基于化学链制氧的加热炉富氧燃烧系统构建及分析

基于化学链制氧原理构架了加热炉富氧燃烧系统，以解决富氧燃烧氧气来源问题.通过对Co₃O₄氧解耦特性的研究，分析构建系统的可行性.结果表明:Co₃O₄释氧反应平衡氧的体积分数随温度升高而急剧增大，当反应温度为900℃时，平衡氧的体积分数为29.6%;烟气中CO₂，H₂O等成分不会对Co₃O₄释氧过程产生影响;随Co₃O₄与烟气物质量的比的增大，烟气中氧气的体积分数逐渐增大，当物质量的比为1∶1时，950℃下氧气的体积分数可达24.5%;考虑实际生产过程，产量为32t/h的蓄热式轧钢加热炉，富氧率为4%时，Co₃O₄填充量为3.4t.

Construction and Analysis of Heating Furnace Oxy-Fuel Combustion System Based on Chemical Looping Oxygen Production

Based on the principle of chemical looping oxygen production， the oxy-fuel combustion system of heating furnace was built to solve the oxygen source problem.The feasibility of constructing the system was analyzed by investigating the characteristics of Co₃O₄ oxygen uncoupling. The results showed that the volume fraction of the equilibrium oxygen from the Co₃O₄ reduction increases sharply with the reaction temperature. When the temperature is 900℃， the volume fraction of the equilibrium oxygen is 29.6%.The components of CO₂ and H₂O in flue gas do not affect the oxygen release process of Co₃O₄. The oxygen volume fraction in flue gas increases with increasing the mole ratio of Co₃O₄ and flue gas. When the mole ratio is 1:1， the oxygen volume fraction can be up to 24.5% at 950℃. In practice， for a furnace with 32t/h output，when the oxygen-enriched rate is 4%， the Co₃O₄ filling capacity is 3.4t.