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Experiment Research on Gasification Character of Pulve-rized Coal at Medium Temperature
College of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, China
College of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, China; School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China
School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China
School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China
College of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, China
College of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, China
- 1 College of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, China
- 2 College of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, China; School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China
- 3 School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China
- 4 School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China
- 5 College of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, China
- 6 College of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, China
Energy and Power Engineering·Volume 05 (2013)·Pages 315–318·Published 30 June 2013·DOI10.4236/epe.2013.54B062
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Abstract
In this paper, effect of gasification temperature and residence time on gasification characteristics of typical pulverized coals under atmosphere pressure were studied on a one-dimensional electric heating drop tube furnace system to evaluate gasification characteristics of pulverized coal at medium temperature. The results show that the gasification rate increases with the raising of the gasification temperature under the temperature among 115 0 ℃ and145 0 ℃ , and as the temperature is above135 0 ℃ , the increasing rate become slower. Cold gas efficiency and carbon conversion meet the maximum value when the temperature approaches the ash fusion point of coal. With the further rise of the temperature, ash on the surface of the char starts to be melted, the gasification reaction rate decreases, due to the hindrance of the effective contact between coal char and gasification agent. The gasification efficiency would become steady when the residence time exceeds 8s.
KeywordsGasification CharacteristicPulverized CoalCarbon ConversionCold Gas Efficiency
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