1020 ㎿급 보일러에서 연소공기 분배비율이 NOx 발생량에 미치는 영향

Abstract

본 연구는 실제 운영 중인 당진화력 9호기 1020 ㎿ 정격운전 2단 연소방식 보일러를 대상으로 연소공기 분배비율 변경에 따른 NOx 변화를 연구하였다. 연소공기 분배비율 50 % 운전 중인 당진화력 9호기 보일러에서 전체 공기량을 일정하게 유지하고 연소공기 분배비율을 42 %에서 58 %까지 변경함으로써 고온구역인 2차 연소구역 연소공기량 변화가 NOx 발생량에 얼마나 영향을 미치는지 분석하였다. 연소공기 분배비율 변경으로 2차 연소구역 연소공기량 변경결과 NOx는 85.33 ppm부터 115.61 ppm까지 변화되었다. 이는 연소공기 분배비율 변경으로 온도가 높은 2차 연소구역에 연소공기량이 변경되면 NOx가 직접적으로 변화된다는 사실을 알 수 있었다.|This research assessed an formation of NOx depending on a changing value of combustion air distribution rate within 1020 ㎿ static boiler, currently operating in Dangjin power plant #9. Combustion air distribution rate is 50% operation being Dangjin power plant #9 exhalation keeping constant the total amount of air in the boiler, and combustion air distribution rate to the by changing from 42 % to 58 % of the secondary combustion zone, the combustion air amount changes hot zone into how the effect on the NOx formation amount were analyzed. The result indicates that the NOx formation has changed from 85.33 ppm to 115.61 ppm as the combustion air distribution rate changes. With this result, we are able to confirm that the combustion air distribution rate has a direct influence on NOx.; This research assessed an formation of NOx depending on a changing value of combustion air distribution rate within 1020 ㎿ static boiler, currently operating in Dangjin power plant #9. Combustion air distribution rate is 50% operation being Dangjin power plant #9 exhalation keeping constant the total amount of air in the boiler, and combustion air distribution rate to the by changing from 42 % to 58 % of the secondary combustion zone, the combustion air amount changes hot zone into how the effect on the NOx formation amount were analyzed. The result indicates that the NOx formation has changed from 85.33 ppm to 115.61 ppm as the combustion air distribution rate changes. With this result, we are able to confirm that the combustion air distribution rate has a direct influence on NOx.