Patent ID: 7780928

Claim:
A radial flow moving bed regeneration/reaction system in which a plurality of solid particles moves gravitationally into and out of the system in a continuous or semi-continuous mode in dense phase, comprising: a vertically oriented cylindrical outer vessel; an outer cylindrical particle retention screen and an inner cylindrical particle retention screen, wherein both the outer screen and the inner screen are located within the outer vessel and concentric with the central vertical axis of the outer vessel; an annular reactant distribution volume between the vessel and the outer screen, wherein the annular reactant distribution volume is communicated with at least one reactant inlet conduit for introducing a reactant fluid; an annular particle retention volume between the outer screen and the inner screen, wherein the annular particle retention volume is used for the regeneration/reaction, at least one particle inlet conduit communicates with the upper end of the annular particle retention volume, at least one particle withdrawal conduit communicates with the lower end of the annular particle retention volume, and a bed depth is defined as the distance between the outer screen and the inner screen; at least one intermediate screen inserted between the outer screen and the inner screen in the particle retention volume, the reactant fluid traverses across the intermediate screen but with no solid particle traverses across the same screen, wherein the intermediate screen divides the annular particle retention volume in all or at least part of the volume into at least two flow channels, by adjusting the intermediate screen location or slope or cross sectional opening at the bottom of the intermediate screen, the residence time of the solid particle in at least one flow channel is changed; and a cylindrical effluent collection volume within the inner screen, wherein at least one reactant outlet conduit communicates with the effluent collection volume.