稻壳在固定床中空气气化的数值模拟

NUMERICAL SIMULATION OF RICE HUSK AIR GASIFICATION IN FIXED BED

利用Aspen Plus建立稻壳在上吸式固定床气化炉内的空气气化模型,该模型预测气化温度、产气组分和热值,与试验数据吻合良好。利用Aspen Plus的灵敏度分析模块研究空气当量比ER值对气化温度、气体组分、产气热值以及气化效率的影响。结果表明:随着ER值的增加,气化温度逐渐升高,CO、H2和N2含量逐渐增加,而CH4和CO2含量逐渐减少,热值和气化效率也随之降低。

The model of rice husk air gasification in the up-drafted fixed bed was developed using aspen plus. The model predicts gasification temperature, gas composition and heating values in good agreement with experimental data. The sensitivity analysis module of Aspen Plus was used to research the effect of air equivalence ratio ER value on the gasification temperature, gas composition, heating value and gasification efficiency. The results showed that when the gasification temperature increases graduall hydrogen （ H2 ） and nitrogen （ N2 ） increase withe y with increasing the ER value. And carbon monoxide （CO） , decreasing methane （ CH4 ） and carbon dioxide （ CO2 ）. The heating value and gasification efficiency also decrease accordingly.