Effects of coal composition on performance of entrained-flow coal-water slurry gasifier
KONG Xiang-dong1, TAO Li-li1, ZHONG Wei-min2, CHENG Hui1, QIAN Feng1
1.Key Laboratory of Advanced Control and Optimization for Chemical Processes, Ministry of Education,
East China University of Science and Technology,Shanghai 200237, China；2. Automation Institute,
East China University of Science and Technology, Shanghai 200237, China
An equilibrium model of entrained-flow coal-water slurry gasifier was developed based on the assumption of chemical equilibrium. In order to provide guidance for industrial gasifier operations such as preparing coal, blending coal and changing coal types, the effects of the amount of element C, H, O and ash in dry coal on the performance of gasifier were investigated by means of changing H/C and O/C molar ratios and ash content. Calculated gas compositions and gasification temperatures showed a fairly good agreement. The simulation shows that at the same operating temperature, the syngas productivity and the oxygen consumption increase with the O/C molar ratio. However, with the increase of H/C molar ratio, the syngas productivity increases slightly and the oxygen consumption remains unchanged. The relative amount of element O in coal has a significant effect on the performance of gasifier. The syngas productivity reduces and the oxygen consumption raises with the increase of ash content. The above simulation results indicate that the effects of major constituents of coal, i.e. C, H, O and ash on the performance of gasifier should be concerned, and the operating parameters need be adjusted in the industrial operating to optimize the production process and enhance the economic benefits．
KONG Xiang-dong, TAO Li-li, ZHONG Wei-min, CHENG Hui, QIAN Feng. Effects of coal composition on performance of entrained-flow coal-water slurry gasifier. J4, 2013, 47(9): 1685-1689.
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