2 - Energy and Fuels T1 - Numerical Analysis of NOx Control by Combustion Modifications in Pulverized Coal Utility Boiler VL - 26 IS - 1 SP - 425 EP - 442 DO - 10.1021/ef201380z ER -
@article{ author = "Belošević, Srđan and Beljanski, Vladimir and Tomanović, Ivan D. and Crnomarković, Nenad Đ. and Tucaković, Dragan R. and Živanović, Titoslav", year = "2012", abstract = "Considerable research efforts focus on modeling NOx formation/destruction and predicting NOx emission so that it can be controlled. A motivation for this numerical study was to examine the efficiency of combustion modifications in the furnaces of Kostolac B 350 MWe boiler units, tangentially fired by pulverized lignite. Numerical analysis was done by an in-house developed NOx submodel, coupled with differential comprehensive combustion model, previously developed and validated. The NOx submodel focuses on homogeneous reactions of both the fuel and the thermal NO formation/destruction processes. The submodel was validated by comparison of predicted NOx emissions with available measurements at the boiler units. Selected predictions of the emission, the furnace exit gas temperature, NO concentration, gas temperature, and velocity field are given for the case-study furnace under different operating conditions. The individual or combined effects of coal and preheated air distribution over the individual burners and the burner tiers, the grinding fineness and quality of coal, and the cold air ingress were investigated. Reduced emissions of up to 20-30% can be achieved only by proper organization of the combustion process. Obtained results were verified by the boiler thermal calculations. An optimal range of the furnace exit gas temperatures was proposed, with respect to the safe operation of the steam superheater. Simulations by means of a computer code developed for the purpose, showed that the air staging using overfire air ports might provide the NOx emission reduction of up to 24% in the test-cases with relatively high emission and up to 7% of additional reduction in already optimized cases.", journal = "Energy and Fuels", title = "Numerical Analysis of NOx Control by Combustion Modifications in Pulverized Coal Utility Boiler", volume = "26", number = "1", pages = "425-442", doi = "10.1021/ef201380z" }
Belošević, S., Beljanski, V., Tomanović, I. D., Crnomarković, N. Đ., Tucaković, D. R.,& Živanović, T.. (2012). Numerical Analysis of NOx Control by Combustion Modifications in Pulverized Coal Utility Boiler. in Energy and Fuels, 26(1), 425-442. https://doi.org/10.1021/ef201380z
Belošević S, Beljanski V, Tomanović ID, Crnomarković NĐ, Tucaković DR, Živanović T. Numerical Analysis of NOx Control by Combustion Modifications in Pulverized Coal Utility Boiler. in Energy and Fuels. 2012;26(1):425-442. doi:10.1021/ef201380z .
Belošević, Srđan, Beljanski, Vladimir, Tomanović, Ivan D., Crnomarković, Nenad Đ., Tucaković, Dragan R., Živanović, Titoslav, "Numerical Analysis of NOx Control by Combustion Modifications in Pulverized Coal Utility Boiler" in Energy and Fuels, 26, no. 1 (2012):425-442, https://doi.org/10.1021/ef201380z . .