Thermal-calculation method for entrained-flow coal gasifiers

Haopeng Wang, Zhichao Chen, Bin Zhang, Lingyan Zeng, Zhengqi Li, Xiaoyan Zhang, Neng Fang and Xiaoying Liu

Energy, 2019, vol. 166, issue C, 373-379

Abstract: While entrained-flow coal gasifiers (EFCGs) have been widely used in coal-gasification technologies, the thermal-calculation method, which is important for assessing the design and operation of EFCGs, has never been reported. Based on the fundamental thermal-calculation method for coal-fired boilers, and combined with the two-stage equilibrium model through the difference between the gasification and exit temperatures, we propose a thermal-calculation method for EFCGs to calculate the syngas composition, carbon conversion and energy distributions. The calculated gas compositions and heat loss are in good agreement with experimental data for industrial-scale plants. In the two-stage equilibrium module, the function for calculating the water participation ratio involved in the first-stage equilibrium reaction is improved by considering the influences of the ratios of oxygen/carbon and water/carbon, in addition to the gasification temperature. As the carbon conversion efficiency is significantly influenced by the oxygen/carbon and water/carbon ratios in the first-stage equilibrium system, the calculated carbon conversion efficiencies correspond more closely to the experimental data than the other models considering only the gasification temperature.

Keywords: Entrained-flow coal gasifier; Thermal-calculation method; Carbon conversion; Two-stage equilibrium model (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:166:y:2019:i:c:p:373-379

DOI: 10.1016/j.energy.2018.10.004

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