关键词: 气化炉, 动力学, 建模, 氧煤比

Abstract: By using the unreacted-core shrinking model，a kinetic model of gas-solid reaction in GE gasifier was developed. The mass and heat balances in the gasifier based on the “small compartment model” were established. The modeling results were compared with literature values，and the error of main gas mole fraction of gasification outlet was less than 2%，showing that modeling results were in agreement with reported values. The effects of oxygen to coal ratio and coal slurry concentration on syngas content，temperature and cold gas efficiency were analyzed. CO concentration increased and H2 concentration decreased with increasing oxygen to coal ratio，meanwhile CO2 concentration stayed constant. Cold gas efficiency increased firstly，and then declined in the range of 74%－79%. CO concentration increased，and H2，CO2 concentration decreased with increasing coal slurry concentration，but cold gas efficiency changed little. The profiles of syngas concentration and temperature distribution were studied at oxygen to coal ratio of 0.95 and coal slurry concentration of 55%. When gasifier height was less than 0.5m，the reaction between C and O2 occured rapidly，and when O2 was consumed completely，temperature decreasesd.

Key words: gaifier, kinetic, modeling, ratio of oxygen to coal