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首页> 外文会议>Challenges of Power Engineering and Environment >Experimental Study of Hybrid Reburning and SNCR Process for NOx Reduction in Various Oxygen-Enriched LPG Flame
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Experimental Study of Hybrid Reburning and SNCR Process for NOx Reduction in Various Oxygen-Enriched LPG Flame

机译：混合富氧和SNCR工艺在多种富氧液化石油气火焰中还原NOx的实验研究

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摘要

In order to enhance combustion efficiency, oxygen-enriched combustion is used by increasing the oxygen ratio in the oxidizer. However, since the flame temperature becomes too high, NOx formation in the furnace seriously increases. In this case reburning and selective non-catalytic reaction (SNCR) are useful technologies in reducing nitric oxide. In the reburning process, nitric oxide is diminished through injection of a secondary hydrocarbon fuel. Also, SNCR reduce the nitric oxide through injection of one or more chemical agents such as ammonia and urea solution. In this paper, an experimental study has been conducted to evaluate the hybrid effects of reburning and selective non-catalytic reaction on NOx reduction and also to examine heat transfer characteristics from various oxygen-enriched 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 main fuel and also as reburning fuel. The effects of reburning fuel fraction, SNCR agent fraction and injecting location of SNCR agent were studied. The effect of oxygen enrichment ratio was also tested. The paper reported data on flue gas emissions, temperature distribution in furnace and various heat fluxes at the wall for a wide range of experimental conditions. In a steady state, the total as well as radiative heat flux from the flame to the wall of furnace has been measured using a heat flux meter. Temperature distribution and emission formation in furnace have also been measured and compared. NOx generation was observed to increase as increasing oxygen enrichment ratio, but due to its hybrid effects of reburning and SNCR, NOx concentration in the downstream has considerably decreased.
机译：为了提高燃烧效率，通过增加氧化剂中的氧比率来使用富氧燃烧。然而，由于火焰温度变得太高，炉中NOx的形成严重增加。在这种情况下，再燃和选择性非催化反应（SNCR）是减少一氧化氮的有用技术。在再燃烧过程中，通过注入二次烃燃料来减少一氧化氮。而且，SNCR通过注入一种或多种化学试剂（例如氨水和尿素溶液）来还原一氧化氮。在本文中，进行了一项实验研究，以评估再燃烧和选择性非催化反应对NOx还原的混合效应，并研究各种富氧LPG火焰的传热特性。在安装在炉膛底部的并流旋流燃烧器稳定的火焰中进行了实验。使用液化石油气作为主要燃料和再燃燃料进行了测试。研究了再燃燃料分数，SNCR剂分数和SNCR剂喷射位置的影响。还测试了氧气富集率的影响。该论文报道了各种实验条件下的烟气排放，炉内温度分布以及壁上各种热通量的数据。在稳态下，已经使用热通量计测量了从火焰到炉壁的总热通量和辐射热通量。还测量并比较了炉中的温度分布和排放物形成。观察到NOx的产生随着氧气富集率的增加而增加，但是由于其再燃和SNCR的混合效应，下游的NOx浓度已大大降低。

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  • 会议地点 Hangzhou(CN)
  • 作者

    rn; rn;

  • 作者单位

    Chang Yeop LEE@Department of Aerospace Engineering, School of Mechanical, Aerospace Systems Engineering,Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea--Seung Wook BAEK@Department of Aerospace Engineering, School of Mechanical, Aerospace Systems Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea--;

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  • 中图分类 输配电工程、电力网及电力系统;
  • 关键词

    Reburn; SNCR; Hybrid reburning; Nox;

    机译：重燃; SNCR;混合重燃; Nox;

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