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    • 3. 发明授权
    • Minimal holdup reactor grid
    • 最小停留电抗器电网
    • US5043145A
    • 1991-08-27
    • US126252
    • 1987-11-27
    • Arthur A. LietzArthur YanowitzPatrick H. TerryMichael Bober, Jr.William L. Wickman
    • Arthur A. LietzArthur YanowitzPatrick H. TerryMichael Bober, Jr.William L. Wickman
    • B01J8/24C10G11/18
    • C10G11/18B01J8/1872
    • The present invention contemplates an improved grid for fluid bed reactors which minimizes catalyst coking in fluidized catalytic cracking operations by shedding catalyst dispersed through the grid from feed risers located therebelow. Indeed, the grid has a central portion containing a plurality of orifices therein and a downwardly extending annular ring portion for shedding catalyst outwardly and downwardly for collection and removal from the reactor vessel.In the preferred embodiment of the present invention, the grid consists of a convex upper grid and a concave lower plate joined together and defining a disengaging zone therebetween. At least one riser opens into the disengaging zone for introducing the material to be fed into and separated in the reactor. The upper grid includes a solid annular ring which extends outwardly and downwardly from the point at which the upper grid and the lower plate are joined.
    • 本发明考虑了用于流化床反应器的改进的格栅,其通过从位于其下方的进料塔排出通过网格分散的催化剂,使流化催化裂化操作中的催化剂焦化最小化。 实际上,格栅具有在其中包含多个孔的中心部分和向下延伸的环形环部分,用于向外和向下释放催化剂以从反应器容器收集和移除。 在本发明的优选实施例中,栅格由连接在一起并在其间限定分离区的凸上格栅和凹下板组成。 至少一个提升管通向分离区,用于引入待进料并在反应器中分离的材料。 上格栅包括从上格栅和下板连接的点向外和向下延伸的实心环形圈。