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Emission characteristics for co-combustion of leather wastes, sewage sludge, and coal in a laboratory-scale entrained flow tube furnace

  • Mingxiu ZhanEmail author
  • Chen Sun
  • Tong Chen
  • Xiaodong Li
Research Article
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Abstract

Four different mixed fuels consisted of leather waste, coal, and sewage sludge were combusted in a lab-scale entrained flow fluidized bed furnace. The influence of blending ratio on emission characteristics of SO2, NOx, HCl, particulate matter (PM), heavy metals, and polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) was studied. Results showed that the mixing of coal with sewage sludge had a complex effect on the emission characteristics. On the one hand, with more sewage sludge blending in the mixed fuel, the acid gas pollutant (SO2, NOx) decreased a lot, and the recovery of volatile heavy metals (Cd, Pb) increased at the same time. Furthermore, the leaching toxicity of Cr in the fly ash and bottom ash went down below the national standard with the adding of sewage sludge. On the other hand, the mixing of sewage sludge which consisted of more ash content resulted in the increase of the PM emission. Moreover, the high content of Cu and chlorine in the sewage sludge can promote the formation of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) when the fuel 3 and 4 were combusted. Most importantly, the concentration of toxic PCDD/Fs in the flue gas produced from fuel 3 and fuel 4 was successfully controlled down below 0.20 ng I-TEQ/Nm3 by the active carbon.

Keywords

Co-combustion Heavy metals PCDD/Fs Sewage sludge Leather waste Coal 

Notes

Funding information

This research was supported by the National Natural Science Foundation of China (NSFC 51806205).

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Mingxiu Zhan
    • 1
    Email author
  • Chen Sun
    • 2
  • Tong Chen
    • 2
  • Xiaodong Li
    • 2
  1. 1.College of Metrology and Measurement EngineeringChina Jiliang UniversityHangzhouChina
  2. 2.State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power EngineeringZhejiang UniversityHangzhouChina

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