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>> Recently, gasification technology for coal blended with biomass has been an issue. Especially, Anadvantages of coal blended with biomass are 1) obtaining high cold gas efficiency, 2) obtaining syn-gas of high-highheating value (HHV), and 3) controlling occurrence of CO 2 . In this study, the efficiency and characteristic of 300MW Shell type gasifier were predicted using CFD simulation. The CFD simulation was performed for biomasscoalblending ratios of 0∼0.2, 0.5, 1 and O 2 /fuel ratios of 0.50.84. Kinetic parameters (A, E a ) obtained by CO 2 gasification experiment were used as inputs for the simulation. In results of CFD simulation, residence times ofparticle in 300MW Shell type gasifer presented as 7.39 sec ~ 13.65 sec. Temperature of exit increased with O 2 /fuelratio as 1400 K ~ 2800 K, while there is not an effects of biomasscoal blending ratios. Considering both aspectsof temperature for causing wall slagging and high cold gas efficiency, the optimal O 2 /fuel ratio and blending ratiowere found to be 0.585 and 0.05, respectively.

Numerical Study on 300 MW Shell-Type One-Stage Entrained Flow Bed Gasifier : Effect of Coal·Biomass Blending Ratio on CO2Gasification

Numerical Study on 300 MW Shell-Type One-Stage Entrained Flow Bed Gasifier : Effect of Coal·Biomass Blending Ratio on CO₂Gasification