气固反应的终止判断与酸性气体干式净化能限分析

A NEW TERMINATION CRITERION FOR GAS-SOLID REACTIONS AND ITS APPLICATION TO ACIDIC GASES DRY REMOVAL CAMCITY AND UTILIZATION ANALYSIS

借助成核—晶体生长模型，对气固反应过程中固体产物层的形成进行能耗分析，提出最小稳定晶核尺寸与成长后的晶粒相等的终止判据，与原来普遍使用的阅值孔隙率终止判据相补充，全面考虑气固反应的终止原因．在数值模拟中利用这些终止判据，预测垃圾焚烧炉排烟中HCI气体与钙吸收剂之间的干式反应程度，分析烟气干式净化的使用条件．

With the help of nucleation and crystallization model and energy analysis, a new ter-mination criterion was proposed for gas-solid reactions with solid product formation. Whenthe size of minimum stable nucleus in the reaction process reaches that of the developedcrystal, the reactions cease. This new termination criterion and the generally used perco-lation threshold porosity criterion replenish each other under differellt conditions, and theformer is suitable for acidic gases dry absorption capacity prediction in practice. By numeri-cal predictions using these criteria conditions under which dry removal can be applied to areanalyzed.