연료유량 제어밸브의 작동특성에 따른 로컬 당량비 변화와 연소 및 질소산화물 발생의 관계
Effect of Pulsation Characteristics of Fuel Flow on Local Equivalence Ratio, Combustion, and NOx Emission in a N ozzle- Mixed Burner
0
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
The present work investigated the NOx reduction effect that can be obtained by periodically changing the local equivalence ratio by repeatedly controlling the fuel flow. When there was no pressure pulsation of the fuel, the NOx emission was 30.3 ppm (O2 vol.11%), and the NOx emission was reduced from 4% to 30% according to the pulsation variables. Since it is difficult to directly measure the instantaneous mass and volumetric flow rate during a periodic change on a 103-millisecond scale in an industrial-scale experiment, the measured pressure was used to calculate the mass and volumetric flow rate. The fuel and air supply pressure was fixed at 700 mmH2O, and when flow pulsation occurred in the fuel pipe, the pressure was changed within the range of 150 to 694 mmH2O. As a result of calculation through the one-dimensional model, it had a local equivalence ratio range of 0.108 to 0.776. In the chemical equilibrium domain of methane, the relationship between the local equivalence ratio change and combustion products according to the operating characteristics of the fuel-flow pulsation valve was discussed
Abstract
The present work investigated the NOx reduction effect that can be obtained by periodically changing the local equivalence ratio by repeatedly controlling the fuel flow. When there was no pressure pulsation of the fuel, the NOx emission was 30.3 ppm (O2 vol.11%), and the NOx emission was reduced from 4% to 30% according to the pulsation variables. Since it is difficult to directly measure the instantaneous mass and volumetric flow rate during a periodic change on a 103-millisecond scale in an industrial-scale experiment, the measured pressure was used to calculate the mass and volumetric flow rate. The fuel and air supply pressure was fixed at 700 mmH2O, and when flow pulsation occurred in the fuel pipe, the pressure was changed within the range of 150 to 694 mmH2O. As a result of calculation through the one-dimensional model, it had a local equivalence ratio range of 0.108 to 0.776. In the chemical equilibrium domain of methane, the relationship between the local equivalence ratio change and combustion products according to the operating characteristics of the fuel-flow pulsation valve was discussed
참고문헌 (21)
- Energy green house gas total information platform service, , Ministry of Trade, Industry and Energy, ~ (2022)
- 2016 National air pollutant emissions, , National Institute of Environmental Research, ~ (2019)
- Domestic crude steel production status, , Korea Iron & Steel Association, ~ (2019)
- Future of the steel industry according to changes in air environment policy, , National Assembly Steel Forum, ~ (2018)
- Industrial impact and implications of the fine dust problem, , Korea Institute for Industrial Economics & Trade, ~ (2019)
- NOx emission by oscillating combustion, Final report of GTI project No.61111 for U.S. DOE, "J. Wagner", Gas Technology Institute, ~ (2004)
- Y. Hagihara, "Ultra-low NOx oxygen-enriched combustion system using oscillation combustion method", Energy Procedia, 120, pp.189~196 (2017)
- H. Cho, "NOx emission characteristics in radiant tube burner with oscillating combustion technology", J. Energy Power Engineering, 5, pp.105~111 (2011)
- B. Jang, "Nitric oxide emission reduction and thermal characteristics of fuel-pulsed oscillating combustion in an industrial burner system", Energy, 216, pp.119263~ (2021)
- H. McMahon, "Vortex shedding from a turbulent jet in a cross wind", J. Fluid Mech, 48, pp.73~80 (1971)
- J. Andreopoulos, "On the structure of jets in a crossflow", J. Fluid Mech, 157, pp.163~197 (1985)
- T. Fric, "Vortical structure in the wake of a transverse jet", J. Fluid Mech, 279, pp.1~47 (1994)
- Z. Moussa, "The near field in the mixing of a round jet with a cross-stream", J. Fluid Mech, 80, pp.49~80 (1977)
- R. Sykes, "On the vorticity dynamics of a turbulent jet in a cross-flow", J. Fluid Mech, 168, pp.393~413 (1986)
- R. Huang, "Coherent structure in a combusting jet in cross flow", AIAA Journal, 32, pp.1120~1125 (1994)
- R. Huang, "The stability and visualization flame and flow structure of a combusting jet in cross flow", Combust. Flame, 98, pp.267~278 (1994)
- H. Lee, "An observation of combustion behavior of a single coal particle entrained into hot gas flow", Combust. Flame, 162, pp.2610~2620 (2015)
- H. Lee, "Motion of single pulverized coal particles in a hot gas flow field", Combust. Flame, 169, pp.63~71 (2016)
- H. Lee, "Volatile flame visualization of single pulverized fuel particles", Powder Technol, 333, pp.353~363 (2018)
- GT-SUITE, "Optimization manual", Gamma Technologies, ~ (2019)