OCR Text |
Show In addition, the SCAQMD has discussed the possibility of limiting emission of nitrogen oxide to less than 10 ppm (d, 3% 02). The only proven technology at this time to assure nitrogen oxide emission less than 10 ppm (d, 3% 02) is Selective Catalytic Reduction (SCR). Figure 1 (1) shows that SCR can achieve up to 90 percent reduction of NOx• The reduction is more properly stated as a level of NOx emissions in ppm. Control by SCR can limit emissions of NOx to less than 10 ppm (d, 3% 02). However, the cost of reducing NOx using SCR can approach $10,000/ton N02 removed. 50 45 -... 40 (\I 0 o 35 ~ t't') ... .30 -,:, '- ~25 a.: )(20 0 <: 15 10 5 0 0 LOW NOx BURNERS RECENT DEVELOPMENTS ~~1igr SCAOMD ---------------------------j--~------ . ........ ( """"""-0 o \ ~-- ------ --~a4-- ITRI WW NOx BURNER 5 10 15 FGR l%J 25 Figure 2 Performance of ITRI (E&RL) Low NOx Dual Fuel Burner. 4 WJS1OOSAPAOj AFRC-90-25 |