Abstract: The effect of properties of herb residue and air equivalence ratio on the gasification characteristics of Gangmaoqingre granules was investigated. Experiments were conducted in a pilot-scale dual-loop circulating fluidized bed. With the increase of water content，gasification temperature gradually decreased，the contents of tar and CO2 increased，while CO content and carbon conversion rate decreased. Besides，H2 content，gas calorific value and gasification efficiency increased first and then decreased. Smaller particle size contributed to lower tar content and gas calorific value. However，gas yield，gasification efficiency and carbon conversion increased gradually. With the decrease of particle size，H2，CH4，CO，CnHm contents and gasification temperature increased while CO2 content decreased. With the increase of air equivalence ratio，concentration of combustible gas，especially CO，gas calorific value and tar content gradually decreased. Besides，gasificationtemperature，gas yield and carbon conversion rate gradually increased. But gasification efficiency increased first and then decreased. When water content was smaller than 4%，granularity was smaller than 4mm and air equivalence ratio was between 0.25 and 0.27，gasification efficiency would be higher，gasification result would be better.

Key words: herb residues, dual-loop circulating fluidized bed, gasification, granularity, water content, air equivalence ratio, herb residues, dual-loop circulating fluidized bed, gasification, granularity, water content, air equivalence ratio

摘要： 以感冒清热颗粒中药渣为原料，在双回路循环流化床中试设备中进行热解气化实验，研究原料含水率、原料粒径以及空气当量比ER对其气化特性的影响。结果表明：①随着原料含水率的提高，炉内平均温度降低，产生的燃气中焦油含量、CO2含量明显提高；CO含量、气体产率、碳转化率显著降低；H2含量、燃气热值以及气化效率均呈现先增大后减小的趋势。②原料粒径越小，反应炉内平均温度越高，燃气中焦油含量越低，燃气热值和气体产率越高，气化效率以及碳转化率越高；H2、CH4、CO、CnHm含量增加，CO2含量减少。③随着ER的增大，可燃气体尤其是CO的浓度不断降低，CO2含量不断增加；炉内平均温度、气体产率以及碳转化率均逐渐增大；燃气热值和燃气中焦油质量浓度逐渐减小；气化效率则呈现先增大后减小的变化趋势。④当原料含水量<9%、原料粒径<4mm以及ER在0.25~0.27时，气化效率较高，具有较好气化特性。

关键词: 中药渣, 双回路循环流化床, 气化, 粒径, 含水率, 空气当量比