Abstract:

An outline for inner-loop studies in FCC fluidized bed is provided，including mainly baffle，vertical tube bundles and packing. The flow characteristics of both gas and solid in fluidized bed with various inner-loops are described，and the advantages and disadvantages of various types of inner-loop are discussed. The improvement process within the baffle and packing components is summarized，and the direction for future development is discussed according to the advantages and shortcomings in the existing structures of inner-loops.

摘要：

介绍了近年来催化裂化流化床中内构件的研究现状，主要包括挡板、垂直管束和填料。阐述了气、固两相在装有不同内构件的流化床中的流动特点，指明了各类内构件的优缺点。并详细阐述了挡板式和填料式内构件的改进历程，根据现有内构件存在的优缺点提出了新的内构件的开发方向。