The effect of hydrodynamics conditions in the combustion chamber of a 670 MW CFB boiler on the emission of gaseous pollutants

• Autorzy: Sekret R. , Nowak W.

Warianty tytułu

PL

Wpływ warunków hydrodynamicznych w komorze paleniskowej kotła z CWF o mocy 670 MW na emisję zanieczyszczeń gazowych

• Języki publikacji: EN

Abstrakty

EN

An analysis of the effect of thermal and flow conditions in the combustion chamber of the circulating fluidized-bed (CFB) boiler on the gaseous pollutant emission was undertaken in the study. The tests were carried out on a 670 MW boiler operating in the power engineering industry. On the basis of the obtained test results it was found that the optimization of primary and secondary air distribution, as well as fuel distribution, allowed the following pollutant reductions: CO by 52%, SO2 by 40% and NO by 6% in relation to the standard operation conditions of the boiler under investigation. The test results demonstrated that increasing the number of repetitions of bed material particle circulation between the combustion chamber and the recycling system resulted in an equalization of temperature distribution along the combustion chamber height and elongated the time of residence of sorbent particles in the CFB system. Ultimately, the test results showed the following pollutant reductions: CO by 71%, SO2 by 41% and NOX by 19% with the number of particle circulation repetitions increased from 28 to 60 for the boiler analyzed.

Słowa kluczowe

EN

combustion; boiler; gaseous pollutants; thermal flow; hydrodynamic

PL

kocioł; komora paleniskowa; zanieczyszczenia gazowe; przepływ; hydrodynamika

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Systems : journal of transdisciplinary systems science
• Rocznik: 2006
• Tom: Vol. 11, nr 1
• Strony: 86--100
• Opis fizyczny: bibliogr. 5 poz.

Twórcy

autor

Sekret R.

autor

Nowak W.

• Częstochowa University of Technology, Dąbrowskiego 69, 42-200 Częstochowa,

Bibliografia

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• [2] JOHNSSON R, LECKNER B., HARTGE E.U., WERTHER J., SEKRET R., NOWAK W., NOSKIEVIC P., OCHODEK T., and others: An experimental study of in-furnace processes and dynamic behavior of a 235 MWe CFB boiler. VGB PowerTech, No. 3, 2004,1-10.
• [3] LAFANECHERE L., JESTIN L., BURSI J. M., ROULET V., DIMAGGIO T.: Operating behaviour and flexibility of circulating fluidized bed boiler. Proceedings of the 5th International Conference on Circulating Fluidized Beds, Beijing, China, May 28-31, 1996, 474-480
• [4] LEE J.-M., KIM J.-S., KIM S.-M., KIM J.-J., SONG K.-K.: Combustion characteristics of Korean anthracite in the 200 MWe Tonghae CFB Combustor. The Third Asia-Pacific Conference on Combustion, June 24-27, Seul, Korea, 2004,1-4.
• [5] MONTATNT D., FAUQUET P., LAFANECHERE L., BURSI J.: Two phase ID annular model of a CFB boiler furnace. ASME, Proceedings of the 14th International Conference on Fluidize Bed Combustion, Vol. 2,1997,1023-1032.