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Combustion and NOx Emission Characteristics of Coal Slime Solid Waste at Different Feeding Positions

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Abstract

The NOx emission of coal slime burned in circulating fluidized bed (CFB) boilers could hardly meet the increasingly strict standards in China. Feeding coal slime from the top of furnace led to uneven combustion in furnace and cyclones, short residence time and overheated tail heating surface. The effects of feeding positions on the combustion uniformity and pollutant emission characteristics of coal slime were studied. The experimental results showed that the coal slime combustion was more uniform when feeding from the front wall and longer residence time was conducive to the control of NOx emission. When the boiler temperature and excess air ratio were almost identical, the initial NOx emissions were 45.0 mg·m−3 and 70.7 mg·m−3 when feeding from the front wall and the top of furnace, respectively; the NOx emission was cut down 36.35% when feeding from the front wall, successfully meeting the ultra-low NOx emission standard of China. The adoption of feeding from the front wall greatly reduced the original emission of NOx; the operation costs in the practical applications were saved to a large extent.

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References

  1. Zhao X.M., Qiao Z., Shao G., et al., Suction characteristics of a thick material pump at high concentrations of coal slime. International Journal of Mining Science and Technology, 2008, 18(2): 210–213.

    Google Scholar 

  2. Liu H.B., Liu Z.L., Recycling utilization patterns of coal mining waste in China. Resources Conservation & Recycling, 2010, 54(12): 1331–1340.

    Article  Google Scholar 

  3. Li P.W., Yang D.J., Qiu X.Q., et al., Study on enhancing the slurry performance of coal-water slurry prepared with low-rank coal. Journal of Dispersion Science and Technology, 2015, 36: 1247–1256.

    Article  Google Scholar 

  4. Meng Z.Y., Yang Z.Y., Yin Z.Q., et al., Effects of coal slime on the slurry ability of a semi-coke water slurry. Powder Technology, 2020, 359: 261–267.

    Article  Google Scholar 

  5. Zhang W., Liu J.Z., Gao M.M., et al., A novel operation cost optimization system for mix-burning coal slime circulating fluidized bed boiler unit. Applied Thermal Engineering, 2019, 148: 620–631.

    Article  Google Scholar 

  6. Arjunwadkar A., Basu P., Acharya B., A review of some operation and maintenance issues of CFBC boilers. Applied Thermal Engineering, 2016, 102: 672–694.

    Article  Google Scholar 

  7. Gong Z., Liu Z., Zhou T., et al., Combustion and NO emission of Shenmu char in a 2 MW circulating fluidized bed. Energy & Fuels, 2015, 29(2): 1219–1226.

    Article  Google Scholar 

  8. Zhou T., Gong Z., Lu Q., et al., Experimental study on enhanced control of NOx emission from circulating fluidized bed combustion. Energy & Fuels, 2015, 29(6): 3634–3639.

    Article  Google Scholar 

  9. Ji J.Q., Cheng L.M., CFD modeling of sodium transformation during high-alkali coal combustion in a large-scale circulating fluidized bed boiler. Fuel, 2020, 279: 118447.

    Article  Google Scholar 

  10. Fan H.D., Deng B.Y., Shi J., et al., Experimental research on morphology and drying characteristics of coal slime dough injected into circulating fluidized bed boiler. Fuel Processing Technology, 2021, 222: 106981.

    Article  Google Scholar 

  11. Lv H., Zhang W.G., Several feeding combustion modes of coal slime in fluidized bed boiler. Power Equipment, 2011, 25(03): 155.

    Google Scholar 

  12. Cen K.F., et al., Theoretical design and operation of circulating fluidized bed boiler. China Electric Power Press, Beijing, 1998.

    Google Scholar 

  13. Song G., Xiao Y., Yang Z., et al., Operating characteristics and ultra-low NOx emission of 75 t/h coal slime circulating fluidized bed boiler with post-combustion technology. Fuel, 2021, 292: 120276.

    Article  Google Scholar 

  14. Ji Z., Song G., Yang Z., et al., Effect of post-combustion air distribution on NOx original emission and combustion characteristics of 75 t/h coal slime circulating fluidized bed boiler. Journal of the Energy Institute, 2021, 99: 154–160.

    Article  Google Scholar 

  15. Gong Z., Zhou T., Lu Q., et al., Combustion and NOx emission characteristics of Shenmu char in a circulating fluidized bed with post-combustion. Energy & Fuels, 2016, 30(1): 31–38.

