Patent EP-1847314-A1 (EP)
Inventor: DE BROQUEVILLE AXEL
IPC: B01J8/38
Filed: 2006-04-21
Abstract: The rotary fluidized bed comprises a feeding device within two circular chambers filled with fluids, gases or liquids, a solid particle feeding device, a solid particle evacuation device, a fluid feeding device having fluid injectors (3) distributed around the chamber, a fluid recycling device, and a solid particle recycling device. The solid particles are evacuated from a circular chamber and then fed in the next chamber. The feeding device is placed around a circular wall (2) fixed on the chamber. A device is arranged for central evacuation of the fluids. The rotary fluidized bed comprises a feeding device within two circular chambers filled with fluids, gases or liquids, a solid particle feeding device, a solid particle evacuation device, a fluid feeding device having fluid injectors (3) distributed around the chamber, a fluid recycling device, and a solid particle recycling device. The solid particles are evacuated from a circular chamber and then fed in the next chamber. The feeding device is placed around a circular wall (2) fixed on the chamber. A device is arranged for central evacuation of the fluids. The fluids are injected in a direction thus forming an angle less than 45[deg] with the circular wall. The fluid evacuation device comprises a central rotating tube traversing or penetrating longitudinally inside the chamber. Central chimney of the chamber turns in the same direction at a rotational speed greater than average rotational speed of the fluids, and comprises an opening for evacuating the fluid. A part of the fluid is injected in a succession of layers along the circular wall by turning around the central rotating tube. The cross sections of the circular chamber are circles, polygons and other forms of variable curvatures, and have a fixed surface, a progressively changing surface and a stage changing surface. The central rotating tube comprises vanes, blades or fins, which drive fluid layer in a rotational motion around the rotating tube. The rotational speed of the fluid layer produces a centrifugal force greater than the average centripetal force exerted by the fluids. The fluid coming out of the central rotating tube enters in a wide-mouthed tube that allows the separation of the fluid. The fluid recycling device treats and supplies the evacuated fluid separately in successive annular sections. A concentric fixed tube is arranged exterior to the rotating tube. The vanes or fins are extended to turn around and outside a part of the fixed tube thus making the fluid layer to turn around the fixed tube. An annular disc is fixed on the central rotating tube or with the vanes, blades or fins to separate the fluids that traverse the rotating fluidized bed. The fluid evacuation device comprises a wheel with blade. A tube with an opening is fixed at a surface of the circular wall to maintain the fluidized bed with desired thickness. An element is arranged to move the solid particles longitudinally among deflectors, coils or fractions of helical coils fixed along the circular wall. A set of hollow separation rings are fixed along the circular wall, and have an inner diameter less than desired diameter of the rotating fluidized bed. The separation rings comprise a passage located on the circular wall. A device is arranged for spraying a liquid inside the central rotating tube or fixed concentric tube. The fluid injectors are capable of disintegrating the adhering of solid particles on the walls of the circular chamber.