경유 화염에서 왕겨를 이용한 바이오매스 재연소의 NOx 저감 효과
The Effect of Biomass Reburning with Rice Husk on NOx Reduction in Light Oil Flame
1
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
Reburning is one of the most useful technologies for reducing nitric oxide in economically and technically. The reburning process was demonstrated as an effective NOx reduction method through injection of a secondary hydrocarbon fuel. An experimental study has been conducted to evaluate the effect of biomass reburning on NOx and CO formation in a light oil flamed combustion furnace. Reburning tests on NOx reduction of air-carried rice husk powder as the reburn fuel and light oil as the main fuel were performed in flames stabilized by a co-flow swirl and fuel staged burner, which was mounted at the front of the furnace. The results included flue gas emissions and temperature distribution in the furnace for several kinds of experimental conditions. It was observed clearly that NOx concentrations in the exhaust have considerably decreased due to effect of biomass reburning. The maximum NOx reduction rate was 42% when the reburn fuel fraction was 0.18. The CO emissions were kept under 42 ppmv in all experimental tests. And this paper makes clear that in order to decrease NOx concentration in the exhaust when the biomass reburning system is adapted, the control of some factors such as reburn fuel fraction and reburn zone fraction is very important.
Abstract
Reburning is one of the most useful technologies for reducing nitric oxide in economically and technically. The reburning process was demonstrated as an effective NOx reduction method through injection of a secondary hydrocarbon fuel. An experimental study has been conducted to evaluate the effect of biomass reburning on NOx and CO formation in a light oil flamed combustion furnace. Reburning tests on NOx reduction of air-carried rice husk powder as the reburn fuel and light oil as the main fuel were performed in flames stabilized by a co-flow swirl and fuel staged burner, which was mounted at the front of the furnace. The results included flue gas emissions and temperature distribution in the furnace for several kinds of experimental conditions. It was observed clearly that NOx concentrations in the exhaust have considerably decreased due to effect of biomass reburning. The maximum NOx reduction rate was 42% when the reburn fuel fraction was 0.18. The CO emissions were kept under 42 ppmv in all experimental tests. And this paper makes clear that in order to decrease NOx concentration in the exhaust when the biomass reburning system is adapted, the control of some factors such as reburn fuel fraction and reburn zone fraction is very important.
참고문헌 (13)
- Lyon, R. K., "Thermal DeNOx: Controlling Nitrogen Oxides Emissions by a Noncatalytic Process", Environ. Sci. Tech., 21(3), pp.231~236 (1987)
- Miller, J. A., "Theory and Modeling in Combustion Chemistry" (1996), Proc. Combust. Instit.
- Proc. of the 1982 Joint Symposium on Stationary NOx Control, "Takahashi, Y.", July, ~, pp.EPRI Report No. CS-3182 (1983)
- Folsom, B. A., "Three Gas Reburning Field Evaluations - Final Results and Long Term Performance", EPRI, 1995, ~
- Lee, C. Y., "Effects of Reburning on Heat Transfer Characteristics and NOx Reduction", Trans. of the KOSCO, 10(2), pp.18~25 (2006)
- Brouwer, J., "Co-firing Waste Biofuels and Coal for Emissions Reduction", Proceedings of the Second Biomass Conference of the Americas: Energy, Environment, Agriculture, and Industry, National Renewable Energy Laboratory, pp.390~399 (1995)
- Brouwer, J., "The Use of Wood as a Reburning Fuel in Combustion Systems", Proceedings of the Sixth National Bioenergy Conference, Bioenergy '94, 통권 : 1, pp.123~130 (1994)
- Duan, J., "Effect of Biomass Gasification Tar on NO Reduction by Biogas Reburning", Energy & Fuels, 21, pp.1511~1516 (2007)
- Carlin, N. T., "The Economics of Reburning with Cattle Manure-Based Biomass in Existing Coal-Fired Power Plants for NOx and CO2 Emissions Control", Biomass and Bioenergy, 33, pp.1139~1157 (2009)
- Gupta, A. K., "Swirl Flows" (1984), ABACUS PRESS
- Drake, M. C., "Supereqilibrium Thermal Nitric Oxide Formation in Turbulent Diffusion Flames,”", Combustion and Flame, 69, pp.347~365 (1987)
- Holman, J. P., "Experimental Methods for Engineers" (2001), McGraw-Hill
- Burch, T. E., "Partitioning of Nitrogenous Species in the Fuel Rich Stage of Reburning", Energy and Fuels, 5, pp.231~237 (1991)