B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
23/370, 23/422
B01J 8/28 (2006.01) B01J 8/26 (2006.01) B01J 8/32 (2006.01) B01J 8/38 (2006.01) C10J 3/54 (2006.01) C10J 3/56 (2006.01) F23C 6/04 (2006.01) F23C 10/00 (2006.01) F23C 10/10 (2006.01)
Patent
CA 1190384
ABSTRACT OF THE DISCLOSURE A method of operating a fast fluidized bed reactor according to the invention comprises: (1) providing a substan- tially upright fluidized bed reactor containing a bed of granular material and having an upper and a lower region, the upper region having a cylindrically shaped interior surface; (2) feeding mat- ter to be reacted into the lower region of the reactor; (3) supplying a first stream of pressurized air to the reactor through a plurality of openings in the lower region at a suffi- cient velocity to fluidize the granular material in the circulat- ing regime, whereby at least a portion of the granular material is continually entrained upward into the upper region; (4) tan- gentially supplying a second stream of pressurized air to the upper region of the reactor through at least one opening in the cylindrical interior surface of the upper region; (5) maintaining a Swirl number of at least about 0.6 and a Reynolds number of at least about 18,000 in the upper region of the reactor for provid- ing a cyclone of turbulence in the upper region which increases the rate of reaction in the reactor, wherein, at maximum operat- ing capacity for the reactor, the second stream of air consti- tutes in excess of about 50% of the total pressurized air fed to the reactor; and (6) removing a portion of the granular material and reaction gases from the upper region of the reactor through an exit port situated adjacent to the upper boundary of the cyclone of turbulence, separating the portion of the granular material from the reaction gases and returning the separated granular material to the lower region of the reactor. In one embodiment of the invention, the separating step is carried out in an adjacent cyclone separator. However, in accordance with another embodiment of the invention, cyclone sep- arators are not required. Apparatus suitable for use in practicing the above- recited method are also disclosed.
417933
Kirby Eades Gale Baker
York-Shipley Inc.
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