OCR Text |
Show burner A heat input = 520 kW 1000- 950- kW/m2 • 900- | 850- M C 0) U 800- S 750- £ 1 700- 650- 600- 550- 500- \ = 1,05 p, > 0,5 mbar T... = 690'C 1800 \ -1750 °C 1700 1650 1600 -1550 -1500 -1450 1400 0 1000 2000 3000 4000 furnace length mm Fig 5 Radiative Heat Flux Density (a,) as a Function of Furnace Length and Mean Furnace Wall Temperature Tv mV 35 33 32 31 30 29 28 27 26 25 24 23' 22 21- 20- burner A heat input = 520 k W X = 1,05 p( > 0,5 mbar T.„ = 690*C 1800 T... -1500 -1450 1400 0 1000 2000 3000 4000 furnace length mm Fig 6 Signal from Total Heat Flux Probe (q,) as a Function of Furnace Length and Mean Furnace Wall Temperature T w r fuel gas c£> n u c air ^-4-^ f { ' •• r '•' ; - S$H 7 ^ " **&?& 5£&toiS3%ft - 1 | ^ | ^ iJ^t^rTXE It i(r.5^I)T35v*u ri= . ~»;•• i~'. • r .. •*' • • 1 Fig. 7 Burner B burner A and B heat input = 520 kW group H natural gas 3000 NO, mg/m3 2500 2000- 1500- 1000 500 ,.= Pf3 T„ 1,05 0,5 mbar = 690'C burner B 800 1000 1200 1400 1600 mean furnace wall temperature T w *C Fig 8 NOx Emission from Burner A and B as a Function of Mean Furnace Wall Temperature T w |