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Numerical study of fly ash deposition process in low temperature economizer under SCR conditions

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Abstract

After the boiler of a thermal power plant in Nanjing was reformed for denitrification, the clogging of fly ash particles occurred near the support beam of the economizer. The critical speed criterion under different working conditions was constructed by Fluent custom code (UDF), and the change of fly ash deposition on the support beam of the economizer was simulated without ABS and with ABS. At the same time, the influence of the fin layout structure on the movement of smoke and fly ash particles was analyzed. The results show that the stagnation of fly ash particles on the supporting beam is the main cause of sediment clogging. Due to the production of ABS in the process of denitrification, the adhesion of fly ash particles is intensified. At the same time, the fin structure on the support beam hinders the lateral movement of fly ash particles, which causes the growth of clogged fly ash near the support plate. On this basis, an optimization plan for the fin structure is proposed, which improves the flue gas flow conditions and avoids the occurrence of clogging and growth of fly ash.

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Abbreviations

ucr :

critical deposition rate [m/s]

E:

composite Young’s modulus [N/m2]

Ep :

Youngs modulus of particles [N/m2]

Em :

Young’s modulus of the deposited surface [N/m2]

Tin :

inlet temperature [K]

Tw :

tube wall temperature [K]

Pr:

Prandtl Number

Prw :

Wall Prandtl Number

FD :

drag force[N]

FA :

additional power [N]

dp :

particle diameter [mm]

v m :

deposited surface poisson ratio

v p :

particle poisson’s ratio

z:

number of tube rows

U:

gas phase velocity [m/s]

Up :

particle phase velocity [m/s]

CD :

resistancefactor

Rep :

particle phase Reynolds number

Re:

gas phase Reynolds number

ν:

power viscosity [m2/s]

ρ p :

particle phasedensity[kg/m3

ρ :

gas phase density [kg/m3]

f:

coefficient of friction

References

  1. C. J. Tsai, J. S. Lin, S. G. Aggarwal and D. R Chen, Aerosol Sci. Tech., 38, 131 (2004).

    Article  CAS  Google Scholar 

  2. Y. Shi, H. Shu, Y. Zhang, H. Fan, Y. Zhang and L. Yang, Fuel Process. Technol., 150, 141 (2016).

    Article  CAS  Google Scholar 

  3. Y. Wang, H. Tan, K. Dong, H. Liu, J. Xiao and J. Zhang, Appl. Therm. Eng., 118, 283 (2017).

    Article  CAS  Google Scholar 

  4. B. E. Lee, C. A. J. Fletcher, S. H. Shin and S. B. Kwon, Fuel, 81, 2001 (2002).

    Article  CAS  Google Scholar 

  5. Z. Zheng, W. Yang, H. Wang, A. Zhou, Y. Cai, G. Zeng and H. Xu, Energy, 220, 119699 (2021).

    Article  Google Scholar 

  6. H. Han, Y. He, W. Tao and Y. Li, Int. J. Heat Mass Tran., 72, 210 (2014).

    Article  Google Scholar 

  7. H. Lu, L. Lu and Y. Jiang, Appl. Therm. Eng., 110, 150 (2017).

    Article  Google Scholar 

  8. L. Mu, L. Zhao and H. Yin, Appl. Therm. Eng., 44, 57 (2012).

    Article  CAS  Google Scholar 

  9. W. Hong and X. Wang, Korean J. Chem. Eng., 35, 1517 (2018).

    Article  CAS  Google Scholar 

  10. L. Mu, S. Wang, Z. Zhai, Y. Shang, C. Zhao, L. Zhao and H. Yin, J. Energy Inst., 93, 1481 (2020).

    Article  CAS  Google Scholar 

  11. F. Wang, Y. He, S. Tang and Z. Tong, Int. J. Heat Mass Tran., 112, 367 (2017).

    Article  Google Scholar 

  12. Y. Cai, K. Tay, Z. Zheng, W. Yang, H. Wang, G. Zeng, Z. Li, S. K. Boon and P. Subbaiah, Appl. Energ., 230, 1447 (2018).

