Co-Combustion Characteristics of Municipal Sewage Sludge and Coal in a Lab-Scale Fluidized Bed Furnace

Zuopeng Qu (), Xiaotian Wei, Wendi Chen, Fei Wang, Yongtian Wang and Jisheng Long
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Zuopeng Qu: National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 100096, China
Xiaotian Wei: National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 100096, China
Wendi Chen: State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China
Fei Wang: State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China
Yongtian Wang: National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 100096, China
Jisheng Long: Shanghai SUS Environment Co., Ltd., Shanghai 200234, China

Energies, 2023, vol. 16, issue 5, 1-11

Abstract: The co-combustion of dry coal and sludge was carried out in a self-built laboratory scale fluidized bed furnace. We used FTIR spectroscopy, high-resolution gas chromatography, high-resolution mass spectrometry, and XRF to capture and dynamically observe the flue gas fly ash and bottom ash. The sludge sample was taken from a municipal sewage treatment plant and its mixing ratio was below 20%. The temperature distribution of the furnace was observed and the emissions of the main gaseous pollutants such as SO 2 , NOx, and dioxins were measured in the combustion process. The heavy metal contents of fly ash and bottom ash were later detected to analyze the migration characteristics. The results showed that all of the gaseous pollutants measured increased linearly with the sludge mixing ratio. However, it could also meet the 1 metal content of bottom ash and fly ash did not change much. Through the elaboration of the above points, this study can provide guidance for future research on the co-combustion of coal boiler sludge and suggest favorable conditions for the co-combustion of coal boiler sludge.

Keywords: sludge; co-combustion; mixing ratio; gaseous pollutants; heavy metal (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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