煤和生物质化学链共气化特性研究

Study on the characteristics of chemical chain co-gasification of coal and biomass

化学链气化是用于合成气生产的气化技术,通过氧气载体循环,减少了对纯氧和外界热量的需求。研究天然氧载体(铁矿石、硫酸渣、红泥)对褐煤和木屑化学链共气化特性的影响,结果表明,当褐煤和木屑掺混比7∶3、温度900℃、水蒸气流量400 mL/min、O/C比为0.2时,褐煤和木屑化学链共气化达到最优气化工况,碳转化率为87.2%,气化效率为68.7%,说明天然载氧体对褐煤和木屑共气化反应具有较好的促进作用。

Chemical chain gasification is a gasification technology for the production of synthesis gas,which reduces the need for pure oxygen and external heat through the circulation of an oxygen carrier.Investigates the impact of natural oxygen carriers(iron ore,sulfuric acid slag,red mud)on the characteristics of chemical chain co-gasification of lignite and wood sawdust.The results indicate that when the blending ratio of lignite to wood sawdust is 7∶3,the temperature is 900°C,the steam flow rate is 400 mL/min,and the O/C ratio is 0.2,the chemical chain co-gasification of lignite and wood sawdust achieves optimal gasification conditions.The carbon conversion rate reaches 87.2%,and the gasification efficiency is 68.7%,demonstrating that natural oxygen carriers have a good promoting effect on the co-gasification reaction of lignite and wood sawdust.