棉花壳催化热解气化过程建模与优化

摘要

In this study, the model of cotton shell catalytic pyrolysis process has been established based on LS-SVM.The result shows that the LS-SVM model is effective.According to this, the constraints in the cotton shell pyrolysis process have been analyzed, and the objective function was established.It aimed at looking for the optimal control parameters for the maximum content of combustible gas component H2 and CO.The calculation result shows that the contents of H2 and CO can reach their maximum of 49.939 4％ and 27.601 7％ respectively when the dosage of Na2CO3and pyrolysis temperature are 27.849 3％ and 1 087.158 4 K respectively; and he contents of H2 and CO can reach their maximum of 52.110 5％ and 27.119 3％ when the dosage of K2CO3 and pyrolysis temperature are 28.445 6％ and 1 065.326 5 K respectively.%建立了棉花壳催化热解气化过程的最小二乘支持向量机模型,验证结果表明,该模型对棉花壳气化过程具有较好的模拟效果.在此基础上,进一步确立了棉花壳催化热解气化过程的约束条件,建立了该过程的优化目标函数,旨在寻找可燃气体组分H:和CO含量达到最大值时,气化温度和催化剂添加量应满足的优化目标值.优化计算表明:当Na2CO3添加量和气化温度优化目标值分别为27.8493%和1087.158 4 K时,H:和CO含量均达到最大值49.9394%和27.601 7%;当KZCO,添加量和气化温度优化目标值分别为28.4456%和1065.326 5 K时,H:和CO含量均达到最大值52.1105%和27.119 3%.