CFD在丙烷脱氢流化床反应器中的应用

摘要

A three-dimensional multi-scale CFD model was developed for a propane dehydrogenation reactor in a pilot-scale circulating fluidized bed device.By using the CFD model,sensitivity studies on operation conditions were conducted.Findings indicated that the 3D multi-scale CFD model could describe precisely the reaction paths occuring in the propane dehydrogenation reactor.Besides,the optimum operation conditions for the propane dehydrogenation was obtained:reaction temperature of 600 ℃,GHSV of 2 350 h-1,catalyst inventory of0.8 kg,and the mean particle diameter is 70 μm.Under the optimal conditions,the conversion of propane is 43.46％ and the selectivity of propylene is 85.66％,the yield of propylene reaches up to 37.24％.℃FD is proved to be capable of applications in the simulation,design,scaleup and optimizations of fluidized bed reactors for propane dehydrogenation process.%针对某中试循环流化床装置中的丙烷脱氢反应器建立了三维多尺度CFD流动-传热-反应耦合模型,并采用该模型对丙烷脱氢反应器的操作工况进行了参数优化研究.所建立的三维多尺度CFD模型能够较准确地刻画丙烷脱氢在整个流化床反应器内的反应历程.通过参数优化研究获得丙烷脱氢反应器的最佳操作条件为:反应温度600℃,体积空速2 350 h-1,催化剂装量0.8 kg,催化剂平均粒径70 μm.在此操作工况下,丙烷转化率为43.46％,丙烯选择性为85.66％,丙烯收率达37.24％.所建立的CFD模型能够用于丙烷脱氢流化床反应器的模拟、设计、放大与优化等过程.