• Title/Summary/Keyword: 연료희박 재연소

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Experimental Investigation of NOX Reduction using a Hybrid Fuel Lean Reburning System (NOx 저감을 위한 하이브리드 연료희박 재연소 연구)

  • Kim, Hak-Young;Baek, Seung-Wook;Hwang, Chang-Hwan
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.34 no.3
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    • pp.283-290
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    • 2010
  • The main goal of this study is to examine the use of a hybrid -fuel lean reburning system with air staging for $NO_X$ reduction. The experimental variables include the reburn fuel fraction, sizes of reburn- fuel-injection nozzles, oxygen enrichment ratio, and location of reburn- fuel- injection. The effect of the flow field induced by air- staging combustion on $NO_X$ reduction is considered, and then, the $NO_X$ reduction rate is compared with only fuel lean reburning system. On the basis of the effectiveness of each De-$NO_X$ process, the advantage of using the hybrid reburning system with air staging is determined and discussed.

Experimental Study on NOx Reduction and CO Emission by Fuel Lean Reburning Process (연료 희박 재연소 과정에 의한 NOx 저감 및 CO 발생에 대한 실험적 연구)

  • Lee, Chang-Yeop;Kim, Hak-Young;Baek, Seung-Wook;Kim, Se-Won
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.32 no.3
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    • pp.216-223
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    • 2008
  • Reburning is a useful technology in reducing nitric oxide through injection of a secondary hydrocarbon fuel. In this paper, an experimental study has been conducted to evaluate the effect of fuel lean reburning on $NO_X/CO$ reduction in LPG flame. Experiments were performed in flames stabilized by a co-flow swirl burner, which was mounted at the bottom of the furnace. Tests were conducted using LPG gas as the reburn fuel as well as the main fuel. The effects of reburn fuel fraction and injection location of the reburn fuel were studied when the fuel lean reburning system was applied. The paper reports data on flue gas emissions and temperature distribution in the furnace for a wide range of experimental conditions. At steady state, temperature distribution and emission formation in the furnace have been measured and compared. This paper makes clear that in order to decrease both NOx and CO concentrations in the exhaust when the fuel lean reburning system was adapted, it is important that the control of some factors such as initial equivalence ratio, reburn fuel fraction and temperature of reburn fuel injection region. Also it shows the fuel lean reburning is also effective method to reduce NOx as much as reburning.

Experimental and Numerical Investigation for NOx Reduction with Fuel Lean Reburning System (NOx저감을 위한 연료희박 재연소 기법의 실험 및 수치적 연구)

  • Kim, Hak-Young;Baek, Seung-Wook;Son, Hee;Kim, Se-Won
    • Journal of the Korean Society of Combustion
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    • v.14 no.2
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    • pp.18-25
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    • 2009
  • Fuel lean reburning method is very attractive way in comparison with conventional reburning method for reducing NOX. Meanwhile, the knowledge of the how flue gas re-circulated, temperature distribution and species concentration is crucial for the design and operation of an effective fuel lean reburning system. For this reason, numerical analysis of fuel lean reburning system is a very important and challenge task. In this work, the effect of fuel lean reburn system on NOX reduction has been experimentally and numerically conducted. Experimental study has been conducted with a 15kW lab scale furnace. Liquefied Petroleum Gas is used as main fuel and reburn fuel. To carry out numerical study, the finite-volume based commercial computational fluid dynamics (CFD) code FLUENT6.3 was used to simulate the reacting flow in a given laboratory furnace. Steady state, three dimensional analysis performed for turbulent reactive flow and radiative heat transfer in the furnace.

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