| OCR Text |
Show 18 The effects of load variations, fuel quality, air preheat, exhaust gas recirculation rates, primary and secondary excess air ratios on NOx-emissions were investigated. The measured NOx-emissions (oil no.2: 27-47ppm, oil nO.6:1 04-119ppm) are far below the values of other comparable combustion systems, although the premix combustion is only partially achieved in this unit. A further improvement of the burner performance is desirable. Design concepts for industrial applications were presented and the potential of these systems was estimated to be less than 120ppm (2-stage process) and 75 ppm NOx (3-stage process) for a heavy fuel oil (O.5%N). References [1] KELLER, J.J. & SATIELMAYER, TH., "Double-cone burner for gas turbine type 9 retrofit application", CIMAC Florence, GOL (1991), 1-14 [2] SATIELMAYER, TH., FELCHLlN, M.P., HAUMANN, J., HELLAT, J. & STYNER, D., "Second generation low-emission combustors for ABB gas turbines: burner development and tests at atmospheric pressure", TRANSACTIONS OF THE ASME, 114/1, (1992),118-125 [3] SATTELMAYER et aI., VDI-Bericht Nr. 1090, Deutscher Flammentag, (1993) [4] C.-O. PELET, N.ROUGE, J. HAUMANN, T.SATTELMAYER "Amelioration du potentiel de reduction de la formation de NOx de la combustion etagee de fuellourd grace a I'utilisation d'un brOleur a premelange" Rapport pour la conference UNIPEDE/ AlE (International Energy Agency) , Hamburg (1993) |
