NOx Reduction Characteristics of Air Staging Burner for Pulverized-coal Combustion
공기 다단공급식 미분탄 버너의 NOx 저감 특성
-
Park, Chu-Sik
(Korea Institute of Energy Research)
;
- Kim, Sung-Won (Korea Institute of Energy Research) ;
- Choi, Snag-Il (Korea Institute of Energy Research)
- Published : 2001.11.16
Abstract
The combustion test used DTF was performed to obtain the characteristics of NOx emission and reduction. In this test, major factor of NOx emission was a stoichiometric air ratio. At the onset of combustion to be rich oxygen, NOx was produced rapidly. Optimum condition for NOx reduction was formed under about AR:0.7 in the combustion test of Alaska coal. Investigations were undertaken with 200KW(th) test combustor. In combustion test, the major variables were coal feed ratio of center/outer, stoichiometric air ratio at the onset of combustion. The lowest NOx emission, 182ppm(6% O2 base), was achieved at about AR:0.6 of the first combustion stage with low NOx burner. Also, unburned carbon content of char collected in this combustion condition was about 1wt%.