马兆耀,张向宇,文海南,刘雯,王志超,余波

• 1:西安热工研究院有限公司
• 2:中国矿业大学低碳能源与动力工程学院
• 3:华能(天津)煤气化发电有限公司

摘要(Abstract)：

燃煤掺氨燃烧是实现煤电机组减碳的重要路径之一，为进一步探究高比例掺氨燃烧的可行性，建立了氨煤混燃的机理模型，采用计算流体动力学（CFD）模拟计算了4 MW机组锅炉氨煤混燃及纯氨燃烧过程，CFD计算结果与试验数据误差小于3%。试验结果表明：氨煤混燃时，氨掺烧比例每提高20%，火焰温度下降约30℃，二氧化碳体积分数降低约20%；当掺氨比例从0增加到40%时，炉膛出口NO质量浓度增加约77.33%，飞灰含碳量由4.65%增加至6.16%；氨掺烧比例从0增加到60%时NO质量浓度增加约136.44%；氨煤混燃时过量空气系数选择1.15，燃尽性和氮氧化物生成达到最优；氨燃料分两级投入方式相比于不分级方式能够使炉膛出口NO体积分数降低31.07%；与煤粉和氨煤混燃火焰相比，纯氨燃烧时火焰温度低，着火距离长且切圆直径较大，纯氨燃烧时炉膛出口NO质量浓度为475 mg/m~3，逃逸氨量接近于0。

关键词(KeyWords)： 燃煤锅炉;氨燃烧;氮氧化物;氨逃逸;燃料分级

Abstract:

Keywords:

基金项目(Foundation): 陕西省重点研发计划一般项目（2024GX-YBXM-458）~~

作者(Author): 马兆耀,张向宇,文海南,刘雯,王志超,余波

DOI: 10.19666/j.rlfd.202409213

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