Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Characteristic Evaluation of RDF for the Combined Drying Produced by Weight Mixing Ratio Use Chemical Wastewater Sludge and Anthracite Coal

화학폐수슬러지와 무연탄을 이용한 복합건조공정의 조사시간에 따른 고형연료의 특성 평가

  • Lee, Seung-Chul (Department of Environmental Engineering, Dong-A University) ;
  • Jung, Jin-Hee (Department of Environmental Engineering, Dong-A University) ;
  • Lee, Jun-Hee (Department of Environmental Engineering, Dong-A University)
  • Received : 2015.12.04
  • Accepted : 2016.02.12
  • Published : 2016.03.31
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Abstract

The objective of this study was to evaluate the microwave drying characteristics of mixtures of chemical wastewater sludge (70~90%) and anthracite coal (10~30%) with respect to physical and economic factors such as mass, volume reduction, moisture content, drying rate and heating value when the wastes were dried at different weight mixing ratio and for different microwave irradiation time. The drying process were carried out in a microwave oven, the combined drying process with a 2,450 MHz frequency and 1 kW of power. Maximum dry rates per unit area on the microwave drying of mixtures with chemical wastewater sludge and anthracite coal were $35.5kg\;H_2O/m^2{\cdot}hr$ for Cs90-Ac10; $40.1kg\;H_2O/m^2{\cdot}hr$ for Cs80-Ac20 and $35.0kg\;H_2O/m^2{\cdot}hr$ for Cs70-Ac30. The result clearly indicated that moisture can be effectively and inexpensively removed from the wastes through use of the microwave drying process.

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References

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