B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
23/422
B01J 8/36 (2006.01)
Patent
CA 1190386
ABSTRACT Apparatus for Use in Processing a Substance in a Fluidized Bed The apparatus comprises a process vessel (11) containing a process bed (16) of fluidized particles, having a submerged entrance port (19) at one end and a submerged exit port (24) at the other end. Preferably the exit port (24) provides an exit path for particles from the process bed (16) to a second fluidized bed (41) of particles in a second vessel (40) and the entrance port (l9) provides an entrance path for particles to enter the process bed (16) from the second bed (41). The bottom of the entrance port (19) is defined by a ramp (20) which slopes downwardly from a location (e.g. in the second bed (40)) outside the process vessel (11) to a sump area within the process vessel (11), the base of the sump area being defined by a first gas distributor (23). A second gas distributor (28) extends horizontally at a higher level from a side of the sump area to the vicinity of the exit port (24) and preferably a step (29) defines the side of the sump area. Vigorous fluidization of particles in the sump area removes particles from the lower end of the ramp (20) faster than they can accumulate thereby promoting a flow of particles from the entrance port (19) to the exit port (24). A similar combination of a sloping ramp (25) and distributors (43,44) at two levels in the second vessel (40) promotes particle-circulation in one sense through both fluidized beds (16,41). A relatively low density substance (e.g. coal) added (31) to the sump area of the process bed (16) is largely retained in the process bed (16) while denser particles (e.g. Ca0 and CaS04) circulate from the process bed (16) to the second bed (41) and return to the process bed (16). The second bed (41) is preferably for oxidation and heating the denser bed particles.
421507
Exxon Research And Engineering Company
Ogilvy Renault
LandOfFree
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