Patent EP-2050493-A1 (EP)
Inventor: DE BROQUEVILLE AXEL
IPC: B01J8/38
Filed: 2007-10-19
Abstract: The cylindrical rotary fluidized bed device useful in a cracking process, comprises a reactor having a circular chamber (55), a unit for supplying solid particles to the chamber, a unit for removing solid particles from the chamber, fluids, gases or liquids supplying unit positioned around a circular wall of the chamber, fluid injectors distributed around the wall for injecting fluids along the wall, and a unit for removing fluids. An orientation of the injectors has a component tangential to the circular wall, which is connected to a motor. The cylindrical rotary fluidized bed device useful in a cracking process, comprises a reactor having a circular chamber (55), a unit for supplying solid particles to the chamber, a unit for removing solid particles from the chamber, fluids, gases or liquids supplying unit positioned around a circular wall of the chamber, fluid injectors distributed around the wall for injecting fluids along the wall, and a unit for removing fluids. An orientation of the injectors has a component tangential to the circular wall, which is connected to a motor. The injectors comprise passages with constrictions that widen suddenly in a non-aerodynamic manner to generate turbulence fluids for controlling the distribution of fluid along the circular wall and improving the flow properties and homogeneity of rotary fluidized bed. The fluid removal unit comprises a central chimney traversing lengthwise or penetrating to an interior of the circular chamber, where the chimney is connected to the motor. A wall of the central chimney comprises an opening (420) to evacuate the fluid or fluid mixture from the circular chamber. The constrictions are obtained by longitudinal and/or transversal obstruction elements, which are constituted by a structural form of the circular wall. A ratio between a section of the fluid injector exit and a section of the constrictions is 2. The obstruction elements comprise longitudinal and transversal blocks placed inside the passages, and rings or helical coils. The transversal blocks divide the passages in a succession of transversal constrictions, where the longitudinal lengths of the transversal blocks are greater than or equal to a longitudinal length of the constrictions. The rings or helical coils are applied against and inside or outside of the circular wall, and partially cover the opening of the passages. The circular wall is formed by a succession of coupled plates, and is provided by transversely grooved surfaces for separating two coupled plates, where the surfaces form a succession of narrow passages and obstruction elements. The non-aerodynamic constrictions makes an angle of expansion greater than 60[deg] along a sharp edge of the injectors. A distance separating the injectors is less than or equal to an average radius of the circular wall. A sum of the exit opening sections is less than twice a sum of the fluid injector exit sections. A distance between the exit openings is less than or equal to an average radius of the chimney wall. The directions of fluid injection form an angle of = 30[deg] with the tangent of the circular wall near a downstream of the fluid injectors. The circular wall is in cylindrical, elliptical or conical form, or an inner surface of the wall comprises plane parts between two consecutive fluid injectors. A surface between two consecutive fluid injectors comprises a part of which a curvature is concave. An independent claim is included for a process of injecting a fluid in a rotary fluidized bed device.