    Article  Google Scholar 

  16. Zhou T., Lu Q., Cao Y., et al., Study on the combustion and NOx emission characteristics of low rank coal in a circulating fluidized bed with post-combustion. Canadian Journal of Chemical Engineering, 2017, 95(12): 2333–2340.

    Article  Google Scholar 

  17. Glarbor P., Jensen A.D., Johnsson J.E., Fuel nitrogen conversion in solid fuel fired systems. Progress in Energy and Combustion Science, 2003, 29(2): 89–113.

    Article  Google Scholar 

  18. Li Y.M., Zhao J.T., Zhang Y.Y., et al., Influence mechanism of coal slime briquette cracking behavior. Coal Conversion, 2018, 41(03): 50–58.

    Google Scholar 

  19. Johnsson J.E., Formation and reduction of nitrogen oxides in fluidized-bed combustion. Fuel, 1994, 73(9): 1398–1415.

    Article  Google Scholar 

  20. Hayhurst A., Lawrence A., The amounts of NOx and N2O formed in a fluidized bed combustor during the burning of coal volatiles and also of char. Combustion & Flame, 1996, 105(3): 341–357.

    Article  Google Scholar 

  21. SchöNenbeck C., Gadiou R., Schwartz D., A kinetic study of the high temperature NO-char reaction. Fuel, 2004, 83(4–5): 443–450.

    Article  Google Scholar 

  22. Liu Y.P., Li J.M., Yu Y.S., et al., Test study on mixedly burning coal slime in 300 MW CFB boiler. Thermal Power Generation, 2010, 39(10): 60–64, 76.

    Google Scholar 

  23. Wang P.Q., Wang C.A., Yuan M.B., et al., Experimental evaluation on co-combustion characteristics of semi-coke and coal under enhanced high-temperature and strong-reducing atmosphere. Applied Energy, 2020, 260: 114203.

    Article  Google Scholar 

  24. Zhao J., Wei X., Li T., et al., Effect of HCl and CO on nitrogen oxide formation mechanisms within the temperature window of SNCR. Fuel, 2020, 267: 117231.

    Article  Google Scholar 

  25. Xu M., Li S., Wu Y., et al., The characteristics of recycled NO reduction over char during oxy-fuel fluidized bed combustion. Applied Energy, 2017, 190: 553–562.

    Article  ADS  Google Scholar 

  26. Furusawa T., Tsunoda M., Tsujimura M., et al., Nitric oxide reduction by char and carbon monoxide: Fundamental kinetics of nitric oxide reduction in fluidized bed combustion of coal. Fuel, 1985, 64(9): 1306–1309.

    Article  Google Scholar 

  27. Wang C.A., Wang C.W., Jia X.W., et al., NO formation characteristics and fuel-nitrogen transformation mechanism during co-firing of low-volatile carbon-based solid fuels with bituminous coal. Fuel, 2021, 291: 120134.

    Article  Google Scholar 

  28. Song G., Lyu Q., Xiao F., et al., Experimental research of heat transfer uniformity for fluidized bed heat exchangers in a 300 MW CFB boiler, Applied Thermal Engineering, 2018, 130: 938–950.

    Article  Google Scholar 

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Acknowledgments

This work was financially supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA21040100).

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Authors and Affiliations

  1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, 100190, China

    Xueting Yang, Guoliang Song, Zhao Yang, Chao Wang & Zengcai Ji

  2. University of Chinese Academy of Sciences, Beijing, 100049, China

    Xueting Yang, Guoliang Song & Zengcai Ji

  3. Dalian National Laboratory for Clean Energy, Dalian, 116023, China

    Guoliang Song

  4. School of Engineering Science, University of Science & Technology of China, Hefei, 230026, China

    Chao Wang

  5. Shandong Huaju Energy Co. Ltd, Jining, 273500, China

    Xingshun Zhang

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  1. Xueting Yang
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  2. Guoliang Song
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  3. Zhao Yang
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  4. Chao Wang
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  5. Zengcai Ji
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Correspondence to Guoliang Song.

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Yang, X., Song, G., Yang, Z. et al. Combustion and NOx Emission Characteristics of Coal Slime Solid Waste at Different Feeding Positions. J. Therm. Sci. 32, 2351–2360 (2023). https://doi.org/10.1007/s11630-023-1863-2

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  • DOI: https://doi.org/10.1007/s11630-023-1863-2

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