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Experimental study of flue gas condensing heat recovery synergized with low NOx emission system

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  • Zhang, Qunli
  • Niu, Yu
  • Yang, Xiaohu
  • Sun, Donghan
  • Xiao, Xin
  • Shen, Qi
  • Wang, Gang

Abstract

To improve overall thermal efficiency while simultaneously reducing the NOx emissions of gas boilers, a novel flue gas condensation heat recovery and low NOx emission system that integrates a direct contact heat exchange unit with a combustion air humidification unit is proposed. A well-designed experimental system was established and a test bench was set up to study the effects of variable multi-factor operating conditions on the waste heat recovery and NOx emission properties. The synergistic enhancement principle between the flue gas waste heat recovery process and low nitrogen emission is described in detail. The dew point temperature of the flue gas is improved significantly by humidifying the combustion air, which contributes to both low nitrogen emission and full waste heat recovery. The experimental results show that when the combustion air humidity ratio increased from the zero-humidification condition to 49.0 g/kgdry air, the dew point temperature of the flue gas increased by 6.4 °C. At a spray water flow rate of 0.83 m3/h and with a heat supply network return water temperature of 45 °C, the flue gas waste heat recovery efficiency and the waste heat utilization efficiency of the heat supply network increased by up to 12.2% and 6.9%, respectively, and the average NOx emissions decreased to 50.0 mg/m3. In the NE mode, with a spray water flow rate of 1.03 m3/h, the combustion air humidity ratio is increased to 101.2 g/kgdry air, the NOx emission reduction procedure is more effective and can be reduced to 23.3 mg/m3. The experimental system offers advantages in terms of energy savings, environmental protection, and economic benefits, and also outperforms other competing systems with respect to these issues.

Suggested Citation

  • Zhang, Qunli & Niu, Yu & Yang, Xiaohu & Sun, Donghan & Xiao, Xin & Shen, Qi & Wang, Gang, 2020. "Experimental study of flue gas condensing heat recovery synergized with low NOx emission system," Applied Energy, Elsevier, vol. 269(C).
    • Handle: RePEc:eee:appene:v:269:y:2020:i:c:s0306261920306036
    DOI: 10.1016/j.apenergy.2020.115091
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    References listed on IDEAS

    as
    1. Wei, Maolin & Zhao, Xiling & Fu, Lin & Zhang, Shigang, 2017. "Performance study and application of new coal-fired boiler flue gas heat recovery system," Applied Energy, Elsevier, vol. 188(C), pages 121-129.
    2. Jiménez-Arreola, Manuel & Pili, Roberto & Wieland, Christoph & Romagnoli, Alessandro, 2018. "Analysis and comparison of dynamic behavior of heat exchangers for direct evaporation in ORC waste heat recovery applications from fluctuating sources," Applied Energy, Elsevier, vol. 216(C), pages 724-740.
    3. Firth, Anton & Zhang, Bo & Yang, Aidong, 2019. "Quantification of global waste heat and its environmental effects," Applied Energy, Elsevier, vol. 235(C), pages 1314-1334.
    4. Chen, Zhichao & Wang, Qingxiang & Zhang, Xiaoyan & Zeng, Lingyan & Zhang, Xin & He, Tao & Liu, Tao & Li, Zhengqi, 2017. "Industrial-scale investigations of anthracite combustion characteristics and NOx emissions in a retrofitted 300 MWe down-fired utility boiler with swirl burners," Applied Energy, Elsevier, vol. 202(C), pages 169-177.
    5. Barma, M.C. & Saidur, R. & Rahman, S.M.A. & Allouhi, A. & Akash, B.A. & Sait, Sadiq M., 2017. "A review on boilers energy use, energy savings, and emissions reductions," Renewable and Sustainable Energy Reviews, Elsevier, vol. 79(C), pages 970-983.
    6. Wang, Qingxiang & Chen, Zhichao & Wang, Liang & Zeng, Lingyan & Li, Zhengqi, 2018. "Application of eccentric-swirl-secondary-air combustion technology for high-efficiency and low-NOx performance on a large-scale down-fired boiler with swirl burners," Applied Energy, Elsevier, vol. 223(C), pages 358-368.
    7. Jiang, Kaiqi & Yu, Hai & Chen, Linghong & Fang, Mengxiang & Azzi, Merched & Cottrell, Aaron & Li, Kangkang, 2020. "An advanced, ammonia-based combined NOx/SOx/CO2 emission control process towards a low-cost, clean coal technology," Applied Energy, Elsevier, vol. 260(C).
    8. Lee, Seungro & Kum, Sung-Min & Lee, Chang-Eon, 2011. "An experimental study of a cylindrical multi-hole premixed burner for the development of a condensing gas boiler," Energy, Elsevier, vol. 36(7), pages 4150-4157.
    9. 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.
    10. Li, Yuzhong & Yan, Min & Zhang, Liqiang & Chen, Guifang & Cui, Lin & Song, Zhanlong & Chang, Jingcai & Ma, Chunyuan, 2016. "Method of flash evaporation and condensation – heat pump for deep cooling of coal-fired power plant flue gas: Latent heat and water recovery," Applied Energy, Elsevier, vol. 172(C), pages 107-117.
    11. Chen, Zhichao & Wang, Qingxiang & Wang, Bingnan & Zeng, Lingyan & Che, Miaomiao & Zhang, Xin & Li, Zhengqi, 2017. "Anthracite combustion characteristics and NOx formation of a 300MWe down-fired boiler with swirl burners at different loads after the implementation of a new combustion system," Applied Energy, Elsevier, vol. 189(C), pages 133-141.
    12. Gunarathne, Duleeka Sandamali & Mellin, Pelle & Yang, Weihong & Pettersson, Magnus & Ljunggren, Rolf, 2016. "Performance of an effectively integrated biomass multi-stage gasification system and a steel industry heat treatment furnace," Applied Energy, Elsevier, vol. 170(C), pages 353-361.
    13. Shang, Sheng & Li, Xianting & Chen, Wei & Wang, Baolong & Shi, Wenxing, 2017. "A total heat recovery system between the flue gas and oxidizing air of a gas-fired boiler using a non-contact total heat exchanger," Applied Energy, Elsevier, vol. 207(C), pages 613-623.
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    3. Huang, Ransisi & Mahvi, Allison & James, Nelson & Kozubal, Eric & Woods, Jason, 2024. "Evaluation of phase change thermal storage in a cascade heat pump," Applied Energy, Elsevier, vol. 359(C).
    4. Lianbo Mu & Suilin Wang & Guichang Liu & Junhui Lu & Yuncheng Lan & Liqiu Zhao & Jincheng Liu, 2023. "On-Site Experimental Study on Low-Temperature Deep Waste Heat Recovery of Actual Flue Gas from the Reformer of Hydrogen Production," Sustainability, MDPI, vol. 15(12), pages 1-19, June.

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