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Co-disposal technology for sludge and municipal solid waste based on SNCR optimization

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  • Lin, Tao
  • Liao, Yan-fen
  • Dai, Tong-hua
  • Ma, Xiao-qian

Abstract

Increasing pressure on the treatment of domestic waste and sewage sludge in large cities has led to a trend towards large-capacity incinerators and blended combustion. The steady-state sludge blending combustion process of a 900 t/d waste incinerator was simulated using numerical software. The objective was to analyze the impact of the sludge blending ratio on the combustion characteristics, identify the ideal sludge blending ratio for this type of furnace, and then optimally adjust the selective non-catalytic reduction (SNCR) spray gun to achieve low pollutant emissions. The findings indicate that the temperature, turbulence and residence time at 850 °C (3T principle), which takes into consideration elements like NOx emission control and high-temperature corrosion of flue equipment, has a maximum sludge blending ratio of 10%. In terms of optimization of the number and structure of SNCR spray guns, seven spray guns arranged in a double layer were for the SNCR scheme, which has a de-commissioning efficiency of 55.81%. The article's study findings assist and serve as a resource for SNCR spray gun optimization as well as operational optimization of high-capacity garbage incinerators.

Suggested Citation

  • Lin, Tao & Liao, Yan-fen & Dai, Tong-hua & Ma, Xiao-qian, 2024. "Co-disposal technology for sludge and municipal solid waste based on SNCR optimization," Energy, Elsevier, vol. 292(C).
    • Handle: RePEc:eee:energy:v:292:y:2024:i:c:s0360544224003542
    DOI: 10.1016/j.energy.2024.130582
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    References listed on IDEAS

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    1. Liu, Hanqiao & Qiao, Haoyu & Liu, Shiqi & Wei, Guoxia & Zhao, Hailong & Li, Kai & Weng, Fangkai, 2023. "Energy, environment and economy assessment of sewage sludge incineration technologies in China," Energy, Elsevier, vol. 264(C).
    2. 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).
    3. Garbacz, Przemysław & Wejkowski, Robert, 2020. "Numerical research on the SNCR method in a grate boiler equipped with the innovative FJBS system," Energy, Elsevier, vol. 207(C).
    4. Zhao, Peitao & Chen, Hongfang & Ge, Shifu & Yoshikawa, Kunio, 2013. "Effect of the hydrothermal pretreatment for the reduction of NO emission from sewage sludge combustion," Applied Energy, Elsevier, vol. 111(C), pages 199-205.
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