    Article  CAS  Google Scholar 

  13. M. Walsh Peter, N. Sayre Alan, O. Loehden David, S. Monroe Larry, M. Beér János and F. Sarofim Adel, Prog. Energy Combust. Sci., 16, 327 (1990).

    Article  Google Scholar 

  14. A. Brink, D. Lindberg, M. Hupa, M. E. de Tejada, M. Paneru and J. Maier, Fuel Process. Technol., 141, 210 (2016).

    Article  CAS  Google Scholar 

  15. H. Han, Y. He, W. Tao and Y. Li, Int. J. Heat Mass Tran., 72, 210 (2014).

    Article  Google Scholar 

  16. A. G. Konstandopoulos, J. Aerosol Sci., 37, 292 (2006).

    Article  CAS  Google Scholar 

  17. H. El-Batsh and H. Haselbacher, ASME Paper. GT-2002-30600 (2002).

  18. C. Toscano and G. Ahmadi, J. Adhesion, 79, 175 (2010).

    Article  Google Scholar 

  19. Y. Pan, F. Si, Z. Xu and C. E. Romero, Powder Technol., 210, 150 (2011).

    Article  CAS  Google Scholar 

  20. F. Wang, Y. He, Z. Tong and S. Tang, Int. J. Heat Mass Tran., 104, 774 (2017).

    Article  CAS  Google Scholar 

  21. S. Tang, F. Wang, Q. Ren and Y. He, Fuel, 203, 725 (2017).

    Article  CAS  Google Scholar 

  22. Z. Zhang and Q. Chen, Atmos. Environ., 43, 319 (2008).

    Article  Google Scholar 

  23. K. Sun, Indoor Built Environ., 20, 300 (2011).

    Article  Google Scholar 

  24. H. Jiang, L. Lu and K. Sun, Build. Environ., 45, 1184 (2009).

    Article  Google Scholar 

  25. M. Luo, L. Zhao and S. Li, J. Chin. Soc. Power Eng., 36, 883 (2016).

    CAS  Google Scholar 

  26. R. M Brach and P. F. Dunn, Aerosol Sci. Tech., 16, 51 (1992).

    Article  CAS  Google Scholar 

  27. F. Wang, Y. He, S. Tang and Z. Tong, Chinese Sci. Bull., 62, 1292 (2017).

    Article  Google Scholar 

  28. R. Israel and D. E. Rosner, Aerosol Sci. Tech., 2, 45 (1982).

    Article  Google Scholar 

  29. A. A. Žukauskas and R. V. Ulinskas, Heat Tran. Eng., 6, 19 (1985).

    Article  Google Scholar 

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Acknowledgements

This work was supported by Postgraduate Research & Practice Innovation Program of Jiangsu Province (Grant No. KYCX21_2811), Natural Science Research Project of Jiangsu Higher Education Institutions (Grant No. 20KJA470001).

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Authors and Affiliations

  1. School of Mechanical Engineering, Changzhou University, Changzhou, 213164, China

    Shuangcheng Fu, Gang Cao, Guofu Ou, Faqi Zhou & Luyu Li

  2. Jiangsu Key Laboratory of Green Process Equipment, Changzhou, Changzhou, 213164, China

    Shuangcheng Fu, Gang Cao, Guofu Ou, Faqi Zhou & Luyu Li

Authors
  1. Shuangcheng Fu
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  2. Gang Cao
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  3. Guofu Ou
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  4. Faqi Zhou
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  5. Luyu Li
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Correspondence to Faqi Zhou.

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Fu, S., Cao, G., Ou, G. et al. Numerical study of fly ash deposition process in low temperature economizer under SCR conditions. Korean J. Chem. Eng. 39, 1717–1728 (2022). https://doi.org/10.1007/s11814-022-1066-7

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  • DOI: https://doi.org/10.1007/s11814-022-1066-7

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