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Experimental and numerical investigations on NOx formation and reduction mechanisms of pulverized-coal stereo-staged combustion

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  • Zeng, Guang
  • Zhou, Anqi
  • Fu, Jinming
  • Ji, Yang

Abstract

With the gradual increase of intermittent renewable energy, the coal-fired power generating units must provide flexible peak shaving capabilities. However, the new requirement comes with increasing challenges for the pulverized coal utility boilers, as it tends to have lower combustion efficiency and higher NOx emission at extremely low loads. Accordingly, this work aims at coupling the NOx formation and reduction mechanisms with computational fluid dynamic simulation to thoroughly explore the technology for NOx abatement. The effect of the different primary air equivalence ratios on the Whitehaven bituminous combustion was experimentally and numerically studied. The combustion experiments were performed in a down-fired facility. Moreover, the numerical model validated well with the experimental results. The results reveal that, by reducing the primary air equivalence ratio, the combustion efficiency of pulverized coal stereo-staged combustion increased. Furthermore, the formation and reduction rate of fuel-NOx by HCN decreased but those by NH3 slightly increased. In addition, the fuel-NOx reaction rates from char-nitrogen decreased. The NH3 was oxidized to NOx, while HCN mainly played the role of reducing NOx. The primary air equivalence ratio of 0.24–0.28 was found to be the optimal range for the pulverized coal stereo-staged combustion technology.

