Effect of different inner secondary-air vane angles on combustion characteristics of primary combustion zone for a down-fired 300-MWe utility boiler with overfire air
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- 作者：Qingxiang Wang ; Zhichao Chen ; chenzc@hit.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Miaomiao Che ; Lingyan Zeng ; Zhengqi Li ; Minhang Song
- 关键词：Down-fired boiler ; Swirl burner ; Vane angles ; Overfire air ; Pulverized coal combustion ; NOx emissions
- 刊名：Applied Energy
- 出版年：2016
- 出版时间：15 November 2016
- 年：2016
- 卷：182
- 期：Complete
- 页码：29-38
- 全文大小：783 K
文摘
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Industrial experiments were performed on a 300-MWe B&W down-fired boiler with OFA.
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The Influence of different inner secondary-air vane angles was investigated.
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The ignition distance of coal/air flow is significantly reduced after the retrofit.
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The fullness of coal flame in the furnace for different vane angles was determined.
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Considering the NOx emissions and the burnout rate, a vane angle of 35° is optimal.