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산업용 보일러에 적용된 저 NOx 미분탄버너의 연소성능 평가
김상현(Sang- Hyeun Kim),김혁제(Hyuk-Je Kim),김혁필(Hyeuk-Pill Kim),송시홍(Si-Hong Song),이익형(Ik-hyung Lee) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.11
Increasing environmental pressures to reduce NOx emission are being placed on coal-fired boilers. To meet the environmental requirements, Doosan Heavy Industries & Construction Co., Ltd.(Doosan) has developed low NOx pulverized coal burner. Low NOx pulverized coal burner has already delivered, and it’s combustion performance was evaluated to the NOx and Unburned Carbon(UBC) during the commissioning tests. The test results are shown that the strong relationship is existed between NOx and OFA flow rate, and also fuel-N fraction of coal has effected on NOx emission.
김상현(Sang-Hyeun Kim),송시홍(Si-Hong Song),김혁제(Hyuk-Je Kim),김혁필(Hyeok-Pil Kim) 한국연소학회 2006 한국연소학회지 Vol.11 No.4
To meet the environmental requirements, Doosan Heavy Industries & Construction Co., Ltd. (Doosan) had developed low NOx pulverized coal burner and it was applied to boiler retrofit project, 130 ton/hr coal fired co-generation boiler, in 2003. NOx emissionand unburned carbon (UBC) in fly ash were measured during the commissioning tests. In this paper, the operation results of low NOx pulverized coal burner installed in 130 ton/hr coal fired boiler are presented. Burners emitted 160 ppm (@6 % O₂ basis) NOx and 3 % UBC with Chinacoal containing 0.86 % fuel nitrogen. And also it was shown that NOx emission rate of low NOx pulverized coal burner is linearly increased with fuel-nitrogen fraction of coal.
이준열,김상현,이재학 ( Jun Yull Lee,Sang Hyeun Kim,Jae Hak Lee ) 한국수학교육학회 1991 수학교육 Vol.30 No.1
Multiobjective Optimization problem involving set functions is introduced. Then an iterative algorithm for these kinds of problems is suggested and its optimal process will be proved.
Dynamic Classifier가 장착된 미분기 내부 유동 실험
이건명(Gun Myung Lee),김상현(Sang Hyeun Kim),김혁제(Hyuk Je Kim),이익형(Ik Hyung Lee),하종광(Jong Kang Ha) 대한기계학회 2001 대한기계학회 춘추학술대회 Vol.2001 No.9
Three-dimensional experimental analyses were conducted in the pulverizer simplified isothermal cold flow model. The experimental model was constructed on a 1/3.5 scale of 500㎿ pulverized coal boiler. The purpose of this study is to investigate the characteristics of flows in the pulverizer with dynamic classifier for type A and B. The results showed that an increase of dynamic classifier rpm had no effect on total pressure loss, but an increase of inlet velocity was induced that the rise of total pressure loss in the pulverizer model with dynamic classifier. Inner flow pattern around the dynamic classifier showed that type B was more uniform than type A in pulverizer model.
The Development of High Performance Flame Stability(HPFS) Tangential Coal-Fired Burner
김혁필(Hyeok-Pill Kim),김상현(Sang-Hyeun Kim),김혁제(Hyuk-Je Kim),송시홍(Si-Hong Song) 한국연소학회 2006 한국연소학회지 Vol.11 No.2
This report presents a study of the development of an advanced coal nozzle used in burners to reduce unburned carbon (UBC) in a tangential coal-fired boiler. To understand the mechanism of UBC reduction, experiments using conventional burners were carried out to evaluate the effects of air injection velocity, coal fineness and over fired air (OFA) on combustion efficiency. It was confirmed that ignition of pulverized coal particles close to the burner is helpful toward the complete bum of residual carbon in fly ash. These efforts indicated the additional results that UBC was strongly dependent on the primary air velocity and coal fineness; especially that UBC dramatically decreased when the weight fraction of pulverized coal under 75 ㎛ was over 85%. New coal nozzles, modified from conventional nozzles, were prepared and tested to improve the combustion efficiency. Some of these nozzles offered relatively lower unburned carbon than those of conventional burners and are referred to as HPFS (High Performance Flame Stability) coal nozzles.
이익형(Ik-hyung Lee),송시홍(Si Hong Song),하종광(Jong-Kwong Ha),이건명(Gun-Myung Lee),김상현(Sang-Hyeun Kim),안상택(Sang Ta Ahn),김혁제(Hyuk-Je Kim),강병구(Byong-gu kang),김혁필(Hyeuk-Pill Kim) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
저 NOx 미분탄 버너와 회전형 분리장치 미분기를 근간으로 하는 저공해 고효율 석탄 연소시스템의 기술적인 특징과 적용 사례를 소개하고자 한다. 저 NOx 미분탄 버너에는 특허를 취득한 미분탄 노즐과 유통 변수를 최적화한 air register가 장착되어 연소 중에 발생하는 fuel-NOx를 효과적으로 저감할 수 있다. 그리고 회전형 분리장치미분기애는 특허를 획득한 회전형 분리기가 장착되어 있으며, 회전형 분리기는 미분도를 향상시켜 회중 UBC의 감소 및 연소 안정화에 기여한다. 이러한 특징을 가지는 저 NOx 미분탄 버너와 회전형 분리장치 미분기를 HUVIS(주) 전주공장의 130ton/hr 보일러의 개보수공사에 적용하였다. 본 공사를 통해 회전형 미분기는 200mesh 85%이상의 미분도를 나타내었으며, 저 NOx 버너는 석탄 전소시 170ppm(@6% O2)의 NOx 배출량 특성을 나타내었다.