Suggested Citation

  • Zeng, Guang & Zhou, Anqi & Fu, Jinming & Ji, Yang, 2022. "Experimental and numerical investigations on NOx formation and reduction mechanisms of pulverized-coal stereo-staged combustion," Energy, Elsevier, vol. 261(PB).
    • Handle: RePEc:eee:energy:v:261:y:2022:i:pb:s036054422202240x
    DOI: 10.1016/j.energy.2022.125358
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    as
    1. Liang, Zhanwei & Chen, Hongwei & Zhao, Bin & Jia, Jiandong & Cheng, Kai, 2018. "Synergetic effects of firing gases/coal blends and adopting deep air staging on combustion characteristics," Applied Energy, Elsevier, vol. 228(C), pages 499-511.
    2. Liu, Yacheng & Fan, Weidong & Li, Yu, 2016. "Numerical investigation of air-staged combustion emphasizing char gasification and gas temperature deviation in a large-scale, tangentially fired pulverized-coal boiler," Applied Energy, Elsevier, vol. 177(C), pages 323-334.
    3. Zhou, Anqi & Xu, Hongpeng & Xu, Mingchen & Yu, Wenbin & Li, Zhenwei & Yang, Wenming, 2020. "Numerical investigation of biomass co-combustion with methane for NOx reduction," Energy, Elsevier, vol. 194(C).
    4. Choi, Minsung & Park, Yeseul & Li, Xinzhuo & Kim, Kibeom & Sung, Yonmo & Hwang, Taegam & Choi, Gyungmin, 2021. "Numerical evaluation of pulverized coal swirling flames and NOx emissions in a coal-fired boiler: Effects of co- and counter-swirling flames and coal injection modes," Energy, Elsevier, vol. 217(C).
    5. Hong, Feng & Chen, Jiyu & Wang, Rui & Long, Dongteng & Yu, Haoyang & Gao, Mingming, 2021. "Realization and performance evaluation for long-term low-load operation of a CFB boiler unit," Energy, Elsevier, vol. 214(C).
    6. Kang, Yinhu & Wang, Quanhai & Lu, Xiaofeng & Wan, Hu & Ji, Xuanyu & Wang, Hu & Guo, Qiang & Yan, Jin & Zhou, Jinliang, 2015. "Experimental and numerical study on NOx and CO emission characteristics of dimethyl ether/air jet diffusion flame," Applied Energy, Elsevier, vol. 149(C), pages 204-224.
    7. Li, Xiaoguang & Zeng, Lingyan & Zhang, Ning & Zhang, Xin & Song, Minhang & Chen, Zhichao & Li, Zhengqi, 2022. "Effects of the gas/particle flow and combustion characteristics on water-wall temperature and energy conversion in a supercritical down-fired boiler at different secondary-air distributions," Energy, Elsevier, vol. 238(PC).
    8. Wang, Feifei & Li, Pengfei & Mi, Jianchun & Wang, Jinbo, 2018. "A refined global reaction mechanism for modeling coal combustion under moderate or intense low-oxygen dilution condition," Energy, Elsevier, vol. 157(C), pages 764-777.
    9. Li, Zixiang & Qiao, Xinqi & Miao, Zhengqing, 2021. "Low load performance of tangentially-fired boiler with annularly combined multiple airflows," Energy, Elsevier, vol. 224(C).
    10. Zhang, Zhiguo & Zhao, Dan & Ni, Siliang & Sun, Yuze & Wang, Bing & Chen, Yong & Li, Guoneng & Li, S., 2019. "Experimental characterizing combustion emissions and thermodynamic properties of a thermoacoustic swirl combustor," Applied Energy, Elsevier, vol. 235(C), pages 463-472.
    11. Wang, Qingxiang & Chen, Zhichao & Han, Hui & Zeng, Lingyan & Li, Zhengqi, 2019. "Experimental characterization of anthracite combustion and NOx emission for a 300-MWe down-fired boiler with a novel combustion system: Influence of primary and vent air distributions," Applied Energy, Elsevier, vol. 238(C), pages 1551-1562.
    12. 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.
    13. Świątkowski, Bartosz & Marek, Ewa, 2015. "Optimisation of pulverized coal combustion in O2/CO2/H2O modified atmosphere – Experimental and numerical study," Energy, Elsevier, vol. 92(P1), pages 47-53.
    14. 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).
    15. Mao, Zhihui & Zhang, Liqi & Zhu, Xinyang & Pan, Cong & Yi, Baojun & Zheng, Chuguang, 2016. "Modeling of an oxy-coal flame under a steam-rich atmosphere," Applied Energy, Elsevier, vol. 161(C), pages 112-123.
    16. Tu, Yaojie & Zhou, Anqi & Xu, Mingchen & Yang, Wenming & Siah, Keng Boon & Subbaiah, Prabakaran, 2018. "NOX reduction in a 40 t/h biomass fired grate boiler using internal flue gas recirculation technology," Applied Energy, Elsevier, vol. 220(C), pages 962-973.
    17. Wang, Qingxiang & Chen, Zhichao & Wang, Jiaquan & Zeng, Lingyan & Zhang, Xin & Li, Xiaoguang & Li, Zhengqi, 2018. "Effects of secondary air distribution in primary combustion zone on combustion and NOx emissions of a large-scale down-fired boiler with air staging," Energy, Elsevier, vol. 165(PB), pages 399-410.
    18. Han, Yu & Sun, Yingying, 2020. "Collaborative optimization of energy conversion and NOx removal in boiler cold-end of coal-fired power plants based on waste heat recovery of flue gas and sensible heat utilization of extraction steam," Energy, Elsevier, vol. 207(C).
    19. Chen, Chih-Jung & Hung, Chen-I. & Chen, Wei-Hsin, 2012. "Numerical investigation on performance of coal gasification under various injection patterns in an entrained flow gasifier," Applied Energy, Elsevier, vol. 100(C), pages 218-228.
    20. Bogdanov, Dmitrii & Ram, Manish & Aghahosseini, Arman & Gulagi, Ashish & Oyewo, Ayobami Solomon & Child, Michael & Caldera, Upeksha & Sadovskaia, Kristina & Farfan, Javier & De Souza Noel Simas Barbos, 2021. "Low-cost renewable electricity as the key driver of the global energy transition towards sustainability," Energy, Elsevier, vol. 227(C).
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