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Particle sticking behavior near the throat of a low-NOx axial-swirl coal burner

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  • Li, Zhengqi
  • Zeng, Lingyan
  • Zhao, Guangbo
  • Shen, Shanping
  • Zhang, Fucheng

Abstract

The results of numerical simulations of particle sticking behavior near the throat of a low-NOx axial-swirl burner in a 600-MWe bituminous coal burned boiler are presented. A comparison of simulation results with measurements using a probe with hot-film sensors shows that the numerical model offers a reasonable description. Calculated results of slagging show that slag build-up is substantial near the throat of the designed burner and that the sticking-particle ratio is as much as 33.2%. Because central and primary air streams remain unchanged, the mass flux of the inner secondary air is 3.25 kg s-1 while that of the outer secondary air is 12.16 kg s-1; however, the sticking-particle ratio can still be lowered to as little as 9.6%. By adjusting the outer secondary air blade angle to 15°, the sticking-particle ratio can be further lowered to 8.73%.

Suggested Citation

  • Li, Zhengqi & Zeng, Lingyan & Zhao, Guangbo & Shen, Shanping & Zhang, Fucheng, 2011. "Particle sticking behavior near the throat of a low-NOx axial-swirl coal burner," Applied Energy, Elsevier, vol. 88(3), pages 650-658, March.
    • Handle: RePEc:eee:appene:v:88:y:2011:i:3:p:650-658
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    References listed on IDEAS

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    2. Wang, Qingxiang & Chen, Zhichao & Che, Miaomiao & Zeng, Lingyan & Li, Zhengqi & Song, Minhang, 2016. "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," Applied Energy, Elsevier, vol. 182(C), pages 29-38.
    3. Zeng, Guang & Xu, Mingchen & Tu, Yaojie & Li, Zhenwei & Cai, Yongtie & Zheng, Zhimin & Tay, Kunlin & Yang, Wenming, 2020. "Influences of initial coal concentration on ignition behaviors of low-NOx bias combustion technology," Applied Energy, Elsevier, vol. 278(C).
    4. Yuan, Zhenhua & Chen, Zhichao & Zhang, Bo & Gao, Xuelin & Li, Jiawei & Qiao, Yanyu & Li, Zhengqi, 2023. "Study on the slagging trends of the pre-combustion chamber in industrial pulverized coal boiler under different excess air coefficients by CFD numerical simulation," Energy, Elsevier, vol. 264(C).
    5. Chen, Zhichao & Yuan, Zhenhua & Zhang, Bo & Qiao, Yanyu & Li, Jiawei & Zeng, Lingyan & Li, Zhengqi, 2022. "Effect of secondary air mass flow rate ratio on the slagging characteristics of the pre-combustion chamber in industrial pulverized coal-fired boiler," Energy, Elsevier, vol. 251(C).
    6. Zhu, Shujun & Hui, Jicheng & Lyu, Qinggang & Ouyang, Ziqu & Zeng, Xiongwei & Zhu, Jianguo & Liu, Jingzhang & Cao, Xiaoyang & Zhang, Xiaoyu & Ding, Hongliang & Liu, Yuhua, 2023. "Experimental study on pulverized coal swirl-opposed combustion preheated by a circulating fluidized bed. Part A. Wide-load operation and low-NOx emission characteristics," Energy, Elsevier, vol. 284(C).
    7. Zhong, Yu-Xiu & Wang, Xin & Xu, Gang & Ning, Xinyu & Zhou, Lin & Tang, Wen & Wang, Ming-Hao & Wang, Tong & Xu, Jun & Jiang, Long & Wang, Yi & Su, Sheng & Hu, Song & Xiang, Jun, 2023. "Investigation on slagging and high-temperature corrosion prevention and control of a 1000 MW ultra supercritical double tangentially fired boiler," Energy, Elsevier, vol. 275(C).
    8. Wieland, Christoph & Kreutzkam, Benjamin & Balan, Gundula & Spliethoff, Hartmut, 2012. "Evaluation, comparison and validation of deposition criteria for numerical simulation of slagging," Applied Energy, Elsevier, vol. 93(C), pages 184-192.
    9. Ti, Shuguang & Chen, Zhichao & Li, Zhengqi & Kuang, Min & Xu, Guangyin & Lai, Jinping & Wang, Zhenfeng, 2018. "Influence of primary air cone length on combustion characteristics and NOx emissions of a swirl burner from a 0.5 MW pulverized coal-fired furnace with air staging," Applied Energy, Elsevier, vol. 211(C), pages 1179-1189.
    10. Yuan, Zhenhua & Chen, Zhichao & Bian, Liguo & Wu, Xiaolan & Zhang, Bo & Li, Jiawei & Qiao, Yanyu & Li, Zhengqi, 2023. "Influence of blade angle in the outer secondary air for swirl burner on the flow, combustion, and slagging characteristics in the pre-combustion chamber under the air-staged condition," Energy, Elsevier, vol. 275(C).

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