Experimental Investigation of Circulating Fluidized Bed Gasification in O2-Enriched Air and Steam [循环流化床煤富氧-水蒸气气化实验研究]

作者：Liang C.; Lü Q.^*; Zhang H.; Wang X.; Zhu Z.

来源：Journal of Combustion Science and Technology, 2019, 25(2): 105-111.

DOI：10.11715/rskxjs.R201807002

• Circulating fluidized bed
• Gasification
• O2-enriched air and steam
• Syngas
• Thermodynamic equilibrium calculation

Experiments were conducted on a 0.25 t/d circulating fluidized bed (CFB) gasifier to develop a CFB gasification method to produce syngas. The effects of oxygen concentration and oxygen-to-coal ratio were studied via experiments and thermodynamic equilibrium calculations. The steam gasification reaction was enhanced when the oxygen concentration in the gasifying agent was increased from 21% to 60% and steam was used to maintain the operation temperature. CO yields,H2 yields,carbon conversion, and cold gas efficiency were improved by this enhancement. As the oxygen-to-coal ratio increased from 0.41 m3/kg to 0.56 m3/kg,the steam gasification reaction was barely enhanced,and the CO and H2 yields decreased. Evolution of the gas composition under increasing oxygen concentrations was verified by ther-modynamic equilibrium calculations,and results indicated that CO yields,H2 yields,and values could be improved by better thermal insulation and longer residence time.

• 单位
  中国科学院大学