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化学链燃烧是一种基于零排放理念的能够在煤燃烧过程中实现CO2内分离的具有很好应用前景的燃烧方式.基于东南大学1kWth串行流化床反应器,在对基于铁矿石载氧体煤化学链燃烧技术的基本概念与特点介绍的基础上,对铁矿石载氧体煤化学链燃烧特性进行实验研究分析.研究结果表明:铁矿石载氧体的存在显著提高了煤气化速率,燃料反应器出口CO2浓度将近90%,燃料反应器出口未检测到C2-C4碳氢化合物.煤种对铁矿石载氧体化学链燃烧特性影响较大,神华烟煤由于在燃料反应器较易气化,其化学链燃烧过程中碳转化率和CO2捕集效率均高于淮北无烟煤.在燃料反应器为970℃时,神华烟煤CO2捕集效率为82%,高于淮北无烟煤的65%.
Chemical-based combustion is a kind of combustion method based on zero-emission idea, which can realize CO2 internal separation in coal combustion process.Based on the 1kWth serial fluidized bed reactor of Southeast University, Based on the basic concepts and characteristics of oxygen-based coal chemical combustion technology, the experimental study on the chemical combustion of iron ore oxygen carrier coal was carried out.The results show that the existence of iron ore oxygen carrier significantly improves the gas , The CO2 concentration at the exit of the fuel reactor is nearly 90%, and no C2-C4 hydrocarbons are detected at the outlet of the fuel reactor.The coal species have a great influence on the chemical chain combustion characteristics of the iron ore oxygen carrier, Which is easier to gasify.The carbon conversion rate and CO2 capture efficiency in chemical chain combustion process are both higher than that of Huaibei anthracite.When the fuel reactor is 970 ℃, the capture efficiency of Shenhua bituminous coal is 82%, higher than that of Huaibei anthracite 65%.